CN104167189A

CN104167189A - Display driver and display driving method

Info

Publication number: CN104167189A
Application number: CN201310183059.4A
Authority: CN
Inventors: 郭嘉洵; 苏嘉伟; 陈季廷; 杨舜勋; 洪炜翔; 林英儒; 林立堂
Original assignee: Novatek Microelectronics Corp
Current assignee: Novatek Microelectronics Corp
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2014-11-26
Anticipated expiration: 2033-05-17
Also published as: CN104167189B

Abstract

The invention discloses a display driver, comprising: a first predetermined voltage level providing apparatus, used for providing a first predetermined voltage level group which includes at least a first predetermined voltage level; a first image data providing apparatus, used for outputting the first image data; and a detecting control circuit, used for deciding whether an output terminal of the first image data providing apparatus is pre-charged to the first predetermined voltage level according to a relation between a level absolute value of the first image data and an absolute value of the first predetermined voltage level.

Description

Display driver and display drive method

Technical field

The present invention relates to a kind of display driver and display drive method, especially about a kind of display driver and the display drive method that can save by precharge heat energy.

Background technology

The driving chip of LCD (liquid crystal display, liquid crystal display) can comprise source electrode driver (source driver) and two major parts of gate driver (gate driver) conventionally.Gate pole driver can be controlled the switch of thin film transistor (TFT) in LCD, and source electrode driver is after thin film transistor (TFT) conducting, image data (the required grey component level standard of show image) can be exported to LCD.

Fig. 1 has illustrated the source electrode driver 100 of prior art.As shown in Figure 1, source electrode driver 100 has comprised amplifier OP ₁, on-off element SW ₁.And equiva lent impedance R in Fig. 1 ₁with equivalent capacity C ₁equiva lent impedance and the equivalent capacity of LCD are represented.Amplifier OP ₁can image output data-signal IS ₁to LCD.But, under such framework, by amplifier OP ₁the voltage of output terminal draw high or be pulled low to image data must voltage, VT as shown in Figure 2 ₁or VT ₂time, allly draw high or reduce the electric current that the action of voltage produces and all must pass through amplifier OP ₁own itself resistance and at the on-off element SW of amplifier out ₁.Therefore can produce larger heat energy.

Summary of the invention

Therefore, an object of the present invention is openly a kind of display driver that produces less heat energy.

Another object of the present invention is open a kind of display drive method that produces less heat energy.

Embodiments of the invention disclose a kind of display driver, comprise: the first accurate generator in predetermined voltage position, and in order to accurate group of the first predetermined voltage position to be provided, wherein accurate group of this first predetermined voltage position comprises at least one the first predetermined voltage position standard; The first image data generator, in order to export the first image data; And detecting control circuit, in order to determine whether the output terminal of this first image data generator to be precharged to this first predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

An alternative embodiment of the invention discloses a kind of display drive method, comprises: accurate group of the first predetermined voltage position is provided, and wherein accurate group of this first predetermined voltage position comprises at least one the first predetermined voltage position standard; Use the first image data generator to export the first image data; And determine whether the output terminal of this first image data generator to be precharged to this first predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

According to aforesaid embodiment, can obtain at least one display drive method, it can be pushed away by previous embodiment, therefore here repeat no more.

By aforesaid embodiment, can be before image data generator output data, according to the characteristic of image data, the output terminal of image data generator is precharged to a predetermined level, the electric current that precharge action produces so only can be through one group of switch, and can be as prior art, electric current must, through multiple resistance, therefore can reduce the generation of heat energy.And, by detecting control circuit, in the time of nonpolar conversion, also can carry out the action of mean charge, the effect that both can reach power saving also can reduce the scope of precharge or charging, to reduce heat energy loss.

Brief description of the drawings

Fig. 1 has illustrated the circuit diagram of the source electrode driver of prior art.

Fig. 2 has illustrated the action schematic diagram of the source electrode driver shown in Fig. 1.

Fig. 3 has illustrated according to the circuit diagram of the single channel source electrode driver of the embodiment of the present invention.

Fig. 4 to Figure 31 has illustrated the action schematic diagram in the time that LCD polarity is changed according to the single channel source electrode driver of the embodiment of the present invention.

Figure 32 to Figure 37 has illustrated the action schematic diagram in the time that LCD polarity is not changed according to the single channel source electrode driver of the embodiment of the present invention.

Figure 38 has illustrated the circuit diagram of source electrode driver in accordance with another embodiment of the present invention.

Figure 39 has illustrated the action schematic diagram in the time that LCD polarity is changed according to the double-channel source electrode driver of the embodiment of the present invention.

Figure 40 has illustrated the action schematic diagram that also uses mean charge according to the double-channel source electrode driver of the embodiment of the present invention in the time that LCD polarity is not changed.

Figure 41 and Figure 42 have illustrated the action schematic diagram in the time that LCD polarity is not changed according to the double-channel source electrode driver of the embodiment of the present invention.

Figure 43 to Figure 45 has illustrated the detecting control circuit of source electrode driver according to an embodiment of the invention at the schematic diagram of diverse location.

Figure 46 has illustrated display drive method according to an embodiment of the invention.

Wherein, description of reference numerals is as follows:

100,300,1200,1600 source electrode drivers

301 first image data generators

303,305,1203, the 1205 accurate generators in predetermined voltage position

307 detecting control circuits

1201 second image data generators

1601 time schedule controllers

1603 transmission interfaces

1605,1,608 first buffers

1607,1,609 second buffers

1611,1613 quasi converters

1615,1617 digital analog converters

1901,1903,1905 steps

C ₁equivalent capacity

OP ₁amplifier

R ₁equivalent resistance

SW ₁on-off element

Embodiment

Fig. 3 has illustrated according to the circuit diagram of the source electrode driver 300 of the embodiment of the present invention.As shown in Figure 3, source electrode driver 300 comprises the accurate generator of a first image data generator 301 (being an amplifier in this example), predetermined voltage position 303, the accurate generator 305 in predetermined voltage position and a detecting control circuit 307.The first image data generator 301 is in order to export a first image data IS ₁.The accurate generator 303 in predetermined voltage position is in order to an accurate VPH in high predetermined voltage position to be provided, and the accurate generator 305 in predetermined voltage position is in order to provide an accurate VPL in low predetermined voltage position.The accurate VPL in low predetermined voltage position is contrary with the polarity of the high predetermined voltage accurate VPH in position.For instance, the accurate VPH in high predetermined voltage position is+1.8V that the accurate VPL in low predetermined voltage position is-1.8V (but not limiting).Detecting control circuit 307 is in order to according to the first image data IS ₁position accurate determine whether by the paramount predetermined voltage of the output terminal preliminary filling accurate VPH in position, the accurate VPL in low predetermined voltage position of the first image data generator 301 (namely allow switch conduction) in the accurate generator 305 of the accurate generator 303 in predetermined voltage position or predetermined voltage position with the relation of the accurate VPH in high predetermined voltage position or the low predetermined voltage accurate VPL in position.So please be careful, source electrode driver 300 is not limited to will have the accurate VPH in high predetermined voltage position and the accurate VPL in low predetermined voltage position simultaneously, also can only have one of them.And detecting control circuit 307 more can be according to the first image data IS ₁position accurate with another reference voltage V _refrelation, determine whether the paramount predetermined voltage of the output terminal preliminary filling accurate VPH in position, the accurate VPL in low predetermined voltage position or the reference voltage V of the first image data generator 301 _ref.There is various ways can implement detecting control circuit 307, for instance, allow detecting control circuit 307 automatically produce different output to reach the object of control according to the signal of being inputted with the composition of logic lock.Or, write the element as microprocessor and so on firmware, implement controlling mechanism.And the accurate generator 303 in predetermined voltage position is not limit single voltage is being provided, and a voltage level group can be provided, this voltage level group can comprise at least one accurate VPH in high predetermined voltage position.Same, the accurate generator 305 in predetermined voltage position and do not limit single voltage is being provided, and a voltage level group can be provided, this voltage level group can comprise or at least one accurate VPL in low predetermined voltage position.

The action of source electrode driver 300 will be described with icon in detail below.LCD display, for fear of the damage of liquid crystal cell, can make liquid crystal cell do the conversion of polarity conventionally, and image data position standard can be by just becoming negative or just being become by negative under this state.Fig. 4 to Figure 31 has illustrated the action schematic diagram in the time that LCD polarity is changed according to the source electrode driver of the embodiment of the present invention.In following embodiment, the accurate VPH in high predetermined voltage position is just and the accurate VPL in low predetermined voltage position is negative, and the accurate V in reference voltage position _refjie's between, 0 but also other value.The accurate V in reference voltage position in Fig. 3 _refpresentation mode only in order to for example, but know this skill person in the time can understanding at process image data, conventionally can provide a voltage to be used as the use of reference data and have multiple presentation mode.But please be careful, source electrode driver provided by the present invention can only have the accurate V in reference voltage position _ref, the accurate VPH in high predetermined voltage position and the accurate VPL in low predetermined voltage position one of them.

The embodiment of Fig. 4 to Figure 31 is combined by different qualities, and these characteristics have comprised:

Which voltage is as the first predetermined voltage position standard (the accurate VPH in high predetermined voltage position, the accurate VPL in low predetermined voltage position or the accurate V in reference voltage position that whether wants the basis for estimation of precharge _refone of them); The output terminal of source electrode driver is charged to which voltage in advance, the first predetermined voltage position is accurate or with the second accurate different predetermined voltage position standard of the first predetermined voltage position; Be charged in advance after the first predetermined voltage position standard or the second predetermined voltage position standard, whether be charged to again other voltage level, recharge to target voltage position standard; The accurate V in target voltage position _tvalue.

In the embodiment of Fig. 4, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is the first image data IS ₁the accurate and accurate V in target voltage position in position _tbetween the accurate VPH in high predetermined voltage position, the accurate VPL in low predetermined voltage position or the accurate V in reference voltage position _ref.So please be careful, the voltage level of preliminary filling can be along with the accurate V in target voltage position _tdifferent, can be according to " allowing on-off element SW in Fig. 1 ₁produce minimum heat energy " choose, but do not limit.For instance, if the accurate V in target voltage position _tat the accurate V in reference voltage position _refand between the standard of accurate VPL position, low predetermined voltage position, do not need the output terminal of source electrode driver to be charged in advance the accurate VPL in low predetermined voltage position.The embodiment of Fig. 4 is using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, if judge the first image data IS ₁position accurate higher than the accurate VPH in high predetermined voltage position, by the paramount predetermined voltage of the output terminal preliminary filling accurate VPH in position of source electrode driver.And after the paramount predetermined voltage of the preliminary filling accurate VPH in position, can be charged to again the accurate V in reference voltage position _ref, and then recharge to the accurate V in target voltage position after being charged to the accurate VPL in low predetermined voltage position _t.The embodiment of Fig. 5 is anti-phase with the embodiment of Fig. 4 but embodiment that logic is identical, that is to say using the accurate VPL in low predetermined voltage position as the first predetermined voltage position standard, and Fig. 4 is identical with Fig. 5 operational logic, and figure is also symmetrical, but the first image data IS of Fig. 5 ₁the accurate and accurate V in target voltage position in position _tsign contrary with Fig. 4.

In the embodiment of Fig. 6, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Fig. 6 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but after the paramount predetermined voltage of the preliminary filling accurate VPH in position, is only charged to the accurate V in reference voltage position _refthen just directly charge to the accurate V in target voltage position _t, and can not be charged to the accurate VPL in low predetermined voltage position.The embodiment of Fig. 7 is anti-phase with the embodiment of Fig. 6 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Fig. 8, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Fig. 8 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but it judges the first image data IS ₁the accurate absolute value in position higher than the accurate VPH absolute value in high predetermined voltage position after, the not paramount predetermined voltage of the preliminary filling accurate VPH in position but be charged in advance the accurate V in reference voltage position _ref(being different from the second predetermined voltage position standard of the first predetermined voltage position standard), and then be charged to the accurate VPL in low predetermined voltage position, recharge to the accurate V in target voltage position _t.The embodiment of Fig. 9 is anti-phase with the embodiment of Fig. 8 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 10, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Figure 10 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but is judging the first image data IS ₁position accurate absolute value higher than the accurate VPH absolute value in high predetermined voltage position the paramount predetermined voltage of the preliminary filling accurate VPH in position after, be only charged to the accurate VPL in low predetermined voltage position and then just directly charge to the accurate V in target voltage position _t, and can not be charged to the accurate V in reference voltage position _ref.The embodiment of Figure 11 is anti-phase with the embodiment of Figure 10 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 12, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Figure 12 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but is judging the first image data IS ₁position accurate absolute value higher than the accurate VPH absolute value in high predetermined voltage position the paramount predetermined voltage of the preliminary filling accurate VPH in position after, just directly charge to the accurate V in target voltage position _t, and can not be charged to other voltage level.The embodiment of Figure 12 is anti-phase with the embodiment of Figure 13 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 14, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Figure 14 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but it judges the first image data IS ₁the accurate absolute value in position higher than the accurate VPH absolute value in high predetermined voltage position after, the not paramount predetermined voltage of the preliminary filling accurate VPH in position but be charged in advance the accurate V in reference voltage position _ref(being different from the second predetermined voltage position standard of the first predetermined voltage position standard), then directly charge to the accurate V in target voltage position _t.The embodiment of Figure 15 is anti-phase with the embodiment of Figure 14 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 16, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is with the embodiment of Fig. 4.The embodiment of Figure 16 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but it judges the first image data IS ₁position accurate absolute value higher than the accurate VPH absolute value in high predetermined voltage position after, the not paramount predetermined voltage of the preliminary filling accurate VPH in position but be charged in advance the accurate VPL in low predetermined voltage position (being different from the second predetermined voltage position standard of the first predetermined voltage position standard), then directly charges to the accurate V in target voltage position _t.The embodiment of Figure 17 is anti-phase with the embodiment of Figure 16 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 18, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, but its target voltage V _tdifferent from previous embodiment, be negative and its absolute value between the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, the voltage level that therefore it may preliminary filling is the first image data IS ₁the accurate and accurate V in target voltage position in position _tbetween the accurate VPH in high predetermined voltage position or the accurate V in reference voltage position _ref.The embodiment of Figure 18 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard.In this embodiment, judge the first image data IS ₁the accurate absolute value in position higher than the accurate VPH absolute value in high predetermined voltage position after, can the paramount predetermined voltage of preliminary filling the accurate VPH in position be charged to again reference voltage V _ref, recharge to the accurate V in target voltage position _t.The embodiment of Figure 18 is anti-phase with the embodiment of Figure 19 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 20, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, its target voltage V _tidentical with the embodiment of Figure 18, be negative and its absolute value between the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, the voltage level that therefore it may preliminary filling is with the embodiment of Figure 18.The embodiment of Figure 20 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, and its target voltage V _tposition standard is to be also situated between at the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position _refbetween.In this embodiment, judge the first image data IS ₁the accurate absolute value in position higher than the accurate VPH absolute value in high predetermined voltage position after, can the paramount predetermined voltage of preliminary filling directly charge to the accurate V in target voltage position after the accurate VPH in position _t.The embodiment of Figure 21 is anti-phase with the embodiment of Figure 20 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 22, the first image data IS ₁position standard be just, and its absolute value is greater than the absolute value of the high predetermined voltage accurate VPH in position, the accurate V in its target voltage position _tidentical with the embodiment of Figure 18, be negative and its absolute value is situated between at the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, the voltage level that therefore it may preliminary filling is with the embodiment of Figure 18.The embodiment of Figure 22 is also using the accurate VPH in high predetermined voltage position as the first predetermined voltage position standard, but it judges the first image data IS ₁the accurate absolute value in position higher than the accurate VPH absolute value in high predetermined voltage position after, the not paramount predetermined voltage of the preliminary filling accurate VPH in position but be charged in advance the accurate V in reference voltage position _ref, then directly charge to the accurate V in target voltage position _t, and the accurate V in target voltage position _tbe situated between at the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position _refbetween.The embodiment of Figure 23 is anti-phase with the embodiment of Figure 22 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 24, the first image data IS ₁position standard be just, and its absolute value is situated between at the accurate VPH in high predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the absolute value of the low predetermined voltage accurate VPL in position, the voltage level that therefore it may preliminary filling is the first image data IS ₁the accurate and accurate V in target voltage position in position _tbetween the accurate VPL in low predetermined voltage position or the accurate V in reference voltage position _ref.The embodiment of Figure 24 is with the accurate V in reference voltage position _refas the first predetermined voltage position standard, it judges the first image data IS ₁position accurate absolute value higher than the accurate V in reference voltage position _refafter absolute value, the output terminal of source electrode driver can be charged in advance to the accurate V in reference voltage position _refand then be charged in advance the accurate VPL in low predetermined voltage position, then charge to the accurate V in target voltage position _t, and the accurate V in target voltage position _tabsolute value be greater than the absolute value of the low predetermined voltage accurate VPL in position.The embodiment of Figure 25 is anti-phase with the embodiment of Figure 24 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 26, the first image data IS ₁position standard be just, and its absolute value is situated between at the accurate VPH in high predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the accurate VPL in low predetermined voltage position, the voltage level that therefore it may preliminary filling is with the embodiment of Figure 24.The embodiment of Figure 26 is with the accurate V in reference voltage position _refas the first predetermined voltage position standard, it judges the first image data IS ₁position accurate absolute value higher than the accurate V in reference voltage position _refafter absolute value, the output terminal of source electrode driver can be charged in advance to the accurate V in reference voltage position _refthen directly charge to the accurate V in target voltage position _t.The embodiment of Figure 27 is anti-phase with the embodiment of Figure 26 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 28, the first image data IS ₁position standard be just, and its absolute value is situated between at the accurate VPH in high predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, and the accurate V in target voltage position _tbe negative and its absolute value is greater than the accurate VPL in low predetermined voltage position, the voltage level that therefore it may preliminary filling is with the embodiment of Figure 24.The embodiment of Figure 28 is with the accurate V in reference voltage position _refas the first predetermined voltage position standard, it judges the first image data IS ₁position accurate absolute value higher than the accurate V in reference voltage position _refafter absolute value, the output terminal of source electrode driver can't be charged in advance to the accurate V in reference voltage position _ref, but be charged in advance the accurate VPL in low predetermined voltage position (being different from the second predetermined voltage position standard of the first predetermined voltage position standard), then directly charge to the accurate V in target voltage position _t.The embodiment of Figure 29 is anti-phase with the embodiment of Figure 28 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 30, the first image data IS ₁position standard be just, and its absolute value is situated between at the accurate VPH in high predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, and the accurate V in target voltage position _tnegative and its absolute value is situated between at the accurate VPH in low predetermined voltage position and the accurate V in reference voltage position _refabsolute value between, the voltage level that therefore it may preliminary filling is the first image data IS ₁the accurate and accurate V in target voltage position in position _tbetween the accurate V in reference voltage position _ref.The embodiment of Figure 30 is with the accurate V in reference voltage position _refas the first predetermined voltage position standard, it judges the first image data IS ₁position accurate absolute value higher than the accurate V in reference voltage position _refafter absolute value, the output terminal of source electrode driver can be charged in advance to the accurate V in reference voltage position _refthen directly charge to the accurate V in target voltage position _t.The embodiment of Figure 31 is anti-phase with the embodiment of Figure 30 but embodiment that logic is identical, repeats no more at this.

Figure 32 to Figure 37 has shown the action schematic diagram in the time that LCD polarity is not changed according to the source electrode driver of the embodiment of the present invention.In following embodiment, the accurate VPH in high predetermined voltage position is just and the accurate VPL in low predetermined voltage position is negative, and the accurate V in reference voltage position _refjie's between, 0 or other value.In the time that LCD polarity is not changed, the data of adjacent two pixel lines are to be all just or all negative.Now detecting control circuit can be followed according to the accurate absolute value in the position of the image data of adjacent two pixel lines the relation of the absolute value of the accurate VPH in high predetermined voltage position or the low predetermined voltage accurate VPL in position, by the paramount predetermined voltage of the output terminal precharge accurate VPH in position of the first image data generator 301, the accurate V in reference voltage position _refor the accurate VPL in low predetermined voltage position.And in the embodiment of Figure 32 to Figure 36, can determine whether wanting preliminary filling and will be charged in advance which voltage level with pixel line image data position standard now according to the image data position of last pixel line is accurate.

Shown in figure 32, as the image data (L of last pixel line _n-1) its accurate absolute value is greater than the accurate VPH in high predetermined voltage position (the first predetermined voltage position standard) and pixel line (L now _n) the absolute value of image data position standard while being less than the high predetermined voltage accurate VPH in position, detecting control circuit 307 can be by the paramount predetermined voltage of the output terminal precharge accurate VPH in position of the first image data generator 301, and then charges to the accurate V in target voltage position _t(now the image data position standard of pixel line).The embodiment of Figure 33 is anti-phase with the embodiment of Figure 32 but embodiment that logic is identical, repeats no more at this.

And in the embodiment of Figure 34, its accurate absolute value of the image data of last pixel line be greater than the accurate VPH in high predetermined voltage position and now the absolute value of the image data position standard of pixel line be less than the accurate VPH in high predetermined voltage position, but different from the embodiment of Figure 32, in Figure 34 embodiment, the absolute value of the image data position standard of pixel line approaches the accurate V in reference voltage position now _refinstead of the accurate VPH in high predetermined voltage position, therefore detecting control circuit 307 can be precharged to the accurate V in reference voltage position by the output terminal of the first image data generator 301 _refinstead of the accurate VPH in high predetermined voltage position, and then charge to the accurate V in target voltage position _t.The embodiment of Figure 35 is anti-phase with the embodiment of Figure 34 but embodiment that logic is identical, repeats no more at this.

In the embodiment of Figure 36, when the image data of last pixel line (indicates L _n-1region) the accurate absolute value in position be less than the accurate VPH in high predetermined voltage position (the first predetermined voltage position standard) and now the image data of pixel line (indicate L _nregion) the accurate absolute value in position is while being greater than the high predetermined voltage accurate VPH in position, detecting control circuit 307 can be by the paramount predetermined voltage of the output terminal precharge accurate VPH in position of the first image data generator 301, and then charges to the accurate V in target voltage position _t(now the image data position standard of pixel line).The embodiment of Figure 37 is anti-phase with the embodiment of Figure 36 but embodiment that logic is identical, repeats no more at this.

Also please be careful, in the embodiment shown in Fig. 4 to Figure 37, further comprise a data read signal LD, the first image data generator 301 in its presentation graphs 3 is about to output data.In one embodiment, precharge action is to move in the time of the high levels of data read signal LD, and the first image data generator 301 is image output data in the time of the low level of data read signal LD, but do not limit, its also can other sequential as data read signal LD edge falls and time start to carry out precharge action.

Referring again to Fig. 3, in Fig. 3, detecting control circuit 307 is only controlled the image data transmission of single channel, but detecting control circuit 307 can be controlled two channels or above image data transmission.As shown in figure 38, except the first image data generator 301, the accurate generator 305 of the accurate generator 303 in predetermined voltage position and predetermined voltage position, can control another group passage, it comprises the second image data generator 1201, the accurate generator 1205 of the accurate generator 1203 in predetermined voltage position and predetermined voltage position again.This two channel transmits respectively the first image data IS ₁and the second image data IS ₂.In the time controlling multiple passage, identical when its precharge mechanisms merchandiser passage, therefore detecting control circuit 307 also can be controlled the accurate generator 1205 in the second image data generator 1201, the accurate generator 1203 in predetermined voltage position and predetermined voltage position and implement the precharge action as Fig. 4 to Figure 37.And in this embodiment, detecting control circuit 307 produces control signal CS ₁-CS ₅carry out gauge tap element SW ₁and on-off element in the accurate generator 305,1205 of the accurate generator 303,1203 in predetermined voltage position and predetermined voltage position.

Below will illustrate, according to the action schematic diagram of the double-channel source electrode driver of the embodiment of the present invention.But please be careful, because aforesaid embodiment is quite a lot of, therefore only several in corresponding previous embodiment of following binary channels embodiment, but not in order to limit the present invention, each passage in binary channels can use any pre-charge method of previous embodiment.Figure 39 has illustrated the action schematic diagram in the time that LCD polarity is changed according to the double-channel source electrode driver of the embodiment of the present invention, and it is the combination of Fig. 8 and Fig. 9 embodiment action.As shown in figure 39, the first image data IS ₁can be from just becoming negative, the first image data IS ₁the accurate absolute value in position be greater than the absolute value of the high predetermined voltage accurate VPH in position, therefore can carry out the action of the paramount predetermined voltage of the output terminal preliminary filling accurate VPH in position of Source drive, and the second image data IS ₂can just become from negative the first image data IS ₁the accurate absolute value in position be greater than the absolute value of the high predetermined voltage accurate VPH in position, therefore can carry out the action that the output terminal of Source drive is charged in advance to the low predetermined voltage accurate VPL in position.

In the aforementioned embodiment, be all in the time that data read signal LD is high levels, to carry out precharge action.But in the embodiment of Figure 39, more can be in the time that data read signal LD is high levels first the output terminal short circuit of the first image data generator 301 and the second image data generator 1201 (be allowed to on-off element SW ₁conducting), approach a standard between the accurate VPH in high predetermined voltage position and the accurate VPL in low predetermined voltage position (the also accurate V in reference voltage position with mean charge by its standard _ref), and then at follow-up time cycle P ₁execution precharge action, by the output terminal of the source electrode driver paramount predetermined voltage of the preliminary filling accurate VPH in position or the accurate VPL in low predetermined voltage position respectively.But also can not carry out the action of mean charge and directly carry out precharge action.The execution of mean charge action can be triggered by multiple condition, is that the data that detect two adjacent pixel lines must be carried out the action that polarity is changed if wherein a kind of, after the data output of Article 1 pixel line, does the action of mean charge.If because there is the action of polarity conversion, just signal level can be by just becoming negative or just being become by negative, and the action of carrying out mean charge can allow the position standard of output terminal of its image data generator approach the accurate V in reference voltage position _ref, and must not connect the position standard that charges to another polarity from the position collimation of a polarity.And carrying out after precharge action, the first image data generator 301 and the second image data generator 1201 can be charged to respectively the accurate V in target voltage position _t1and V _t2.In another embodiment, the first image data IS ₁just becoming from negative, and the second image data IS ₂can be from just becoming negative, at this moment its curve can be exchanged each other, and other detailed features of this example is all described in the embodiment of Figure 39, therefore repeat no more at this.

The embodiment of Figure 40 has also comprised the mean charge action described in Figure 39, but the accurate V in target voltage position of two embodiment _t1, V _t2difference, and embodiment described in Figure 40 is the state of not changing in polarity.With the first image data IS ₁for example, the accurate V in target voltage position in Figure 39 _tabsolute value be less than the accurate VPL in low predetermined voltage position, but in the embodiment of Figure 40, the first image data IS ₁target voltage position standard be situated between at the accurate V in reference voltage position _refand between the accurate VPL in low predetermined voltage position.Therefore, the embodiment of Figure 39, by after the output terminal short circuit of the first image data generator 301 and the second image data generator 1201, understands at time cycle P ₁time, the paramount predetermined voltage of the precharge accurate VPH in position or the accurate VPL in low predetermined voltage position.But the embodiment of Figure 40, by after the output terminal short circuit of the first image data generator 301 and the second image data generator 1201, is just directly charged to the accurate V in target voltage position _t, and there is no the action of precharge.By the action of mean charge, can first move the position standard of the output terminal of each image data generator to same average potential, with the scope of precharge after reducing or charging, reach power saving and economize hot effect.

Figure 41 has illustrated the action schematic diagram in the time that LCD polarity is not changed according to the double-channel source electrode driver of the embodiment of the present invention.In the embodiment of Figure 41, the first image data IS ₁situation identical with the embodiment of Figure 36, and the second image data IS ₂situation identical with the embodiment of Figure 37, therefore can apply mechanically respectively the pre-charge method shown in Figure 36 and Figure 37.Figure 42 has also illustrated the action schematic diagram in the time that LCD polarity is not changed according to the double-channel source electrode driver of the embodiment of the present invention.In the embodiment of Figure 42, the first image data IS ₁situation identical with the embodiment of Figure 32, and the second image data IS ₂situation identical with the embodiment of Figure 33, therefore can apply mechanically respectively the pre-charge method shown in Figure 32 and Figure 33.In the embodiment of Figure 41 and Figure 42, the first image data IS ₁with the second image data IS ₂situation can exchange each other, at this moment its curve also can be exchanged each other, the pre-charge method after exchanging is identical with the method described in Figure 41 and Figure 42, therefore repeat no more at this.

Figure 43 to Figure 45 has illustrated the detecting control circuit of source electrode driver according to an embodiment of the invention at the schematic diagram of diverse location.But please be careful the structure of Figure 43 to Figure 45 only in order to for example, non-in order to limit the present invention.As shown in figure 43, source electrode driver 1600 has comprised a time schedule controller 1601, transmission interface 1603 and the first buffer 1605,1608, the second buffer 1607,1609, position quasi converter 1611,1613, digital analog converter 1615,1617, and aforesaid the first image data generator 301 and the second image data generator 1201.Please be careful for convenience of description, in aforesaid embodiment, subelement does not illustrate in Figure 43 to Figure 45.Time schedule controller 1601 is in order to control the sequential of other element, and transmission interface 1603 is in order to transmit image data (also can transmit other signal).The first buffer 1605,1608 is in order to temporary image data, after the image data that is accumulate to a complete pixel line until it, just can send the second buffer 1607,1609 to, the second buffer 1607,1609 can be exported to the first image data generator 301 and the second image data generator 1201 by image data, middle can be through the processing of position quasi converter 1611,1613, digital analog converter 1615,1617.

Therefore, the input end of detecting control circuit 307 can be coupled to the output terminal of the first buffer 1605,1608 and the second buffer 1607,1609, to obtain the information of different pixels line image data, as shown in figure 43.Or, detecting control circuit 307 can directly be coupled to transmission interface 1603, because transmission interface 1603 rear ends have quite a lot of element, therefore detecting control circuit 307 be directly coupled to transmission interface 1603 can avoid with numerous elements position in same district, properly to use the remaining space in chip.Or as shown in figure 44, detecting control circuit 307 can be incorporated into time schedule controller 1601.In the embodiment of Figure 44, firmware write timing controller 1601 can be implemented to the function of detecting control circuit 307.

According to aforesaid embodiment, can obtain a display drive method, as shown in figure 46, it has comprised the following step:

Step 1901

A first predetermined voltage position standard (the example accurate VPH in high predetermined voltage position, the accurate VPL in low predetermined voltage position and the accurate V in reference voltage position is as shown in Figure 3 provided _refone of them).

Step 1903

Use a first image data IS of first image data generator 301 (as a Fig. 3) output ₁.

Step 1905

Determine whether the output terminal of the first image data generator to be precharged to this first predetermined voltage position standard (for example work as predetermined voltage position standard with VPH, and be precharged to VPH) according to the relation of the absolute value of the absolute value of the first image data position standard and the first predetermined voltage position standard.

This method can further comprise provides another predetermined voltage position accurate i.e. the second predetermined voltage position standard).In this case, step 1905 can be modified to according to the relation of the absolute value of the absolute value of the first image data position standard and predetermined voltage position standard and determine whether the output terminal of the first image data generator to be precharged to other predetermined voltage position standard (for example work as predetermined voltage position standard with VPH, but be precharged to VPL).Other detailed step can be pushed away easily by previous embodiment, therefore repeat no more at this.

By aforesaid embodiment, can be before image data generator output data, according to the characteristic of image data, the output terminal of image data generator is precharged to a predetermined level, the electric current that precharge action produces so only can be through one group of switch, and can be as prior art, electric current must, through multiple resistance, therefore can reduce the generation of heat energy.And, in the time of nonpolar conversion, can carry out the action of mean charge, make the action of precharge or charging more quick.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. a display driver, comprises:

The first accurate generator in predetermined voltage position, in order to accurate group of the first predetermined voltage position to be provided, wherein accurate group of this first predetermined voltage position comprises at least one the first predetermined voltage position standard;

The first image data generator, in order to export the first image data; And

Detecting control circuit, in order to determine whether the output terminal of this first image data generator to be precharged to this first predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

2. display driver as claimed in claim 1, wherein this detecting control circuit, in the time that this accurate absolute value of this first signal of video signal is greater than the absolute value of this first predetermined voltage position standard, is precharged to this first predetermined voltage position standard by this output terminal of this first image data generator.

3. display driver as claimed in claim 2, further comprise the second accurate generator in predetermined voltage position, in order to accurate group of the second predetermined voltage position to be provided, wherein accurate group of this second predetermined voltage position comprises at least one the second predetermined voltage position standard, and wherein the polarity of this second predetermined voltage position standard is accurate contrary with this first predetermined voltage position;

The accurate generator in reference voltage position, in order to reference voltage position standard to be provided, wherein this reference voltage position is accurate is situated between between and this second predetermined voltage position standard accurate in this first predetermined voltage position;

Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this first predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein this target voltage position is accurate is situated between between and this reference voltage position standard accurate in this second predetermined voltage position.

4. display driver as claimed in claim 2, further comprise the second accurate generator in predetermined voltage position, in order to accurate group of the second predetermined voltage position to be provided, wherein accurate group of this second predetermined voltage position comprises at least one the second predetermined voltage position standard, and wherein the polarity of this second predetermined voltage position standard is accurate contrary with this first predetermined voltage position;

Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this first predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein the absolute value of this target voltage position standard is greater than this absolute value of this second predetermined voltage position standard.

5. display driver as claimed in claim 2, further comprises:

The accurate generator in high predetermined voltage position, in order to accurate group of high predetermined voltage position to be provided, wherein accurate group of this high predetermined voltage position comprises at least one high predetermined voltage position standard;

The accurate generator in low predetermined voltage position, in order to accurate group of low predetermined voltage position to be provided, wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, and wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position;

Wherein this first predetermined voltage be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them.

6. display driver as claimed in claim 5, further comprises:

Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this first predetermined voltage position standard, this output terminal is charged to this reference voltage position standard in advance, then be charged in advance this second predetermined voltage position standard, then this output terminal charged to target voltage position standard.

7. display driver as claimed in claim 5, further comprises:

Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this first predetermined voltage position standard, by this output terminal be charged in advance accurate and this second predetermined voltage position, this reference voltage position accurate one of them, then be charged in advance this second predetermined voltage position standard, then this output terminal charged to target voltage position standard.

8. display driver as claimed in claim 2, further comprises:

The accurate generator in low predetermined voltage position, in order to accurate group of low predetermined voltage position to be provided, wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard;

The accurate generator in reference voltage position, in order to provide reference voltage position standard as this first predetermined voltage position standard, wherein this reference voltage position is accurate is situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position.

9. display driver as claimed in claim 8,

Wherein this detecting control circuit is precharged to this output terminal after this first predetermined voltage position standard, by this output terminal be charged in advance accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them, then this output terminal is charged to target voltage position standard.

10. display driver as claimed in claim 2, it is liquid crystal display, wherein this liquid crystal display comprises at least one liquid crystal cell, this detecting control circuit, in the time of the polarity conversion of this liquid crystal cell, just can be precharged to this output terminal of this first image data generator this first predetermined voltage position standard.

11. display drivers as claimed in claim 1, use in liquid crystal display, this liquid crystal display comprises many pixel lines, and this detecting control circuit, in the time meeting one of following two conditions, is precharged to this first predetermined voltage position standard by this output terminal of this first image data generator;

The accurate absolute value in position of the image data of last pixel line is less than the absolute value of this first predetermined voltage position standard, and the accurate absolute value in position of the image data of pixel line is greater than the absolute value of this first predetermined voltage position standard now; And

The accurate absolute value in position of the image data of last pixel line is greater than the absolute value of this first predetermined voltage position standard, and the accurate absolute value in position of this image data of pixel line is less than the absolute value of this first predetermined voltage position standard now.

12. display drivers as claimed in claim 11, wherein this liquid crystal display comprises liquid crystal cell, when this detecting control circuit is not changed in the polarity of this liquid crystal cell, just this output terminal of this first image data generator can be precharged to this first predetermined voltage position standard.

13. display drivers as claimed in claim 1, use in liquid crystal display, and this liquid crystal display comprises many pixel lines, and this display driver comprises:

The accurate generator in low predetermined voltage position, in order to accurate group of low predetermined voltage position to be provided, wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position, and this first predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them;

The accurate generator in reference voltage position, in order to reference voltage position standard to be provided, this reference voltage position is accurate to be situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position;

This detecting control circuit is greater than the accurate absolute value in the position accurate and image data of pixel line now, this first predetermined voltage position at the accurate absolute value in the position of the image data of last pixel line and is less than this first predetermined voltage position standard, and this is precharged to this reference voltage position standard by this output terminal of this first image data generator when difference of the absolute value of accurate this absolute value in the position of the image data of pixel line and this reference voltage position standard is less than with the difference of this first predetermined voltage position standard now.

14. display drivers as claimed in claim 1, use in liquid crystal display, and this liquid crystal display comprises many pixel lines, and this display driver further comprises:

The second image data generator, in order to export the second image data;

This detecting control circuit is in the time meeting following condition, by the output terminal short circuit of this accurate generator in the first predetermined voltage position and the second accurate generator in predetermined voltage position;

15. display drivers as claimed in claim 14, wherein this liquid crystal display comprises liquid crystal cell, when this detecting control circuit is not changed in the polarity of this liquid crystal cell, just can make the output terminal short circuit of this first image data generator and this second image data generator.

16. display drivers as claimed in claim 14, comprise:

The second image data generator, in order to export the second image data;

Wherein this detecting control circuit produces data read signal and gives this first image data generator, this data read signal has the first logic level and the second logic level, the time cycle of this first logic level is less than the time cycle of this second logic level, this detecting control circuit makes the output terminal short circuit of this first image data generator and this second image data generator in the time that this data read signal is this first logic level, then just this output terminal of this first image data generator is precharged to this first predetermined voltage position standard.

17. display drivers as claimed in claim 1, wherein this detecting control circuit produces data read signal and gives this first image data generator, this data read signal has the first logic level and the second logic level, the time cycle of this first logic level is less than the time cycle of this second logic level, this detecting control circuit is precharged to this output terminal of this first image data generator this first predetermined voltage position standard in the time that this data read signal is this first logic level, and this first image data generator is exported this first image data at this second logic level.

18. display drivers as claimed in claim 1, are Source drives, and this first image data generator is amplifier.

19. display drivers as claimed in claim 1, use in liquid crystal display, and this liquid crystal display comprises many pixel lines, and this display driver further comprises:

The first buffer, from one of them image data of the plurality of pixel line, and in the time that this temporary image data forms the partial data of pixel line, exports this image data in order to temporary; And

The second buffer, receives this image data of this first buffer output, and exports this image data to this first image data generator;

Wherein this detecting control circuit couples the output terminal of this first buffer and this second buffer.

20. display drivers as claimed in claim 1, further comprise:

Buffer, from one of them image data of the plurality of pixel line, and in the time that this temporary image data forms the partial data of a pixel line, exports this image data in order to temporary; And

Transmission interface, give this buffer in order to image output data:

Wherein this detecting control circuit couples this output interface.

21. display drivers as claimed in claim 1, further comprise:

Sequential detecting control circuit, in order to control the sequential of this display driver, wherein this detecting control circuit is incorporated in this sequential detecting control circuit.

22. 1 kinds of display drivers, comprise:

The second accurate generator in predetermined voltage position, in order to accurate group of the second predetermined voltage position to be provided, wherein accurate group of this second predetermined voltage position comprises at least one the second predetermined voltage position standard, wherein the polarity of this second predetermined voltage position standard is accurate contrary with this first predetermined voltage position, or the absolute value of this second predetermined voltage position standard is less than the absolute value of this first predetermined voltage position standard;

The first image data generator, in order to export the first image data; And

Detecting control circuit, in order to determine whether the output terminal of this first image data generator to be precharged to this second predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

23. display drivers as claimed in claim 22, further comprise

The accurate generator in reference voltage position, in order to reference voltage position standard to be provided, wherein the polarity of this second predetermined voltage position standard is accurate contrary and this reference voltage position is accurate is situated between between and this second predetermined voltage position standard accurate in this first predetermined voltage position with this first predetermined voltage position;

Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this second predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein this target voltage position is accurate is situated between between and this reference voltage position standard accurate in this second predetermined voltage position.

24. display drivers as claimed in claim 22, further comprise the accurate generator in reference voltage position, in order to reference voltage position standard to be provided, wherein the polarity of this second predetermined voltage position standard is accurate contrary and this reference voltage position is accurate is situated between between and this second predetermined voltage position standard accurate in this first predetermined voltage position with this first predetermined voltage position; Wherein this detecting control circuit is precharged to this output terminal of this first image data generator after this second predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein the absolute value of this target voltage position standard is greater than the absolute value of this second predetermined voltage position standard.

25. display drivers as claimed in claim 22, further comprise:

Wherein this first predetermined voltage position standard is that accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them and this second predetermined voltage position standard are another ones in accurate and this low predetermined voltage position standard in this high predetermined voltage position.

26. display drivers as claimed in claim 22, further comprise:

The accurate generator in low predetermined voltage position, in order to accurate group of low predetermined voltage position to be provided, wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, and wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position; And

The accurate generator in reference voltage position, in order to provide reference voltage position standard as this second predetermined voltage position standard, wherein this reference voltage position accurate be situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position and this first predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them.

27. display drivers as claimed in claim 26,

Wherein this detecting control circuit is precharged to this output terminal after this second predetermined voltage position standard, it is not that of this first predetermined voltage position standard that this output terminal is charged in accurate and this low predetermined voltage position standard in this high predetermined voltage position in advance, then this output terminal is charged to target voltage position standard.

28. display drivers as claimed in claim 22, further comprise:

The accurate generator in reference voltage position, in order to provide reference voltage position standard as this first predetermined voltage position standard, wherein this reference voltage position is accurate is situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position, and this second predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them.

29. 1 kinds of display drive methods, comprise:

Accurate group of the first predetermined voltage position is provided, and wherein accurate group of this first predetermined voltage position comprises at least one the first predetermined voltage position standard;

Use the first image data generator to export the first image data; And

Determine whether the output terminal of this first image data generator to be precharged to this first predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

30. display drive methods as claimed in claim 29, when this accurate absolute value that is further included in this first image data is greater than the absolute value of this first predetermined voltage position standard, this output terminal of this first image data generator is precharged to this first predetermined voltage position standard.

31. display drive methods as claimed in claim 30, further comprise:

Accurate group of the second predetermined voltage position is provided, and wherein accurate group of this second predetermined voltage position comprises at least one the second predetermined voltage position standard, and wherein the polarity of this second predetermined voltage position standard is accurate contrary with this first predetermined voltage position;

Reference voltage position standard is provided, and wherein this reference voltage position is accurate is situated between between and this second predetermined voltage position standard accurate in this first predetermined voltage position;

This output terminal of this first image data generator is precharged to after this first predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein this target voltage position is accurate is situated between between and this reference voltage position standard accurate in this second predetermined voltage position.

32. display drive methods as claimed in claim 30, further comprise:

This output terminal of this first image data generator is precharged to after this first predetermined voltage position standard, more this output terminal is charged to target voltage position standard, wherein the absolute value of this target voltage position standard is greater than this absolute value of this second predetermined voltage position standard.

33. display drive methods as claimed in claim 30, further comprise:

Accurate group of high predetermined voltage position is provided, and wherein accurate group of this high predetermined voltage position comprises at least one high predetermined voltage position standard;

Accurate group of low predetermined voltage position is provided, and wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, and wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position;

Using this high predetermined voltage position accurate and this low predetermined voltage position accurate one of them as this first predetermined voltage position standard.

34. display drive methods as claimed in claim 33, further comprise:

This output terminal of this first image data generator is precharged to after this first predetermined voltage position standard, this output terminal is charged to this reference voltage position standard in advance, be then charged in advance this second predetermined voltage position standard, then this output terminal is charged to target voltage position standard.

35. display drive methods as claimed in claim 33, further comprise:

This output terminal of this first image data generator is precharged to after this first predetermined voltage position standard, by this output terminal be charged in advance accurate and this second predetermined voltage position, this reference voltage position accurate one of them, then be charged in advance this second predetermined voltage position standard, then this output terminal charged to target voltage position standard.

36. display drive methods as claimed in claim 30, further comprise:

Accurate group of low predetermined voltage position is provided, and wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard;

Provide reference voltage position standard as this first predetermined voltage position standard, wherein this reference voltage position is accurate is situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position.

37. display drive methods as claimed in claim 36,

This output terminal is precharged to after this first predetermined voltage position standard, by this output terminal be charged in advance accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them, then this output terminal is charged to target voltage position standard.

38. display drive methods as claimed in claim 30, are to use in liquid crystal display, and wherein this liquid crystal display comprises liquid crystal cell, and this display drive method comprises:

In polarity when conversion of this liquid crystal cell, just this output terminal of this first image data generator can be precharged to this this first predetermined voltage position standard.

39. display drive methods as claimed in claim 29, use in liquid crystal display, this liquid crystal display comprises many pixel lines, this display drive method, in the time meeting one of following two conditions, is precharged to this first predetermined voltage position standard by this output terminal of this first image data generator;

40. display drive methods as claimed in claim 39, wherein this liquid crystal display comprises liquid crystal cell, when this display drive method is not changed in the polarity of this liquid crystal cell, just this output terminal of this first image data generator can be precharged to this first predetermined voltage position standard.

41. display drive methods as claimed in claim 29, use in liquid crystal display, and this liquid crystal display comprises many pixel lines, and this display drive method comprises:

Accurate group of low predetermined voltage position is provided, wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position, and this first predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them;

Reference voltage position standard is provided, and this reference voltage position is accurate to be situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position;

Be greater than the accurate absolute value in the position accurate and image data of pixel line now, this first predetermined voltage position at the accurate absolute value in the position of the image data of last pixel line and be less than this first predetermined voltage position standard, and this is precharged to this reference voltage position standard by this output terminal of this first image data generator when difference of the absolute value of accurate this absolute value in the position of the image data of pixel line and this reference voltage position standard is less than with the difference of this first predetermined voltage position standard now.

42. display drive methods as claimed in claim 29, use in liquid crystal display, and this liquid crystal display comprises many pixel lines, and this display drive method further comprises:

Use the second image data generator to export the second image data;

While meeting following condition, by the output terminal short circuit of this accurate generator in the first predetermined voltage position and the second accurate generator in predetermined voltage position;

43. display drive methods as claimed in claim 42, wherein this liquid crystal display comprises liquid crystal cell, when this display drive method is not changed in the polarity of this liquid crystal cell, just can make the output terminal short circuit of this first image data generator and this second image data generator.

44. display drive methods as claimed in claim 42, comprise:

Use the second image data generator to export the second image data;

Produce data read signal and give this first image data generator, this data read signal has the first logic level and the second logic level, the time cycle of this first logic level is less than the time cycle of this second logic level, this display drive method makes the output terminal short circuit of this first image data generator and this second image data generator in the time that this data read signal is this first logic level, then just this output terminal of this first image data generator is precharged to this first predetermined voltage position standard.

45. display drive methods as claimed in claim 29, comprise and produce data read signal to this first image data generator, this data read signal has the first logic level and the second logic level, the time cycle of this first logic level is less than the time cycle of this second logic level, this display drive method is precharged to this output terminal of this first image data generator this first predetermined voltage position standard in the time that this data read signal is this first logic level, and make this first image data generator export this first image data at this second logic level.

46. 1 kinds of display drive methods, comprise:

Accurate group of the second predetermined voltage position is provided, wherein accurate group of this second predetermined voltage position comprises at least one the second predetermined voltage position standard, wherein the polarity of this second predetermined voltage position standard is accurate contrary with this first predetermined voltage position, or the absolute value of this second predetermined voltage position standard is less than the absolute value of this first predetermined voltage position standard;

Use the first image data generator to export the first image data; And

Determine whether the output terminal of this first image data generator to be precharged to this second predetermined voltage position standard according to the relation of the absolute value of the accurate absolute value in the position of this first image data and this first predetermined voltage position standard.

47. display drive methods as claimed in claim 46, further comprise:

Reference voltage position standard is provided, and wherein the polarity of this second predetermined voltage position standard is accurate contrary and this reference voltage position is accurate is situated between between and this second predetermined voltage position standard accurate in this first predetermined voltage position with this first predetermined voltage position; And

This output terminal of this first image data generator is precharged to after this second predetermined voltage position standard, more this output terminal is charged to target voltage position standard;

Wherein this target voltage position is accurate is situated between between and this reference voltage position standard accurate in this second predetermined voltage position.

48. display drive methods as claimed in claim 46, further comprise:

Wherein the absolute value of this target voltage position standard is greater than this absolute value of this second predetermined voltage position standard.

49. display drive methods as claimed in claim 46, further comprise:

Wherein this first predetermined voltage is that accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them and this second predetermined voltage are another ones in accurate and this low predetermined voltage position standard in this high predetermined voltage position.

50. display drive methods as claimed in claim 46, further comprise:

Accurate group of low predetermined voltage position is provided, and wherein accurate group of this low predetermined voltage position comprises at least one low predetermined voltage position standard, and wherein the polarity of this high predetermined voltage position standard is accurate contrary with this low predetermined voltage position; And

Provide reference voltage position standard as this second predetermined voltage position standard;

Wherein this reference voltage position accurate be situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position and this first predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them.

51. display drive methods as claimed in claim 50, further comprise:

This output terminal is precharged to after this second predetermined voltage position standard, and it is not that of this first predetermined voltage position standard that this output terminal is charged in accurate and this low predetermined voltage position standard in this high predetermined voltage position in advance, then this output terminal is charged to target voltage position standard.

52. display drive methods as claimed in claim 46, further comprise:

Provide reference voltage position standard as this first predetermined voltage position standard, wherein this reference voltage position is accurate is situated between between and this low predetermined voltage position standard accurate in this high predetermined voltage position, and this second predetermined voltage position standard be accurate and this low predetermined voltage position, this high predetermined voltage position accurate one of them.