CN100433118C - Recognition apparatus and method for source driver of chip-on-glass packaged liquid crystal display - Google Patents

Recognition apparatus and method for source driver of chip-on-glass packaged liquid crystal display Download PDF

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Publication number
CN100433118C
CN100433118C CNB2005100628242A CN200510062824A CN100433118C CN 100433118 C CN100433118 C CN 100433118C CN B2005100628242 A CNB2005100628242 A CN B2005100628242A CN 200510062824 A CN200510062824 A CN 200510062824A CN 100433118 C CN100433118 C CN 100433118C
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CN
China
Prior art keywords
source electrode
electrode driver
control signal
identification code
signal
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CNB2005100628242A
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Chinese (zh)
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CN1841481A (en
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陈建儒
陈俊荣
陈英烈
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Himax Technologies Ltd
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Himax Technologies Ltd
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Priority to CNB2005100628242A priority Critical patent/CN100433118C/en
Priority to EP06005205A priority patent/EP1708154A3/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0281—Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2352/00—Parallel handling of streams of display data
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/08—Details of image data interface between the display device controller and the data line driver circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general

Abstract

The present invention relates to an identification device of a source driver for identifying the source driver arranged on a glass substrate in a chip-on-glass packaged mode. The identification device comprises a comparing unit for a chip identification code of the source driver, a control signal contained a target code, a comparing chip identification code and a target identification code. When the comparing chip identification code and the target identification code coincide, a trigger signal is generated to start the source driver. A plurality of stitches of the source driver on the glass substrate are pulled highly and lowly in advance to get the chip identification code.

Description

The recognition device of the source electrode driver of chip-on-glass packaged liquid crystal display and method
Technical field
The present invention relates to a kind of LCD, particularly relate to a kind of encapsulation of employing glass flip chip (ChipOn Glass, LCD COG).
Background technology
In view of advantages such as light, thin and low radiation, LCD replaces the cathode ray tube (CRT) display gradually and becomes the main flow of computer screen and TV.Except being devoted to improve the display quality of LCD, as color, to brightness when etc., manufacturer also is devoted to improve its production technology with the speed production flow process and reduce production costs.
LCD system is with time schedule controller, source electrode driver and gate driver drive liquid crystal panel.Traditional time schedule controller, source electrode driver and gate drivers are welded in a printed circuit board (PCB) (Printed Circuit Board respectively, PCB), and then (Flexible PrintedCircuit Board FPC) electrically connects with liquid crystal panel to pass through flexible PCB.Therefore, traditional LCD needs three printed circuit board at least, and its production procedure is comparatively complicated.Along with development of technology, manufacturer has developed employing glass flip chip encapsulation (Chip On Glass, LCD COG) is used the simplification production procedure.
Fig. 1 is that tradition adopts glass flip chip encapsulation (Chip On Glass, LCD synoptic diagram COG).LCD 100 comprises panel 110, multiple source driver 112, at least one gate drivers 114, printed circuit board (PCB) 120 and flexible PCB 130.These source electrode drivers 112 are arranged on the glass substrate of panel 110 with gate drivers 114, electrically connect by corresponding flexible PCB 130 and printed circuit board (PCB) 120 respectively.Printed circuit board (PCB) 120 is provided with the time schedule controller (not shown), uses to receive image data and control signal, sends indivedual source electrode drivers 112 and gate drivers 114 to by these flexible PCBs 130 again after the processing.
Yet, tradition adopt the glass flip chip encapsulation (Chip On Glass, the needed flexible PCB of LCD COG) is more, for instance, promptly needs 11 at the example of Fig. 1, its production procedure still has necessity of simplification.In addition, except simplifying production procedure, the number of minimizing flexible PCB also can reduce the contact number between flexible PCB and liquid crystal panel, and then reduces the probability of fault.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of LCD that adopts the glass flip chip encapsulation, it can utilize the minority flexible PCB to realize the purpose of data transmission.
In addition, the present invention also proposes a kind of production method of grid control signal, uses the number of further minimizing flexible PCB.
In addition, cooperate LCD of the present invention, the present invention also proposes a kind of recognition method of source electrode driver.
In addition, cooperate LCD of the present invention, the present invention also proposes a kind of source electrode driver, uses image data and control signal that unidirectional or transmitted in both directions is received from time schedule controller.
In addition, cooperate LCD of the present invention, control signal can also be utilized the bag transmission technology, is integrated in minority or plain conductor, uses the lead number of further minimizing flexible PCB.
In addition, the present invention also proposes a kind of electric power management mechanism, uses the electrical source consumption that reduces LCD of the present invention.
According to purpose of the present invention, a kind of recognition device of source electrode driver has been proposed, adopt the mode of glass flip chip encapsulation to be arranged at one first source electrode driver on the glass substrate in order to identification, this glass substrate comprises one second source electrode driver, couple this first source electrode driver, this recognition device comprises: a comparer, control signal in order to the chip identification code that receives this first source electrode driver and the output of this second source electrode driver, wherein this control signal comprises a purpose identification code, this comparer is this chip identification code and this purpose identification code relatively, and produces a trigger pip to start this first source electrode driver when both are consistent.
According to another object of the present invention, a kind of recognition methods of source electrode driver is proposed, adopt the mode of glass flip chip encapsulation to be arranged at one first source electrode driver on the glass substrate in order to identification, this first source electrode driver has a chip identification code, this glass substrate comprises one second source electrode driver, couple this first source electrode driver, this recognition methods comprises: utilize the control signal of this first source electrode driver reception from this second source electrode driver, this control signal comprises a purpose identification code, relatively this chip identification code of this first source electrode driver and this purpose identification code, and when both are consistent, produce a trigger pip to start this first source electrode driver.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the LCD synoptic diagram that tradition adopts the glass flip chip bag.
Fig. 2 A shows a kind of LCD synoptic diagram that adopts the glass flip chip bag according to a preferred embodiment of the present invention.
Fig. 2 B shows the LCD synoptic diagram that adopts the glass flip chip bag according to the another kind of preferred embodiment of the present invention.
Fig. 3 is the control signal synoptic diagram of the driver of LCD.
Fig. 4 is the form synoptic diagram of control signal bag.
Fig. 5 A is a kind of source electrode driver calcspar according to preferred embodiment of the present invention.
Fig. 5 B is the waveform generator calcspar of Fig. 5 A source electrode driver.
Fig. 5 C is the calcspar of Fig. 5 B identity identification device.
Fig. 5 D is the waveform synoptic diagram that produces control signal POL.
Fig. 5 E is the waveform synoptic diagram that produces control signal TP.
Fig. 6 A be can power saving reducing-pitch thread data transmission method synoptic diagram.
Fig. 6 B be can power saving explosion type data transmission method synoptic diagram.
The reference numeral explanation
100,200: LCD
110,210: panel
112,212: source electrode driver (S/D)
114,214: gate drivers
120、220：PCB
130、230、232：FPC
225: time schedule controller
310: header field
312: control field
314: the data field position
410,412: receiver
413,415: transceiver
414,416: the control transceiver
424,426: data collector
420,421: waveform generator
422: bus switch
434: driver element
451: resolver
453: the identity identification device
456: comparing unit
460: signal generator
470: the initial setting device
Embodiment
Please refer to Fig. 2 A, it shows a kind of encapsulation of employing glass flip chip (Chip On Glass, LCD synoptic diagram COG) according to preferred embodiment of the present invention.LCD 200 comprises: and panel 210, multiple source driver (Source Driver, S/D) 212 (1)～211 (10), at least one gate drivers (Gate Driver) 214, printed circuit board (PCB) 220 and flexible PCB 230 and 232.These source electrode drivers 212 are arranged on the glass substrate of panel 210 with gate drivers 214.Printed circuit board (PCB) 220 is provided with time schedule controller 225, uses to receive image data and control signal, sends source electrode driver 212 (3) and 212 (8) respectively to by flexible PCB (FPC) 230 and 232 again after the processing.Source electrode driver 212 (3) and 212 (8) sends image data and the source control signal that receives to contiguous source electrode driver 212 (1), 212 (2), 212 (4), 212 (5) and 212 (6), 212 (7), 212 (9), 212 (10) by the lead on the glass substrate respectively again.Based on the source control signal that receives, a source electrode driver on the glass substrate, for example:, just can produce grid control signal G, use offering gate drivers 214 near the source electrode driver 212 (1) of gate drivers 214.Select source electrode driver 212 (1) near gate drivers 214 can effectively shorten conductor length with gate drivers 214, avoid unnecessary signal delay and distortion.But, in other embodiments, source electrode driver 212 (1) other source electrode driver in addition can also be used for producing grid control signal G.In the present embodiment, because the lead transmission signals that LCD 200 adopts on the glass substrate, do not need to be provided with a plurality of flexible PCBs with corresponding each source electrode driver and gate drivers, so LCD 200 needed flexible PCB numbers can reduce greatly.
In the present embodiment, source electrode driver 212 has first pattern and second pattern.Source electrode driver 212 (3) and 212 (8) is set at first pattern, can reach left simultaneously and transfer data to adjacent source electrode driver 212 to the right two-wayly, other source electrode driver 212 (1), 212 (2), 212 (4)～212 (7), 212 (9) and 212 (10) is set at second pattern, only can the single direction transmission.The source electrode driver 212 (3) of first pattern and 212 (8) can be respectively receives two group image data and control signals by time schedule controller 225, and the image data that receives and control signal reached left respectively transfers to other source electrode driver to the right.The source electrode driver 212 (1), 212 (2), 212 (4)～212 (7), 212 (9) and 212 (10) of second pattern is only receiving image data and the control signal that the left side or the right source electrode driver transmit, can't be directly and time schedule controller 225 electric connections.In the present embodiment, because LCD 200 is the large scale liquid crystal display, with 10 source electrode drivers is example, in view of signal delay and the distortion that the lead dead resistance on glass substrate and electric capacity cause, present embodiment can two flexible PCB 230 and 232 transmission data.Yet the actual design adjustment of the number visible liquid crystal display of flexible PCB is not limited to two flexible PCBs, as long as signal delay and distortion that lead dead resistance on glass substrate and electric capacity cause are maintained at tolerance interval.
In the present embodiment, the source electrode driver 212 of liquid crystal panel can be divided into 212 (6)～212 (10) two groups of left side source electrode driver 212 (1)～212 (5) and the right source electrode drivers, two 230,232 of flexible PCBs are electrically connected at the central source electrode driver 212 (3), 212 (8) of two groups of source electrode drivers respectively, so, just effective minimization of the signal delay that causes of lead dead resistance on glass substrate and electric capacity and distortion.In like manner, actual design based on LCD, the source electrode driver 212 of liquid crystal panel can also be divided into more than three groups, and the flexible PCB more than three can also be electrically connected at respectively in the scope of respectively organizing source electrode driver, as long as signal delay and distortion that lead dead resistance on glass substrate and electric capacity cause are maintained at tolerance interval.
Fig. 2 B is the encapsulation of employing glass flip chip (Chip On Glass, LCD 250 synoptic diagram COG) according to another preferred embodiment of the present invention.Different being in the right-hand member of panel 210 of the LCD 200 among LCD 250 and Fig. 2 A also has another gate drivers 216, drives with the two ends from each bar scanning linear.Remaining component Fig. 2 A is identical, repeats no more in this.
Fig. 3 is the control signal synoptic diagram of the driver of LCD.Control signal can be divided into grid control signal G and source control signal S.For instance, grid control signal G comprise gate drivers start signal STV (Gate Driver Start Signal) with the beginning of representing a picture, gate clock signal CPV (Gate Clock Signal) with the activation gate line, with the activation time of gate drivers output enable signal OEV (Gate Driver Output Enable Signal) with the definition gate line.In addition, for instance, source control signal S comprise source electrode driver start signal STH (Source DriverStart Signal) so that source electrode driver 212 begin prepare to show a horizontal line, data actuating signal DE (Data Enable Signal) to begin to receive data, load signal TP (Load Signal) so that source electrode driver 212 outputting drive voltages to data line, and polarity control signal POL with control reversal of poles.
When source electrode driver start signal STH activation, source electrode driver 212 just begins to prepare to receive data.Behind a period td1, data actuating signal DE promptly transfers high level to, and time schedule controller 225 just begins the image output data and gives source electrode driver 212.Source electrode driver 212 is used the output voltage that produces opposed polarity according to polarity control signal POL decision polarity.Then, load signal TP activation is so that source electrode driver 212 begins outputting drive voltages to panel 210.
In available liquid crystal display 100, control signal is to issue each source electrode driver 112 and gate drivers 114 by time schedule controller.The transmission mode of existing control signal is to use control signal of a lead transmission, therefore needs many leads to transmit these control signals.And because time schedule controller has dead resistance and stray capacitance to the lead of each source electrode driver 112 and gate drivers 114, control signal also is easy to generate delay and influences display quality.
In the present embodiment, time schedule controller 225 is integrated into control signal stream C with these control signals, and is transferred to source electrode driver 212 with a lead.For instance, control signal stream C can use the bag host-host protocol respectively with a plurality of control signal boil down tos control signal bag independently, uses the dependent event of each control signal of expression and is transmitted on the same lead.Time schedule controller 225 can utilize purpose identification code signal, specifies the control signal bag that transmits should give which source electrode driver 212.For instance, purpose identification code signal can also be contained in the control signal bag, and using provides each source electrode driver 212 acquisitions and comparison.Behind the control signal bag of receiving control signal stream C, source electrode driver 212 just can solve the control signal that needs voluntarily.So, transmitting the required lead of control signal just can significantly reduce.
Because whether source electrode driver 212 needs control signal bag that identification receives to oneself, therefore, each source electrode driver also needs built-in identification code signal, uses with the purpose identification code signal of time schedule controller 225 and compares.
[host-host protocol of control signal stream]
The transmission mode of existing control signal is that lead of indivedual uses is to control signal to source electrode driver and/or gate drivers from one of time schedule controller transmission, source electrode driver and gate drivers need a plurality of control signals respectively, therefore time schedule controller is a lot of to the lead number of each source electrode driver and gate drivers, make that the circuit of flexible PCB (FPC) is more, increase cost and instability.In addition, dead resistance that causes owing to lead is long and stray capacitance also can make control signal produce delay and distortion influences display quality.
In the present embodiment, time schedule controller 225 only transmits control signal stream C by a lead and gives source electrode driver 212.Utilize the bag transmission technology, for instance, control signal stream C can comprise a plurality of control signal bags, and the content of each control signal bag can be represented (pull high) incident of drawing high of corresponding control signal or drag down (pull low) incident.After source electrode driver 212 was received the control signal bag, corresponding control signal just can be drawn high or be dragged down, and used to produce various required control signals.
Fig. 4 is the form synoptic diagram of control signal bag.A control signal bag comprises header field 310 and control order, and wherein, the control order comprises control field 312 and data field position 314.Header field 310 record one predetermined patterns (pattern), initial in order to a control signal bag of identification, predetermined pattern is for example represented with 0x11111.Control field 312 is in order to the kind of recording events.Kind of event comprises signal STH incident, signal TP incident at least, draws high incident, drags down incident and initial setting incident.Data field position 314 is in order to write down the parameter of this incident.
In the present embodiment, having 16 positions with each control signal bag is example, if adopt dual edge sampling (dual edge sampling) to receive bag, the time for reading of each control signal bag is 8 clocks, that is to say, the high level that the control signal that incident is drawn high in utilization and the incident that drags down produces needs to have 8 clocks is at least held time, and promptly can utilize the incident of drawing high and drag down the incident generation as control signal POL, CPV, STV, OEV.In addition, high level is held time less than the control signal of 8 clocks, as control signal STH and TP, then can after difference received signal STH incident and signal TP incident signal level be drawn high, and promptly transfers low level voluntarily to through scheduled time slot td2 and tw1 respectively.The present invention is not limited to use the dual edge sampling, also can use the mode of rising edge or falling edge sampling to receive bag in addition, repeats no more in this.
Control signal Bao Eryan with control field 312 tracer signal STH incidents, it is in order to the control signal STH of each source electrode driver 212 (1)～212 (10) of activation, and 414 of its data field positions are the purpose identification code signals of the purpose source electrode driver 212 of this control signal bag of expression.For instance, if the chip identification coded signal of source electrode driver 212 (1)～212 (10) is respectively 0x0001～0x1010, after source electrode driver 212 (1) received that its data field position 414 of this control signal Bao Bingcong learns that the purpose identification code signal (ID) of purpose source electrode driver is 0x0001, the source electrode driver 212 (1) with identical chips identification code just can produce signal STH voluntarily and come display horizontal line to begin the preparing reception data.After control signal STH draws high, through just being converted to low level voluntarily behind the scheduled time slot td2.
In addition, because signal TP and CPV draw high simultaneously, control signal Bao Eryan with control field 312 tracer signal TP incidents, it is in order to activation control signal TP and CPV, wherein, control signal TP is that low level, control signal CPV then need to receive just can draw behind the control signal bag of the incident that drags down of record CPV signal and is low level through just drawing automatically behind the scheduled time slot tw1.
Signal POL, STV and OEV etc. can be individually draw high the control signal bag of incident and record by a record and drag down the control signal bag of incident and produce.Draw high the control signal Bao Eryan of incident with control field 312 record, the signal that its data field position 314 desires to draw high in order to record is as signal POL, STV or OEV.Drag down the control signal Bao Eryan of incident with control field 312 record, the signal that its data field position 314 desires to drag down in order to record is as signal POL, STV or OEV.
With the control signal Bao Eryan of control field 312 record initial setting incidents, it is in order to set various initial set value, for example, and thrust output of source electrode driver 212 or the like.Control signal Bao Shangke writes down the incident of other kind, illustrates no longer one by one in this.
In the present embodiment, utilize the control signal of control signal stream C transmission packetize, lead of minimum needs can transmit.Therefore, transmit all lead numbers that control signal to each source electrode driver 212 from time schedule controller 225 and can greatly reduce, and then simplify the Butut complexity of circuit and increase product stability.In addition, cooperate lead frequency range and actual design, control signal stream C can also optionally only integrate a part of control signal and independent transmission another part control signal.In this case, though full control signal may not be certain all to be integrated in a lead, the lead number still can reduce.
[source electrode driver]
Fig. 5 A is a kind of source electrode driver calcspar according to preferred embodiment of the present invention.Source electrode driver 212 comprises: receiver 410,412, transceiver 413,415, bus switch 422, waveform generator 420,421 and driver element 434.Transceiver 413 comprises: control transceiver 414 and data collector 424, transceiver 415 comprises: control transceiver 416 and data collector 426.
Bus switch 422 comprises two switch SW 1 and SW2.Work as source electrode driver, as 212 (3) and 212 (8), when being in first pattern, its bus switch 422 can be with switch SW 1 and SW2 open circuit, so that control transceiver 414 opens circuit with control transceiver 416, and data collector 424 and data collector 426 are opened circuit, so the control signal stream C1 that receiver 410 receives exports control transceiver 414 to, image data D1 exports data collector 424 to; And the control signal stream C2 that receiver 412 receives exports control transceiver 416 to, and image data D2 exports data collector 426 to.
Work as source electrode driver, as 212 (1)～212 (2), 212 (4)～212 (7), 212 (9)～212 (10), when being in second pattern, receiver 410 and 412 is forbidden energy (disabled), bus switch 422 is closed circuit with switch SW 1 and SW2, so that transceiver 413 and transceiver 415 electric connections, that is: data collector 424 and data collector 426 electrically connect, and control transceiver 414 and control transceiver 416 electric connections.So, control signal stream and the image data received of the left side or the right control transceiver 414,416 and data collector 424,426 just can send next source electrode driver to according to assigned direction.
420,421 of waveform generators do not receive control signal stream C1, C2, and produce source control signal according to this, as STH (1), STH (2), POL (1), POL (2), TP (1), TP (2) etc., in view of the above, grid control signal G, just can produce as CPV (1), CPV (2), STV (1), STV (2), OEV (1), OEV (2) etc., wherein, grid control signal G can be produced by a selected source electrode driver.With the LCD among Fig. 2 A 200 is example, a source electrode driver 212 on the glass substrate, for example be near the source electrode driver 212 (1) of gate drivers 214, can be used for producing grid control signal G, source electrode driver 212 (1) other source electrode driver in addition then can not produce grid control signal G.In addition, with the LCD among Fig. 2 B 250 is example, two source electrode drivers on the glass substrate, for example be near the source electrode driver 212 (1) and 212 (10) of grid 214 and 216, can be used for producing grid control signal G respectively to gate drivers 214 and 216, source electrode driver 212 (1) and 212 (10) other source electrode driver in addition then can not produce grid control signal G.
After driver element 434 is received control signal STH, promptly begin to lock image data D, then image data D is converted to the corresponding simulating driving voltage according to polar signal POL, after receiving load signal TP, driving voltage is sent to panel 210 then.
With source electrode driver 212 (3) is example, and it is to be in first pattern, and waveform generator 420,421 can start simultaneously, uses to receive control signal stream C1, C2 respectively, and produces source control signal and the grid control signal that is used for transmitting image data D1, D2.At this moment, control signal stream C1, C2 and image data D1 and D2 are independent each other.In addition, be example with source electrode driver 212 (2) or 212 (4), it is in second pattern, and both can close or omit one waveform generator 420,421.At this moment, because control signal stream C1, C2 and image data D1 and D2 are communicated with each other, no matter control signal stream C is received by waveform generator 420 or 421, and source electrode driver 212 (2) or 212 (4) all can correctly produce source control signal, and produce correct grid control signal in view of the above.In addition, in second pattern, control signal stream C1, C2 can also be set at identical, and one of them waveform generator is not closed or omitted to necessity.
Fig. 5 B is the calcspar of Fig. 5 A waveform generator.Waveform generator comprises: resolver 451, identity identification device 453, signal generator 460 and initial setting device 470.Resolver 451 in order to receive control signal stream C, use parse each control signal bag after, and give identity identification device 453, signal generator 460 or initial setting device 470 according to its control order branch.Having the identity identification incident, is signal STH incident in this example, the control order of control signal bag send identity identification device 453 to; Having control signal draws high or drags down the control order of the control signal bag of incident and send signal generator 460 to; Control order with control signal bag of initial setting incident sends initial setting device 470 to.
Fig. 5 C is the calcspar of Fig. 5 B identity identification device.Identity identification device 453 comprises comparing unit 456.The chip identification code Idp of each source electrode driver can for example be via the stitch of source electrode driver 212 on glass substrate via external setting-up, respectively it is drawn high or is pulled low to particular level and sets.Each source electrode driver 212 has different chip identification code IDp.The purpose identification code IDt that comparing unit 456 can be compared chip identification code IDp and solve from control signal stream C, and trigger control signal STH when both are consistent, wherein, the high level of the signal STH td2 that holds time can utilize comparing unit 456 to preestablish.
Shown in Fig. 5 B, signal generator 460 can be drawn high corresponding control signal after receiving the control order of control signal bag of the incident of drawing high, and the high level electricity of control signal continues constant, receives the control order of the control signal bag of the incident of dragging down up to signal generator 460.Fig. 5 D is the waveform synoptic diagram that produces control signal POL.Behind the control order of the control signal bag of the incident of the drawing high H that receives POL, be about to produce the signal PH of high level; Behind the control order of the control signal bag of the incident that the drags down L that receives POL, promptly produce low level signal PL; The coupling of signal PH and PL is signal POL.Other control signal also is to produce according to the identical practice as CPV, STV, OEV.
In addition, in preferred embodiment of the present invention, when the high level of control signal is held time less than 8 clocks, as control signal TP, since each control signal bag be read as 8 clocks, utilize the incident of drawing high and the incident of dragging down to produce the method for control signal and inapplicable.Fig. 5 E is the waveform synoptic diagram that produces signal TP.When receive the TP signal draw high incident after, produce the signal TH of high level; Then begin counting, promptly produce low level signal TL up to counting to preset period of time tw1; The coupling of signal TH and TL is signal TP.
Grid control signal still can as STH or TP, produce according to source control signal except drawing high incident according to above-mentioned use and dragging down the incident generation.Please refer to Fig. 3.For instance, produce in the example of grid control signal at foundation STH, the method that produces signal CPV is as follows: after the signal STH of source electrode driver (1) activation, its counter just starts and begins counting, draw high when being about to signal CPV, be about to signal CPV through period tw4 again and drag down through period td6.The method that produces signal STV is as follows: after the signal STH of source electrode driver (1) activation, its counter just starts and begins counting, draws high when being about to signal STV through period td7, is about to signal STV through period tw5 again and drags down.The method that produces signal OEV is as follows: after the signal STH of source electrode driver (1) activation, its counter just starts and begins counting, draws high when being about to signal OEV through period td8, is about to signal OEV through period tw6 again and drags down.
After initial setting device 470 receives the control order of control signal bag of initial setting incident, promptly export the DC value according to this to set corresponding parameters.
Because source electrode driver can produce source control signal voluntarily, do not need to produce by clock generator after pass to each source electrode driver by lead as the existing practice, therefore can avoid the transmission attenuation of source control signal.
In addition, source electrode driver more can produce grid control signal and directly pass to gate drivers, not needing needs to draw very long lead to gate drivers by time schedule controller as the existing practice, therefore can save the lead of time schedule controller to gate drivers, and promotes the quality of signal.
[power management]
Fig. 6 A be can power saving reducing-pitch thread data transmission method synoptic diagram.In the reducing-pitch thread data transmission method, image data is to pass to more long-range source electrode driver 212 earlier, and then gives nearer source electrode driver 212 gradually.Shown in the 2nd figure, following explanation will be an example with the source electrode driver 212 (1)～212 (5) on the LCD left side.At first, in step 610, time schedule controller 225 passes to image data from flexible PCB 230 source electrode driver 212 (1) and 212 (5) far away, and source electrode driver 212 (1) and 212 (5) promptly enters battery saving mode then, for example with the power-off of its data collector 424 and 426.Then, in step 612, time schedule controller 225 is passed to source electrode driver 212 (2) and 212 (4) with image data, and source electrode driver 212 (2) and 212 (4) promptly enters battery saving mode then.Then, in step 614, time schedule controller 225 is passed to source electrode driver 212 (3) with image data, and source electrode driver 212 (3) promptly enters battery saving mode then.Then, each source electrode driver 212 can be received load signal TP, and this moment, each source electrode driver 212 promptly was waken up to prepare to begin to drive panel 210.The transmission method of the source electrode driver 212 (6)～212 (10) of right one side of something is identical with said method, repeats no more in this.
Fig. 6 B be can power saving explosion type data transmission method synoptic diagram.The explosion type data transmission method that is to say that image data is a source electrode driver 212 of giving nearer end earlier, and then gives source electrode driver 212 far away gradually.Shown in the 2nd figure, following explanation will be an example with the half of source electrode driver 212 (1)～212 (5) in a LCD left side.When just beginning, all source electrode drivers 212 enter battery saving mode.In step 622, time schedule controller 225 wakes up from the nearest source electrode driver 212 (3) of flexible PCB 230, and transmits image data D.Then, in step 622, source electrode driver 212 (3) wake source drivers 212 (2) and 212 (4), time schedule controller 225 is passed to source electrode driver 212 (2) and 212 (4) with image data D then.Then, in step 624, source electrode driver 212 (2) and 212 (4) is wake source driver 212 (1) and 212 (5) respectively, and time schedule controller 225 is passed to source electrode driver 212 (1) and 212 (5) with image data D then.The transmission method of the source electrode driver 212 (6)～212 (10) of right one side of something is identical with said method, repeats no more in this.
In the above-mentioned battery saving mode, at least can be with the power-off of driver element 434, data collector 424 and 426.Because data collector 424 and 426 is in order to the transmission image data, its amplitude of oscillation is big and frequency is high, institute's power consumption is very big, therefore can reduce the unnecessary data transmission by above-mentioned reducing-pitch thread transmission method or explosion type transmission method, to improve the service efficiency of power supply effectively.In addition, control transceiver 414 and 416 can not be closed power supply with waveform generator, still can receive and dispatch control signal stream and moves according to this to guarantee source electrode driver 212.
Above-mentioned reducing-pitch thread and explosion type data transmission method can also mix use, for example are that source electrode driver 212 (1), 212 (2) and 212 (3) utilizes reducing-pitch thread, and source electrode driver 212 (4) and 212 (5) utilizes explosion type, otherwise perhaps.Those of ordinary skill in the art can do variation according to spirit of the present invention, no longer describes in detail in this.
In sum; though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can be used for a variety of modifications and variations under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with claim of the present invention.

Claims (8)

1. the recognition device of a source electrode driver, adopt the mode of glass flip chip encapsulation to be arranged at one first source electrode driver on the glass substrate in order to identification, this glass substrate comprises one second source electrode driver, couples this first source electrode driver, and this recognition device comprises:
One comparer, control signal in order to the chip identification code that receives this first source electrode driver and the output of this second source electrode driver, wherein this control signal comprises a purpose identification code, this comparer is this chip identification code and this purpose identification code relatively, and produces a trigger pip to start this first source electrode driver when both are consistent.
2. recognition device as claimed in claim 1, wherein, this chip identification code be via drag down in advance or draw high this first source electrode driver on this glass substrate a plurality of stitch and get.
3. recognition device as claimed in claim 1, wherein, this trigger pip is an one source pole driver start signal (STH).
4. recognition device as claimed in claim 1, wherein, the high level of this trigger pip is held time to preestablishing.
5. the recognition methods of a source electrode driver, adopt the mode of glass flip chip encapsulation to be arranged at one first source electrode driver on the glass substrate in order to identification, this first source electrode driver has a chip identification code, this glass substrate comprises one second source electrode driver, couple this first source electrode driver, this recognition methods comprises:
Utilize the control signal of this first source electrode driver reception from this second source electrode driver, this control signal comprises a purpose identification code, relatively this chip identification code of this first source electrode driver and this purpose identification code, and when both are consistent, produce a trigger pip to start this first source electrode driver.
6. recognition methods as claimed in claim 5, wherein, this chip identification code be drag down in advance or draw high this first source electrode driver on this glass substrate a plurality of stitch and get.
7. recognition methods as claimed in claim 5, wherein, this trigger pip is an one source pole driver start signal (STH).
8. recognition methods as claimed in claim 5, wherein, the high level of this trigger pip is held time to preestablishing.
CNB2005100628242A 2005-03-31 2005-03-31 Recognition apparatus and method for source driver of chip-on-glass packaged liquid crystal display Expired - Fee Related CN100433118C (en)

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EP06005205A EP1708154A3 (en) 2005-03-31 2006-03-14 Identifier of source driver of chip-on-glass liquid crystal display and identifying method thereof

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US5663745A (en) * 1993-05-13 1997-09-02 Casio Computer Co., Ltd. Display driving device
CN1299982A (en) * 1999-12-10 2001-06-20 国际商业机器公司 Liquid-crystal display device, liquid-crystal controller and video-signal transmission method
US6335720B1 (en) * 1995-04-27 2002-01-01 Canon Kabushiki Kaisha Data transfer method, display driving circuit using the method, and image display apparatus
CN1335590A (en) * 2000-07-24 2002-02-13 夏普株式会社 Multiple column electrode drive circuit and display equipment containing the same

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US5663745A (en) * 1993-05-13 1997-09-02 Casio Computer Co., Ltd. Display driving device
US6335720B1 (en) * 1995-04-27 2002-01-01 Canon Kabushiki Kaisha Data transfer method, display driving circuit using the method, and image display apparatus
CN1299982A (en) * 1999-12-10 2001-06-20 国际商业机器公司 Liquid-crystal display device, liquid-crystal controller and video-signal transmission method
CN1335590A (en) * 2000-07-24 2002-02-13 夏普株式会社 Multiple column electrode drive circuit and display equipment containing the same

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