CN101676977B - Brightness regulation device, method and electronic system comprising same - Google Patents
Brightness regulation device, method and electronic system comprising same Download PDFInfo
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- CN101676977B CN101676977B CN200810211338.6A CN200810211338A CN101676977B CN 101676977 B CN101676977 B CN 101676977B CN 200810211338 A CN200810211338 A CN 200810211338A CN 101676977 B CN101676977 B CN 101676977B
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Abstract
The invention provides a brightness regulation device, a method and an electronic system comprising the same. According to a red input signal, a green input signal and a blue input signal, the brightness regulation device regulates the red input signal, the green input signal and the blue input signal dynamically and outputs the regulated results to a panel. The panel then displays a corresponding picture according to the received signals.
Description
Technical field
The present invention relates to a kind of adjusting gear, particularly a kind of brightness adjusting device that is applicable to panel.
Background technology
Due to crt display unit, to have image quality good and cheap, therefore be adopted to the display of TV and computing machine always.But, along with scientific and technological progress, the flat-panel screens that exploitation makes new advances successively.The major advantage of flat-panel screens is, in the time having large-sized display panel, therefore the cumulative volume of flat-panel screens can't have the change showing.
In flat-panel screens, power saving is most important considering.Power consumption is saved in the brightness that the way in past comprises a newly-increased high efficiency white pixel and reduces rgb pixels, but shortcoming is that color saturation is declined.
Another is common, and to do rule be to use complex calculations formulas, and the data that need to lean on picture memory (framememory) to store last picture, calculate accordingly may power saving mode, but thereby increase the cost of element.
Summary of the invention
The present invention proposes a kind of brightness adjusting device, produces an image and exports to a panel.Panel is exported according to image, shows corresponding image.Image output comprises, a red output signal, a green output signal and a blue output signal.Brightness adjusting device of the present invention, comprising: a judging unit, a computing unit and a D/A conversion unit.Judging unit, according to a red input signal, a green input signal and a blue input signal, defines a main input signal.Computing unit, according to main input signal, is adjusted red input signal, green input signal and blue input signal.D/A conversion unit converts red input signal, green input signal and blue input signal after adjusting to red output signal, green output signal and blue output signal.
The present invention separately provides a kind of electronic system, comprises a panel and a brightness adjusting device.Panel is exported according to an image, shows corresponding image.Image output comprises, a red output signal, a green output signal and a blue output signal.Brightness adjusting device, comprising: a judging unit, a computing unit and a D/A conversion unit.Judging unit, according to a red input signal, a green input signal and a blue input signal, defines a main input signal.Computing unit, according to main input signal, is adjusted red input signal, green input signal and blue input signal.D/A conversion unit converts red input signal, green input signal and blue input signal after adjusting to red output signal, green output signal and blue output signal.
The present invention also provides a kind of luminance regulating method, comprises and receives a red input signal, a green input signal and a blue input signal; According in this redness input signal, this green input signal and this blueness input signal, define a main input signal; According to this main input signal, adjust this redness input signal, this green input signal and this blueness input signal; And convert this redness input signal, this green input signal and this blueness input signal after adjusting to this redness output signal, this green output signal and this blueness output signal, wherein this redness input signal, this green input signal and this blueness input signal are digital signal, and this redness output signal, this green output signal and this blueness output signal are simulating signal.
For above and other object of the present invention, feature and advantage can be become apparent, cited below particularly go out preferred embodiment, and coordinate accompanying drawing, be described in detail below:
Brief description of the drawings
Fig. 1 is the schematic diagram of electronic system of the present invention.
Fig. 2 is that one of brightness adjusting device of the present invention may embodiment.
Other that Fig. 3,4,6 is brightness adjusting device of the present invention may embodiment.
Fig. 5 shows the relation of GTG value and resize ratio.
Fig. 7 is that one of Date Conversion Unit of the present invention may embodiment.
Fig. 8 is that one of luminance regulating method of the present invention may embodiment.
[symbol description]
100: electronic system;
110: panel;
120: brightness adjusting device;
210: judging unit;
220: computing unit;
230: D/A conversion unit;
240: Date Conversion Unit;
410,610: memory cell;
420: detecting unit;
51: the relation curve between red input signal R_in and resize ratio;
52: the relation curve between green input signal G_in and resize ratio;
53: the relation curve between blue input signal B_in and resize ratio;
710: GTG/luminance transducer;
720,740: processor;
730: storer;
750: brightness/gray scale converter;
S810～S840: step.
Embodiment
Fig. 1 is the schematic diagram of electronic system of the present invention.Electronic system 100 can be a personal digital assistant (PDA), a mobile phone (cellular phone), a digital camera, a TV, a GPS (GPS), a vehicle display, a display, a digital frame (digital photoframe), a mobile computer or a desktop PC for aviation.As shown in the figure, electronic system 100 comprises panel 110 and brightness adjusting device 120.Panel 110 has multiple pixel cells, and according to image output Sout, shows corresponding image.
In a possibility embodiment, in the time that each pixel cell of panel 110 has three pixels, image output Sout comprises, red output signal R_out, green output signal G_out and blue output signal B_out.In other embodiments, in the time that each pixel cell has four pixels, image output Sout also comprises white output signal W_out.Because the structure of pixel cell is known very well by this area personage, therefore repeat no more.
Fig. 2 is that one of brightness adjusting device of the present invention may embodiment.As shown in the figure, brightness adjusting device 120 comprises, judging unit 210, computing unit 220, D/A conversion unit 230 and Date Conversion Unit 240.Judging unit 210, according to red input signal R_in, green input signal G_in and blue input signal B_in, defines a main input signal Sm.
In a possibility embodiment, judging unit 210 is with the maximum in red input signal R_in, green input signal G_in and blue input signal B_in, as main input signal Sm.In another possibility embodiment, judging unit 210 can be according to one pre-conditioned (can be relevant with the characteristic of panel), process red input signal R_in, green input signal G_in and blue input signal B_in, then using the maximum in the red input signal R_in processing, green input signal G_in and blue input signal B_in as main input signal Sm.
Computing unit 220, according to main input signal Sm, is adjusted red input signal R_in, green input signal G_in and blue input signal B_in.Red input signal after adjustment, green input signal and this blueness input signal represent with symbol Ra_in, Ga_in and Ba_in respectively.In the present embodiment, computing unit 220, according to following formula, is adjusted red input signal R_in, green input signal G_in and blue input signal B_in.
TR＝[1-F*(Sm/Sbit)]；
Wherein, TR is resize ratio, and F is preset value (as the arbitrary numerical value in 0～1), and Sm is the maximum gray value in input signal R_in, G_in, B_in, and Sbit is total GTG quantity.
For example, if when the figure place of input signal is 8, total GTG quantity Sbit is 255.Suppose, the GTG value of red input signal R_in, green input signal G_in and blue input signal B_in is respectively 100,150 and 200, and preset value F is 0.2.Can learn according to the GTG value of red input signal R_in, green input signal G_in and blue input signal B_in, maximum gray value Sm is 200.Bring known parameter into above formula, just can try to achieve resize ratio TR is 0.84.Therefore, the GTG value of the red input signal after adjustment be 84 (100*0.84), the GTG value of green input signal after adjusting be 126 (150*0.84) and adjust after the GTG value of blue input signal be 168 (200*0.84).
In other embodiments, computing unit 220 can be adjusted red input signal R_in, green input signal G_in and blue input signal B_in according to alternate manner.Fig. 5 is other adjustment mode of computing unit.Curve 51 is the relation between red input signal R_in and resize ratio.Curve 52 is the relation between green input signal G_in and resize ratio.Curve 53 is the relation between blue input signal B_in and resize ratio.In the present embodiment, computing unit 220, according to curve 51,52 and 53, is adjusted respectively red input signal R_in, green input signal G_in and blue input signal B_in.
D/A conversion unit 230 converts signal Ra_in, Ga_in and Ba_in to red output signal R_out, green output signal G_out and blue output signal B_out.D/A conversion unit 230 is digital analog converter (DAC).
In the present embodiment, brightness adjusting device 120 also comprises Date Conversion Unit 240.Date Conversion Unit 240, according to signal Ra_in, Ga_in and Ba_in, produces a white signal W.D/A conversion unit 230 converts white signal W to one white output signal W_out again to panel 110.In other embodiments, can omitted data converting unit 240.Therefore, D/A conversion unit 230 only output red output signal R_out, green output signal G_out and blue output signal B_out to panel 110.
Fig. 3 is another possibility embodiment of brightness adjusting device of the present invention.Fig. 3 similar diagram 2, difference is, the Date Conversion Unit 240 of Fig. 3, according to red input signal R_in, green input signal G_in and blue input signal B_in, produces a white signal W.
In the present embodiment, computing unit 220, according to main input signal Sm, is adjusted red input signal R_in, green input signal G_in, blue input signal B_in and white signal W.Red input signal after adjustment, green input signal, blue input signal and white signal represent with symbol Ra_in, Ga_in, Ba_in and Wa respectively.
D/A conversion unit 230 converts signal Ra_in, Ga_in, Ba_in and Wa after adjusting to red output signal R_out, green output signal G_out, blue output signal B_out and white output signal W_out, and exports the result after conversion to panel 110.
Fig. 4 is another possibility embodiment of brightness adjusting device of the present invention.Fig. 4 is similar in appearance to Fig. 3, and difference is, Fig. 4 has memory cell 410 and detecting unit 420.In other embodiments, can omit memory cell 410 or detecting unit 420.Below by the operating principle of explanation memory cell 410 and detecting unit 420.
In the present embodiment, memory cell 410 is stored one pre-conditioned (as the characteristic of panel).It is pre-conditioned that judging unit 210 is stored according to memory cell 410, process red input signal R_in, green input signal G_in and blue input signal B_in, and by the maximum in the red input signal of processing, green input signal and blue input signal, as main input signal Sm.
For example, suppose, the GTG value of red input signal R_in, green input signal G_in and blue input signal B_in is respectively 100,50 and 30.After the processing of judging unit 210, the GTG value of the red input signal of processing, green input signal and blue input signal may be 30,40 and 60.Because the GTG value of the blue input signal of processing is the maximum, therefore main input signal Sm is 60.
Generally speaking, panel (as shown in Figure 1) 110 has multiple light-emitting components (as Organic Light Emitting Diode Organic Light-Emitting Diode; OLED).In a possibility embodiment, the pre-conditioned characteristic (as efficiency or life-span) for light-emitting component that memory cell 410 is stored.In other embodiments, pre-conditionedly determined according to the characteristics of luminescence of panel by deviser.
As shown in Figure 4, the pre-conditioned and main input signal Sm that computing unit 220 also can be stored according to memory cell 410, adjusts red input signal R_in, green input signal G_in and blue input signal B_in.One may embodiment in, 220 foundations of computing unit pre-conditioned is same or different from the pre-conditioned of 210 foundations of judging unit.In other embodiments, only have pre-conditioned that judging unit 210 or computing unit 220 can reference memory cell 410 store.
Detecting unit 420 is in order to the intensity of testing environment light.Therefore, computing unit 220 also can be according to the intensity of ambient light, adjusts red input signal R_in, green input signal G_in and blue input signal B_in.In addition, computing unit 220 also can be according to user's setting Suse, adjusts red input signal R_in, green input signal G_in and blue input signal B_in.In the present embodiment, that computing unit 220 is stored according to memory cell 410 is pre-conditioned, the testing result of detecting unit 420 and user's setting Suse, adjusts red input signal R_in, green input signal G_in and blue input signal B_in.In other embodiments, that only store is pre-conditioned, or part in the testing result of detecting unit 420 and user's setting Suse by reference memory cell 410 for computing unit 220.
Fig. 6 is another possibility embodiment of brightness adjusting device of the present invention.Fig. 6 is similar in appearance to Fig. 3, and difference is, the brightness adjusting device of Fig. 6 has memory cell 610.The data that memory cell 610 is added up come from red input signal R_in, green input signal G_in and blue input signal B_in.In other embodiments, the data that memory cell 610 is added up are only relevant with in red input signal R_in, green input signal G_in and blue input signal B_in one or part.
Computing unit 220 according to the data (GTG value or brightness value) that mainly input signal Sm and computing unit 610 are added up, is adjusted red input signal R_in, green input signal G_in, blue input signal B_in and white signal W again.For example, if when the data that computing unit 610 is added up are greater than preset value, the adjustment degree of computing unit 220 is larger.If when the data that computing unit 610 is added up are less than preset value, the adjustment degree of computing unit 220 is less.
Fig. 7 is that one of Date Conversion Unit of the present invention may embodiment.As shown in the figure, GTG/luminance transducer 710 converts red input signal R_in, green input signal G_in, blue input signal B_in to luminance signal LR1, LG1 and LB1.Processor 720, according to luminance signal LR1, LG1 and LB1, defines and exports applicable white brightness signal LW.In the present embodiment, the data that processor 720 is stored according to storer 730, define white brightness signal LW.The data that storer 730 is stored can be relevant with the characteristic of color coordinate or panel.Processor 740, according to white brightness signal LW, is adjusted luminance signal LR1, LG1 and LB1, in order to produce luminance signal LR2, LG2 and LB2.Luminance signal LR2, LG2, LB2 and LW are changed into GTG signal by brightness/gray scale converter 750.
Fig. 8 is that one of luminance regulating method of the present invention may embodiment.Luminance regulating method of the present invention produces an image and exports to a panel.Panel is exported according to image, shows corresponding image.In a possibility embodiment, image output comprises, a red output signal, a green output signal and a blue output signal.In other possibility embodiment, image output also comprises a white output signal.
First, receive a red input signal, a green input signal and a blue input signal (step S810).In the present embodiment, red input signal, green input signal and blue input signal are GTG value.
Then, in red input signal, green input signal and blue input signal, definition one main input signal (step S820).In one embodiment, main input signal is the maximum in red input signal, green input signal and blue input signal.In another embodiment, can be first process red input signal, green input signal and blue input signal according to one pre-conditioned (relevant with the characteristic of the light-emitting component of panel), and then using the maximum of the red input signal of processing, green input signal and blue input signal as main input signal.
According to main input signal, adjust red input signal, green input signal and blue input signal (step S830).In a possibility embodiment, can, according to a pre-conditioned and main input signal, adjust red input signal, green input signal and blue input signal.Pre-conditioned can be relevant with the intensity of the characteristic of the light-emitting component of panel, ambient light, user's setting.In other embodiments, pre-conditioned relevant with red input signal, green input signal and blue input signal.
In addition, if when image output also comprises a white output signal,, before step S830, need first to produce a white signal according to red input signal, green input signal and blue input signal.And then according to main input signal, adjust red input signal, green input signal, blue input signal and white signal.In addition, can be before or after step S820 according to the step of red input signal, green input signal and blue input signal generation white signal.
Finally, adjusted red input signal, green input signal and blue input signal are converted to red output signal, green output signal and blue output signal (step S840).In the present embodiment, red input signal, this green input signal and this blueness input signal are digital signal; Red output signal, green output signal and blue output signal are simulating signal.In other embodiments, need convert the white signal after adjusting to white output signal.In this example, white signal is digital signal, and white output signal is simulating signal.
The present invention can, according to red input signal, green input signal and blue input signal, dynamically adjust red input signal, green input signal and blue input signal, and the result after adjusting is exported to panel.Therefore, can significantly reduce the power attenuation of panel, and can not affect the picture quality that panel presents.
Although the present invention with preferred embodiment openly as above; so it is not in order to limit the present invention, those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the appended claims person of defining.
Claims (10)
1. a brightness adjusting device, produces an image and exports to a panel, and this panel is according to this image output, show corresponding image, wherein this image output comprises, a red output signal, a green output signal and a blue output signal, this brightness adjusting device, comprising:
One memory cell, pre-conditioned in order to store one first;
One judging unit, pre-conditioned according to a red input signal, a green input signal, a blue input signal and this first, define a main input signal;
One detecting unit, in order to the intensity of testing environment light;
One computing unit, according to the testing result of this main input signal and this detecting unit, adjusts this redness input signal, this green input signal and this blueness input signal; And
One D/A conversion unit, by this redness input signal after adjusting, this green input signal and this blueness input signal convert this redness output signal to, this green output signal and this blueness output signal, wherein this judging unit is first pre-conditioned according to this, process this redness input signal, this green input signal and this blueness input signal, and red input signal to process, the maximum in the green input signal of processing and the blue input signal of processing, as this main input signal, wherein this panel has multiple light-emitting components, this first characteristic pre-conditioned and these light-emitting components relevant or with this redness input signal, this green input signal and this blueness input signal are relevant.
2. brightness adjusting device as claimed in claim 1, also comprise a Date Conversion Unit, according to this redness input signal, this green input signal and this blueness input signal, produce a white signal, this computing unit is also according to this main input signal, adjust this white signal, this D/A conversion unit also converts this white signal after adjusting to a white and outputs signal to this panel.
3. brightness adjusting device as claimed in claim 1, wherein computing unit, the testing result of this detecting unit first pre-conditioned according to this, a user set and this main input signal, adjust this redness input signal, this green input signal and this blueness input signal.
4. an electronic system, comprising:
One panel, according to an image output, shows corresponding image, and this image output comprises, a red output signal, a green output signal and a blue output signal; And
One brightness adjusting device, comprising:
One memory cell, pre-conditioned in order to store one first;
One judging unit, pre-conditioned according to a red input signal, a green input signal, a blue input signal and this first, define a main input signal;
One detecting unit, in order to the intensity of testing environment light;
One computing unit, according to the testing result of this main input signal and this detecting unit, adjusts this redness input signal, this green input signal and this blueness input signal; And
One D/A conversion unit, by this redness input signal after adjusting, this green input signal and this blueness input signal convert this redness output signal to, this green output signal and this blueness output signal, wherein this judging unit is first pre-conditioned according to this, process this redness input signal, this green input signal and this blueness input signal, and red input signal to process, the maximum in the green input signal of processing and the blue input signal of processing, as this main input signal, wherein this panel has multiple light-emitting components, this first characteristic pre-conditioned and these light-emitting components relevant or with this redness input signal, this green input signal and this blueness input signal are relevant.
5. electronic system as claimed in claim 4, wherein this brightness adjusting device also comprises a Date Conversion Unit, in order to according to this redness input signal, this green input signal and this blueness input signal, produce a white signal, this computing unit is also according to this main input signal, adjust this white signal, this D/A conversion unit also converts this white signal after adjusting to a white and outputs signal to this panel.
6. electronic system as claimed in claim 4, wherein computing unit, the testing result of this detecting unit first pre-conditioned according to this, a user set and this main input signal, adjust this redness input signal, this green input signal and this blueness input signal.
7. electronic system as claimed in claim 4, wherein this electronic system is a personal digital assistant, a mobile phone, a digital camera, a TV, a GPS, a vehicle display, a display, a digital frame, a mobile computer or a desktop PC for aviation.
8. a luminance regulating method, exports to a panel in order to produce an image, and this panel is according to this image output, show corresponding image, wherein this image output comprises, a red output signal, a green output signal and a blue output signal, this luminance regulating method, comprising:
Receive a red input signal, a green input signal and a blue input signal;
According to this redness input signal, this green input signal, this blueness input signal and one first pre-conditioned, define a main input signal;
The intensity of testing environment light;
According to the testing result of this main input signal and ambient light, adjust this redness input signal, this green input signal and this blueness input signal; And
By this redness input signal after adjusting, this green input signal and this blueness input signal convert this redness output signal to, this green output signal and this blueness output signal, wherein this redness input signal, this green input signal and this blueness input signal are digital signal, this redness output signal, this green output signal and this blueness output signal are simulating signal, according to this redness input signal, this green input signal, this blueness input signal and this first is pre-conditioned, the step system that defines this main input signal is first pre-conditioned according to this, process this redness input signal, this green input signal and this blueness input signal, and red input signal to process, the maximum in the green input signal of processing and the blue input signal of processing, as this main input signal, wherein this panel has multiple light-emitting components, this first characteristic pre-conditioned and these light-emitting components relevant or with this redness input signal, this green input signal and this blueness input signal are relevant.
9. luminance regulating method as claimed in claim 8, also comprises:
According to this redness input signal, this green input signal and this blueness input signal, produce a white signal;
According to this main input signal, adjust this white signal; And
Convert this white signal after adjusting to a white output signal, this white signal is digital signal, and this white output signal is simulating signal.
10. luminance regulating method as claimed in claim 8, wherein also, the testing result of ambient light first pre-conditioned according to this, a user set and this main input signal, adjust this redness input signal, this green input signal and this blueness input signal.
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| TWI463476B (en) * | 2012-08-01 | 2014-12-01 | Au Optronics Corp | Method of displaying an image with a pixel |
| CN104299600B (en) * | 2013-07-18 | 2016-12-07 | 联咏科技股份有限公司 | Image display device and image optimization method thereof |
| CN106504723B (en) * | 2016-10-09 | 2019-02-15 | 北京金山安全软件有限公司 | Screen color adjusting method and device and electronic equipment |
| CN106409216B (en) * | 2016-12-19 | 2019-11-12 | 上海鸣啸信息科技股份有限公司 | A kind of all-colour LED control device and method suitable for passenger information system |
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