CN100414361C - Liquid-crystal display panel and its voltage adjustment - Google Patents
Liquid-crystal display panel and its voltage adjustment Download PDFInfo
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- CN100414361C CN100414361C CNB2005101209689A CN200510120968A CN100414361C CN 100414361 C CN100414361 C CN 100414361C CN B2005101209689 A CNB2005101209689 A CN B2005101209689A CN 200510120968 A CN200510120968 A CN 200510120968A CN 100414361 C CN100414361 C CN 100414361C
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Abstract
A liquid crystal display face plate consists of multiple scan line, multiple data line, scan actuator, data actuator and controller, setting scan lines and data lines to be line-column arrangement to form multiple pixel, connecting two said actuators separately to said scan line and data line for driving pixel to display image, dividing said face plate to be five detection regions for regulating voltage of common electrode at different time and fixing voltage of common electrode at the same time according to detection result of these five detection regions.
Description
[technical field]
The invention relates to a kind of display panels and voltage adjusting method thereof, particularly about a kind of display panels and voltage adjusting method thereof that reduces flicker level.
[background technology]
Generally believe that at present cathode-ray tube display is that the flicker problem is arranged, and LCD (LCD) there is not the flicker problem in Liquid Crystal Display.In fact cathode-ray tube display still is that LCD all exists certain flicker.Therefore we must reduce flicker level with different correcting modes.
Illustrate the reason that scintillation appears in LCD.Suppose that the liquid crystal display common electrode Vcom voltage that dispatches from the factory is 5.5V, the amplitude of vision signal is between 0V～10V simultaneously, so segmentation voltage is between-5.5V～4.5V.LCD in a Umklapp process, if a certain pixel voltage for-5.5 its neighbors if need be identical with its brightness, then the voltage of this neighbor is 4.5V, different segmentation voltages will cause the difference of brightness, also are the liquid crystal scintillation.Therefore, the flicker of LCD is to stem from the variation of public electrode Vcom and the luminance nonuniformity that causes pixel.Because the otherness of every liquid crystal panel production technology, so the pixel public electrode Vcom voltage reference points between panel and the panel or between the monolithic panel all can be different.
The original liquid crystal panel that dispatches from the factory must strictly be adjusted this parameter to avoid the pixel luminance nonuniformity.A kind of method of reduction LCD flicker of prior art is by manually-operated, adjusts a variable resistor to reach the flicker level that reduces whole front panel.The base substrate of small size screen can be admitted and be low resistance earthing, adds a common single channel mechanical potentiometer adjusting public electrode Vcom magnitude of voltage and carries out manual synchronizing.
But regulating public electrode Vcom voltage, this kind manually operated alternative increases the product line output time easily, and because eye produces the collimation error sometimes and makes adjusted display panels still have scintillation.
[summary of the invention]
Regulate public electrode Vcom voltage by the manually operated alternative and increase the line output time of producing easily in order to overcome prior art, and eye produces the collimation error sometimes makes adjusted display panels still have the defective of scintillation, is necessary to provide a kind of display panels and display panels voltage adjusting method of being convenient to regulate and can reduce the display panels flicker level.
A kind of display panels, it comprises that multi-strip scanning line, many data lines, one scan driver, a data driver and one are ranks with controller, this sweep trace and data line that scanner driver is connected with data driver and arrange and form a plurality of pixels, and this scanner driver and data driver are connected this sweep trace and data line respectively and are used for driving and make the pixel display image.Wherein, this display panels is divided into five detection area, the central area of a plurality of pixels is first detection area, with first detection area is outwards four detection area of distribution of center, be respectively second, the 3rd, the the 4th and the 5th detection area, each detection area comprises a Photosensing Units, this controller is with second, the 3rd, the flicker rank of the flicker rank minimum value and first detection area relatively in the 4th and the 5th detection area, compare the voltage of not adjusting public electrode than two flicker rank simultaneously, compare than two flicker rank when identical the fixedly voltage of public electrode, it is identical to reach the whole liquid crystal display panel flicker level.
A kind of display panels voltage adjusting method, this display panels is first detection area with the central area, with first detection area is outwards four zones of distribution, center, be respectively second detection area, the 3rd detection area, the 4th detection area and the 5th detection area, this voltage adjusting method comprises the steps:
Step 1: detect the brightness of display panels first detection area, second detection area, the 3rd detection area, the 4th detection area and the 5th detection area successively and transfer it to simulating signal;
Step 2: the flicker rank of determining first detection area, second detection area, the 3rd detection area, the 4th detection area and the 5th detection area are respectively the first, second, third, fourth and the 5th flicker rank;
Step 3: compare successively the first flicker rank with second, third, the 4th and the 5th difference of glimmering rank;
If second, third, minimum value does not wait then execution in step four with the first flicker rank in the 4th and the 5th flicker rank, then repeating step one to step 3 until second, third, minimum value and first rank of glimmering equate in the 4th and the 5th flicker rank; If second, third, minimum value and first rank of glimmering equate that then execution in step five in the 4th and the 5th flicker rank;
Step 4: the voltage of fine setting public electrode;
Step 5: the fixing voltage of public electrode.
Compared to prior art, the present invention is a benchmark with flicker rank, display panels central area, other zone compares with it, after inner automatic adjustment draw a public electrode voltages and need not the manual shift mode, therefore be convenient to regulate and have higher degree of regulation, thereby reduce the flicker level of display panels.
[description of drawings]
Fig. 1 is a display panels synoptic diagram of the present invention.
Fig. 2 is a display panels voltage adjusting method synoptic diagram of the present invention.
[embodiment]
Please refer to Fig. 1, is display panels synoptic diagram of the present invention.The controller 6 that this display panels 100 comprises multi-strip scanning line 1, many data lines 2, scanner driver 3, data driver 4, is connected with data driver 4 with scanner driver 3, this sweep trace 1 and data line 2 are the ranks matrix and arrange and form a plurality of pixels 5.This scanner driver 3 and data driver 4 are connected sweep trace 1 and data line 2 respectively and are used for driving and make pixel 5 display images.This each pixel 5 all comprises a Photosensing Units (figure does not show), this Photosensing Units utilizes manufacture of semiconductor that it is embedded in the pixel 5, and this Photosensing Units can be photodiode (Photonic Diode) or phototransistor (Photonic Transistor).This display panels 100 is divided into five detection area, the central area is the first detection area E, with the first detection area E is outwards four detection area of distribution of center, is respectively the second detection area A, the 3rd detection area B, the 4th detection area C and the 5th detection area D.This controller 6 compares the flicker rank of the flicker rank minimum value and the second detection area A among the second detection area A, the 3rd detection area B, the 4th detection area C and the 5th detection area D, do not adjust the voltage of these display panels 100 public electrodes simultaneously, the fixing voltage of public electrode when identical, the flicker level that reaches whole liquid crystal display panel 100 is identical.
Please refer to Fig. 2, is display panels voltage adjusting method synoptic diagram of the present invention.The present invention utilizes Photosensing Units that comparison is repeated on the pixel flicker rank that measured, and uses the internal logic computing to compare best public electrode voltages then, and the public electrode voltages of fixing internal.This display panels voltage adjusting method 10 comprises the steps step 1 S1: the brightness by the Photosensing Units detecting display panels first detection area E, the second detection area A, the 3rd detection area B, the 4th detection area C and the 5th detection area D also transfers simulating signal respectively to successively.Step 2 S2: the flicker rank (Level) of determining the first detection area E, the second detection area A, the 3rd detection area B, the 4th detection area C and the 5th detection area D are respectively e, a, b, c, d.Step 3 S3: (Integrated Circuit, the difference between the flicker rank d of the flicker rank c of flicker rank b, the 4th detection area C of flicker rank a, the 3rd detection area B of the flicker rank e of the first detection area E and the second detection area A and the 5th detection area D is compared in internal logic computing IC) successively with the time control integrated circuit.If minimum value does not wait then execution in step four S4, step 4 S4 with flicker rank e among flicker rank a, b, c and the d: the voltage of fine setting public electrode.Repeating step one S1 equates then execution in step five S5 with the rank e that glimmers to step 3 S3 minimum value in flicker rank a, b, c and d, if minimum value equates then direct execution in step five S5, step 5 S5 with flicker rank e among flicker rank a, b, c and the d: the fixing voltage of public electrode.The big more expression display panels of the voltage of this simulating signal flicker level is big more, and on the contrary, the more little expression display flicker of the voltage of this simulating signal degree is more little.When detecting the brightness of five detection area, the present invention adopts the 127th rank in 0～255 GTG, because middle GTG is the comparatively responsive GTG of human eye perceives.No matter therefore how many GTGs display panels adopts, GTG gets final product with the brightness of detecting five detection area in the middle of all adopting.
Compared to prior art, the present invention is a benchmark with flicker rank, display panels central area, other zone compares with it, after inner automatic adjustment draw a public electrode voltages and need not the manual shift mode, therefore be convenient to regulate and have higher degree of regulation, thereby can effectively reduce the flicker level of display panels.
Claims (9)
1. display panels, it comprises that multi-strip scanning line, many data lines, one scan driver, a data driver and one are ranks with controller, this sweep trace and data line that scanner driver is connected with data driver and arrange and form a plurality of pixels, this scanner driver and data driver are connected this sweep trace and data line respectively and are used for driving and make the pixel display image, it is characterized in that; This display panels is divided into five detection area, the central area of these a plurality of pixels is first detection area, with first detection area is outwards four detection area of distribution of center, be respectively second, the 3rd, the the 4th and the 5th detection area, each detection area comprises a Photosensing Units, this controller is with second, the 3rd, the flicker rank of the flicker rank minimum value and first detection area relatively in the 4th and the 5th detection area, compare the voltage of not adjusting public electrode than two flicker rank simultaneously, compare than two flicker rank when identical the fixedly voltage of public electrode, it is identical to reach the whole liquid crystal display panel flicker level.
2. display panels as claimed in claim 1 is characterized in that: this Photosensing Units is a photodiode.
3. display panels as claimed in claim 1 is characterized in that: this Photosensing Units is a phototransistor.
4. display panels voltage adjusting method, this display panels is first detection area with the central area, with first detection area is outwards four zones of distribution, center, be respectively second detection area, the 3rd detection area, the 4th detection area and the 5th detection area, this voltage adjusting method comprises the steps:
Step 1: detect the brightness of display panels first detection area, second detection area, the 3rd detection area, the 4th detection area and the 5th detection area successively and transfer it to simulating signal;
Step 2: the flicker rank of determining first detection area, second detection area, the 3rd detection area, the 4th detection area and the 5th detection area are respectively the first, second, third, fourth and the 5th flicker rank;
Step 3: compare successively the first flicker rank with second, third, the 4th and the 5th difference of glimmering rank;
If second, third, minimum value does not wait then execution in step four with the first flicker rank in the 4th and the 5th flicker rank, then repeating step one to step 3 until second, third, minimum value and first rank of glimmering equate in the 4th and the 5th flicker rank; If second, third, minimum value and first rank of glimmering equate that then execution in step five in the 4th and the 5th flicker rank;
Step 4: the voltage of fine setting public electrode;
Step 5: the fixing voltage of public electrode.
5. display panels voltage adjusting method as claimed in claim 4 is characterized in that: the middle GTG in all GTGs is all adopted in the brightness of detecting this first, second, third, fourth and the 5th detection area.
6. display panels voltage adjusting method as claimed in claim 4 is characterized in that: the 127th rank in 0～255 GTG are all adopted in the brightness of detecting this first, second, third, fourth and the 5th detection area.
7. display panels voltage adjusting method as claimed in claim 4 is characterized in that: survey the brightness of this display panels with the embedded photo sensing element.
8. display panels voltage adjusting method as claimed in claim 4 is characterized in that: this Photosensing Units is a photodiode.
9. display panels voltage adjusting method as claimed in claim 4 is characterized in that: this Photosensing Units is a phototransistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101209689A CN100414361C (en) | 2005-12-17 | 2005-12-17 | Liquid-crystal display panel and its voltage adjustment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101209689A CN100414361C (en) | 2005-12-17 | 2005-12-17 | Liquid-crystal display panel and its voltage adjustment |
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| CN1982958A CN1982958A (en) | 2007-06-20 |
| CN100414361C true CN100414361C (en) | 2008-08-27 |
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| CNB2005101209689A Expired - Fee Related CN100414361C (en) | 2005-12-17 | 2005-12-17 | Liquid-crystal display panel and its voltage adjustment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645771A (en) * | 2012-04-13 | 2012-08-22 | 华映视讯（吴江）有限公司 | Vcom adjusting method and device for liquid crystal panel |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383130B (en) * | 2007-09-07 | 2010-12-08 | 北京京东方光电科技有限公司 | Lcd |
| CN101577096B (en) * | 2008-05-07 | 2011-07-27 | 群康科技(深圳)有限公司 | Method for adjusting common voltage of liquid crystal display device |
| CN103761951B (en) * | 2013-12-31 | 2016-03-30 | 深圳市华星光电技术有限公司 | A kind of self-adaptation multi-region common electric voltage adjustment System and method |
| CN112347812B (en) * | 2019-08-07 | 2024-04-19 | 群创光电股份有限公司 | Method for detecting fingerprint by electronic device |
| CN113327538B (en) * | 2021-08-04 | 2021-12-17 | 惠科股份有限公司 | Display device, method for acquiring optimal value of common voltage and display control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141092A (en) * | 1997-11-06 | 2000-10-31 | Samsung Electronics Co., Ltd. | Method and apparatus for measuring a flicker level |
| CN1334555A (en) * | 2000-07-24 | 2002-02-06 | 夏普株式会社 | Liquid crystal display drive circuit, liquid crystal display and electronic device thereof |
| CN1453758A (en) * | 2002-04-25 | 2003-11-05 | 夏普株式会社 | Display driving apparatus and display with the same apparatus |
| CN1527275A (en) * | 2003-03-04 | 2004-09-08 | 友达光电股份有限公司 | Automatic voltage regulator for common electrode in panel |
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2005
- 2005-12-17 CN CNB2005101209689A patent/CN100414361C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141092A (en) * | 1997-11-06 | 2000-10-31 | Samsung Electronics Co., Ltd. | Method and apparatus for measuring a flicker level |
| CN1334555A (en) * | 2000-07-24 | 2002-02-06 | 夏普株式会社 | Liquid crystal display drive circuit, liquid crystal display and electronic device thereof |
| CN1453758A (en) * | 2002-04-25 | 2003-11-05 | 夏普株式会社 | Display driving apparatus and display with the same apparatus |
| CN1527275A (en) * | 2003-03-04 | 2004-09-08 | 友达光电股份有限公司 | Automatic voltage regulator for common electrode in panel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645771A (en) * | 2012-04-13 | 2012-08-22 | 华映视讯（吴江）有限公司 | Vcom adjusting method and device for liquid crystal panel |
| CN102645771B (en) * | 2012-04-13 | 2014-12-17 | 华映视讯（吴江）有限公司 | Vcom adjusting method and device for liquid crystal panel |
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| Publication number | Publication date |
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| CN1982958A (en) | 2007-06-20 |
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