CN107331357B - Improve the method for liquid crystal display panel ghost - Google Patents
- ️Tue Sep 17 2019
CN107331357B - Improve the method for liquid crystal display panel ghost - Google Patents
Improve the method for liquid crystal display panel ghost Download PDFInfo
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Publication number
- CN107331357B CN107331357B CN201710482799.6A CN201710482799A CN107331357B CN 107331357 B CN107331357 B CN 107331357B CN 201710482799 A CN201710482799 A CN 201710482799A CN 107331357 B CN107331357 B CN 107331357B Authority
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- liquid crystal
- crystal display
- display panel
- grayscale
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- 2017-06-22 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract 33
- 230000003247 decreasing effect Effects 0.000 claims abstract 2
- 230000005611 electricity Effects 0.000 claims 1
Classifications
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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
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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
- G09G3/3696—Generation of voltages supplied to electrode 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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of method for improving liquid crystal display panel ghost.The common voltage that this method takes flicker value when liquid crystal display panel shows the picture of 255 grayscale when being a default flicker value is the first common voltage, and first common voltage is increased or decreased into preset voltage deviation and obtains the second common voltage, the corresponding initial gray scale voltage of multiple preset grayscale in addition to 255 grayscale is adjusted according to the standard gamma curve of the liquid crystal display panel on the basis of the second common voltage, obtain amendment gray scale voltage corresponding with multiple preset grayscale, when liquid crystal display panel is shown, utilize the second common voltage, multiple amendment gray scale voltages, and the initial gray scale voltage of preset 255 grayscale of correspondence drives it, the region for showing 255 grayscale can be made to generate direct current residual, it is offset when showing other grey menus later bright between other regions Difference is spent, reversed ghost is effectively improved, promotes display quality.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of methods for improving liquid crystal display panel ghost.
Background technique
With the development of display technology, the planes such as liquid crystal display (Liquid Crystal Display, LCD) display dress It sets because having many advantages, such as that high image quality, power saving, fuselage is thin and has a wide range of application, and is widely used in mobile phone, TV, a number The various consumer electrical products such as word assistant, digital camera, laptop, desktop computer, become the master in display device Stream.
Liquid crystal display on existing market is largely backlight liquid crystal display comprising liquid crystal display panel and back Optical mode group (backlight module).The working principle of liquid crystal display panel is in thin-film transistor array base-plate (Thin Film Transistor Array Substrate, TFT Array Substrate) and colored filter substrate (Color Filter, CF) between pour into liquid crystal molecule, and apply driving voltage on two plate bases to control the rotation side of liquid crystal molecule To, by the light refraction of backlight module come out generate picture.
In current TFT-LCD, the problem of generally existing ghost (Image Sticking, IS).Its detection method one As are as follows: firstly, liquid crystal display panel is made to keep the display alternate gridiron pattern picture of black and white for a period of time (generally 7 days), later, Liquid crystal display panel is set to show the picture of preset gray scale, at this time, it is found that liquid crystal display panel remains original tessellated image, The brightness when showing the picture of preset gray scale of the corresponding display area in i.e. tessellated white area and black area is variant.It is default in display When the picture of grayscale, if the corresponding region in original tessellated white area region more corresponding than black area is bright, referred to as positive ghost, , whereas if the corresponding region in tessellated white area region more corresponding than black area is dark originally, referred to as reversed ghost.Ghost is deposited In the display taste that can reduce liquid crystal display panel, product quality is reduced.
Therefore, it is necessary to propose a kind of method of improvement liquid crystal display panel ghost to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for improving liquid crystal display panel ghost, can be effectively improved liquid crystal Show the reversed ghost of panel, promotes display quality.
To achieve the above object, the present invention provides a kind of method for improving liquid crystal display panel ghost, includes the following steps:
Step S1, a liquid crystal display panel is provided, obtains the standard gamma curve of the liquid crystal display panel, and according to The standard gamma curve obtains multiple target brightness values corresponding with multiple preset grayscale in addition to 255 grayscale respectively；
Step S2, it obtains when the liquid crystal display panel shows 255 grey menu, so that the flashing of liquid crystal display panel Value is the first common voltage of a default flicker value；
Step S3, the first common voltage is increased or decreased into preset voltage deviation, obtains the second common voltage；
Step S4, Xiang Suoshu liquid crystal display panel inputs the second common voltage, and successively defeated to the liquid crystal display panel Enter multiple initial gray scale voltages of the multiple preset grayscale of preset correspondence, when one initial gray scale voltage of every input, constantly adjusts The initial gray scale voltage is until the brightness of liquid crystal display panel at this time reaches the preset grayscale pair of the corresponding initial gray scale voltage The target brightness value answered obtains multiple amendment gray scale voltages corresponding with multiple preset grayscale；
Step S5, the initial ash of the second common voltage, multiple amendment gray scale voltages and 255 grayscale of preset correspondence is utilized Rank voltage driving liquid crystal display panel is shown.
The step S1 obtains the detailed process of the standard gamma curve of the liquid crystal display panel are as follows: provides a brightness Sensing device makes the liquid crystal display panel show 0 grey menu and 255 grey menus respectively, is filled using the brightness sensing The brightness obtained when liquid crystal display panel shows 0 grey menu and 255 grey menu is set, shows 0 ash using liquid crystal display panel Brightness and preset standard Gamma value when rank picture and 255 grey menu, the standard Gamma for obtaining liquid crystal display panel are bent Line.
The standard gamma curve of the liquid crystal display panel meets:
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness when 0 grey menu, L are shown for liquid crystal display panelmax255 are shown for liquid crystal display panel Brightness when grey menu, γ are that preset standard Gamma value, 0≤x < 256, and x are integer, LxIt is corresponding with x grayscale Target brightness value.
The preset standard Gamma value is 2.2.
The brightness of liquid crystal display panel is measured using the brightness sensing device in the step S4, to determine liquid The brightness of LCD panel reaches target brightness value.
The voltage deviation is greater than 0 and is less than or equal to 2V.
The step S2 specifically: input 255 grayscale of initial common voltage and preset correspondence to liquid crystal display panel Initial gray scale voltage makes liquid crystal display panel show 255 grey menus, to LCD display while adjusting initial common voltage The flicker value of plate is detected, until the flicker value of liquid crystal display panel is default flicker value, obtains the first common voltage.
Corresponding each preset grayscale is default, and there are two unequal initial gray scale voltages.
Beneficial effects of the present invention: a kind of method improving liquid crystal display panel ghost provided by the invention, in liquid crystal Common voltage when to take flicker value when showing the picture of 255 grayscale of Display panel be a default flicker value is the first common voltage, and First common voltage is increased or decreased into preset voltage deviation and obtains the second common voltage, in the base of the second common voltage It is corresponding to multiple preset grayscale in addition to 255 grayscale initial according to the standard gamma curve of the liquid crystal display panel on plinth Gray scale voltage is adjusted, and is obtained amendment gray scale voltage corresponding with multiple preset grayscale, is shown in liquid crystal display panel When showing, using the initial gray scale voltage of the second common voltage, multiple amendment gray scale voltages and 255 grayscale of preset correspondence to it Driven, can make show 255 grayscale region generate direct current residual, when showing other grey menus later offset and its Luminance difference between his region effectively improves reversed ghost, promotes display quality.
Detailed description of the invention
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is the flow chart of the method for improvement liquid crystal display panel ghost of the invention.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention Example and its attached drawing are described in detail.
Referring to Fig. 1, the present invention provides a kind of method for improving liquid crystal display panel ghost, include the following steps:
Step S1, a liquid crystal display panel is provided, obtains the standard gamma curve of the liquid crystal display panel, and according to The standard gamma curve obtains multiple target brightness values corresponding with multiple preset grayscale in addition to 255 grayscale respectively.
Specifically, the step S1 obtains the detailed process of the standard gamma curve of the liquid crystal display panel are as follows: provides One brightness sensing device makes the liquid crystal display panel show 0 grey menu and 255 grey menus respectively, utilizes the brightness Sensing device obtains brightness when liquid crystal display panel shows 0 grey menu and 255 grey menu, aobvious using liquid crystal display panel Show the brightness and preset standard Gamma value when 0 grey menu and 255 grey menu, obtains the standard of liquid crystal display panel Gamma curve.
Further, the standard gamma curve of the liquid crystal display panel meets:
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness when 0 grey menu, L are shown for liquid crystal display panelmax255 are shown for liquid crystal display panel Brightness when grey menu, γ are that preset standard Gamma value, 0≤x < 256, and x are integer, LxIt is corresponding with x grayscale Target brightness value.
Preferably, the preset standard Gamma value is 2.2.
Step S2, it obtains when the liquid crystal display panel shows 255 grey menu, so that the flashing of liquid crystal display panel Value is the first common voltage of a default flicker value.
Specifically, the step S2 specifically: input initial common voltage and preset correspondence to liquid crystal display panel The initial gray scale voltage of 255 grayscale, makes liquid crystal display panel show 255 grey menus, while adjusting initial common voltage pair The flicker value of liquid crystal display panel is detected, until the flicker value of liquid crystal display panel is default flicker value, it is public to obtain first Common voltage.
Step S3, the first common voltage is increased or decreased into preset voltage deviation, obtains the second common voltage.
Preferably, the voltage deviation is greater than 0 and is less than or equal to 2V.
Step S4, Xiang Suoshu liquid crystal display panel inputs the second common voltage, and successively defeated to the liquid crystal display panel Enter multiple initial gray scale voltages of the multiple preset grayscale of preset correspondence, when one initial gray scale voltage of every input, constantly adjusts The initial gray scale voltage is until the brightness of liquid crystal display panel at this time reaches the preset grayscale pair of the corresponding initial gray scale voltage The target brightness value answered obtains multiple amendment gray scale voltages corresponding with multiple preset grayscale.
Specifically, the brightness of liquid crystal display panel is measured using the brightness sensing device in the step S4, To determine that the brightness of liquid crystal display panel reaches target brightness value.
Specifically, default there are two unequal initial gray scale voltages for corresponding each preset grayscale.
Step S5, the initial ash of the second common voltage, multiple amendment gray scale voltages and 255 grayscale of preset correspondence is utilized Rank voltage driving liquid crystal display panel is shown.
It should be noted that the method for improvement liquid crystal display panel ghost of the invention, shows 255 in liquid crystal display panel Common voltage when to take flicker value when the picture of grayscale be a default flicker value is the first common voltage, which is For best common voltage of the liquid crystal display panel when showing 255 grey menu, first common voltage increasing is added deduct later Few preset voltage deviation obtains the second common voltage, according to the liquid crystal display panel on the basis of the second common voltage Standard gamma curve is adjusted the corresponding initial gray scale voltage of multiple preset grayscale in addition to 255 grayscale, obtain with it is more The corresponding amendment gray scale voltage of a preset grayscale, namely using second common voltage as other grayscale in addition to 255 grayscale Best common voltage, when liquid crystal display panel is shown, using the second common voltage, multiple amendment gray scale voltages and The initial gray scale voltage of preset 255 grayscale of correspondence drives it, keeps liquid crystal display panel carrying out ghost detection When showing the alternate gridiron pattern picture of black and white, the region in the region namely 255 grayscale that show white square can generate direct current residual, make by When the alternate gridiron pattern picture of black and white becomes the picture of a default detection grayscale, white square is shown before being allowed to due to direct current residual action Region it is partially bright, can offset before display 255 grayscale and show 0 grayscale region between luminance difference, effectively improve Reversed ghost promotes display quality；Similarly, when liquid crystal display panel is normally shown, show that the region of 255 grayscale is same Sample generates direct current residual, and when showing other grey menus later, the regional display is partially bright, offsets bright between other regions Difference is spent, reversed ghost is effectively improved, promotes display quality.
In conclusion the method for improvement liquid crystal display panel ghost of the invention, shows 255 grayscale in liquid crystal display panel Picture when common voltage when to take flicker value be a default flicker value be the first common voltage, and first common voltage is increased The preset voltage deviation that adds deduct less obtains the second common voltage, according to the liquid crystal display on the basis of the second common voltage The standard gamma curve of panel is adjusted the corresponding initial gray scale voltage of multiple preset grayscale in addition to 255 grayscale, obtains The second common electrical is utilized when liquid crystal display panel is shown to amendment gray scale voltage corresponding with multiple preset grayscale The initial gray scale voltage of pressure, multiple amendment gray scale voltages and 255 grayscale of preset correspondence drives it, can make to show The region of 255 grayscale generates direct current residual, and the luminance difference between other regions is offset when showing other grey menus later It is different, reversed ghost is effectively improved, display quality is promoted.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the appended right of the present invention It is required that protection scope.
Claims (7)
1. a kind of method for improving liquid crystal display panel ghost, which comprises the steps of:
Step S1, a liquid crystal display panel is provided, obtains the standard gamma curve of the liquid crystal display panel, and according to described Standard gamma curve obtains multiple target brightness values corresponding with multiple preset grayscale in addition to 255 grayscale respectively；
Step S2, it obtains when the liquid crystal display panel shows 255 grey menu, so that the flicker value of liquid crystal display panel is First common voltage of one default flicker value；
Step S3, the first common voltage is increased or decreased into preset voltage deviation, obtains the second common voltage；
Step S4, Xiang Suoshu liquid crystal display panel inputs the second common voltage, and successively pre- to liquid crystal display panel input If the multiple preset grayscale of correspondence multiple initial gray scale voltages, when one initial gray scale voltage of every input, it is first constantly to adjust this Beginning gray scale voltage is until the brightness of the liquid crystal display panel at this time preset grayscale that reaches the corresponding initial gray scale voltage is corresponding Target brightness value obtains multiple amendment gray scale voltages corresponding with multiple preset grayscale；
Step S5, the initial grayscale electricity of the second common voltage, multiple amendment gray scale voltages and 255 grayscale of preset correspondence is utilized Pressure driving liquid crystal display panel is shown；
The step S2 specifically: input the initial of 255 grayscale of initial common voltage and preset correspondence to liquid crystal display panel Gray scale voltage makes liquid crystal display panel show 255 grey menus, to liquid crystal display panel while adjusting initial common voltage Flicker value is detected, until the flicker value of liquid crystal display panel is default flicker value, obtains the first common voltage.
2. improving the method for liquid crystal display panel ghost as described in claim 1, which is characterized in that the step S1 obtains institute State the detailed process of the standard gamma curve of liquid crystal display panel are as follows: a brightness sensing device is provided, the LCD display is made Plate shows 0 grey menu and 255 grey menus respectively, obtains liquid crystal display panel using the brightness sensing device and shows 0 ash Brightness when rank picture and 255 grey menu, it is bright when showing 0 grey menu and 255 grey menu using liquid crystal display panel Degree and preset standard Gamma value, obtain the standard gamma curve of liquid crystal display panel.
3. improving the method for liquid crystal display panel ghost as claimed in claim 2, which is characterized in that the liquid crystal display panel Standard gamma curve meet:
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness when 0 grey menu, L are shown for liquid crystal display panelmax255 grayscale are shown for liquid crystal display panel Brightness when picture, γ are that preset standard Gamma value, 0≤x < 256, and x are integer, LxFor target corresponding with x grayscale Brightness value.
4. improving the method for liquid crystal display panel ghost as claimed in claim 2, which is characterized in that the preset standard Gamma value is 2.2.
5. improving the method for liquid crystal display panel ghost as claimed in claim 2, which is characterized in that utilized in the step S4 The brightness sensing device measures the brightness of liquid crystal display panel, to determine that the brightness of liquid crystal display panel reaches target Brightness value.
6. improving the method for liquid crystal display panel ghost as described in claim 1, which is characterized in that the voltage deviation is big In 0 and be less than or equal to 2V.
7. improving the method for liquid crystal display panel ghost as described in claim 1, which is characterized in that corresponding each preset ash Rank is default, and there are two unequal initial gray scale voltages.
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| CN201710482799.6A CN107331357B (en) | 2017-06-22 | 2017-06-22 | Improve the method for liquid crystal display panel ghost |
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| CN107331357B true CN107331357B (en) | 2019-09-17 |
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| CN108597428A (en) * | 2018-04-28 | 2018-09-28 | 惠州市华星光电技术有限公司 | Driving voltage adjustment method and liquid crystal display |
| CN110136631B (en) * | 2019-06-25 | 2022-03-01 | 惠州市华星光电技术有限公司 | Method for adjusting display picture of display device |
| CN115547268A (en) * | 2021-06-30 | 2022-12-30 | 华显光电技术（惠州）有限公司 | Method, device, and computer equipment for determining common voltage of liquid crystal display panel |
| CN114694611A (en) * | 2022-01-10 | 2022-07-01 | 重庆翰博显示科技研发中心有限公司 | Novel liquid crystal residual image processing technology for Mini LED display screen |
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| KR100266212B1 (en) * | 1997-05-17 | 2000-09-15 | 구본준; 론 위라하디락사 | Lcd with the function of removing residual image |
| KR100919196B1 (en) * | 2002-12-31 | 2009-09-28 | 엘지디스플레이 주식회사 | In plane switching mode liquid crystal display device |
| TWI366393B (en) * | 2007-10-12 | 2012-06-11 | Taiwan Tft Lcd Ass | Method and apparatus of measuring image-sticking of a display device |
| CN105654917B (en) * | 2016-04-08 | 2018-03-30 | 京东方科技集团股份有限公司 | Polarity reversal driving method, data driver and liquid crystal panel |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |