CN102568427A - Method for implementing uniform gray-level picture in liquid crystal display - Google Patents
Method for implementing uniform gray-level picture in liquid crystal display Download PDFInfo
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- CN102568427A CN102568427A CN2012100479498A CN201210047949A CN102568427A CN 102568427 A CN102568427 A CN 102568427A CN 2012100479498 A CN2012100479498 A CN 2012100479498A CN 201210047949 A CN201210047949 A CN 201210047949A CN 102568427 A CN102568427 A CN 102568427A
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Abstract
The invention provides a method for implementing a uniform gray-level picture in a liquid crystal display, which comprises the following steps: detecting a switching control signal which is used for controlling time of starting backlight when a liquid crystal rotates to a preset angle; according to the switching control signal, driving a TFT (Thin Film Transistor) corresponding to the liquid crystal in an overdrive mode; obtaining a 3D overdrive lookup table when the backlight is started; and according to the 3D overdrive lookup table, optimizing an overdrive voltage value corresponding to each scanning line on a panel to implement the uniform gray-level picture. After the method provided by the invention is adopted, the TFT corresponding to the liquid crystal is driven in an overdrive mode according to the switching control signal so as to obtain the 3D overdrive lookup table when the backlight is started and then the overdrive voltage value corresponding to each scanning line on the panel is optimized by a progressive regulation strategy, and thus, the uniform gray-level picture of the liquid crystal display in a 3D mode is implemented, the 3D performance of the liquid crystal display is promoted and the 3D viewing experience of users is strengthened.
Description
Technical field
The present invention relates to liquid crystal display, relate in particular to the method that is used to realize even grey menu in this liquid crystal display.
Background technology
Current; Liquid crystal display (Liquid Crystal Display; LCD) (Gray Level Response Time GLRT) measures the response characteristic that can only provide in its GTG conversion to GTG, and can't definitely reflect the dynamic image quality characteristic of display device.In the prior art; Comparatively common mistake is driven voltage technology (Overdrive Technology) though be widely used in LCD display; Yet still lack systematically, generate optimum efficiently or best mistake drive the voltage look-up table (Overdrive Look-Up Table, OD-LUT).Quicken LCD if merely utilize stronger mistake to drive voltage; Though can accelerate GLRT and reduce dynamic fuzzy; But it is bright or dark excessively that the edge that tends to make dynamic content is crossed, and is also referred to as Side Effect or Double Edge, and then reduce the dynamic menu quality of LCD.
On the other hand; Under the 3D of liquid crystal display applied environment; Special mistake to 3D effect is driven voltage look-up table (OD-LUT; Overdrive Look-Up table) normally adjusts, thereby make the picture homogeneous degree of LCD panel reach 70%～80% at the luminance difference of central point and face plate edge to the central point of panel.Though this luminance difference is allowed by the specifications parameter of liquid crystal display, can obviously reduce the image quality of this liquid crystal display when 3D uses.In general, the size of LCD panel is big more, uses individual OD-LUT just serious more to the quality influence of the picture homogeneous degree of whole front panel.For example; Put according to face plate center that normal procedure measured and to drive the voltage look-up table; When the low order machine uses, only there is a light bar to carry out the 3D light modulation usually, under this restriction, considers often to select central point as opportunity of opening backlight based on weight, yet; This can cause by Line540 begin to about the cross-talk quality of (Line1 and Line 1080) both sides not good; The Line1 zone is central point 50% in advance, and Line1080 also falls behind central point 50%, becomes the not good one of the main reasons of 3D uniformity coefficient.
In view of this; How to design a kind of method that in liquid crystal display, is used to realize even grey menu; Make face plate center point and both sides up and down the picture cross-talk qualities be improved significantly; And then promote the 3D uniformity coefficient of liquid crystal display, and strengthen 3D applied environment performance down and show, be a problem needing to be resolved hurrily of person skilled in the industry.
Summary of the invention
To liquid crystal display of the prior art existing above-mentioned defective when realizing even grey menu, the invention provides a kind of method that in liquid crystal display, is used to realize even grey menu.
According to one aspect of the present invention, a kind of method that in liquid crystal display, is used to realize even grey menu is provided, may further comprise the steps:
Detect a switch controlling signal, the backlight open when it is used to control liquid crystal and forwards predetermined angle to constantly;
According to said switch controlling signal, drive and the corresponding TFT of said liquid crystal to cross the mode of driving;
3D when obtaining said backlight open crosses and drives the voltage look-up table; And
Cross according to said 3D and to drive the voltage look-up table and optimize on the panel the corresponding mistake of each sweep trace and drive magnitude of voltage, to realize even grey menu.
In one embodiment, said liquid crystal display adopts one-sided light inlet mode.Further, backlight is arranged at the panel upside or the downside of said liquid crystal display.
In one embodiment, the panel of liquid crystal display vertically is laid with 1024 sweep traces.Preferably, said backlight open is positioned at first sweep trace zone of said panel or last sweep trace zone of said panel constantly.
In another embodiment, liquid crystal display comprises time schedule controller, comes the corresponding mistake of each sweep trace of laddering optimization to drive magnitude of voltage by said time schedule controller.
In addition, the said 3D after the optimization crosses and drives the voltage look-up table and adopt the mistake of each sweep trace to drive magnitude of voltage to represent.
In addition, the said 3D after the optimization crosses and drives the scale-up factor that mistake that the voltage look-up table adopts the mistake of each sweep trace to drive magnitude of voltage and reference scan line drives magnitude of voltage and represent.
In addition, this liquid crystal display can be a LCD TV.
Adopt the method that in liquid crystal display, is used to realize even grey menu of the present invention; Used the mode of driving to drive and the corresponding TFT of liquid crystal according to switch controlling signal; 3D when obtaining backlight open crosses and drives the voltage look-up table, optimizes on the panel the pairing mistake of each bar sweep trace with laddering adjustment strategy then and drives magnitude of voltage, thereby realize the even grey menu under the liquid crystal display 3D pattern; The 3D performance of lifting means, the 3D that strengthens the user views and admires experience.
Description of drawings
The reader with reference to advantages after the embodiment of the present invention, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates according to an embodiment of the present invention, in liquid crystal display, is used to realize the method for even grey menu.
Embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark is represented same or analogous assembly in the accompanying drawing.Yet the embodiment that those of ordinary skill in the art should be appreciated that hereinafter to be provided is used for limiting the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically explaining, does not draw according to its life size.
As previously mentioned, when the size of LCD panel is big more, use individual OD-LUT just serious more to the quality influence of the picture homogeneous degree of whole front panel.For example; Put according to face plate center that normal procedure measured and to drive the voltage look-up table; When the low order machine uses, only there is a light bar to carry out the 3D light modulation usually, under this restriction, considers often to select central point as opportunity of opening backlight based on weight, yet; This can cause by Line540 begin to about the cross-talk quality of (Line1 and Line1080) both sides not good; The Line1 zone is central point 50% in advance, and Line1080 also falls behind central point 50%, becomes the not good one of the main reasons of 3D uniformity coefficient.
In order to improve the picture homogeneous degree of liquid crystal display under the 3D pattern, Fig. 1 illustrates according to an embodiment of the present invention, in liquid crystal display, is used to realize the method for even grey menu.In the method, at first execution in step S1 detects a switch controlling signal, and the backlight open when it is used to control liquid crystal and forwards predetermined angle to constantly.Then, in step S2,, drive and the corresponding TFT of said liquid crystal to cross the mode of driving according to switch controlling signal.Then, execution in step S3, the 3D when obtaining said backlight open crosses and drives the voltage look-up table.At last, in step S4, cross according to said 3D and to drive the voltage look-up table and optimize on the panel the corresponding mistake of each sweep trace and drive magnitude of voltage, to realize even grey menu.
In one embodiment, liquid crystal display adopts one-sided light inlet mode.More specifically, the backlight of this liquid crystal display is arranged at the upside of panel, and from the backlight of panel upside emergent ray downwards.Perhaps, the backlight of this liquid crystal display is arranged at the downside of panel, and from the backlight of panel downside to the top emergent ray.In addition, this liquid crystal display is a LCD TV.
In some specific embodiments, the panel of this liquid crystal display vertically is laid with 1024 sweep traces.Preferably, backlight open is positioned at first sweep trace zone of panel or last sweep trace zone of panel constantly.Specifically; In the method for the invention; The mistake that backlight open is adjusted to Line1 district (first sweep trace zone) constantly and utilizes the Line1 district to adjust under the 3D pattern is driven voltage look-up table OD-LUT; And from Line1 to Line1080 according to increasing progressively or the mode of going forward one by one is driven the voltage look-up table and drives magnitude of voltage and drive corresponding thin film transistor (TFT) (TFT, Thin Film Transistor) to drive the bigger mistake of voltage look-up table than original mistake crossing.Therefore, be not difficult to learn, thereby Line540 is because drive the higher target gray scale that arrives in advance of magnitude of voltage than original mistake, similarly, thereby Line1080 is also because drive the higher target gray scale that also arrives in advance of magnitude of voltage than original mistake.Thus, just can see from Line1 to Line1080 it all being the 3D effect that has arrived corresponding target gray scale brightness, thereby keep even preferably grey menu under the 3D pattern with lower Costco Wholesale in the zone of backlight open.
In addition, liquid crystal display of the present invention also comprises time schedule controller (Tcon), comes the corresponding mistake of each sweep trace of laddering optimization to drive voltage value by this said time schedule controller.In one embodiment, the said 3D after the optimization crosses and drives the voltage look-up table and adopt the mistake of each sweep trace to drive magnitude of voltage to represent.In another embodiment, the said 3D after the optimization crosses and drives the scale-up factor that mistake that the voltage look-up table adopts the mistake of each sweep trace to drive magnitude of voltage and reference scan line drives magnitude of voltage and represent.
Adopt the method that in liquid crystal display, is used to realize even grey menu of the present invention; Used the mode of driving to drive and the corresponding TFT of liquid crystal according to switch controlling signal; 3D when obtaining backlight open crosses and drives the voltage look-up table, optimizes on the panel the pairing mistake of each bar sweep trace with laddering adjustment strategy then and drives magnitude of voltage, thereby realize the even grey menu under the liquid crystal display 3D pattern; The 3D performance of lifting means, the 3D that strengthens the user views and admires experience.
In the preceding text, illustrate and describe embodiment of the present invention.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also specific embodiments of the invention do various changes and replacement.These changes and replacement all drop in claims of the present invention institute restricted portion.
Claims (9)
1. a method that in liquid crystal display, is used to realize even grey menu is characterized in that, this method comprises:
Detect a switch controlling signal, the backlight open when it is used to control liquid crystal and forwards predetermined angle to constantly;
According to said switch controlling signal, drive and the corresponding TFT of said liquid crystal to cross the mode of driving;
3D when obtaining said backlight open crosses and drives the voltage look-up table; And
Cross according to said 3D and to drive the voltage look-up table and optimize on the panel the corresponding mistake of each sweep trace and drive magnitude of voltage, to realize even grey menu.
2. method according to claim 1 is characterized in that, said liquid crystal display adopts one-sided light inlet mode.
3. method according to claim 2 is characterized in that, backlight is arranged at the panel upside or the downside of said liquid crystal display.
4. method according to claim 1 is characterized in that, the panel of said liquid crystal display vertically is laid with 1024 sweep traces.
5. method according to claim 4 is characterized in that, said backlight open is positioned at first sweep trace zone of said panel or last sweep trace zone of said panel constantly.
6. method according to claim 1 is characterized in that said liquid crystal display comprises time schedule controller, comes the corresponding mistake of each sweep trace of laddering optimization to drive magnitude of voltage by said time schedule controller.
7. method according to claim 1 is characterized in that, the said 3D after the optimization crosses and drives the voltage look-up table and adopt the mistake of each sweep trace to drive magnitude of voltage to represent.
8. method according to claim 1 is characterized in that, the said 3D after the optimization crosses and drives the scale-up factor that mistake that the voltage look-up table adopts the mistake of each sweep trace to drive magnitude of voltage and reference scan line drives magnitude of voltage and represent.
9. method according to claim 1 is characterized in that, said liquid crystal display is a LCD TV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100479498A CN102568427A (en) | 2012-02-24 | 2012-02-24 | Method for implementing uniform gray-level picture in liquid crystal display |
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| CN2012100479498A CN102568427A (en) | 2012-02-24 | 2012-02-24 | Method for implementing uniform gray-level picture in liquid crystal display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324875A (en) * | 2016-10-24 | 2017-01-11 | 京东方科技集团股份有限公司 | Method and device for determining overdrive voltage as well as display device |
| CN116434714A (en) * | 2023-04-27 | 2023-07-14 | 惠科股份有限公司 | Display panel adjusting method and display device |
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2012
- 2012-02-24 CN CN2012100479498A patent/CN102568427A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324875A (en) * | 2016-10-24 | 2017-01-11 | 京东方科技集团股份有限公司 | Method and device for determining overdrive voltage as well as display device |
| CN106324875B (en) * | 2016-10-24 | 2019-04-30 | 京东方科技集团股份有限公司 | A kind of method, apparatus and display equipment of determining overdrive voltage |
| CN116434714A (en) * | 2023-04-27 | 2023-07-14 | 惠科股份有限公司 | Display panel adjusting method and display device |
| CN116434714B (en) * | 2023-04-27 | 2024-04-26 | 惠科股份有限公司 | Display panel adjusting method and display device |
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Application publication date: 20120711 |