CN101191926A - LCD device and its gamma curve adjusting apparatus and process - Google Patents
LCD device and its gamma curve adjusting apparatus and process Download PDFInfo
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- CN101191926A CN101191926A CNA2006101684070A CN200610168407A CN101191926A CN 101191926 A CN101191926 A CN 101191926A CN A2006101684070 A CNA2006101684070 A CN A2006101684070A CN 200610168407 A CN200610168407 A CN 200610168407A CN 101191926 A CN101191926 A CN 101191926A
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Abstract
The present invention discloses a liquid crystal display and the gamma curve adjusting device and method thereof. The gamma curve adjusting device and the method thereof provided by the present invention adjusts a gamma curve to be the most suitable for the viewing through human eyes according to the brightness changes of surrounding environment of a liquid crystal display. Therefore, users can be led to feel that the color brightness of the liquid crystal display is high in resolution, and the pictures displayed by the liquid crystal display can become clearer.
Description
Technical field
The present invention is about a kind of gamma curve adjusting apparatus and method thereof of LCD, and particularly can change according to the brightness of LCD context relevant for a kind of, and adjusts the gamma curve adjusting apparatus and the method thereof of the gamma value of gamma curve at any time.
Background technology
At improving rapidly of multimedia society, be indebted to the tremendous progress of semiconductor element or display device mostly.With regard to display, have that high image quality, space utilization efficient are good, the Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display is called for short TFT-LCD) of low consumpting power, advantageous characteristic such as radiationless becomes the market mainstream gradually.
But what deserves to be mentioned is earlier at this, because human eye is not to be linearity for the identification capability of light luminance, so vision signal frequency electronic standard association (Video Electronics Standards Association, be called for short VESA) at this phenomenon, making gamma value (gamma value) according to the human eye characteristic is 2.2 curve, allowing the designer who is engaged in the TFT-LCD association area can pursue so brightness contrast, and the grey menu that TFT-LCD is presented becomes the display frame that the most suitable human eye is watched.
Yet, because the gamma value that VESA formulated is 2.2 curve, it is made fixing under the environment of darkroom (darkroom), so when TFT-LCD is in context brightness when very dark, its shown identical GTG (gray level) picture, human eye can clearly be told clear and stratified GTG, but when TFT-LCD is in bright following time of environment, its shown many close GTGs (gray level) picture, human eye just can't clearly have been told different GTG this moment, so will allow the user think that the resolution of chroma-luminance of TFT-LCD is not good, and its shown picture shortcoming such as comparatively fuzzy that can become continue and derives out.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of gamma curve adjusting apparatus and method thereof, it changes by the brightness according to the LCD context, and adjust the required gamma curve of GTG that defines vision signal, so that this gamma curve becomes the gamma curve that the most suitable human eye is watched.
Another object of the present invention just provides a kind of LCD, it is by being used in gamma curve adjusting apparatus and method thereof that the invention described above proposed wherein, LCD just can change according to the brightness of its context by this, and present the display frame that the most suitable human eye is watched, so allowing the user feel the resolution height of chroma-luminance of LCD, and its shown picture can become comparatively clear.
Based on above-mentioned and other purpose, gamma curve adjusting apparatus provided by the present invention comprises surround lighting processing unit, gamma curve adjuster, and system's central controller.Wherein, the surround lighting processing unit can change and the output luminance signal according to the brightness of gamma curve adjusting apparatus context.The luminance signal that the gamma curve adjuster can be exported according to the surround lighting processing unit, and adjust the gamma curve that it is exported.System's central controller can be according to gamma curve adjuster adjustment gamma curve later, and defines the GTG of its vision signal that receives.
From another viewpoint, LCD provided by the present invention comprises gamma curve adjusting apparatus and display panels.Wherein, gamma curve adjusting apparatus can change according to the brightness of LCD context, and adjusts the required gamma curve of GTG of definition vision signal.Display panels then can be according to the GTG of above-mentioned vision signal the display video signal picture.
From another viewpoint, gamma curve method of adjustment provided by the present invention is applicable to LCD again, and it comprises the following steps: that at first the brightness of detecting LCD context changes.Then, the brightness according to the LCD context changes and the required gamma curve of GTG of adjustment definition vision signal.
Gamma curve adjusting apparatus provided by the present invention and method thereof, it goes in now the LCD, because gamma curve adjusting apparatus provided by the present invention and method thereof are the brightness variations according to the LCD context, and adjust the gamma curve that the most suitable human eye is watched, so not only can allow the user feel the resolution height of chroma-luminance of LCD, and its shown picture also can become comparatively clear.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment of the present invention cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is the calcspar according to the LCD of preferred embodiment of the present invention.
Fig. 2 is the pairing contrast gamma curve of the built-in look-up table of the gamma curve adjuster synoptic diagram of preferred embodiment of the present invention.
Fig. 3 is the process flow diagram according to the gamma curve method of adjustment of preferred embodiment of the present invention.
Embodiment
The technology effect that the present invention desired to reach existingly is in bright following time of environment when LCD for solving, its shown many close grey menu, human eye also can't clearly be told the shortcoming of different GTG, and following content will be to do one at the technical characterictic of this case and the effect desiring to reach to encyclopaedize, and consider and examine to offer this invention those skilled in the relevant art.
Fig. 1 is the calcspar according to the LCD of preferred embodiment of the present invention.Please refer to Fig. 1, (for example be film point transistor liquid crystal display (TFT-LCD), TFT-LCD) 100 comprise gamma curve adjusting apparatus 101, video signal generator 103 to LCD, and display panels 105.Wherein, gamma curve adjusting apparatus 101 can change according to the brightness LS_int of LCD 100 contexts, and the required gamma curve (gamma curve) of GTG (gray level) of the vision signal VS that adjustment definition video signal generator 103 is provided.103 of display panels can be watched to the user by the display video signal picture according to the GTG of above-mentioned vision signal VS.
In present embodiment, sign indicating number curve adjusting apparatus 101 comprises surround lighting processing unit 101a, gamma curve adjuster 101b, and the central controller 101c of system.Wherein, surround lighting processing unit 101a is made of OPTICAL SENSORS (light sensor) 107 and light amplification processor 109.At first, by the brightness LS_int variation of OPTICAL SENSORS 107 sensing LCD 100 contexts, and export a light sensing signal LSS according to this.And then, 109 light sensing signal LSS that OPTICAL SENSORS 107 is exported of light amplification processor amplify a yield value (this yield value should be decided on actual state), and it is done behind noise filtering and the distortion compensation output one luminance signal IS to gamma curve adjuster 101b.
Afterwards, after gamma curve adjuster 101b receives luminance signal IS, the look-up table of The built-in (lookup table does not illustrate) is can be according to luminance signal IS corresponding finds out a contrast gamma curve, and 101b adjusts the gamma curve of being exported according to this for the gamma curve adjuster.By this, the central controller 101c of system (for example being vision signal IC) then adjusts gamma curve later according to gamma curve adjuster 101b, and the GTG of video signal generator 103 provides to its vision signal VS is provided, the GTG display video signal picture of the vision signal VS after will defining by display panels 105 is so again watched to the user.
What deserves to be mentioned is at this, in be built in the look-up table of gamma curve adjuster 101b, it must pass through loaded down with trivial details experimentation, what change in lumen (lumen) scope with the brightness LS_int that defines when LCD 100 contexts, it finds out pairing contrast gamma curve, by this adjusting the gamma curve that the most suitable human eye is watched, allowing the user feel the resolution height of chroma-luminance of LCD 100, and its shown picture also can become more clear.
Fig. 2 is the pairing contrast gamma curve of the built-in look-up table of the gamma curve adjuster 101b synoptic diagram of present embodiment, and its transverse axis is represented video signal gray scale (gray level), and the longitudinal axis is represented brightness (cd/m2).In 4 contrast gamma curves that Fig. 2 disclosed, the gamma value of the contrast gamma curve of solid line (-) (gamma value) is 2.2, the gamma value of the contrast gamma curve of dotted line (---) is 1.3, and dotted line (gamma value of contrast gamma curve .-.-) is that the experiment value according to loaded down with trivial details experiment gained (for example can be 2.0,1.8 ...), wherein this experiment value should be decided on actual state, so be not restricted to this at this.
And what deserves to be mentioned is that Fig. 2 is the example explanation for disclosing 4 contrast gamma curves, but be not restricted to this at this.That is to say that the user can be according to the actual state demand, and relative increase or reduce the number of above-mentioned contrast gamma curve.
Fig. 3 is the process flow diagram according to the gamma curve method of adjustment of preferred embodiment of the present invention, the method is applicable to LCD, it comprises the following steps: at first, as described in step S301, provides OPTICAL SENSORS (light sensor) to change with the brightness of detecting LCD context.Then, as described in step S303, according to the brightness variation of LCD context, and correspondence is found out a contrast gamma curve in look-up table.At last, as described in step S305, adjust the required gamma curve of GTG of definition vision signal according to this contrast gamma curve.
According to the simpler saying of above steps be exactly: LCD can change according to the brightness of context instantly; and adjustment at any time defines the gamma value (gamma value) of the required gamma curve of video signal gray scale; by this so long as utilize the brightness of context to change; and adjust the notion that defines the required gamma curve of video signal gray scale, it all belongs within the scope of institute of the present invention desire protection.
In sum, gamma curve adjusting apparatus provided by the present invention and method thereof, it is applicable in now the LCD, so the spirit of setting forth according to the foregoing description has following advantage and narrates:
Because the brightness by surround lighting processing unit sensing LCD context changes, and adjust the gamma value of the gamma curve that the gamma curve adjuster exported at any time, so no matter LCD is to be in bright environment or darkroom, all can allow the user feel the resolution height of chroma-luminance of LCD, and its shown picture can become comparatively clear.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (13)
1. gamma curve adjusting apparatus comprises:
One surround lighting processing unit is exported a luminance signal according to the brightness variation of this an ancient woman's ornament Maqu line adjusting device context;
One gamma curve adjuster is electrically coupled to this surround lighting processing unit, adjusts the gamma curve that this gamma curve adjuster is exported according to this luminance signal; And
One system's central controller, electric property coupling be as for this gamma curve adjuster, defines the GTG of the vision signal that this system's central controller received according to this gamma curve.
2. gamma curve adjusting apparatus as claimed in claim 1 is characterized in that, this surround lighting processing unit comprises:
One OPTICAL SENSORS is exported a light sensing signal according to this in order to this brightness variation of sensing; And
One light amplification processor is electrically coupled to this OPTICAL SENSORS, in order to this light sensing signal is amplified a yield value, and it is done this luminance signal of output behind noise filtering and the distortion compensation.
3. gamma curve adjusting apparatus as claimed in claim 1, it is characterized in that, the built-in look-up table of this gamma curve adjuster, this look-up table are corresponding according to this luminance signal finds out a contrast gamma curve, adjusts this gamma curve of being exported according to this for this gamma curve adjuster.
4. gamma curve adjusting apparatus as claimed in claim 1 is characterized in that, this system's central controller comprises a vision signal IC.
5. LCD comprises:
One gamma curve adjusting apparatus according to the brightness variation of this LCD context, and is adjusted the required gamma curve of GTG that defines a vision signal; And
Display panels is electrically coupled to this gamma curve adjusting apparatus, shows a vision signal picture according to the GTG of this vision signal.
6. LCD as claimed in claim 5 is characterized in that, this gamma curve adjusting apparatus comprises:
One surround lighting processing unit is exported a luminance signal according to this brightness variation;
One gamma curve adjuster is electrically coupled to this surround lighting processing unit, adjusts this gamma curve that this gamma curve adjuster is exported according to this luminance signal; And
One system's central controller, electric property coupling be as for this gamma curve adjuster, defines the GTG of this vision signal that this system's central controller received according to this gamma curve.
7. LCD as claimed in claim 6 is characterized in that, also comprises a video signal generator, is electrically coupled to this system's central controller, in order to this vision signal to be provided.
8. LCD as claimed in claim 6 is characterized in that, this surround lighting processing unit comprises:
One OPTICAL SENSORS is exported a light sensing signal according to this in order to this brightness variation of sensing; And
One light amplification processor is electrically coupled to this OPTICAL SENSORS, in order to this light sensing signal is amplified a yield value, and it is done this luminance signal of output behind noise filtering and the distortion compensation.
9. LCD as claimed in claim 6, it is characterized in that, the built-in look-up table of this gamma curve adjuster, this look-up table are corresponding according to this luminance signal finds out a contrast gamma curve, adjusts this gamma curve of being exported according to this for this gamma curve adjuster.
10. LCD as claimed in claim 6 is characterized in that, this system's central controller comprises a vision signal IC.
11. a gamma curve method of adjustment, this method is applicable to a LCD, comprises the following steps:
A brightness of detecting this LCD context changes; And
Change and the required gamma curve of GTG of adjustment definition one vision signal according to this brightness.
12. gamma curve method of adjustment as claimed in claim 11 is characterized in that, also comprises the following steps: in the step that this brightness of detecting this LCD context changes
Provide an OPTICAL SENSORS to change with this brightness of sensing.
13. gamma curve as claimed in claim 11 is carried adjusting method, it is characterized in that, also comprises the following steps: in the step of this required gamma curve of the GTG of adjusting this vision signal of definition according to this brightness variation
Correspondence is found out a contrast gamma curve in a look-up table according to this brightness variation; And
Adjust this required gamma curve of GTG of this vision signal of definition according to this contrast gamma curve.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101684070A CN101191926A (en) | 2006-12-01 | 2006-12-01 | LCD device and its gamma curve adjusting apparatus and process |
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| CNA2006101684070A CN101191926A (en) | 2006-12-01 | 2006-12-01 | LCD device and its gamma curve adjusting apparatus and process |
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| CN102377939A (en) * | 2010-08-05 | 2012-03-14 | 奥林巴斯映像株式会社 | Shooting device and image reappearance device |
| CN102542681A (en) * | 2010-11-10 | 2012-07-04 | 环球娱乐株式会社 | Gaming machine running common game |
| CN102770797A (en) * | 2010-02-10 | 2012-11-07 | 夏普株式会社 | Methods and devices for off axis halo reduction |
| CN103065609A (en) * | 2013-01-23 | 2013-04-24 | 深圳市华星光电技术有限公司 | Method of Gamma compensation towards display device and device of Gamma compensation |
| CN101650923B (en) * | 2008-08-14 | 2013-08-07 | 乐金显示有限公司 | Liquid crystal display and method of driving the same |
| US8520032B2 (en) | 2008-08-14 | 2013-08-27 | Lg Display Co. Ltd. | Liquid crystal display and method of driving the same |
| CN104008736A (en) * | 2013-02-26 | 2014-08-27 | 合肥京东方光电科技有限公司 | Apparatus for automatically adjusting gamma curve of LCD, and optical debugging apparatus |
| CN105023545A (en) * | 2014-04-18 | 2015-11-04 | 全方位数位影像开发股份有限公司 | Self-image correction device and method for liquid crystal display |
| CN105070252A (en) * | 2015-08-13 | 2015-11-18 | 小米科技有限责任公司 | Display brightness reducing method and device |
| CN105632447A (en) * | 2016-03-31 | 2016-06-01 | 青岛海信移动通信技术股份有限公司 | Display brightness adjustment method and device of liquid crystal display |
| CN106128371A (en) * | 2016-09-08 | 2016-11-16 | 京东方科技集团股份有限公司 | A kind of device, display device and the method that picture brightness strengthens |
| CN108831366A (en) * | 2018-06-26 | 2018-11-16 | 武汉天马微电子有限公司 | A kind of display device and its display driving method |
| CN111540317A (en) * | 2020-06-19 | 2020-08-14 | 广州视源电子科技股份有限公司 | Brightness control method and device, storage medium and related equipment |
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- 2006-12-01 CN CNA2006101684070A patent/CN101191926A/en active Pending
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| US9378689B2 (en) | 2008-08-14 | 2016-06-28 | Lg Display Co., Ltd. | Liquid crystal display and method of driving the same |
| CN101650923B (en) * | 2008-08-14 | 2013-08-07 | 乐金显示有限公司 | Liquid crystal display and method of driving the same |
| CN102770797A (en) * | 2010-02-10 | 2012-11-07 | 夏普株式会社 | Methods and devices for off axis halo reduction |
| CN102770797B (en) * | 2010-02-10 | 2015-09-09 | 夏普株式会社 | For reducing the method and apparatus from axle halation |
| CN102377939B (en) * | 2010-08-05 | 2015-03-25 | 奥林巴斯映像株式会社 | Shooting device and image reappearance device |
| CN102377939A (en) * | 2010-08-05 | 2012-03-14 | 奥林巴斯映像株式会社 | Shooting device and image reappearance device |
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| US9607478B2 (en) | 2010-11-10 | 2017-03-28 | Universal Entertainment Corporation | Gaming machine running common game |
| WO2014113997A1 (en) * | 2013-01-23 | 2014-07-31 | 深圳市华星光电技术有限公司 | Method for implementing gamma compensation on display and gamma compensation device |
| CN103065609A (en) * | 2013-01-23 | 2013-04-24 | 深圳市华星光电技术有限公司 | Method of Gamma compensation towards display device and device of Gamma compensation |
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| CN104008736B (en) * | 2013-02-26 | 2017-07-07 | 合肥京东方光电科技有限公司 | Automatically adjust device, the optics debugging apparatus of liquid crystal display gamma curve |
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| WO2022166449A1 (en) * | 2021-02-04 | 2022-08-11 | 深圳Tcl数字技术有限公司 | Display brightness control method and apparatus, and terminal and computer-readable storage medium |
| CN113393804A (en) * | 2021-06-21 | 2021-09-14 | 深圳市华星光电半导体显示技术有限公司 | High-brightness display device and brightness adjusting method thereof |
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