CN101192389A - LCD device and its contrast adjusting apparatus and method - Google Patents
LCD device and its contrast adjusting apparatus and method Download PDFInfo
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- CN101192389A CN101192389A CNA2006101639554A CN200610163955A CN101192389A CN 101192389 A CN101192389 A CN 101192389A CN A2006101639554 A CNA2006101639554 A CN A2006101639554A CN 200610163955 A CN200610163955 A CN 200610163955A CN 101192389 A CN101192389 A CN 101192389A
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Abstract
The invention discloses a liquid crystal display, a contrast adjusting device and a method thereof. The contrast adjusting device and the method disclosed by the invention correct the contrast value of the liquid crystal display at any time according to the brightness variation of surrounding environment of the liquid crystal display so as to ensure that the liquid crystal display presents the brightness of the displayed pictures with the largest comfort to users.
Description
Technical field
The present invention is about a kind of contrast adjusting gear and method thereof of LCD, and is particularly to a kind of can the variation according to the brightness of LCD context, and revises the contrast adjusting gear and the method thereof of correlative value 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.
Now to be engaged in TFT-LCD those skilled in the relevant art, it is when the brightness curve of definition of T FT-LCD, all be to finish under (darkroom) environment in the darkroom, the luminance contrast of the display frame of revising TFT-LCD by this and being presented is to allow user's eyes feel that the most comfortable goes the display frame of watching TFT-LCD to be presented.
What deserves to be mentioned is that at this above-mentioned brightness curve is exactly luminance contrast (brightnesscontrast) in fact, it may be defined as the dynamic ratio between black and white.For instance, when the luminance contrast of TFT-LCD was 1020, the dynamic ratio that can know by inference between its black and white according to above-mentioned definition was exactly 1020, that is to say: if the numerical value that this moment, definition was black earlier is 1 o'clock, so white numerical value is exactly 1020.
Yet, because when the brightness curve of definition of T FT-LCD, its luminance contrast is changeless, so when TFT-LCD is in context brightness when very dark, it is suitable dazzling that user's eyes will be felt this moment, but in the time of under TFT-LCD is in bright environment, it might the constant luminance contrast deficiency of said fixing, and allow display frame mist mist, ash ash that the user thinks that TFT-LCD presented, the appearance that loses count of is arranged can feel quite uncomfortable so that user's eyes are seen this picture situation.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of contrast adjusting gear and method thereof, and it changes by the brightness according to the LCD context, and revises the required correlative value of contrast of definition vision signal.
Another object of the present invention just provides a kind of LCD, it is by being used in contrast adjusting gear and method thereof that the invention described above proposed wherein, LCD just can change according to the brightness of its context by this, at any time revise its brightness contrast value, watch to the user with the display frame brightness that presents the most comfortable.
Based on above-mentioned and other purpose, contrast adjusting gear provided by the present invention comprises surround lighting processing unit, contrast correction processor, and system central processor.Wherein, the surround lighting processing unit can change and the output luminance signal according to the brightness of contrast engagement positions context.The luminance signal that the contrast correction processor can be exported according to the surround lighting processing unit, and revise the correlative value that it is exported.System central processor can be according to contrast correction processor correction correlative value later, and defines the luminance contrast of the vision signal that system central processor receives.
From another viewpoint, LCD provided by the present invention comprises contrast adjusting gear and display panels.Wherein, the contrast adjusting gear can change according to the brightness of LCD context, and revises the required correlative value of luminance contrast of definition vision signal.Display panels then can be according to the luminance contrast of above-mentioned vision signal the display video signal picture.
From another viewpoint, contrast 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 correlative value of luminance contrast of correction definition vision signal.
Contrast adjusting gear provided by the present invention and method thereof, it goes in now the LCD, because contrast adjusting gear provided by the present invention and method thereof are the brightness variations according to the LCD context, at any time revise its correlative value, watch to the user with the display frame brightness that allows LCD present the most comfortable.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, the present invention's cited below particularly preferred embodiment, 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 process flow diagram according to the contrast method of adjustment of preferred embodiment of the present invention.
Embodiment
The technology effect that the present invention desired to reach is for solving existing TFT-LCD because its luminance contrast (brightness contrast) is changeless, so it is in light or brightness very dark following time of environment, uncomfortable shortcoming when the brightness meeting of its shown picture causes human eye to watch, 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 Thin Film Transistor-LCD, TFT-LCD) 100 comprise contrast adjusting gear 101, video signal generator 103 to LCD, and display panels 105.Wherein, contrast adjusting gear 101 can change according to the brightness LS_int of LCD 100 contexts, and the required correlative value (contrastvalue) of luminance contrast (brightness contrast) of the vision signal VS that correction 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 luminance contrast of above-mentioned vision signal VS.
In present embodiment, contrast adjusting gear 101 comprises surround lighting processing unit 101a, contrast correction processor 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 contrast correction processor 101b.
Afterwards, after contrast correction processor 101b receives luminance signal IS, the look-up table of The built-in (lookup table does not illustrate) is can be according to this luminance signal IS corresponding finds out an environment correlative value, and 101b revises the correlative value of being exported according to this for the contrast correction processor.By this, the central controller 101c of system (for example being vision signal IC) then revises correlative value later according to contrast correction processor 101b, and the brightness contrast value of video signal generator 103 provides to its vision signal VS is provided, the brightness contrast value display video signal picture of the vision signal VS after will defining by display panels 105 is so again watched to the user.
And well known be, above-mentioned so-called luminance contrast (brightness contrast), it may be defined as the dynamic ratio between black and white.For example, when the luminance contrast of the display frame that is presented when LCD 100 was 500, the dynamic ratio that can know by inference between its black and white according to above-mentioned definition was exactly 1: 500.And what deserves to be mentioned is that the contrast adjusting gear 101 of present embodiment not only can be revised white numerical value, and can also revise black numerical value.For example, judging and contrast will be revised to 1000 the time from 500 when contrast adjusting gear of the present invention 101, can resize ratio be 1: 1000 or 0.5: 500.Yet, in embodiment preferably, mostly be the numerical value of revising white, only the present invention does not do this restriction.By the above embodiments as can be known, the luminance contrast of the display frame that the present invention can opaquing fluid crystal display 100 be presented, and feel the most comfortable when allowing the user watch LCD 100.
What deserves to be mentioned is at this, in be built in the look-up table of contrast correction processor 101b, it is process by experiment, what change in lumen (lumen) scope with the brightness LS_int that defines when LCD 100 contexts, it finds out pairing environment correlative value, by this so that the display frame brightness that LCD 100 is presented allows human eye feel the most comfortable.
Fig. 2 is the contrast method of adjustment according to preferred embodiment of the present invention, the method is applicable to LCD, it comprises the following steps: at first, as described in step S201, provides OPTICAL SENSORS (light sensor) to change with the brightness of detecting LCD context.Then, as described in step S203, according to the brightness variation of LCD context, and correspondence is found out an environment correlative value in look-up table.At last, as described in step S205, revise the required correlative value of luminance contrast of definition vision signal according to this environment correlative value.
According to the simpler saying of above steps be exactly: LCD can change according to the brightness of context instantly; and the required correlative value (contrast value) of luminance contrast of the vision signal of correction definition at any time; by this so long as utilize the brightness of context to change; and correction defines the notion of the required correlative value of the luminance contrast of vision signal, and it all belongs within the scope of institute of the present invention desire protection.
In sum, contrast adjusting gear 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 revise the correlative value that the contrast correction processor is exported at any time, so no matter LCD is to be in bright environment or darkroom, the display frame brightness that it presented all can allow human eye feel the most comfortable.
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. contrast adjusting gear comprises:
One surround lighting processing unit is exported a luminance signal according to the brightness variation of this contrast engagement positions context;
One contrast correction processor is electrically coupled to this surround lighting processing unit, revises the correlative value that this contrast correction processor is exported according to this luminance signal; And
One system central processor is electrically coupled to this contrast correction processor, defines the luminance contrast of the vision signal that this system central processor receives according to this correlative value.
2. contrast adjusting gear 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. contrast adjusting gear as claimed in claim 1, it is characterized in that, the built-in look-up table of this contrast correction processor, this look-up table are corresponding according to this luminance signal finds out an environment correlative value, revises this correlative value of being exported according to this for this contrast correction processor.
4. contrast adjusting gear as claimed in claim 1 is characterized in that, this system's central controller comprises a vision signal IC.
5. LCD comprises:
One contrast adjusting gear according to the brightness variation of this LCD context, and is revised the required correlative value of luminance contrast that defines a vision signal; And
Display panels is electrically coupled to this contrast adjusting gear, shows a vision signal picture according to the luminance contrast of this vision signal.
6. LCD as claimed in claim 5 is characterized in that, this contrast adjusting gear comprises:
One surround lighting processing unit is exported a luminance signal according to this brightness variation of this contrast engagement positions context;
One contrast correction processor is electrically coupled to this surround lighting processing unit, revises the correlative value that this contrast correction processor is exported according to this luminance signal; And
One system central processor is electrically coupled to this contrast correction processor, defines the luminance contrast of the vision signal that this system central processor receives according to this correlative value.
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 contrast correction processor, this look-up table are corresponding according to this luminance signal finds out an environment correlative value, revises this correlative value of being exported according to this for this contrast correction processor.
10. LCD as claimed in claim 6 is characterized in that, this system's central controller comprises a vision signal IC.
11. a contrast method of adjustment, this method is applicable to a LCD, comprises the following steps:
Detecting the brightness of one of this LCD context changes; And
Change and the required correlative value of luminance contrast of correction definition one vision signal according to this brightness.
12. contrast 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. contrast method of adjustment as claimed in claim 11 is characterized in that, also comprises the following steps: in the step of this required correlative value of the luminance contrast of revising this vision signal of definition according to this luminance signal
Correspondence is found out an environment correlative value in a look-up table according to this brightness variation; And
Revise this required correlative value of luminance contrast of this vision signal of definition according to this environment correlative value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101639554A CN101192389A (en) | 2006-11-30 | 2006-11-30 | LCD device and its contrast adjusting apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101639554A CN101192389A (en) | 2006-11-30 | 2006-11-30 | LCD device and its contrast adjusting apparatus and method |
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| CN101192389A true CN101192389A (en) | 2008-06-04 |
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| CNA2006101639554A Pending CN101192389A (en) | 2006-11-30 | 2006-11-30 | LCD device and its contrast adjusting apparatus and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8624939B2 (en) | 2009-11-20 | 2014-01-07 | Innocom Technology (Shenzhen) Co., Ltd. | Liquid crystal display device and driving method thereof |
| CN104915166A (en) * | 2015-03-20 | 2015-09-16 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN108062939A (en) * | 2016-11-09 | 2018-05-22 | 株式会社半导体能源研究所 | The method of work of electronic equipment |
| CN109493831A (en) * | 2018-12-05 | 2019-03-19 | 青岛海信电器股份有限公司 | A kind of processing method and processing device of picture signal |
-
2006
- 2006-11-30 CN CNA2006101639554A patent/CN101192389A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8624939B2 (en) | 2009-11-20 | 2014-01-07 | Innocom Technology (Shenzhen) Co., Ltd. | Liquid crystal display device and driving method thereof |
| CN104915166A (en) * | 2015-03-20 | 2015-09-16 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN104915166B (en) * | 2015-03-20 | 2019-02-05 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN108062939A (en) * | 2016-11-09 | 2018-05-22 | 株式会社半导体能源研究所 | The method of work of electronic equipment |
| CN109493831A (en) * | 2018-12-05 | 2019-03-19 | 青岛海信电器股份有限公司 | A kind of processing method and processing device of picture signal |
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Open date: 20080604 |