CN100487783C - Gamma correction and system with this gamma correction - Google Patents
Gamma correction and system with this gamma correction Download PDFInfo
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- CN100487783C CN100487783C CNB2005101162362A CN200510116236A CN100487783C CN 100487783 C CN100487783 C CN 100487783C CN B2005101162362 A CNB2005101162362 A CN B2005101162362A CN 200510116236 A CN200510116236 A CN 200510116236A CN 100487783 C CN100487783 C CN 100487783C
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Abstract
This invention relates to a brightness correction method for one display panel which comprises the following steps: a, in display panel it displays multiple image areas with different display colors; b, testing image area responding to different grey step value with relative Gamma voltage; finally, according to tested grey values adjusting above grey value with Gamma voltage.
Description
Technical field
The present invention is particularly to a kind of brightness correcting method and system relevant for a kind of bearing calibration and system.
Background technology
Because LCD (Liquid Crystal Display; The advantage of thin, the in light weight and low electromagnetic of volume LCD) is in day by day being extensive use of in recent years.For LCD, because the lower plate of liquid crystal panel and the cross-pressure between the lower plate and light transmittance are not linear, therefore work as digital picture element data to display, when converting the voltage signal that inputs to the liquid crystal both sides to, must carry out the action of Gamma voltage correction, to reduce the color distortion of LCD.
The image that general LCD is presented is made up of three primary colors (RGB), so when carrying out the action of Gamma voltage correction, need to carry out the Gamma voltage correction at three primary colors respectively, make the single display panel when carrying out the action of Gamma voltage correction, in the time of may costing 10 ~ 15 minutes.
Because the Gamma voltage correction of display panel need spend the considerable time, so when display panel is produced in a large number, can't carry out the action of Gamma voltage correction at each display panel.Therefore, the manufacturer of most LCD can obtain the Gamma voltage of one group of standard in development, and then utilizes the Gamma voltage of this group standard, and direct burning is in each display panel.
But the characteristic of each display panel might not be identical, therefore, when each display panel all utilizes the Gamma voltage of this standard, will cause the problems such as display color generation form and aspect difference, colour cast or colour temperature deviation of display panel easily.
Summary of the invention
In view of this, the invention provides a kind of brightness correcting method, be applicable to a display panel.At first, in display panel, show a plurality of imagery zones according to display color, the display color that the display color that wherein arbitrary imagery zone has and remaining imagery zone have is all inequality.Then, detect the brightness value that imagery zone is presented corresponding to different GTG values, wherein above-mentioned GTG value has corresponding Gamma voltage respectively.At last, according to detected brightness value, adjust the pairing Gamma voltage of above-mentioned GTG value.
In addition, the present invention also provides a kind of gamma correction system, comprises a display panel, a luminance detection device and a treating apparatus.Display panel is in order to show a plurality of imagery zones according to display color, the display color that the display color that wherein arbitrary imagery zone has and remaining imagery zone have is all inequality.Luminance detection device detects the brightness value that imagery zone is presented corresponding to different GTG values, and wherein above-mentioned GTG value has corresponding Gamma voltage respectively.Treating apparatus is adjusted the pairing Gamma voltage of above-mentioned GTG value according to detected brightness value.
Because the present invention measures the briliancy of a plurality of imagery zones simultaneously, so can be widely time of Gamma voltage correction be reduced to 2 minutes.When luminance detection device when five GTG values just detect one time, also can shorten the time of Gamma voltage correction.When the time of Gamma voltage correction is significantly reduced, then can when producing display panel, carry out the action of Gamma voltage correction in the lump.After each display panel all carried out the action of Gamma voltage correction, can reduce the possibility of form and aspect difference, colour cast or the colour temperature deviation of display panel.
Description of drawings
For above-mentioned and other purposes of the present invention, feature and advantage can also be become apparent, cited below particularlyly go out preferred embodiment, and conjunction with figs., be described in detail below:
Fig. 1 illustrates the process flow diagram of brightness correcting method of the present invention.
Fig. 2 illustrates the synoptic diagram of gamma correction of the present invention system.
Embodiment
Fig. 1 illustrates the process flow diagram of brightness correcting method of the present invention.Brightness correcting method of the present invention is applicable to the display panel of a LCD.At first, provide an input signal group to display panel, make it show a plurality of imagery zones (step S110), wherein, each imagery zone has different display colors respectively.
Above-mentioned input signal group is in order to the display position and the display color of control imagery zone, and it can be provided or be provided by an external device (ED) by the control device in the display panel.When the input signal group was provided by an external device (ED), then the said external device can pass through DVI (digital visual interface), and the input signal group is offered display panel.
The image that general LCD is presented is made up of three primary colors (R, G, B), so when carrying out gamma correction, by the input signal group, can make display panel show three imagery zones, presents three primary colors respectively.Also can make display panel only present two imagery zones, it presents RG, GB or RB respectively, in order to shorten the time of gamma correction.To be example below, be illustrated brightness correcting method of the present invention with three imagery zones.
Then, provide the GTG value (i=0) on first rank to give each imagery zone (step S120).Suppose that above-mentioned LCD has 8 data driver, then will produce 256 GTG values.Each GTG value all has the Gamma voltage of a correspondence.Imagery zone can present corresponding briliancy (luminance) according to the GTG value that is received.
Then, detect three briliancy that imagery zone presented (step S130).General briliancy can be by three measuring junctions with a surveying instrument, contact imagery zone one to one and get, or utilize non-contacting mode to measure the briliancy in video picture zone.
Then, judge that whether the GTG value is greater than 255 (step S140).When GTG value that imagery zone received was not more than 255, then execution in step S150 continued to provide another GTG value to imagery zone.When imagery zone received another GTG value, execution in step S130 then continued to detect the briliancy of imagery zone.
In step S150, n can be any number.When n equaled 1, then expression provided 256 GTG values to imagery zone in regular turn.When n equaled 2, then expression provided the GTG value of even-order to imagery zone.When the numerical value of n more hour, then the degree of accuracy of the gamma correction of display panel is higher.When the numerical value of n is healed when big, then the time of the gamma correction of display panel is shorter.
When GTG value that imagery zone received greater than 255 the time, execution in step S160 then, when receiving different GTG value, the brightness value that is detected is recorded in the table of corrections with imagery zone.Operating personnel can adjust the pairing Gamma voltage of each GTG value (step S170) according to the brightness value in the table of corrections.
At last, with adjusted Gamma store voltages (step S190) in a medium, wherein, can be in the memory storage of display panel with adjusted Gamma store voltages, so, when LCD is desired to present image, then can be by in the memory storage (for example EEPROM), acquisition Gamma voltage.
Because imagery zone is when receiving different GTG value, the brightness value that it presented is recorded in the table of corrections, and therefore, the Ke Yi of the manufacturer different requirements of customers of LCD is adjusted the pairing Gamma voltage of above-mentioned GTG value.
In addition, brightness correcting method of the present invention can be applicable in the software, in order to the brightness of the display panel of proofreading and correct each LCD.
Fig. 2 illustrates the synoptic diagram of gamma correction of the present invention system.As shown in the figure, the gamma correction system comprises, a display panel 22, a luminance detection device 24 and a treating apparatus 26.Display panel 22 is in order to show image zone 221 ~ 223.
Luminance detection device 24 (for example, color analysis instrument) has measuring junction 241 ~ 243, in the mode of contact or in non-contacting mode, detect the briliancy that imagery zone 221 ~ 223 is presented corresponding to different GTG values one to one, wherein above-mentioned GTG value has corresponding Gamma voltage respectively.In Fig. 2, measuring junction 241 ~ 243 detects the briliancy that imagery zone 221 ~ 223 is presented in the mode of contact.
Treating apparatus 26 (a for example desktop computer) is adjusted the pairing Gamma voltage of above-mentioned GTG value according to luminance detection device 24 detected brightness values.Adjusted Gamma voltage can be stored in the medium (for example EEPROM) of display panel 22.
In addition, in Fig. 2, treating apparatus 26 can pass through DVI connecting line 28, provides an input signal group to display panel 22, in order to the display position and the display color of definition imagery zone 221 ~ 223.Above-mentioned input signal group also can be provided by the control element (not shown) in the display panel 22.
Below will describe the operating principle of gamma correction system of the present invention in detail.Please refer to Fig. 2, at first, treating apparatus 26 couples display panel 22 by DVI connecting line 28, in order in display panel, and the display position in setting of image zone 221 ~ 223.Then, treating apparatus 26 provides a GTG value to display panel 22 by DVI connecting line 28, makes imagery zone 221 ~ 223 have different display colors respectively.
The GTG value that treating apparatus 26 can be exported luminance detection device 24 detected briliancy and itself is integrated in the table of corrections (look up table).The Ke Yi of the manufacturer different requirements of customers of LCD, by the pairing Gamma voltage of GTG value in the adjustment table of corrections, and then the briliancy of adjustment imagery zone.Adjusted Gamma voltage can be stored in the medium (not shown) of display panel 22.
Because the present invention measures the briliancy of a plurality of imagery zones simultaneously, so can be widely time of Gamma voltage correction be reduced to 2 minutes.When luminance detection device when five GTG values just detect one time, also can shorten the time of Gamma voltage correction.When the time of Gamma voltage correction is significantly reduced, then can when producing display panel, carry out the action of Gamma voltage correction in the lump.After each display panel all carried out the action of Gamma voltage correction, can reduce the possibility of form and aspect difference, colour cast or the colour temperature deviation of display panel.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when the change that can do some and modification, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (23)
1. a brightness correcting method is applicable to a display panel, and above-mentioned brightness correcting method comprises:
In described display panel, show a plurality of imagery zones according to display color, the display color that the display color that wherein arbitrary imagery zone has and remaining imagery zone have is all inequality;
Detect the brightness value that described imagery zone is presented corresponding to different GTG values, wherein said GTG value has corresponding Gamma voltage respectively; And
According to detected brightness value, adjust the pairing Gamma voltage of described GTG value.
2. brightness correcting method as claimed in claim 1 also comprises providing an input signal group to described display panel, in order to define described imagery zone.
3. brightness correcting method as claimed in claim 2 is characterized in that, display position and the display color of described input signal group in order to indicate described imagery zone.
4. brightness correcting method as claimed in claim 2 is characterized in that, described input signal group is provided by an external device (ED).
5. brightness correcting method as claimed in claim 4 is characterized in that, described external device (ED) sees through a DVI connecting line and couples described display panel.
6. brightness correcting method as claimed in claim 2 is characterized in that, described input signal group is provided by the control element in the described display panel.
7. brightness correcting method as claimed in claim 1 is characterized in that, the brightness value of described imagery zone is by with a plurality of measuring junctions of a surveying instrument, contacts described imagery zone one to one and gets.
8. bearing calibration as claimed in claim 1 is characterized in that, the brightness value of described imagery zone is by with a plurality of measuring junctions of a surveying instrument, detects described imagery zone in non-contacting mode one to one and gets.
9. bearing calibration as claimed in claim 1 also comprises adjusted described Gamma voltage, is recorded in the table of corrections.
10. bearing calibration as claimed in claim 9 also comprises, described table of corrections is stored in the medium.
11. bearing calibration as claimed in claim 10 is characterized in that, described medium is positioned at described display panel.
12. bearing calibration as claimed in claim 10 is characterized in that, described medium is an EEPROM.
13. bearing calibration as claimed in claim 1 is characterized in that the display color that described imagery zone presented is respectively red, green, blue.
14. a gamma correction system comprises:
One display panel, in order to show a plurality of imagery zones, the display color that the display color that wherein arbitrary imagery zone has and remaining imagery zone have is all inequality according to display color;
One luminance detection device, in order to detect the brightness value that described imagery zone is presented corresponding to different GTG values, wherein said GTG value has corresponding Gamma voltage respectively; And
One treating apparatus according to detected brightness value, is adjusted the pairing Gamma voltage of described GTG value.
15. gamma correction as claimed in claim 14 system is characterized in that described treating apparatus provides an input signal group to described display panel, in order to define described imagery zone.
16. gamma correction as claimed in claim 15 system is characterized in that display position and the display color of described input signal group in order to indicate described imagery zone.
17. gamma correction as claimed in claim 14 system is characterized in that, described treating apparatus sees through a DVI connecting line and couples described display panel.
18. gamma correction as claimed in claim 15 system is characterized in that described display panel also comprises a control element, in order to described input signal group to be provided.
19. gamma correction as claimed in claim 14 system is characterized in that described luminance detection device has a plurality of measuring junctions, contacts described imagery zone one to one, in order to detect the brightness value of described imagery zone.
20. gamma correction as claimed in claim 14 system is characterized in that described luminance detection device has a plurality of measuring junctions, detects the brightness value of described imagery zone one to one in non-contacting mode.
21. gamma correction as claimed in claim 14 system is characterized in that described display panel also comprises a medium, in order to store adjusted Gamma voltage.
22. gamma correction as claimed in claim 21 system is characterized in that described medium is an EEPROM.
23. gamma correction as claimed in claim 14 system is characterized in that the display color that described imagery zone presented is respectively red, green, blue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101162362A CN100487783C (en) | 2005-10-21 | 2005-10-21 | Gamma correction and system with this gamma correction |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101162362A CN100487783C (en) | 2005-10-21 | 2005-10-21 | Gamma correction and system with this gamma correction |
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| CN1953032A CN1953032A (en) | 2007-04-25 |
| CN100487783C true CN100487783C (en) | 2009-05-13 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655615B (en) * | 2008-08-21 | 2015-04-29 | 北京京东方光电科技有限公司 | Equipment and method for introducing test voltage |
| US8280184B2 (en) * | 2010-04-01 | 2012-10-02 | Himax Media Solutions, Inc. | Image enhancement method and apparatuses utilizing the same |
| CN103268745B (en) * | 2013-05-29 | 2016-01-20 | 北京时代奥视科技股份有限公司 | A kind of LCD monitor batch GAMMA bearing calibration and system |
| CN103926714B (en) * | 2013-06-28 | 2017-03-08 | 上海天马微电子有限公司 | A kind of display device gamma correction system and bearing calibration |
| CN103761945B (en) * | 2013-12-25 | 2016-02-24 | 深圳市华星光电技术有限公司 | A kind of gamma curve method of adjustment of TFT-LCD liquid crystal display and adjusting gear |
| CN103943092A (en) * | 2014-05-05 | 2014-07-23 | 广东威创视讯科技股份有限公司 | Screen color correction method and system for display unit |
| CN106448610B (en) * | 2016-12-13 | 2019-02-12 | 中航华东光电有限公司 | The method for solving colour cast under liquid crystal display low brightness signal |
| CN110400532A (en) * | 2018-04-25 | 2019-11-01 | 咸阳彩虹光电科技有限公司 | A kind of method and apparatus of quick adjustment gamma voltage |
| CN110428793B (en) * | 2019-07-09 | 2021-02-23 | 武汉精立电子技术有限公司 | Brightness correction system and method |
| CN111899689B (en) * | 2020-08-17 | 2021-09-10 | 云谷（固安）科技有限公司 | Brightness compensation method and compensation device of display panel |
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