CN101794552B - Method for increasing contrast of OLED display screen - Google Patents
Method for increasing contrast of OLED display screen Download PDFInfo
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- CN101794552B CN101794552B CN2010101205674A CN201010120567A CN101794552B CN 101794552 B CN101794552 B CN 101794552B CN 2010101205674 A CN2010101205674 A CN 2010101205674A CN 201010120567 A CN201010120567 A CN 201010120567A CN 101794552 B CN101794552 B CN 101794552B
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Abstract
The invention discloses a method for increasing the contrast of an OLED display screen, which comprises: firstly, determining the maximum value of the monochromatic brightness total values of a display signal; secondly, calculating the ratios of the maximum value to the monochromatic brightness reference values of all pixels, and dividing the obtained ratios into four ratio intervals which are divided in advance; thirdly, processing the ratios by using different nonlinear calibration modes according to different intervals; and finally, outputting the processed display signal to the OLED display screen for display. By increasing the brightness of the low-light part of a dark field and the brightness of the high-light part of a bright field, the method of the invention improves the detail display of the OLED display screen and increases image contrast, so that the OLED display screen can clearly display image frames in high light.
Description
Technical field
The present invention relates to a kind of OLED display screen contrast Enhancement Method, be applicable to the full-color and monochromatic display screen of PMOLED and AMOLED.
Background technology
OLED is Organic Light Emitting Diode (Organic Light-Emitting Diode), be called again organic electric laser show (Organic Electroluminesence Display, OELD).Because possess characteristics such as frivolous, power saving; Therefore since 2003; This display device has obtained widespread use on the MP3 player; And, just in some exhibitions, showed the engineering sample that adopts the OLED screen before this for DC that belongs to digital series products together and mobile phone, also do not enter into the stage of practical application.But the OLED screen has possessed the incomparable advantage of many LCD, so it is also had an optimistic view of by the insider always.
The OLED display technique is different with traditional LCD display mode, need not backlight, adopts extremely thin coating of organic material and glass substrate, and when electric current passed through, these organic materials will be luminous.And the OLED display screen can do lighter and thinnerly, and visible angle is bigger, and can significantly save electric energy.Compare with liquid crystal display, can save the size that shows module greatly, save cost.
But as display device, the OLED screen can receive the influence of environment for use equally.Particularly out of doors in the environment of high light, the display effect of OLED screen can descend equally to some extent.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art; A kind of OLED display screen contrast Enhancement Method is proposed; This method is hanged down the brightness of bright parts and the brightness of the high bright parts of bright field through increasing details in a play not acted out on stage, but told through dialogues, and the details of improving the OLED display screen shows, strengthens picture contrast; Even under high light, also can make OLED display screen display image picture clearly.
The objective of the invention is to solve through following technical scheme:
This OLED display screen contrast Enhancement Method, specifically according to following steps:
1) will import in each two field picture or the secondary picture in the shows signal of OLED display screen that the monochromatic brightness value of three kinds of colors of RGB adds up on all pixels, calculate the monochromatic brightness total value of three kinds of colors of RGB on all pixels respectively;
2) three groups of monochromatic brightness total values of comparison aforementioned calculation are confirmed value maximum in the monochromatic brightness total value;
3) with value maximum in the monochromatic brightness total value as benchmark, calculate the number percent of the maximum value of this monochromatic brightness total value with respect to the monochromatic brightness reference value of all pixels; Said monochromatic brightness reference value is that display resolution multiply by the value that obtains after 255;
4) divide four number percent intervals; Be respectively 0-25%, 25-50%, 50-75% and 75%-100%; The mapping curve that utilization matlab software is simulated four part desired brightness values and modification value respectively; And generate the curvilinear function in four intervals, and confirm the modification value that each brightness value is corresponding according to each curvilinear function, brightness value and modification value are made four look-up tables and storage;
5) confirm above-mentioned steps 3) in the percent value that calculates be arranged in which interval in above four intervals, according to this interval pairing look-up table, draw the corresponding modification value of current brightness value;
6) inciting somebody to action after treatment at last, shows signal outputs to the demonstration of OLED display screen.
Further, the above OLED display screen is full-color or monochromatic display screen.
Above-mentioned OLED display screen is passive type OLED screen or active OLED screen.
In above-mentioned steps 1) in, said shows signal is not for there being the treated original RGB three chromatic number numbers of it is believed that.
Above-mentioned steps 3) in, the percentage calculation value is approximate calculated value, keeps behind the radix point one or two.
The present invention hangs down the brightness of bright parts and the brightness of the high bright parts of bright field through increasing details in a play not acted out on stage, but told through dialogues, has effectively improved the details display effect of OLED display screen, has strengthened the contrast of image.Even guaranteed under high light, also can see the picture clearly that the OLED display screen shows.
Description of drawings
Fig. 1 is an OLED video data method of adjustment FB(flow block) of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment further detailed explanation is done in invention.
As shown in Figure 1, be OLED display screen contrast Enhancement Method process flow diagram of the present invention.Idiographic flow is following:
1) will there be treated original RGB three chromatic numbers according to shows signal (image or picture all are suitable for) input OLED display screen; The monochromatic brightness value of three kinds of colors of RGB on all pixels in each two field picture in the shows signal of input OLED display screen or the secondary picture is added up, calculate the monochromatic brightness total value of three kinds of colors of RGB on all pixels respectively;
2) three groups of monochromatic brightness total values that calculate more than the comparison are confirmed value maximum in the monochromatic brightness total value;
3) with step 2) in the monochromatic brightness total value maximum value calculate the number percent of the maximum value of this monochromatic brightness total value as benchmark with respect to the monochromatic brightness reference value of all pixels; This percentage calculation value is approximate calculated value, can keep behind the radix point one to two.Said monochromatic brightness reference value is that display resolution multiply by the value that obtains after 255, and for example the resolution of display screen is 160*128, and then the monochromatic brightness reference value is 160*128*255;
4) divide four number percent intervals; Be respectively 0-25%, 25-50%, 50-75% and 75%-100%; The mapping curve that utilization matlab software is simulated four part desired brightness values and modification value respectively; And generate the curvilinear function in four intervals, and confirm the modification value that each brightness value is corresponding according to each curvilinear function, brightness value and modification value are made four look-up tables and storage;
5) confirm above-mentioned steps 3) in the percent value that calculates be arranged in which interval in above four intervals, according to this interval pairing look-up table, draw the corresponding modification value of current brightness value;
6) inciting somebody to action after treatment at last, shows signal outputs to the demonstration of OLED display screen.
OLED display screen contrast Enhancement Method of the present invention is applicable to monochromatic and full-color OLED screen, is monochromatic OLED when shielding when what use, and the video data of being accepted has only the monochromatic brightness value, so can save step 2) in more peaked step.In addition, the OLED display screen that the present invention is directed to can be a passive type OLED screen, also can be active OLED screen.
Step 4) of the present invention and step 5) are that shows signal is carried out gamma correction; Drop on the interval shows signal of different weight percentage for percent value and adopt different gamma corrections; The gamma correction purpose is the brightness that will increase the low bright parts of details in a play not acted out on stage, but told through dialogues; Reduce the brightness of the high bright parts of bright field simultaneously, improve the display effect of details.
The present invention is through brightness that increases the low bright parts of details in a play not acted out on stage, but told through dialogues and the brightness that reduces the high bright parts of bright field, and the details of improving the OLED display screen shows, strengthens picture contrast.Even under high light, also can make OLED display screen display image picture clearly.
Claims (5)
1. an OLED display screen contrast Enhancement Method is characterized in that, according to following steps:
1) will import in each two field picture or the secondary picture in the shows signal of OLED display screen that the monochromatic brightness value of three kinds of colors of RGB adds up on all pixels, calculate the monochromatic brightness total value of three kinds of colors of RGB on all pixels respectively;
2) three groups of monochromatic brightness total values of comparison aforementioned calculation are confirmed value maximum in the monochromatic brightness total value;
3) with value maximum in the monochromatic brightness total value as benchmark, calculate the number percent of the maximum value of this monochromatic brightness total value with respect to the monochromatic brightness reference value of all pixels; Said monochromatic brightness reference value is that display resolution multiply by the value that obtains after 255;
4) divide four number percent intervals; Be respectively 0-25%, 25-50%, 50-75% and 75%-100%; The mapping curve that utilization matlab software is simulated four part desired brightness values and modification value respectively; And generate the curvilinear function in four intervals, and confirm the modification value that each brightness value is corresponding according to each curvilinear function, brightness value and modification value are made four look-up tables and storage;
5) confirm above-mentioned steps 3) in the percent value that calculates be arranged in which interval in above four intervals, according to this interval pairing look-up table, draw the corresponding modification value of current brightness value;
6) inciting somebody to action after treatment at last, shows signal outputs to the demonstration of OLED display screen.
2. OLED display screen contrast Enhancement Method according to claim 1 is characterized in that: said OLED display screen is full-color or monochromatic display screen.
3. OLED display screen contrast Enhancement Method according to claim 1 is characterized in that: said OLED display screen is passive type OLED screen or active OLED screen.
4. OLED display screen contrast Enhancement Method according to claim 1 is characterized in that: shows signal described in the step 1) is not for there being the treated original RGB three chromatic number numbers of it is believed that.
5. OLED display screen contrast Enhancement Method according to claim 1 is characterized in that: described percentage calculation value is approximate calculated value, keeps behind the radix point one or two.
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| CN2010101205674A CN101794552B (en) | 2010-03-09 | 2010-03-09 | Method for increasing contrast of OLED display screen |
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| CN2010101205674A CN101794552B (en) | 2010-03-09 | 2010-03-09 | Method for increasing contrast of OLED display screen |
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| CN101794552B true CN101794552B (en) | 2012-07-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102034431B (en) * | 2010-12-09 | 2012-11-21 | 广州杰赛科技股份有限公司 | Gamma correction method and device for LED |
| CN102568383A (en) * | 2012-02-14 | 2012-07-11 | 天津七一二通信广播有限公司 | Method for improving nonuniformity of brightness of OLED (organic light-emitting diode) display panel |
| CN105185351B (en) * | 2015-10-13 | 2017-07-28 | 深圳市华星光电技术有限公司 | Lift the method and system of OLED display panel contrast |
| CN106409226A (en) * | 2016-11-09 | 2017-02-15 | 深圳天珑无线科技有限公司 | Display screen residual image prevention method and device |
| CN112348906B (en) * | 2021-01-07 | 2021-04-06 | 卡莱特（深圳）云科技有限公司 | Method and device for recommending brightness loss percentage in LED screen correction process |
| CN114842807B (en) * | 2021-02-01 | 2023-11-17 | 广州视睿电子科技有限公司 | Brightness adjustment method, system, device and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1540606A (en) * | 2003-04-25 | 2004-10-27 | 胜园科技股份有限公司 | Driving device and method for automatic adjusting optimal brightness on display under restricted consumed power |
| US7081906B2 (en) * | 2001-12-27 | 2006-07-25 | Lg Electronics Inc. | Driving method and device for flat panel display |
| CN101207709A (en) * | 2006-12-22 | 2008-06-25 | 深圳创维－Rgb电子有限公司 | Method, device and equipment for regulating gamma curviline |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7081906B2 (en) * | 2001-12-27 | 2006-07-25 | Lg Electronics Inc. | Driving method and device for flat panel display |
| CN1540606A (en) * | 2003-04-25 | 2004-10-27 | 胜园科技股份有限公司 | Driving device and method for automatic adjusting optimal brightness on display under restricted consumed power |
| CN101207709A (en) * | 2006-12-22 | 2008-06-25 | 深圳创维－Rgb电子有限公司 | Method, device and equipment for regulating gamma curviline |
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