CN102568383A - Method for improving nonuniformity of brightness of OLED (organic light-emitting diode) display panel - Google Patents
Method for improving nonuniformity of brightness of OLED (organic light-emitting diode) display panel Download PDFInfo
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- CN102568383A CN102568383A CN2012100325606A CN201210032560A CN102568383A CN 102568383 A CN102568383 A CN 102568383A CN 2012100325606 A CN2012100325606 A CN 2012100325606A CN 201210032560 A CN201210032560 A CN 201210032560A CN 102568383 A CN102568383 A CN 102568383A
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Abstract
The invention relates to a method for improving the nonuniformity of brightness of an OLED (organic light-emitting diode) display panel. The method comprising the steps of processing collected image data to be displayed in RGB (red green blue) 565 form and separating the levels values of red, green and black of each row of pixel points; obtaining an average value of the levels of the three colors of all the pixel points of each row, and taking the average value as a reference value of current consumed by the three colors of the entire row; comparing the reference value with the levels value of the three colors of each pixel point in the row, and if deviation exists, adding or subtracting a weighting coefficient of the corresponding levels until the comparison with all the points is completed; obtaining corrected image data based on the weighting values; outputting the corrected image data to a driving circuit; and outputting the image data. By adopting the method disclosed by the utility model, the three primary colors of all the points of the displayed image can be treated, and the levels values of red, green and black can be regulated to strengthen the output current of low-brightness pixel points or to weaken the output current of high-brightness pixel points, thereby making up the problem that the brightness of pixel points of an OLED liquid crystal screen is nonuniform due to the crossed interference of current with partial pressure.
Description
Technical field
The present invention relates to the OLED display technique, particularly a kind of method that is used to improve OLED display panel brightness disproportionation.
Background technology
OLED, i.e. Organic Light Emitting Diode (Organic Light-Emitting Diode), its display technique is different with traditional LCD display mode; Need not backlight; Adopt extremely thin coating of organic material and glass substrate, 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.
But because OLED display technique immature now; Also there are some problems in OLED, except since the public formation cross effect of electrode, the positive and negative charge charge carrier is compounded to form luminous mechanism and makes any two light emitting pixels in the organic EL display panel; As long as forming any functional membrane of their structures directly links together; Just have the phenomenon of crosstalking each other between those two light emitting pixels, promptly a pixel is luminous, and one other pixel also possibly sent faint light.This phenomenon mainly is that the lateral isolation property difference of film causes because the organic functional thin film thickness evenness is poor.
Summary of the invention
Problem in view of above-mentioned prior art exists the purpose of this invention is to provide a kind of method that is used to improve OLED display panel brightness disproportionation.The Chromatically compensated scheme of taking, little cost remedies the defective on the liquid crystal to try one's best.This method can effectively reduce the brightness disproportionation situation on the OLED screen, and helps reducing cost, and satisfies the requirement of using simultaneously, to solve the color error ratio that oled panel occurs when showing than the hard image data.
The technical scheme that the present invention takes is: a kind of method that is used to improve OLED display panel brightness disproportionation, it is characterized in that, and comprise the steps:
(1), RGB565 format-pattern data to be shown that the acquisition process chip is collected process, and separate R, G, the B three look color range values of each row pixel;
Get three look color range mean values of each row pixel, with this reference value as full line three looks institute current sinking (two), respectively;
(3), three look color range mean values and the three look color range values of the every bit on this row of each row pixel are compared, as if deviation being arranged, then add or deduct the weighting coefficient of corresponding color range with three look color range mean values, until with have a few and relatively finish;
(4), R, G, B three look color range values after comprehensive each pixel weighting again, draw calibration image data;
(5), the view data after the output calibration is to driving circuit;
(6), view data output.
The beneficial effect that the present invention produced is: take this method can the three primary colors that display image is had a few be processed; Color range value through adjustment R, G, B three looks strengthens the output current of low-light level pixel; Or weaken high luminance pixel point output current, thereby remedy the OLED liquid crystal display pixel brightness disproportionation problem that causes by crosstalking of dividing potential drop electric current.
Description of drawings
Fig. 1 connects synoptic diagram for hardware configuration of the present invention.
Fig. 2 is R, G, B three look color ranges and change in current relation curve synoptic diagram.
Fig. 3 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.As shown in Figure 1; This method adopts collection and the process chip of the S3C2442 chip of a slice Samsung as view data; The S3C2442 chip links to each other with the UGS6028OLED display screen through spi bus; This display screen inside is done image by an EPS525 liquid crystal display drive circuit driving OLED liquid crystal display and is shown that display pixel can reach 160x128.
As shown in Figure 3, a kind of method that is used to improve OLED display panel brightness disproportionation comprises the steps:
(1), RGB565 format-pattern data to be shown that the acquisition process chip is collected process, and separate R, G, the B three look color range values of each row pixel;
Get three look color range mean values of each row pixel, with this reference value as full line three looks institute current sinking (two), respectively;
(3), three look color range mean values and the three look color range values of the every bit on this row of each row pixel are compared, as if deviation being arranged, then add or deduct the weighting coefficient of corresponding color range with three look color range mean values, until with have a few and relatively finish;
(4), R, G, B three look color range values after comprehensive each pixel weighting again, draw calibration image data;
(5), the view data after the output calibration is to driving circuit;
(6), view data output.
Because the OLED liquid crystal display adopts self luminous form, each pixel all is made up of a light emitting diode, in the pattern that adopts line scanning; The pixel of one full line can be regarded as the small resistor of row's series connection; Because the current value of full line is constant, when the high pixel of liquid crystal display display brightness, the electric current that this point is got is bigger; The electric current that the low pixel of brightness is got is less, and the influence of this dividing potential drop electric current causes the color range on the response pixel to occur departing from.This method is based on the OLED liquid crystal can show RGB565 format-pattern data, and the view data of every bit is formed by R, G, B three looks (RGB), and an one point data accounts for two bytes.
R, G, the B three look color ranges of each pixel in the band display image data are separated; For example: the grey color range of a RGB565 is 0xEF5D; Its binary code is 1110111101011101, R, G, B three look color ranges is separated the binary code that draws for Wei not R:11101; G:111010; B:11101 is converted into 16 systems and is respectively R:0x1D; G:0x3A; B:0x1D, Here it is should the ash color dot three look color ranges, the pairing output current of different values is also inequality.
The principal element that influences the color range deviation has 2 points: 1. three look color ranges and change in current relation; 2. the dividing potential drop electric current is checked colors between the zone of influence of order range.
As shown in Figure 2, because R, G, B three look color ranges are non-linear with the change in current relation, and G look color range in the RGB565 model is the twice of other two kinds of colors, so the weighted value of green is wanted height than other dichromatism.Can find out also that by Fig. 2 color range is high more, the influence that current voltage distribution caused is big more.In like manner; When the dividing potential drop electric current increased, the difference that the different colours color range is shown also can be more and more obvious, and dividing potential drop electric current weighting coefficients deviation also can be exponential increase; This also is the reason that this method will process respectively R, G, B three looks, because its influence that receives the dividing potential drop electric current also is different.
In addition; If with the span of each color range is 0～255 to be reference; In in the middle of the dividing potential drop electric current only is present in the influence of colour so 150; Because the some consumed current of low color range much at one, the difference on the color is also not obvious, and the dividing potential drop electric current can high not attended the meeting to the influence of color range generation emergent properties yet.The color range scope of RGB565 three looks, redness is 0x1f, is 32 rank; Green is 0x3f, is 64 rank; Blueness is 0x1f, is 32 rank, and the color range mean value of calculating redgreenblue thus is respectively 16,32,16, and promptly three look color range deviations of every capable pixel the most very much not can surpass 16,32,16.Drawn the weighting coefficient of three look color ranges thus, promptly the weighting coefficient of R is 0～16, and the weighting coefficient of G is 0～32; The weighting coefficient of B is 0～16; How many concrete weighting coefficients gets according to the decision of used input current size, and generally speaking, the weighting coefficient of R look is 2; The weighting coefficient of G look is 4, and the weighting coefficient of B look is 2.
For example: used input current is 7.2V, when the R of pixel color range value during greater than the mean value of 160 points of full line, promptly deducts a weighting coefficient 2, when the R of pixel color range value during less than the mean value of 160 points of full line, promptly adds a weighting coefficient 2; When the G of pixel color range value during greater than the mean value of 160 points of full line, promptly deduct a weighting coefficient 4, when the G of pixel color range value during, promptly add a weighting coefficient 4 less than the mean value of 160 points of full line; When the B of pixel color range value during greater than the mean value of 160 points of full line, promptly deduct a weighting coefficient 2, when the B of pixel color range value during, promptly add a weighting coefficient 2 less than the mean value of 160 points of full line.
This method rounds the mean value of 160 points of row respectively to three look color ranges; With this reference value as full line three looks institute current sinking; Respective pixel values with these three reference values and each point of this row compares, and according to the departure degree of respective pixel values and reference value this pixel value is done weighting (adding or deduct a weighting coefficient) again, three look color ranges is combined into the RGB565 format-pattern calibration data of two bytes at last again; At this moment; The color range of bright image vegetarian refreshments will be weakened, and the color range of dark pixel point will be enhanced, and can offset the influence that each pixel load current dividing potential drop causes based on this calibration value.
This method can be used in the OLED liquid crystal display drive circuit design of each size, and the luminance deviation that the self-adaptation different colours is brought divides other colour deviation to calibrate to R, G, B three looks in each pixel.
Claims (1)
1. a method that is used to improve OLED display panel brightness disproportionation is characterized in that, comprises the steps:
(1), RGB565 format-pattern data to be shown that the acquisition process chip is collected process, and separate R, G, the B three look color range values of each row pixel;
Get three look color range mean values of each row pixel, with this reference value as full line three looks institute current sinking (two), respectively;
(3), three look color range mean values and the three look color range values of the every bit on this row of each row pixel are compared, as if deviation being arranged, then add or deduct the weighting coefficient of corresponding color range with three look color range mean values, until with have a few and relatively finish;
(4), R, G, B three look color range values after comprehensive each pixel weighting again, draw calibration image data with this;
(5), the view data after the output calibration is to driving circuit;
(6), view data output.
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| CN104954767A (en) * | 2014-03-26 | 2015-09-30 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN106157889A (en) * | 2016-08-15 | 2016-11-23 | 昆山国显光电有限公司 | Improve the method and device of OLED display brightness uniformity |
| CN107784991A (en) * | 2017-11-11 | 2018-03-09 | 安徽质在智能科技有限公司 | A kind of method of automated imaging amendment |
| CN108022566A (en) * | 2016-11-01 | 2018-05-11 | 三星电子株式会社 | Display-driver Ics and the display driving system for including it |
| CN110444176A (en) * | 2019-07-26 | 2019-11-12 | 厦门天马微电子有限公司 | The pixel aberration compensation method and system of display panel, display device |
| CN110648628A (en) * | 2019-09-29 | 2020-01-03 | 联想(北京)有限公司 | Display processing method, display processing device and electronic equipment |
| CN111145686A (en) * | 2020-02-28 | 2020-05-12 | 厦门天马微电子有限公司 | Pixel driving circuit, display panel and driving method |
| CN114512104A (en) * | 2022-04-20 | 2022-05-17 | 宏齐光电子(深圳)有限公司 | Control method and device for energy-saving LED mobile phone backlight source |
| WO2023202173A1 (en) * | 2022-04-18 | 2023-10-26 | 惠州视维新技术有限公司 | Brightness adjustment method and apparatus, and computer device and computer-readable storage medium |
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| CN108022566A (en) * | 2016-11-01 | 2018-05-11 | 三星电子株式会社 | Display-driver Ics and the display driving system for including it |
| CN108022566B (en) * | 2016-11-01 | 2021-12-07 | 三星电子株式会社 | Display driver integrated circuit and display driving system including the same |
| CN107784991A (en) * | 2017-11-11 | 2018-03-09 | 安徽质在智能科技有限公司 | A kind of method of automated imaging amendment |
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| CN110444176A (en) * | 2019-07-26 | 2019-11-12 | 厦门天马微电子有限公司 | The pixel aberration compensation method and system of display panel, display device |
| CN110648628A (en) * | 2019-09-29 | 2020-01-03 | 联想(北京)有限公司 | Display processing method, display processing device and electronic equipment |
| CN111145686A (en) * | 2020-02-28 | 2020-05-12 | 厦门天马微电子有限公司 | Pixel driving circuit, display panel and driving method |
| CN111145686B (en) * | 2020-02-28 | 2021-08-17 | 厦门天马微电子有限公司 | Pixel driving circuit, display panel and driving method |
| WO2023202173A1 (en) * | 2022-04-18 | 2023-10-26 | 惠州视维新技术有限公司 | Brightness adjustment method and apparatus, and computer device and computer-readable storage medium |
| CN114512104A (en) * | 2022-04-20 | 2022-05-17 | 宏齐光电子(深圳)有限公司 | Control method and device for energy-saving LED mobile phone backlight source |
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Application publication date: 20120711 |