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A Method for Improving the Uneven Phenomenon of OLED Display

A phenomenon, uniform technology, applied in the field of OLED image display, to achieve the effect of improving display unevenness, ensuring layering, and improving OLED display unevenness

Active Publication Date: 2019-07-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solution to OLED display unevenness mainly tends to solve the brightness difference caused by the first reason, but there is no report on the solution to the brightness difference caused by the second reason

Method used

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  • A Method for Improving the Uneven Phenomenon of OLED Display
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  • A Method for Improving the Uneven Phenomenon of OLED Display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Taking an OLED display with a maximum gray scale of 256 and a resolution of 640×480 as an example, the specific steps of the method for improving the display unevenness are as follows:

[0075] Step 101, selecting pixels. First, the full screen area is divided into 160×120 regions, that is, the size of each region is 4×4, and the pixel at the center of each region is used as the selected pixel, then a total of 160×120 pixels are selected, which is called These pixels are typical pixels.

[0076] Step 102, record the equivalent working time in real time. The selected standard brightness is the initial brightness of the monitor displaying 128 gray scales. For a certain pixel point in the typical pixel point, use formula 1 to calculate the equivalent working time of one frame corresponding to the pixel point within the current frame time, and then compare it with the The equivalent working time of pixels is superimposed to obtain a new equivalent working time.

[0077] ...

Embodiment 2

[0082] Taking an OLED display with a maximum gray scale of 512 and a resolution of 1920×1080 as an example, the specific steps for improving the display unevenness are as follows:

[0083] Step 101, selecting pixels. First, the full screen area is divided into 240×135 regions, that is, the size of each region is 8×8, and the pixels in the upper left corner of each region are used as the selected pixels, and a total of 240×135 pixels are selected, which is called These pixels are typical pixels.

[0084] Step 102, record the equivalent working time in real time. The standard brightness taken is the initial brightness of 384 gray levels displayed on the display. For a certain pixel point among the typical pixels, use formula 1 to calculate the equivalent working time of one frame corresponding to the pixel point within the current frame time, and then calculate with the The equivalent working time of pixels is superimposed to obtain a new equivalent working time.

[0085] Ste...

Embodiment 3

[0090] Taking an OLED display with a maximum grayscale of 1024 and a resolution of 7680×4320 as an example, the specific steps for improving the display unevenness are as follows:

[0091] Step 101, selecting pixels. First, the full screen area is divided into 240×180 regions, that is, the size of each region is 32×24, and the pixels in the lower right corner of each region are used as the selected pixels, and a total of 240×180 pixels are selected, which is called These pixels are typical pixels.

[0092] Step 102, record the equivalent working time in real time. The selected standard brightness is the initial brightness of the monitor displaying 1024 gray levels. For a certain pixel point among the typical pixels, use formula 1 to calculate the equivalent working time of one frame corresponding to the pixel point within the current frame time, and then calculate the The equivalent working time of pixels is superimposed to obtain a new equivalent working time.

[0093] Ste...

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Abstract

The invention discloses a method for improving the non-uniform display of an OLED, and belongs to the technical field of OLED image display. The method comprises the steps: dividing the whole screen into a plurality of regions, and selecting one pixel from each region as a typical pixel; recording the equivalent work time of each typical pixel in real time, and calculating the attenuation degrees of all pixels of the whole screen; selecting a typical value from the attenuation degree list of all pixels of the whole screen as the attenuation degree of a display, and determining the compensation attenuation degree according to the attenuation degree of the display; correcting the output gray scale of each pixel according to the input gray scale of each pixel and the attenuation degree of each pixel, thereby achieving the improving of the non-uniform display of the OLED. The method obtains the attenuation degrees through the real-time equivalent work time, timely and effectively improves the non-uniform display of the OLED, has a gray scale correction upper limit in a gray scale correction process, reduces the gray level loss of the pixels while improving the non-uniform display of the OLED, and guarantees the layering sense of the image display.

Description

technical field [0001] The invention belongs to the technical field of OLED image display, and in particular relates to a method for improving the uneven phenomenon of OLED display. Background technique [0002] OLED has the advantages of light and thin, wide color gamut, self-illumination, and flexible display. It is a new technology in the field of flat panel display and is considered to be the most ideal display technology after LCD. [0003] However, there are still some defects in OLED displays that restrict its further development, such as lifespan problems and uneven display, among which uneven display is a key factor restricting the development of OLED to large screens. The phenomenon of uneven display refers to the phenomenon of uneven brightness in the display image of OLED, that is, when an image of the same gray scale is uniformly displayed, there are local areas on the display with different brightness and darkness. In order to improve the market competitivenes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0233
Inventor 张小宁王恒杰孙春来屠震涛张军樊瑞
Owner XI AN JIAOTONG UNIV
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