A gamma correction method for oled screen

Abstract

The invention discloses a gamma correction method for an OLED displayer. The gamma correction method for the OLED displayer comprises the steps that sampling and median filtering are conducted on all pixels of an OLED screen multiple times through an image acquisition system, so that the brightness information of each pixel is obtained; nonlinear compensation is conducted on the image information acquired through the image acquisition system, and the corresponding relation between the photosensitive pixels of the image acquisition system and the pixels of the OLED display screen is established; statistic, analysis and quadratic function fitting are conducted on the brightness information, acquired through the image acquisition system, of all the pixels, so that the light-emitting characteristic curve and the correction coefficient matrix of each pixel are obtained; the characteristic parameters of each sub-pixel are obtained through calculation according to the light-emitting characteristic curves of the pixels; pre-emphasis processing is conducted according to the correction coefficient matrixes and video input, and brightness uniformity correction is achieved for consistency correction of the display screen. According to the gamma correction method for the OLED displayer, the light-emitting characteristic curve of each pixel can be extracted automatically for analysis, a series of calculation is conducted by means of the correction coefficient matrixes and video input data, and thus consistency correction of the display screen is achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a calibration method for an OLED display. Background technique [0002] Organic light-emitting diode (OLED) is a new type of active light-emitting display device, which can be used to make ultra-light, ultra-thin, low-power consumption, high-brightness, high-contrast, high-resolution displays with excellent display performance. As a brand-new display device, it is necessary to measure and evaluate the brightness and uniformity of the product or sample, whether in actual production or in the research and development process. The preparation and testing of a large number of samples is a labor-intensive task. The methods, means, environment and other factors used in the test will have varying degrees of influence on the measurement results, and the results will directly affect the research and development, performance improvement and other aspects of work. Progress. Therefore, te...

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Problems solved by technology

[0004] Aiming at the problems of color drift and brightness unevenness in the OLED display module due to the current OLED production process and the current OLED, this patent proposes a brightness uniformity correction system and method for OLED displays

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