Method for testing screen ghosting

Abstract

The invention relates to the technical field of screen display, in particular to a method for testing screen ghosting, which comprises the following steps of: S1, setting all gray values of pixel points on a screen to be 128; S2, testing for the first time and recording the overall brightness value LVAP of the screen; S3, setting all gray values of pixel points on the screen to be N; S4, switching the gray values of the pixel points on the screen from all setting to N to all setting to 128; S5, carrying out mura detection on the screen in the darkroom; S6, testing for the second time and recording the overall brightness value LVBP of the screen; S7, calculating a brightness difference value ratio ABS (LVAP-LVBP) / LVAP; S8, comparing the brightness difference value ratio with 2%, and determining that the screen has no ghost shadow when the brightness difference value ratio is less than or equal to 2%; and when the brightness difference ratio is greater than 2%, determining that the screen has ghosting.

Description

【Technical field】 [0001] The invention relates to the technical field of screen display, in particular to a method for testing screen afterimages. 【Background technique】 [0002] When the display screen stays on a screen for a long time, the charged particles in the liquid crystal in the display screen will be adsorbed on both ends of the upper and lower glass to form a built-in electric field. After the screen is switched, these charged particles will be released immediately, so that the liquid crystal molecules will not Immediately turning to the corresponding angle will cause image sticking. In addition, due to poor design of the pixel electrode in the design stage, the liquid crystal molecules will also be disorderly arranged when switching screens, resulting in image sticking. [0003] The afterimage phenomenon will affect the user's perception of the screen. When the user watches a screen on the screen, the image of the screen does not disappear in time, resulting in o...

AI Technical Summary

Problems solved by technology

[0002] When the display screen stays on a screen for a long time, the charged particles in the liquid crystal in the display screen will be adsorbed on both ends of the upper and lower glass to form a built-in electric field. After the screen is switched, these charged particles will be released immediately, so that the liquid crystal molecules will not Immediately turning to the corresponding angle will cause residual image phenomenon. In addition, due to the poor design of the pixel electrode in the design stage, the liquid crystal molecules will also be disorderly arranged when the screen is switched, resulting in residual image phenomenon.

[0003] The afterimage phenomenon will affect the user's perception of the screen. When the user watches a screen on the screen, the image of the screen does not disappear in time, resulting in overlapping with the next screen, which greatly reduces the user's sense of experience.

Existing test methods rely on the subjective judgment of testers, and there are limitations in the division of screen blocks

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