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Test method for image persistence of display device

A technology of a display device and a test method, applied in static indicators, instruments, etc., can solve the problems of brightness masking, easy to cause misjudgment, and increased difficulty in data analysis.

Active Publication Date: 2018-11-02
TRULY HUIZHOU SMART DISPLAY
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  • Abstract
  • Description
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Problems solved by technology

[0004] Based on this, it is necessary to focus on the fact that when testing the afterimage of the display device, due to the influence of power supply noise, there is a certain fluctuation in the change of brightness, which leads to the fact that the brightness of the test is covered by the noise, the difficulty of data analysis increases, and it is easy to cause misjudgment. Technical problem, provide a test method for afterimage of display device

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  • Test method for image persistence of display device
  • Test method for image persistence of display device
  • Test method for image persistence of display device

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may ...

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Abstract

The invention discloses a test method for image persistence of a display device. The test method comprises the steps of: controlling a first test region to display a first image and controlling a second test region to display a second image during a time period t1-t2, and controlling the first test region and the second test region to display the first image during a time period t2-t3; acquiring avariation L1(t) of luminance L1 of the first test region varying with time during a time period t1-t3, and acquiring a variation Y2 (t) of a test parameter Y2 of the second test region varying with time during the time period t1-t3; and calculating a value of a variation C(t) of an image persistence parameter C varying with time after noise removal during the time period t1-t3 according to C(t)=Y2(t)-K*L1(t). Since the noise is just removed by the difference between the Y2(t) and KL1(t), and the value of C(t) is the value after the noise is removed, the test result of the image persistence isnot affected by the noise.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a test method for image sticking of a display device. Background technique [0002] In order to improve the performance and quality of the display device, during the production process, it is necessary to detect and evaluate performance indicators such as resolution, brightness, contrast, color gamut, response time, and afterimage level of the display device. Here, the afterimage refers to image retention. Specifically, when the display device drives a specific still picture for a long time, the thin film transistors therein are affected by bias stress or the brightness of the light-emitting diodes therein is attenuated, causing the luminous brightness of the display device to change, thus causing the display panel to display images When there is a difference, for example, when the display screen is switched to the next screen, the image of the previous screen will remain on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCG09G3/006
Inventor 阮伟文张家朝吴锦坤胡君文谢志生苏君海李建华
Owner TRULY HUIZHOU SMART DISPLAY
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