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Method and device for rating afterimage

A technology of grade evaluation and afterimage, which is applied in the method of comparing with reference electrical parameters, testing optical performance, etc., can solve problems such as error in judgment results, and achieve the effect of improving accuracy

Inactive Publication Date: 2010-02-24
BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From the above description, it can be seen that the method for assessing the level of afterimages in the prior art is completely through visual inspection by human eyes, because the vision of different people may be different, causing different judgment individuals to obtain different judgment results, making the judgment results exist. error

Method used

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  • Method and device for rating afterimage
  • Method and device for rating afterimage
  • Method and device for rating afterimage

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Experimental program
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Embodiment 1

[0043] This embodiment provides a method for assessing the afterimage level, such as image 3 As shown, the method includes the following steps:

[0044] 301. Before performing the afterimage experiment on the display, display a reference pattern on the display. The reference pattern can be a full-screen gray pattern with a color value of (127, 127, 127). The specific pattern is as follows Figure 4 shown.

[0045] 302. Obtain the initial brightness of the reference pattern displayed on the display. In this embodiment, the camera can be fixed at a shooting angle and shooting distance, and then take a picture of the reference pattern displayed on the display, and use the color value obtained during the shooting Calculate the initial brightness.

[0046] 303. Carry out an afterimage experiment on the display, that is, control the display to display a static pattern for a long time. The static pattern is generally a black and white pattern, such as Figure 5 As shown, the spec...

Embodiment 2

[0074] This embodiment provides a method for assessing the afterimage level, such as Figure 8 As shown, the method includes the following steps:

[0075] 801. Before performing an afterimage experiment on the display, display a reference pattern on the display. The reference pattern may be a full-screen gray pattern with a color value of (127, 127, 127).

[0076] 802. Acquire the initial brightness displayed on the display by the reference pattern. In this embodiment, the initial brightness of the measurement point is directly measured by a brightness meter.

[0077] 803. Perform an afterimage experiment on the display, that is, control the display to display a static pattern for a long time, and the static pattern is generally a black and white pattern, such as a chessboard pattern.

[0078] In order to ensure that the follow-up evaluation can be carried out smoothly, the afterimage experiment carried out in this embodiment needs to cause afterimages to appear on the displa...

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Abstract

The invention discloses a method and a device for rating an afterimage, relates to the technical field of display, and aims to solve the problem of the prior art that the afterimage is accurately rated by human eyes. The method comprises the following: obtaining initial brightness and target brightness of reference images displayed on a displayer before and after an afterimage test; working out adifference between the target brightness and the initial brightness; and accurately rating the afterimage on the displayer according to the difference.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method and a device for evaluating the level of afterimages generated in a display. Background technique [0002] When a flat panel monitor stops at one image for an extended period of time and then displays another image, it can leave an afterimage of the original image. Among them, the liquid crystal display is due to the fact that after displaying a still picture for a long time, there will be residual charges distributed in the liquid crystal display under the action of an external electric field. These residual charges will affect the orientation of the liquid crystal at the top and bottom of the liquid crystal cell. When the liquid crystal display displays other images At this time, the liquid crystal molecules cannot be completely deflected in time to adapt to the new picture, so that the original picture is still displayed on the liquid crystal display, thereby affecti...

Claims

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Application Information

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IPC IPC(8): G01M11/02G01J1/10
Inventor 张培林
Owner BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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