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Chromatic display unit white field homogeneity testing method and system

A technology for color display devices and testing methods, applied in electrical components, televisions, image communications, etc., can solve the problems of inability to form a unified, inability to evaluate the screen performance as a whole, and achieve the effect of avoiding test errors and ensuring consistency

Inactive Publication Date: 2006-06-21
SHANGHAI NOVEL COLOR PICTURE TUBE
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Problems solved by technology

Among them, the single-probe colorimeter point-by-point test method can only test one point at a time, so it is impossible to make an overall evaluation of the performance of the entire screen, and the manual judgment method is used, because everyone's naked eye judgment has errors, so it is impossible. form a unified standard

Method used

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  • Chromatic display unit white field homogeneity testing method and system
  • Chromatic display unit white field homogeneity testing method and system
  • Chromatic display unit white field homogeneity testing method and system

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] figure 1 It is a flow chart of the white field uniformity testing method of the color display device of the present invention. refer to figure 1 , the color display device white field uniformity test method of the present invention comprises the steps:

[0029] S11. Image acquisition step, image the color image on the photodetector, collect the image through the graphics acquisition card, and obtain the R, G, and B values ​​of the full-screen white field image of the color display device. Generally speaking, using a photodetector (CCD) to completely capture the image of the display screen will continuously capture at least 5 frames of images. The collected images are in the form of figure 2 As shown, this figure is an example of the graphics of the color picture tube under the white field signal.

[0030] S12. Fil...

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Abstract

The invention discloses a homogeneity test method for homogeneity of color display, which comprises: collecting image with image collector, filtering with mean value average filter device, partitioning image with image partition device, calculating lightness and colority and homogeneity of white field by opposite device. This invention decides the homogeneity of white field for whole screen with uniform standard instead of manual decision to avoid test error and ensure consistency.

Description

technical field [0001] The invention relates to the detection field of color display devices, in particular to a method and system for testing white field uniformity of color display devices. Background technique [0002] The white field uniformity of a color display is an important parameter to evaluate the quality of a color display device. It includes the evaluation of color and brightness uniformity. At present, most of them use a single-probe colorimeter point-by-point test method, or an experienced tester with the naked eye. judge. Both of these judgment methods have flaws. Among them, the single-probe colorimeter point-by-point test method can only test one point at a time, so it is impossible to make an overall evaluation of the performance of the entire screen, and the manual judgment method is used, because everyone's naked eye judgment has errors, so it is impossible. form a unified standard. [0003] Therefore, there is a need for a method and system that can ...

Claims

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Application Information

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IPC IPC(8): H04N17/02
Inventor 王勇李志能
Owner SHANGHAI NOVEL COLOR PICTURE TUBE
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