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Method for rapidly detecting out-of-control pixel points of display screen

A detection method and display screen technology, applied in the direction of testing optical properties, etc., can solve the problems of reducing production efficiency and achieve the effect of improving work efficiency

Pending Publication Date: 2022-04-22
CHANGCHUN CEDAR ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this sense, it is meaningless to accurately locate the out-of-control pixels point by point. Under this requirement, it is not only unnecessary to accurately locate the out-of-control pixels in a certain row and column of the display unit (module), but also greatly reduces production efficiency.

Method used

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  • Method for rapidly detecting out-of-control pixel points of display screen
  • Method for rapidly detecting out-of-control pixel points of display screen
  • Method for rapidly detecting out-of-control pixel points of display screen

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Effect test

Embodiment 1

[0038] For P1.27 dot pitch LED display products, the module specification is 120×90 dots, the horizontal resolution is 120 dots, and the vertical resolution is 90 dots. Horizontal partition m=24, vertical partition n=18. Such a block image has 24*18=432 partitions. There are 5×5=25 light points in the module area corresponding to each partition. According to the detection method of constant bright spots and blind spots of the present invention, the row and column values ​​of the partitions to which the out-of-control points belong are given, and the position of the out-of-control points can be quickly judged manually in the module area corresponding to the partition (5×5 light spots) and the lamp points can be replaced. .

Embodiment 2

[0040] P1.25 dot pitch LED display product, the module specification is 96×96 light points, the horizontal resolution is 96 light points, and the vertical resolution is 96 light points. Horizontal partition m=16, vertical partition n=16. Such a block image has 16*16=256 partitions. There are 6×6=36 light points in the module area corresponding to each partition. According to the method for detecting constant bright spots and blind spots of the present invention, the row and column values ​​of the subregion to which the out-of-control point belongs are given, and the position of the out-of-control point can be quickly judged manually in the module area (6×6 light spots) corresponding to the subregion and the light point can be replaced. .

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Abstract

The invention relates to a rapid detection method for pixel out-of-control points of a display screen. The method comprises the following steps: acquiring a single-primary-color module image by using an area-array camera and retaining a single-primary-color module area image; segmenting the single-primary-color module area image into a plurality of subareas, calculating the brightness integral values of all image pixel points of each subarea, sorting the brightness integral values from large to small, finding out all subareas with blind spots, of which the brightness integral values are smaller than or equal to cut-off brightness G0, positioning the blind spots, and carrying out lamp point replacement; using an area-array camera to collect a black module image and retaining a black module area image; and segmenting the black module area image into a plurality of subareas, calculating the brightness integral values of all image pixel points of each subarea, sorting the brightness integral values from small to large, finding out all subareas with normally-bright points, of which the brightness integral values are greater than or equal to the cut-off brightness G1, positioning the normally-bright points, and carrying out lamp point replacement. According to the invention, the out-of-control point can be easily found to replace the lamp bead, so that the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for detecting pixel out-of-control points of a display screen, and is particularly suitable for a fast detection method for LED display screen pixel out-of-control points. Background technique [0002] LED light-emitting chips have the advantages of small size, low power consumption, long service life, safe and non-toxic materials, and are currently widely used in lighting and display fields. With the advancement of chip technology, the current LED display application is developing towards the trend of indoor small spacing, and the out-of-control points (including blind spots and constant bright spots) of LED displays are becoming more and more important as one of the LED display detection standards, especially On indoor displays, due to the short viewing distance and high image quality requirements, the requirements for the number of out-of-control points are more stringent. "Light-emitting diode (LED) display screen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 郑喜凤苗静汪洋曹慧丁铁夫
Owner CHANGCHUN CEDAR ELECTRONICS TECH CO LTD
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