Detection method of broken bright spots in liquid crystal display

Abstract

The present application provides a method for detecting broken bright spots in a liquid crystal display screen, using the foreign matter points in the dust image to remove the foreign matter points corresponding to the dust in the black image, and obtaining a preliminary target image; using multiple structural elements of different angles, Process the preliminary target image to obtain all the foreign matter points in the preliminary target image; from all the foreign matter points in the preliminary target image, select a set of foreign matter points whose arrangement direction is the same as the angular direction of the structural element as the initial target foreign matter; Use the Blob analysis method to remove the collection of foreign matter points that do not meet the preset area and length standards in the initial target foreign matter to obtain the target foreign matter; judge whether the density of foreign matter points in the target foreign matter meets the preset density standard; Foreign matter points are judged as broken bright spots. In the present application, a plurality of preset standards are used to remove a set of foreign matter points that do not meet the preset standards, remove interference points in the image, and improve detection accuracy.

Description

technical field [0001] The present application relates to the field of defect detection, in particular to a method for detecting broken bright spots in liquid crystal display screens. Background technique [0002] LCD (Liquid Crystal Display, liquid crystal display) has been widely used in many fields such as mobile phones, tablet computers, and vehicle displays. With the increase of market demand and intensified competition, the quality requirements of customers for LCD are constantly improving, which prompts LCD manufacturers to pay more attention to the quality inspection of LCD. Among them, foreign object detection is the key quality inspection item of LCD. [0003] Among them, the difficulty of foreign object detection lies in the low contrast between the foreign object and the background, and the shape of the foreign object is not uniform, so it is not easy to be found, especially the foreign object in the Cell segment. However, the assembly process of the mobile pho...

AI Technical Summary

Problems solved by technology

[0006] This application provides a detection method for broken bright spots in a liquid crystal display to solve the technical problem of low accuracy of existing detection methods

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