Apparatus and method for recognizing dust on surface of display panel

Abstract

The invention discloses an apparatus and a method for recognizing dust on a surface of a display panel. The apparatus includes a support. A light spot display bench is arranged on one side of the support. A polarizer and a transparent material board are parallelly arranged above the light spot display bench. Detection sensors are respectively arranged on the edges of the polarizer, the transparent material board and the light spot display bench. A halogen lamp or a light emitting diode and a light barrier mechanical structure are disposed on the top of the support so as to form a halogen lamp zone for regular detection of the dust on the surface of the display panel. A laser zone is formed in the space between the polarizer and the transparent material and the light spot display bench. A laser source is arranged in a corner above the laser zone to form the laser zone for surface dust recognition. The invention also discloses a method of recognizing dust on the surface of the display panel. Compared with the prior art, in the apparatus, there are only two zones requiring visual inspection, so that inspection is carried out within 5 s and efficiency is greatly improved. From the angle of users and energy saving and consumption reduction, thinking and design in depth are done, so that excellent operation and control experience and energy saving effect by more than 50% are achieved.

Description

technical field [0001] The invention belongs to the technical field of display panel detection, and in particular, the invention relates to an identification device and an identification method for dust on the surface of a display panel. Background technique [0002] Existing small and medium-sized display modules include liquid crystal LCD, OLED, etc., and their manufacturing processes are relatively complicated, among which transportation is a basic technical link. However, with the increasingly high requirements for ultra-thin and touch, the existing Technology, more and more exposed the following problems: when the suction cup is used to transport, the debris attached to the suction cup often scratches the surface, and the pressure of the suction cup will also damage the supporting structure of the pixel display area, resulting in poor display. When crawler or roller conveying is used, the surface will often be scratched, causing damage, etc. In addition, these conditio...

AI Technical Summary

Problems solved by technology

[0002] Existing small and medium-sized display modules include liquid crystal LCD, OLED, etc., and their manufacturing processes are relatively complicated, among which transportation is a basic technical link. However, with the increasingly high requirements for ultra-thin and touch, the existing Technology, more and more exposed the following problems: when the suction cup is used to transport, the debris attached to the suction cup often scratches the surface, and the pressure of the suction cup will also damage the supporting structure of the pixel display area, resulting in poor display

The existing technology uses a dust-free cloth dipped in acetone alcohol or IPA to wipe during the detection process to identify whether it is dust or real defects. The general detection speed is 15s to 30s. In order to reduce the operation time, it is also necessary to invest in cleaning equipment, resulting in cost higher

In addition, the above-mentioned detection usually uses human eye detection, and the false positive rate is also high.

There are also foreign machine vision special equipment, but they are not mature in technology, which is manifested as poor versatility of detection, especially low accuracy and efficiency. Human eye inspection still uses machine vision systems such as line array, area array camera, and line array laser 3D, all of which cannot avoid the technical problem of identifying surface dust and real defects

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