Automatic LCD screen detecting cabinet based on machine vision

Abstract

The invention discloses an automatic LCD screen detecting cabinet based on machine vision. The automatic LCD screen detecting cabinet based on machine vision comprises a cabinet base, a darkroom, a multi-station rotating plate system, an automatic machine vision adjusting system and an automatic PG screen pointing system. The automatic PG screen pointing system comprises a graph signal generator, a pneumoelectric sliding ring, a power source, a computer and a plurality of signal rotating plates corresponding to LCD screen jigs in number. The automatic machine vision adjusting system comprises an industrial camera, a camera installation assembly, a perpendicular movement mechanical arm and a mechanical arm support. A light source support is further arranged on the top of the cabinet base, and a light source is arranged on the light source support and located between the industrial camera and the LCD screen jigs. The signal output end of the industrial camera is connected into the computer, and the control end of the perpendicular movement mechanical arm and the control end of the motor are connected into the computer. The automatic LCD screen detecting cabinet can eliminate the influences of external natural light and dust and impurities in the air on LCD screen defect detection, and meanwhile, the detecting cabinet has high integration degree, and the detecting efficiency of an LCD screen is greatly improved.

Description

technical field [0001] The invention relates to the technical field of automatic optical detection, in particular to a machine vision-based automatic detection machine for LCD screens. Background technique [0002] At present, TFT LCD panel is the mainstream device in display equipment, and it is widely used in people's daily life. It is currently the only comprehensive performance such as brightness, contrast, power consumption, life, physical examination and weight that can catch up with and surpass CRT. Display devices, with the heating up of the liquid crystal display market, people are paying more and more attention to the liquid crystal display industry. In order to replace the traditional manual detection method, researchers began to introduce CCD (industrial camera) detection technology and design AOI (Automatic Optic Inspection) The system replaces human eye detection, but due to the interference of external natural light and dust impurities in the air on CCD detect...

AI Technical Summary

Problems solved by technology

[0002] At present, TFT LCD panel is the mainstream device in display equipment, and it is widely used in people's daily life. It is currently the only comprehensive performance such as brightness, contrast, power consumption, life, physical examination and weight that can catch up with and surpass CRT. Display devices, with the heating up of the liquid crystal display market, people are paying more and more attention to the liquid crystal display industry. In order to replace the traditional manual detection method, researchers began to introduce CCD (industrial camera) detection technology and design AOI (Automatic Optic Inspection) The system replaces human eye detection, but due to the interference of external natural light and dust impurities in the air on CCD detection and the interference of communication connections, the false detection rate and missed detection rate of detection equipment on the market are high, and the over-detection is serious, making it difficult to replace Human eye detection, at the same time, the integration level is not enough, and the detection efficiency is low (it is only a single experimental research equipment, which cannot be combined with the production line for pipeline detection)

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