基于机器视觉的液晶屏扩散板表面缺陷检测方法  

Surface Defect Detection Method for Television Diffuser Plates Based on Machine Vision

作　　者：张恒瑞 林淼 钟建平 朱合军 Zhang Hengrui

机构地区：[1]研祥智慧物联科技有限公司,广东深圳518107

出　　处：《工业控制计算机》2024年第10期1-3,共3页Industrial Control Computer

摘　　要：扩散板是液晶电视机背光模组中的重要组成部分,用于将LED发出的点光源扩散为均匀的面光源,其质量直接影响到电视机产品的最终成像效果。扩散板的质量检测主要面临诸如尺寸大、精度要求高和检测速度要求快等难题。采用机器视觉方法对电视机扩散板表面缺陷检测进行研究。使用线扫相机及搭建光学成像系统,搭配计算机组成视觉检测系统,探索扩散板表面毛刺、脏污、孔洞、划痕、透光不均等表面缺陷的自动化检测解决方案。设计实验进行数据测试,实验结果准确率96%以上。对加强液晶电视行业扩散板的质量控制,提高电视成像性能具有重要意义。The diffuser plate is a crucial component of the backlight module in LCD televisions.It is responsible for diffusing the point light emitted by LEDs into a uniform surface light source.The quality of the diffuser plate directly impacts the final imaging effect of the television product.The quality inspection of the diffuser plate faces challenges such as large dimensions,high precision requirements,and the need for fast detection speed.This research explores the application of machine vision methods for surface defect detection on diffuser plates for television sets.Build an optical imaging system using a line scan camera,along with compatible light sources and lenses,and combine it with a computer to create a computer vision inspection system.An automated solution for detecting defects like burrs,dirt,holes,scratches,and uneven light transmission on the surface of the diffuser plate is proposed.Experimental design and data testing are conducted,achieving an accuracy rate of over 96%.This research holds significant importance in enhancing the quality control of diffuser plates in the LCD television industry and improving television imaging performance.

关 键 词：液晶电视 扩散板 线扫相机 机器视觉 表面缺陷检测 自动化 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN873.93[自动化与计算机技术—计算机科学与技术]