Research and application of detecting accurate defect coordinates for large size LCD panel

ZHANG Jun; ZHU Zhong-fa; ZHOU Jin; LIU Cheng; SUO Jin-liang; WANG Bin; HUANG Zhu-bing

doi:10.37188/CJLCD.2022-0259

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Research and application of detecting accurate defect coordinates for large size LCD panel

Device Physics and Device Preparation | 更新时间：2022-11-22

- Research and application of detecting accurate defect coordinates for large size LCD panel
- Chinese Journal of Liquid Crystals and Displays Vol. 37, Issue 12, Pages: 1561-1571(2022)
- 作者机构：
  
  1.合肥京东方显示技术有限公司，安徽合肥 230012
- 作者简介：
- 基金信息：
- DOI：10.37188/CJLCD.2022-0259
  CLC：
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ZHANG Jun, ZHU Zhong-fa, ZHOU Jin, et al. Research and application of detecting accurate defect coordinates for large size LCD panel. [J]. Chinese Journal of Liquid Crystals and Displays 37(12):1561-1571(2022)
DOI：

ZHANG Jun, ZHU Zhong-fa, ZHOU Jin, et al. Research and application of detecting accurate defect coordinates for large size LCD panel. [J]. Chinese Journal of Liquid Crystals and Displays 37(12):1561-1571(2022) DOI： 10.37188/CJLCD.2022-0259.

摘要

为了解决传统小尺寸液晶面板缺陷寻址方法应用在高分辨率、大尺寸液晶面板上存在的效率低、精度差等问题，建立了全自动缺陷精确寻址系统，并对该系统硬件与软件的架构及实施方式、缺陷的定址逻辑进行研究。首先，在点灯检测设备的基础上增加可移动光学相机机构和相应的软件架构，构建成寻址中控系统；然后，通过相机拍摄液晶面板自身显示的空心十字光标与缺陷重合前后的图片，采用对比的方法精确定位缺陷；最后，通过液晶面板驱动装置输出缺陷坐标。对5种缺陷进行测试，结果表明，该系统稳定易用，具有全自动、识别速度快和100%精确寻址等优点。该系统应用于H公司缺陷坐标寻址工序后，缺陷坐标准确性提升30%以上，缺陷维修收益显著提升，在大尺寸液晶面板缺陷维修坐标寻址领域具有重大应用价值。

Abstract

In order to solve the problems of low efficiency and poor accuracy of traditional small size LCD panel defect addressing method applied to high resolution and large size LCD panel， a full automatic accurate defect addressing system was established， and its hardware and software architecture， implementation and defect addressing logic were studied. Firstly， an addressing central control system was constructed by adding a movable optical camera mechanism and corresponding software architecture on the basis of detection equipment. Then， the system can accurately detect the defect by comparing the pictures taken by camera before and after the hollow cross cursor displayed by the LCD panel coincided with defect. Finally， the defect coordinates were output through the LCD panel driving device. After five types of defects test， the results show that the system is stable and easy to use， as well as fully automatic， faster recognition and 100% accurate addressing. After the application of the system in the defect coordinates addressing process of H company， the accuracy of defect coordinates increases by more than 30%， which brings significant improvement in repair benefits. The system has great application value in the field of defect coordinates addressing of large size LCD panel.

关键词

大尺寸液晶面板缺陷坐标精确定位

Keywords

large sizeLCD paneldefect coordinatesaccurate addressing

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