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TFT-LCD黑Gap分析及改善研究

Research and improvement of TFT-LCD black gap

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摘要

黑Gap是大尺寸TFT-LCD产品常见的一种不良,它直接影响产品品质,降低产品竞争力。本文分析了黑Gap的发生原因及机理,指出面板放在卡夹中受到与卡夹接触点较强外力挤压后发生形变,柱状隔垫物受损,不能及时恢复导致黑Gap的发生。实验表明管控面板在卡夹中的存放时间,限制面板进行加热或降低加热温度,减少加热时间; 增加面板与卡夹接触面积,减小面板与卡夹的接触角; 增加柱状隔垫物与面板接触密度及辅助柱状隔垫物顶面柱径大小均可有效改善黑Gap。通过导入以上措施,使得黑Gap发生率由改善前的8.58%降低至0.1%,大大提高了产品品质。

Abstract

Black Gap is a common defect in the production of large size TFT-LCD(Thin Film Transistor-Liquid Crystal Display). It directly deteriorates the quality of products and reduces the competition of products. The study shows that panel is extruded deformation by long time external force in cassette and the post spacer in cell is damaged and can’t restore in time to result in black gap. To solve this issue, we can control the time of the panel in the cassette, confine oven process or reduce temperature and time properly, increase the contact area and decrease the contact angle between the cassette and panel, increase the contact density between post spacer and panel, and increase sub post spacer top CD respectively. All those actions decrease the black gap ratio from 8.58% to 0.1%, the quality of products has been greatly improved.

Newport宣传-MKS新实验室计划
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中图分类号:TN141.9

DOI:10.3788/yjyxs20183307.0568

所属栏目:材料与器件

收稿日期:2018-02-26

修改稿日期:2018-04-23

网络出版日期:--

作者单位    点击查看

熊 奇:重庆京东方光电科技有限公司, 重庆 400714
毕 芳:重庆京东方光电科技有限公司, 重庆 400714
王耀杰:重庆京东方光电科技有限公司, 重庆 400714
钟 野:重庆京东方光电科技有限公司, 重庆 400714
罗 春:重庆京东方光电科技有限公司, 重庆 400714
张志聪:重庆京东方光电科技有限公司, 重庆 400714
王云志:重庆京东方光电科技有限公司, 重庆 400714

联系人作者:熊奇(xiongqi@boe.com.cn)

备注:熊奇(1987-),男,湖北十堰人,硕士研究生,主要从事液晶显示面板产品良率提升、不良解析及改善等方面研究。

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引用该论文

XIONG Qi,BI Fang,WANG Yao-jie,ZHONG Ye,LUO Chun,ZHANG Zhi-cong,WANG Yun-zhi. Research and improvement of TFT-LCD black gap[J]. Chinese Journal of Liquid Crystals and Displays, 2018, 33(7): 568-574

熊 奇,毕 芳,王耀杰,钟 野,罗 春,张志聪,王云志. TFT-LCD黑Gap分析及改善研究[J]. 液晶与显示, 2018, 33(7): 568-574

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