TFT-LCD残影不良的研究与改善

范恒亮; 汤展峰; 刘利萍; 李静; 黄静; 刘岩龙

doi:doi:10.3788/yjyxs20163103.0270

液晶与显示, 2016, 31 (3): 270, 网络出版: 2016-04-12

TFT-LCD残影不良的研究与改善

Research and improvement of TFT-LCD image-retention

论文大纲

范恒亮 ^*汤展峰刘利萍李静黄静刘岩龙

作者单位

合肥鑫晟光电科技有限公司，安徽合肥 230012

残影扭曲向列型配向弱区内部电场 image-retention twisted nematic alignment weak area internal electric field

摘要

影像残留是TFT-LCD，特别是TN型产品常见的不良，对产品良率影响很大。本文从产品设计、工艺参数、工艺管控3个方面对残影进行分析。发现产品设计时Data线两侧段差过大，是导致残影发生的主要原因，通过增加配向膜厚度和摩擦强度值可以有效降低残影，实验得出配向膜膜厚高于110 nm，摩擦强度高于5.5 N·m时无残影发生。通过控制配向膜工程与摩擦工程间的延迟时间在5 h，摩擦工程与对盒工程间的延迟时间在10 h，并且严格管控ITO偏移量可以有效减少Panel内部电场，从而降低残影。通过以上措施，对于15.6HD产品，良率提升了10%，为企业高效生产奠定基础。

Abstract

Image-retention has always been a problem in the TFT-LCD production process, especially for the TN production, and already had a great influence on the production yield of the products. This article mainly discussed the three aspects which had the influence on the incidence of image-retention including product designs, process parameters and the process control. The results showed that the main reason of image-retention is the oversize of segment difference at both sides of the Data line during product designs. And it was found that image-retention could be reduced by increasing the alignment film thickness and the rubbing torque value. No image-retention occurs when the alignment film thickness and the rubbing torque value are higher than 110 nm and 5.5 N·m, respectively. It can lower the image-retention by controlling the ITO overlay and controlling the PI-Rub delay time in 5 h, Rub-Assy delay time in 10 h to reducing the internal electric field of panel. As for 15.6HD products, the yield increased by 10% through the above measures which might lay the foundation of high-efficient production for enterprises.

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范恒亮, 汤展峰, 刘利萍, 李静, 黄静, 刘岩龙. TFT-LCD残影不良的研究与改善[J]. 液晶与显示, 2016, 31(3): 270. FANG Heng-liang, TANG Zhang-feng, LIU Li-ping, LI Jing, HUANG Jing, LIU Yang-long. Research and improvement of TFT-LCD image-retention[J]. Chinese Journal of Liquid Crystals and Displays, 2016, 31(3): 270.

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