Improvement of peripheral PI Mura

Chang-jian XU; Shun-sha LU; Guo-jing MA; Dan WANG; Jin-yu REN; Bo ZHOU; Yong-zhi SONG; Wei-tao CHEN; Sha FENG

doi:10.3788/YJYXS20183310.0831

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Improvement of peripheral PI Mura

Material and Device | 更新时间：2020-07-06

- Improvement of peripheral PI Mura
- Chinese Journal of Liquid Crystals and Displays Vol. 33, Issue 10, Pages: 831-835(2018)
- 作者机构：
  
  北京京东方显示技术有限公司, 北京 100176
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20183310.0831
  CLC： TN141.9
- Received：13 May 2018，
  
  Accepted：04 August 2018，
  
  Published：05 October 2018
- 稿件说明：
移动端阅览
Chang-jian XU, Shun-sha LU, Guo-jing MA, et al. Improvement of peripheral PI Mura[J]. Chinese journal of liquid crystals and displays, 2018, 33(10): 831-835.
DOI：

Chang-jian XU, Shun-sha LU, Guo-jing MA, et al. Improvement of peripheral PI Mura[J]. Chinese journal of liquid crystals and displays, 2018, 33(10): 831-835. DOI： 10.3788/YJYXS20183310.0831.

摘要

在大世代线液晶面板厂，因产品切换便捷、产能高等优势，配向膜材料涂布多采用喷墨印刷方式。但随着高分辨率、无边框等技术升级，喷墨印刷方式面临的挑战也随之增加，产生了很多新的配向膜不良。本文研究了一种周边配向膜Mura，分析原因为阵列基板上的配向膜固化时，在基板周边过孔处出现堆积，造成周边显示区配向膜厚不均匀，导致显示区边缘形成暗线不良。文章从配向膜边界位置、预固化温度、预固化环境气压和配向膜膜厚4个方面进行分析实验，证明了外扩配向膜边界、降低预固化温度、降低预固化环境气压和降低配向膜膜厚，可以有效减轻配向膜在周边过孔处堆积，进而成功解决此不良，获得优异的显示品质。

Abstract

In large generation LCD factory

Inkjet printing is widely used for PI (Polyimide alignment film) material coating

due to convenient product switching and high capacity. As the technology upgrading

such as high PPI

Borderless

etc.

the challenges of novel PI Mura occurred in inkjet printing process. We research a kind of peripheral PI Mura in this paper. In Pre-cure process

PI solution was accumulated much near the peripheral

via

Hole of array glass

leading to larger inhomogeneous film thickness

which caused the edge dark line mura. We research the process conditions of PI pattern position

Pre-cure temperature

Pre-cure air pressure and PI Thickness. The results reveal that extending edge of PI pattern

lowering Pre-cure temperature

reducing the air pressure and thinning the film effectively decrease accumulation near the peripheral via hole

and induce the defect-free and excellent display

关键词

Keywords

references

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