TFT-LCD改善“斑点不良”的研究

发布时间：2018-01-04 11:33

  本文关键词：TFT-LCD改善“斑点不良”的研究　出处：《液晶与显示》2017年07期 　论文类型：期刊论文

  更多相关文章： 液晶显示面板 斑点不良 黑矩阵 隔垫物

【摘要】：在压力测试时,高分辨率TFT-LCD(Thin Film Transistor-Liquid Crystal Display)液晶面板会发生“斑点不良”。为了预防该不良的发生,本文分析了“斑点不良”的发生机理:压力测试时,隔垫物PS(Photo Spacer)发生滑动,将阵列基板上透光区域的配向膜-聚酰亚胺PI(Polyimide)划伤,而失去配向液晶能力,在暗态画面下,划痕处会发生漏光,形成斑点状。本文对不同尺寸及分辨率的液晶面板进行了压力测试,比较隔垫物挡墙、黑矩阵BM(Black Martrix)、隔垫物站位等不同因素对“斑点不良”的影响:隔垫物挡墙能有效阻挡隔垫物的滑动距离的23.6%,能有效降低“斑点不良”的漏光发生;当隔垫物滑动的距离未超出黑矩阵的遮挡范围时,不可见“斑点不良”或很轻微;站在金属块(Pillow)上的隔垫物比没有站在Pillow上的隔垫物滑动距离小约10%。最后以49in超高清UHD(Ultra High Definition)液晶面板为例,提出一种改善“斑点不良”的的设计方案:增加PS上下挡墙设计,降低PS滑动距离;增加BM宽度设计,保证PS边缘到BM边缘的距离大于PS滑动距离;降低PS的个数,增加PS的大小设计降低透过率损失。该方案客户验证无“斑点不良”发生且透过率下降1.2%,说明此设计方案能够有效地改善“斑点不良”。
[Abstract]:During a stress test. High resolution TFT-LCD(Thin Film Transistor-Liquid Crystal display. The LCD panel will have "speckles". To prevent the occurrence of this bad. In this paper, the occurrence mechanism of "speckle disorder" is analyzed: when the pressure is measured, the spacer PS(Photo Spacer slips. The poly-imide polyimide film was scratched on the transparent region of the array substrate, and lost the ability of alignment liquid crystal. In the dark picture, there would be light leakage in the scratches. In this paper, the pressure of liquid crystal panels with different sizes and resolutions was measured to compare the barrier wall, black matrix BM(Black martrix. The influence of different factors such as the position of spacer on "spot bad": the barrier wall can effectively block the sliding distance of the spacer and reduce the leakage of "spot bad" effectively; When the sliding distance of the spacer does not exceed the cover range of the black matrix, "speckle is not seen" or very slight; The sliding distance of the spacer on the metal block Pillow is about 10 times smaller than that on the Pillow. Finally, the ultra high definition UHD (UHD) is used for 49 min. Ultra High definition) liquid crystal panel as an example. This paper puts forward a design scheme to improve "speckle bad": increasing the design of PS upper and lower retaining wall and reducing the sliding distance of PS; When the width of BM is increased, the distance from PS edge to BM edge is larger than that of PS sliding distance. Reduce the number of PS, increase the size of PS design to reduce the loss of transmittance. It shows that this design scheme can effectively improve the "spot bad".
【作者单位】： 重庆京东方光电科技有限公司;
【分类号】：TN873.93
【正文快照】： (Chongqing Boe Optoelectronics Technology Co.,Ltd,Chongqing400700,China)TFT-LCD(Thin Film Transistor-LiquidCrystal Display)液晶面板目前主要的发展趋势是高分辨率[1]和高透过率[2]。随着TFT-LCD液晶面板的分辨率不断提高,每英寸象素数量相应增多,单个像素的尺寸就相，

本文编号：1378329