液晶与显示2016，Vol.31Issue(11)：1038-1045,8.DOI:10.3788/YJYXS20163111.1038
聚酰亚胺溶液黏度对液晶预倾角的影响
Effect of different polyimide solution viscosity on pretilt angle of liquid crystal
刘金贵 1肖印 1孙迎春1
作者信息
- 1. 重庆京东方光电科技有限公司 Cell PI 科，重庆 400700
- 折叠
摘要
Abstract
To prepare a kind of polyimide (PI)solution with self-alignment function,and avoid produ-cing disadvantage effect (static electricity,particle,alignment error,etc.)on alignment layer with rubbing process,a series of polyimides with different solution viscosity were used to research the rela-tionship between PI solution viscosity and its surface roughness.Meanwhile,the relationship between the surface roughness of PI alignment layer and pretilt angle(θp )of liquid crystal was also studied. The results demonstrated that surface roughness of PI alignment layer increased with PI solution vis-cosity increasing,and also theθp increased with the surface roughness increasing,but when the surface roughness exceeded a certain value of 3.760 nm,θp began to increase slowly.It was mainly be-cause that the high PI solution viscosity hindered the synergic motion of PI chain segment to diffuse to each other,thus forming the rough surface topography.This kind of “peak-valley”topography played a supporting role to the vertical alignment of liquid crystal and then resulted in the highθp .A highθp was generated by high PI solution viscosity to reduce response time,but the micron-grade Inkjet head nozzle would be blocked by high PI solution viscosity.We found that when the viscosity of PI solution was 41CP,its surface roughness of alignment layer was 4.830 nm,and theθp reached to 5.5°,which can satisfy the two requirements mentioned above well.关键词
液晶取向层/聚酰亚胺/表面粗糙度/预倾角Key words
liquid crystal alignment layer/polyimide/surface roughness/pretilt angle引用本文复制引用
刘金贵,肖印,孙迎春..聚酰亚胺溶液黏度对液晶预倾角的影响[J].液晶与显示,2016,31(11):1038-1045,8.
