scholarly journals Flexible Bistable Smectic-A Liquid Crystal Device Using Photolithography and Photoinduced Phase Separation

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Yang Lu ◽  
Jinbao Guo ◽  
Hao Wang ◽  
Jie Wei
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Contrast Ratio ◽  
Polymer Layer ◽  
Mechanical Pressure ◽  
Flexible Display ◽  
Liquid Crystal Device ◽  
Smectic A ◽  
Polymer Wall ◽  
Excellent Stability

A flexible bistable smectic-A liquid crystal (SmA LC) device using pixel-isolated mode was demonstrated, in which SmA LC molecules were isolated in pixels by vertical polymer wall and horizontal polymer layer. The above microstructure was achieved by using ultraviolet (UV) photolithography and photoinduced phase separation. The polymer wall was fabricated by photolithography, and then the SmA LC was encapsulated in pixels between polymer wall through UV-induced phase separation, in which the polymer wall acts as supporting structure from mechanical pressure and maintains the cell gap from bending, and the polymer layer acts as adhesive for tight attachment of two substrates. The results demonstrated that all the intrinsic bistable properties of the SmA LC are preserved, and good electrooptical characteristics such as high contrast ratio and excellent stability of the bistable states were characterized. This kind of SmA bistable flexible display has high potential to be used as electronic paper, smart switchable reflective windows, and so forth.

P-88: Enhancement of Electro-Optic Properties of Optically Isotropic Liquid Crystal Device for Flexible Display

2015 ◽  
Vol 46 (1) ◽  
pp. 1483-1486 ◽  
Author(s):  
Eun Jeong Shin ◽  
Seong Cheol Noh ◽  
Tae Hyung Kim ◽  
Jee Hun Kim ◽  
Prasenjit Nayek ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Flexible Display ◽  
Isotropic Liquid ◽  
Liquid Crystal Device ◽  
Electro Optic

Polymer Wall Formation Using Liquid-Crystal/Polymer Phase Separation Induced on Patterned Polyimide Films

2004 ◽  
Vol 43 (No. 12B) ◽  
pp. L1578-L1580 ◽  
Author(s):  
Takeshi Murashige ◽  
Hideo Fujikake ◽  
Hiroto Sato ◽  
Hiroshi Kikuchi ◽  
Taiichiro Kurita ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Liquid Crystal Polymer ◽  
Polymer Phase ◽  
Polyimide Films ◽  
Wall Formation ◽  
Crystal Polymer ◽  
Polymer Wall

scholarly journals Large Scale Liquid Crystal Device with Graphene-based Electrodes

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Stefan Petrov ◽  
Vera Marinova ◽  
Shiuan Huei Lin ◽  
Chia Ming Chang ◽  
Yi Hsin Lin ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Large Scale ◽  
Contrast Ratio ◽  
Optical Transmittance ◽  
Device Fabrication ◽  
Electrical Measurements ◽  
Liquid Crystal Device ◽  
Glass Substrates ◽  
Alignment Technique ◽  
Photo Alignment

AbstractThe new generation Liquid-Crystal Displays (LCDs) will play a key role in modern display industry thus the requirements concerning the response time, power consumption, viewing angles, contrast ratio and easy production stay beyond challenging. In this paper we demonstrate fabrication of large scale liquid crystal device with graphene-based electrodes using a photo-alignment technique. The quality of graphene layer, grown by low pressure CVD method and transferred on the glass substrates was characterized by several techniques: Raman spectroscopy, optical transmittance and electrical measurements. A photo-alignment method instead of commonly used mechanical rubbing technique was used to protect the graphene surface and prevent its partial deattachment from the glass substrates by coating a polyimide layer on the top of graphene. Measured modulation characteristics reveal that the photo-alignment technique possesses great potential for next generation graphene - based LC device fabrication.

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