scholarly journals Single glass substrate liquid crystal device using electric field-enforced phase separation and photoinduced polymerization

2007 ◽  
Vol 90 (19) ◽  
pp. 191105 ◽  
Author(s):  
Hongwen Ren ◽  
Shin-Tson Wu ◽  
Yi-Hsin Lin
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Electric Field ◽  
Glass Substrate ◽  
Liquid Crystal Device ◽  
Photoinduced Polymerization

Nano-Sized Fine Droplets of Liquid Crystals for Optical Application

1996 ◽  
Vol 457 ◽  
Author(s):  
Shiro Matsumoto ◽  
Marthe Houlbert ◽  
Takayoshi Hayashi ◽  
Ken-ichi Kubodera
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Liquid Crystals ◽  
Electric Field ◽  
Applied Voltage ◽  
Applied Electric Field ◽  
Uv Curing ◽  
Infrared Region ◽  
High Transparency ◽  
Power Change

ABSTRACTNano-sized fine droplets of liquid crystal (LC) were obtained by phase separation of nematic LC in UV curing polymer. The polymer composite had a high transparency in the infrared region. The fine droplets responded to an electric field causing a change in birefringence. Output power change was brought about by the generated retardation between two polarizations, parallel and perpendicular to the applied electric field. This differs from the composite containing much larger droplets, where output depends on the degree of scattering. The birefringence changed by 0.001 at the applied voltage of 7.5 V/μm.

Phase Separation in Polymer Dispersed Liquid Crystal Device

2010 ◽  
Vol 663-665 ◽  
pp. 763-766 ◽  
Author(s):  
Qing Lan Ma ◽  
Yuan Ming Huang
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Optical Microscope ◽  
Liquid Crystal Device ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Polymerization Induced Phase Separation

Polymer dispersed liquid crystal device was prepared by the method of polymerization induced phase separation. The phase separation in our PDLC device was characterized by a polarized optical microscope. Our results demonstrated that the phase-separated droplets in our PDLC device presented the four-brush radial, bipolar and axial configurations. Furthermore, these configurations were simulated by mathematica tool

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.

Effect of electric field on phase separation of polymer dispersed liquid crystal

2003 ◽  
Vol 39 (8) ◽  
pp. 1635-1640 ◽  
Author(s):  
Wenjie Zhang ◽  
Jiaping Lin ◽  
Tianshi Yu ◽  
Shaoliang Lin ◽  
Dianzhi Yang
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Electric Field ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed
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