Application of Photo-Alignment Technique through the Modification of the Polyimide Surface with Chalcone Derivatives to Vertically Aligned LCD

2001 ◽  
Vol 371 (1) ◽  
pp. 443-446 ◽  
Author(s):  
Kyung-Hoon Jung ◽  
Ji-Hae Moon ◽  
Dong-Mee Song ◽  
Dong-Myung Shin
Keyword(s):  
Chalcone Derivatives ◽  
Alignment Technique ◽  
Vertically Aligned ◽  
Photo Alignment

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.

scholarly journals PSV-FLC Fabricated Using Photo-Alignment Technique

2015 ◽  
Vol 612 (1) ◽  
pp. 211-219
Author(s):  
Hirokazu Furue ◽  
Tsubasa Shime ◽  
Yuki Ebato ◽  
Shinichiro Oka ◽  
Shinichi Komura ◽  
...  
Keyword(s):  
Alignment Technique ◽  
Photo Alignment

scholarly journals Photo-Aligned Ferroelectric Liquid Crystal Devices with Novel Electro-Optic Characteristics

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 563
Author(s):  
Vladimir Chigrinov ◽  
Qi Guo ◽  
Aleksey Kudreyko
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Berry Phase ◽  
Photonic Devices ◽  
Ferroelectric Liquid Crystal ◽  
Optical Elements ◽  
Ferroelectric Liquid Crystals ◽  
Liquid Crystal Devices ◽  
Alignment Technique ◽  
Photo Alignment

This paper examines different applications of ferroelectric liquid crystal devices based on photo-alignment. Successful application of the photo-alignment technique is considered to be a critical breakthrough. A variety of display and photonic devices with azo dye aligned ferroelectric liquid crystals is presented: smart glasses, liquid crystal Pancharatnam–Berry phase optical elements, 2D/3D switchable lenses, and laser therapy devices. Comparison of electro-optical behavior of ferroelectric liquid crystals is described considering the performance of devices. This paper facilitates the optimization of device design, and broadens the possible applications in the display and photonic area.

Photo-Alignment Effect in Liquid-Crystal Films Containing Nanoparticles and Azo-Dye

2010 ◽  
Vol 428-429 ◽  
pp. 276-279 ◽  
Author(s):  
Tsung Hsien Lin ◽  
Wen Zheng Chen
Keyword(s):  
Liquid Crystal ◽  
Azo Dye ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Alignment Effect ◽  
Practical Applications ◽  
Liquid Crystal Films ◽  
Crystal Film ◽  
Crystal Films ◽  
Alignment Technique ◽  
Photo Alignment

This work reports the photo-alignment effect in a liquid-crystal film doped with nanoparticles and azo-dye. Vertical alignment induced by the nanoparticles polyhedral oligomeric silsesquioxanes (POSS) can be switched to homogeneous alignment by the absorption of photo-excited azo-dye. Both electro-optical and surface properties are analyzed to verify this effect. Using this photo-alignment technique in nanoparticle- and azo-dye-doped liquid crystal, the phase grating is also demonstrated. The diffraction efficiency is related to the polarization of the probe light and can be controlled by applying voltage. Both nanoparticle- and azo-dye-induced vertical and homogeneous alignments are non-contact aligning methods. Thus, the technique based on dopant-induced alignment has potential for practical applications.

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