51.4: Broadband Quarter Wave Plate Using a Twisted Nematic Liquid Crystal Film and Two Uniaxial Films

2007 ◽  
Vol 38 (1) ◽  
pp. 1567-1570 ◽  
Author(s):  
Yuhua Huang ◽  
Thomas X. Wu ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Quarter Wave Plate ◽  
Wave Plate ◽  
Crystal Film ◽  
Twisted Nematic ◽  
Quarter Wave ◽  
Twisted Nematic Liquid Crystal

scholarly journals Bistable light-driven π phase switching using a twisted nematic liquid crystal film

2014 ◽  
Vol 22 (10) ◽  
pp. 12133 ◽  
Author(s):  
Chun-Wei Chen ◽  
Cheng-Chang Li ◽  
Hung-Chang Jau ◽  
Chun-Hong Lee ◽  
Chun-Ta Wang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Phase Switching ◽  
Crystal Film ◽  
Twisted Nematic ◽  
Twisted Nematic Liquid Crystal

Study of optical rotation generated by the twisted nematic liquid crystal film: based on circular birefringence effect

2019 ◽  
Vol 58 (19) ◽  
pp. 5301
Author(s):  
Xiangshen Meng ◽  
Xiaoyan Qiu ◽  
Guoqing Li ◽  
Wenjiang Ye ◽  
Yueqiang Lin ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Optical Rotation ◽  
Crystal Film ◽  
Twisted Nematic ◽  
Twisted Nematic Liquid Crystal ◽  
Birefringence Effect

scholarly journals High-Contrast and Scattering-Type Transflective Liquid Crystal Displays Based on Polymer-Network Liquid Crystals

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 739 ◽  
Author(s):  
Cheng-Kai Liu ◽  
Wei-Hsuan Chen ◽  
Chung-Yu Li ◽  
Ko-Ting Cheng
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Liquid Crystal Displays ◽  
Quarter Wave Plate ◽  
High Contrast ◽  
Trade Off ◽  
Twisted Nematic ◽  
Quarter Wave ◽  
The Common ◽  
Linear Polarizer

The methods to enhance contrast ratios (CRs) in scattering-type transflective liquid crystal displays (ST-TRLCDs) based on polymer-network liquid crystal (PNLC) cells are investigated. Two configurations of ST-TRLCDs are studied and are compared with the common ST-TRLCDs. According to the comparisons, CRs are effectively enhanced by assembling a linear polarizer at the suitable position to achieve better dark states in the transmissive and reflective modes of the reported ST-TRLCDs with the optimized configuration, and its main trade-off is the loss of brightness in the reflective modes. The PNLC cell, which works as an electrically switchable polarizer herein, can be a PN-90° twisted nematic LC (PN-90° TNLC) cell or a homogeneous PNLC (H-PNLC) cell. The optoelectric properties of PN-90° TNLC and those of H-PNLC cells are compared in detail, and the results determine that the ST-TRLCD with the optimized configuration using an H-PNLC cell can achieve the highest CR. Moreover, no quarter-wave plate is used in the ST-TRLCD with the optimized configuration, so a parallax problem caused by QWPs can be solved. Other methods for enhancing the CRs of the ST-TRLCDs are also discussed.

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