scholarly journals Reflective Bistable Chiral Splay Nematic Liquid Crystal for Low-Power Heat Sensor

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 5937
Author(s):  
Chao Ping Chen ◽  
Chul Gyu Jhun
Keyword(s):  
Liquid Crystal ◽  
Low Power ◽  
Memory Effect ◽  
Nematic Liquid Crystal ◽  
Matrix Method ◽  
Contrast Ratio ◽  
Jones Matrix ◽  
Long Time ◽  
Heat Sensor ◽  
Memory States

The memory effect of the bistable liquid crystal mode is able to maintain the display information for a long time. The splay state and π twist states are used as the memory states of the bistable chiral splay nematic (BCSN) mode. The transition time from the π twist state to the splay state is sensitive to the temperature. In this paper, for the heat sensor application, the reflective structure of the BCSN mode has been studied by the Jones matrix method. In experiments, the measured contrast ratio can be over 200 with a minimal reflective structure including a single polarizer and a reflector.

Novel Memory Effect Found in Nematic Liquid Crystal/Clay Mineral Composites

1996 ◽  
Vol 425 ◽  
Author(s):  
M. Kawasumi ◽  
N. Hasegawa ◽  
A. Usuki ◽  
A. Okada ◽  
T. Kurauchi
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Electric Field ◽  
Memory Effect ◽  
Clay Mineral ◽  
Nematic Liquid Crystal ◽  
Liquid Crystalline ◽  
Optical Effect ◽  
Scattering States ◽  
Memory States

AbstractNovel liquid crystalline composites composed of a nematic two-frequency-addressing liquid crystal and organized clay mineral have been prepared. The particles of the clay mineral were dispersed homogeneously in the liquid crystal. The composite cells displayed a reversible and multistable electro-optical effect between transparent and turbid light scattering states by changing the frequency of the electric field. The light transmittances of both transparent and light scattering memory states did not change after 15 hrs without the electric field applied.

Sign in / Sign up

Export Citation Format

Share Document