Reverse-Mode Polymer-Stabilized Dual-Frequency Cholesteric Texture Cell for Dual Mode Operations

We demonstrated a polymer-stabilized dual-frequency cholesteric texture (PSDFCT) cell that functions smoothly in both dynamic switch and steady bistable usage, dual mode operation. The PSDFCT cell is a reverse-mode texture device containing a cholesteric liquid crystal (ChLC) and polymeric mixture....

Full description

Saved in:
Bibliographic Details
Published in:Journal of display technology 2012-11, Vol.8 (11), p.663-668
Main Authors: Wang, Che-Hsyan, Wu, Cheng-Che, Yang, Ya-Ting, Chiu, Tien-Lung, Lee, Jiunn-Yih, Lee, Jiun-Haw
Format: Article
Language:English
Subjects:
Alternating current
Anisotropic magnetoresistance
Bias
Bistable operation
Dielectrics
dynamic switch
Electric potential
Force
Networks
Optical switches
polymer network distortion
polymer-stabilized dual-frequency cholesteric texture (PSDFCT)
Polymers
Surface layer
Switching theory
Texture
Time factors
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrated a polymer-stabilized dual-frequency cholesteric texture (PSDFCT) cell that functions smoothly in both dynamic switch and steady bistable usage, dual mode operation. The PSDFCT cell is a reverse-mode texture device containing a cholesteric liquid crystal (ChLC) and polymeric mixture. As polymer concentration increases, the PSDFCT cell exhibits increasing operational voltage and diminishing contrast ratio, which results from the increasing polymer network anchoring force to firmly stabilize the ChLC texture. Switching from planar texture to focal-conic texture is triggered by applying a threshold alternating current (AC) bias at low frequency (60 Hz). The opposite change, from focal-conic to planar texture, is achieved by varying the AC bias frequency from low (60 Hz) to high (35 kHz). The dual dielectric anisotropies of ChLC allow efficient dynamic switching by varying the bias frequency. Under bistable operation, a larger AC bias voltage generates polymer network distortion, directly affecting the ChLC mixture. The reciprocal switch, between planar texture and focal-conic texture, is performed at the greater AC bias by varying bias frequency.
ISSN:1551-319X
1558-9323
DOI:10.1109/JDT.2012.2215838