Abstract
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.
© 2012 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy