Title :
Vertically Integrated Transflective Liquid Crystal Display Using Multi-Stable Cholesteric Liquid Crystal Film
Author :
Wang, Chun-Ta ; Lin, Tsung-Hsien
Author_Institution :
Dept. of Photonics, Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
The work demonstrates a switchable transflective liquid crystal display using a cholesteric liquid crystal (CLC) film as a switchable reflector. The planar and uniformly-lying helical (ULH) states of CLCs support the reflective and transmissive modes of the display, respectively. Both planar and ULH textures are stable states, and each can be switched to the other via the electro-hydrodynamic effect by applying a low-frequency (30 Hz) electrical field. A transflective display with a CLC as switchable reflector can be utilized in any currently used display mode, such as TN, MVA, and IPS. Such a display exhibits high display performance in both indoor and outdoor environments and low power consumption. It therefore has great potential to be used in portable information systems.
Keywords :
cholesteric liquid crystals; electrohydrodynamics; liquid crystal displays; low-power electronics; CLC switchable reflector; IPS display mode; MVA display mode; TN display mode; electrohydrodynamic effect; frequency 30 Hz; low-frequency electrical field; multistable cholesteric liquid crystal film; planar-ULH; planar-uniformly-lying helical; portable information system; power consumption; reflective display; switchable transflective liquid crystal display; transmissive display; vertically integrated transflective liquid crystal display; Liquid crystal displays; Optical switches; Optimized production technology; Photonics; Substrates; Cholesteric liquid crystal; transflective liquid crystal display;
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2012.2208938
