Dual-antiferroelectric liquid crystal display with high transmittance efficiency and no dispersion

Abstract

When an antiferroelectric liquid crystal (AFLC) cell is set between crossed polarizers for optical modulators or displays, it has low transmittance efficiency. This happens because AFLC materials have inherent tilt angles of typically 18 to 38 deg, not 45 deg. To improve the low transmittance efficiency, we propose a new optical configuration for antiferroelectric liquid crystal displays or devices, which also improves color dispersion. It consists of two crossed antiferroelectric liquid crystal cells. The characteristics of this dual-antiferroelectric liquid crystal display are simulated and experimented.

Transflective Antiferroelectric Liquid Crystal Display for High-Efficiency Transmittance and Reflectance

“…In this paper, we propose a new optical configuration of TR-AFLCD, which has high efficiency for both transmissive and reflective modes, using two AFLCD cells. 11) Our TR-AFLCD improves not only the low brightness but also the inferior dispersion characteristics caused by the intrinsic tilt angle of AFLCs.…”

“…2(c), the dark and bright states of the reflective and transmissive modes satisfy the achromatic condition. [11][12][13] Although the paths in Fig. 3(c) cannot compensate for each other perfectly, it still meets the wide-band requirement.…”

14.3: Optical Configuration for Transflective Mode Using Dual ‐ Antiferroelectric Liquid Crystal Cell for High Transmittance efficiency

“…In the configuration of a transflective AFLCD mode we proposed before, only reflective mode has good characteristics [16]. In this paper, using Dual-AFLCD [17], we propose a new transflective AFLCD mode which has excellent electro-optic characteristics for both the transmissive and reflective modes.…”

P‐100: Driving Technique for Grayscale in Dual‐Antiferroelectric Liquid Crystal Display

“…Antiferroelectric Liquid Crystals (AFLCs) [1][2][3][4][5][6][7][8][9][10][11] have been extensively studied because they are suitable for fast switching electrooptic light modulators and displays. Fast response time, steep threshold, and symmetrical hysteresis loop of AFLCs allows passive matrix driving that has many advantages such as low power consumption, low fabrication cost and simple manufacturing process.…”