Enhancement of surface anchoring energy in low power consumption transflective liquid crystal displays with three display modes

摘要

Power consumption saving in transflective liquid crystal displays (TR-LCDs) with three display modes was proposed in our previous study [1]. Two of the display modes in the TR-LCD are designed to reduce power waste in common TR-LCD under dim/strong ambient lights environment. The required surface anchoring energy (SAE) of the previous design (2.0436 x 10(-5) J/m(2)) is too weak for practical fabrication processes. The SAE of the new TR-LCD proposed in the current work is increased to 1.2238 x 10(-4) J/m(2). However, the tradeoff is the relatively high operation voltage, which is effectively reduced by compensation films (CMPFs). The design of CMPFs and the impact of cell gap and SAE errors on the dark state of TR-LCDs are investigated in detail. Comparisons between our previous work and the current study are also made. Further discussions on power saving concept of the TR-LCD are given in detail. Moreover, the fabrication example to approach such TR-LCDs using dual-pretilt-angle method based on photo manners is proposed. The reported results can give useful references about CMPF5 design for TR-LCDs and/or other types of LCDs.