Reflective Single Polariser Low and High Twist Liquid Crystal Displays

Abstract

This paper discusses recent development of direct view single polariser reflective displays. Key elements in the design of such displays are described. It is shown that a high contrast ratio display with wide viewing angle and fast response time can readily be achieved, and a new display with these characteristics is presented.

29.1: Unified Study of Twisted Nematic Reflective Modes for LCoS

“…Studies show that there is a continuous selection of twist angles possible for normally white (NW) operation, as well as for normally black (NB) modes of operation based on the generalized Gooch-Tarry condition. [4,5] In this paper we use NW and NB to refer to the reflectance of the undriven state using polarizing beamsplitter (PBS) optics common for liquid crystal on silicon (LCoS) devices. For a direct view device with a single polarizer NB and NW would be interchanged.…”

“…The R = 0 curve is discussed in §3.1.. The well-known solutions[4] to Eq. (1) for the thinnest cell gaps where R = 1, i.e.…”

P‐87: Optical Configuration of a Horizontal‐Switching Cell for a High‐Performance Reflective LCD

“…Lately, reflective liquid crystal displays (LCD's) have been widely used because of their low consuming power and light weight. In general, the single polarizer mode is considered as a suitable structure for reflective LCDs because they can provide high reflectance in the bright state [1][2][3][4]. However, contrast of a single-polarizer reflective LCD is usually lower because of the light leakage in the dark state.…”