Share Email Print

Optical Engineering

High Data Density Four-Color Liquid Crystal Display
Author(s): Robert C. Tsai
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A very high resolution and high contrast laser-addressed liquid crystal color display has been developed for use in the acquisition and exploitation of high density alphanumeric and graphic data. The display system consists of two smectic liquid crystal light valves (SLCLV) which are thermally addressed by a single laser selectively. Each light valve is capable of generating 2048 X2048 addressable pixels within a 1 in. X1 in. data format. There are 8 X106 pixels available for data presentation. The laser writing system consists of the laser, a modulator which enables the formation of discrete data elements on the SLCLV, a two-axis galvanometer deflection unit, and beam splitting optics designed to multiplex the writing laser on each SLCLV. A closed-loop galvanometer deflection system can position the focused laser beam to an accuracy of 0.01 % across the screen. The laser focus lens is an f/8.0 telecentric designed to produce a 2.54 cm X2.54 cm (1 in. X1 in.) data format on the SLCLV with spot size less than 10 ,um (0.0004 in.). Color images from each light valve are superimposed onto ' the screen by a wide angle f/8.0 projection lens with 48X magnification which relays the combined color image to a 1.2 m X 1.2 m (48 in. X48 in.) screen with less than 0.1 % of distortion. The possible contrast of the display is up to 60 to 1. The overall dimension of the rear projected color display is 1.52 m X3.2 m X0.74 m (60 in. X52 in. X29 in.).

Paper Details

Date Published: 1 June 1982
PDF: 4 pages
Opt. Eng. 21(3) 213565 doi: 10.1117/12.7972947
Published in: Optical Engineering Volume 21, Issue 3
Show Author Affiliations
Robert C. Tsai, The Singer Company (United States)

© SPIE. Terms of Use
Back to Top