D-ILA modulators and projectors based on LCOS (liquid crystal on silicon) technology have been developed. The compact reflection-mode modulators have resolution of up to 3840 x 2048 pixels for projection display applications including simulation and visualization. The Evans and Sutherland VistaView head tracked area of interest system has evolved from 1992 to incorporate many display improvements. The paper reviews D-ILA technology and the incorporation of D-ILA projectors into the VistaView system.
D-ILA modulators and projectors based on LCOS (liquid crystal on silicon) technology have been developed. The compact reflection-mode modulators have resolution of up to 2048 x 1536 pixels for projection display applications. Research projectors have demonstrated resolution of 3840 x 2048 pixels. D-ILA projectors feature high contrast and a close-spaced pixel structure that creates high quality imagery. The structure of the D-ILA will be reviewed and current performance of D-ILA projectors characterized.
A stereoscopic projection system for displaying 3-D video
information has been constructed using Liquid Crystal Light Valves
(LCLV5) . Presently most stereoscopic displays of video imagery use a
single CRT with a liquid crystal or PLZT shutter1'2 or use two CRT5 with
orthogonally polarized outputs3. The advantage of the first method is
only one CRT is needed and image convergence is not a problem. However,
whether passive or active glasses are used for the field-sequential
viewing, ghost images are formed due to the finite phosphor decay time1.
A dual CRT projector 3-D display has the advantage that passive glasses
can be easily employed with virtually no ghost images. The luminous
output of the projector, though, is reduced by half during the initial
In a Liquid Crystal Light Valve projector the output light is
linearly polarized in normal operation. Therefore a two-projector 3-D
stereoscopic system using LCLVs can be realized which has very low
intensity ghost images, high luminous output, and can be viewed with
passive glasses. This paper discusses some potential configurations of
such a projector and how a newly developed LCLV with improved time
response makes real-time 3-D imaging using this technology possible.