Miniature Color Display Phase 4
Abstract
A 400 x 300-pixel miniature color display with a resolution of 300 pixels/inch, yielding a 1.3 x 1.0-inch active area, has been demonstrated for helmet-mount applications. The display uses active-matrix subtractive-crystal technology. This approach produces high luminance and full color at each pixel without the loss in addressable resolution that is associated with conventional additive-color displays. A stack of three active-matrix twisted-nematic liquid- crystal light valves, sandwiching cyan, magenta, and yellow color polarizers, is used to generate full color. By spectral tuning of the xenon arc-lamp backlight and the color polarizers, a color gamut comparable to that of a shadowmask color CRT is achieved. Four bits of grayscale are provided for each of the three color primaries, yielding a total availability of 4096 colors. the display produces a peak white luminance of 3500 fL and has an inherent (i.e., dark-field) contrast ratio of 50:1. The preceding figures are sufficient to achieve a 2:1 contrast ratio against a 10,000 fL ambient scene, using typical helmet-mounted display optics. The display refresh rate is 68 Hz. Liquid-crystal, Display color, Miniature, Helmet-mounted
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1993
- Accession Number
- ADA272920
Entities
People
- Henry Franklin
Organizations
- Honeywell International, Inc.