Chromatically-adjusted holographically illuminated image-providi

Details Chromatically-adjusted holographically illuminated image-providi Chromatically-adjusted holographically illuminated image-providi

1997-02-28

2000-09-19

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 1, G03H 100, G02B 532

Patent

active

061220795

ABSTRACT:
Reflective image-providing displays illuminated with chromatically-adjusted holographically diffused light are provided. In one particular and preferred embodiment, a liquid crystal display component is presented comprising a liquid crystal display element backed with a reflective transmission holographic diffuser. Chromatic adjustment is effected by the inclusion in said liquid crystal display component of a compensatory filter layer of relatively low density designed to restore the ambient color balance of input light, the balance being otherwise upset by transit through said liquid crystal display element. Achromatically illuminated images of good contrast are displayed and viewed from the liquid crystal display component under ambient lighting conditions.

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