Liquid crystal cells – elements and systems – Liquid crystal system – Projector including liquid crystal cell
Patent
1993-11-19
1997-01-28
Sikes, William L.
Liquid crystal cells, elements and systems
Liquid crystal system
Projector including liquid crystal cell
349 68, G02F 11335
Patent
active
055982816
ABSTRACT:
An improved backlight assembly comprising an array of apertures in close proximity to a light source, an array of tapered optical elements that have a light input surface area smaller than the light output surface area. Light rays pass through the apertures and are directed to the optical elements which transmit the light rays via internal reflection to provide a partially collimated light source. The light rays then pass through an array of microlenses that transmit the light rays via refraction and provide a substantially more collimated light source for the display elements of a display. The backlight assembly is advantageously used as a backlighting means for electro-optical displays, especially those designed for military and avionics applications.
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Beeson Karl W.
Ferm Paul M.
Zimmerman Scott M.
Allied-Signal Inc.
Dudek James A.
Kreger, Jr. Venge E.
Sikes William L.
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