Computer graphics processing and selective visual display system – Plural physical display element control system – Optical means interposed in viewing path
Patent
1995-10-10
1998-05-26
Saras, Steven
Computer graphics processing and selective visual display system
Plural physical display element control system
Optical means interposed in viewing path
345 87, 349 57, 349 95, G09G 336
Patent
active
057573417
ABSTRACT:
In a color liquid crystal projection display in which three differently-colored illuminating beams (R,G,B) are incident from mutually different directions on an LC panel (20) having an array of display elements (40) with a microlens array (21) at the input side of the panel end of whose elements (42) overlies a respective group of three adjacent display elements in row or delta configuration and through each of which light of the three colours (R,G,B) is directed at different angles respectively and converged towards respective ones of the display elements in its associated group, a deflecting element array (25), comprising, for example, microlens element (44) or microprisms (46) formed in a glass substrate of the panel, is positioned close to the plane of the display elements to deflect the directions of light of at least two of the three colours from each microlens element (42) to bring the directions of light of the three colours at the output side of the panel towards a common direction, and preferably substantially parallel to one another. A significant reduction in the amount of spread of light if the output side is thereby achieved, such that, inter alia, a comparatively small aperture projection lens (30) can be used.
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Carmichael Allan
Clarke John A.
Stroomer Martinus V.C.
Egbert, III Walter M.
Saras Steven
U. S. Philips Corporation
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