Liquid crystal projection system having three different color be

Details Liquid crystal projection system having three different color be Liquid crystal projection system having three different color be

1995-06-27

1997-04-22

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 95, 349106, G02F 11335

Patent

active

056233493

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 comprising microlens elements (42) overlying groups of display elements that direct light from the beams through respective sets of display elements, and a projection lens (30) projects the output beams from the panel onto a screen (31), the beam geometries are selected such that at a position spaced from the output side of the panel the three output beams pass respectively through substantially separate areas and filter means (50) are disposed at that position to remove unwanted color stray light at each area thus improving color purity. Each microlens element of the array directs light from one color beam onto one display element and light from the other two beams onto respective display elements which are not immediately adjacent that one display element.

REFERENCES:
patent: 5121030 (1992-06-01), Schott
patent: 5159478 (1992-10-01), Akiyama et al.
patent: 5161042 (1992-11-01), Hamada
patent: 5187599 (1993-02-01), Nakanishi et al.

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