Projection system and method of forming color image

Details Projection system and method of forming color image Projection system and method of forming color image

2005-04-12

2005-04-12

Dowling, William C. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C348S743000, C353S097000

Reexamination Certificate

active

06877861

ABSTRACT:
A projection system and method are provided. The projection system includes a light source, at least one filter having a slit, a scrolling unit, a color separator, and a light valve. The slit in the at least one filter controls a divergence angle of light emitted from the light source. The scrolling unit scrolls an incident beam. The color separator has a plurality of dichroic filters which separate an incident beam emitted from the light source according to color. The light valve receives a plurality of color beams from the color separator and transmitted by the scrolling unit on corresponding color areas and forms a plurality of color bars by scrolling the color beams. A black bar is formed between adjacent color bars by controlling a distance between adjacent dichroic filters or by controlling the width of the slit in the at least one filter.

REFERENCES:
patent: 6591022 (2003-07-01), Dewald
patent: 6619802 (2003-09-01), Janssen et al.
patent: 6642969 (2003-11-01), Tew
patent: 6771325 (2004-08-01), Dewald et al.
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patent: 20020191154 (2002-12-01), Shahzad et al.
patent: 11-281930 (1999-10-01), None
patent: 1999-00234 (1999-01-01), None

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