Optics: image projectors – Particular condenser
Patent
1995-05-12
1997-07-22
Dowling, William
Optics: image projectors
Particular condenser
353 30, 353 85, 353 38, G03B 2114
Patent
active
056497539
ABSTRACT:
A projection display apparatus includes a light source, a light valve, and a projection lens. The light source includes at least two luminous elements, a plurality of light condensing devices provided in the same number as the luminous elements, and a light transmitting device for transmitting the light beams outgoing from the respective light condensing devices to the light valve in a superimposed state. The light transmitting optical device forms actual images of the plurality of luminous elements on an optical path thereof so that the actual images are substantially inscribed in a circle on the same, single plane. The projection display apparatus further includes a device for lighting up at least one of the plurality of luminous elements selectively so as to change the brightness of the image displayed by projection by steps.
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Search Report for European Appl. 95107338.5, mailed Sep. 5, 1995.
Dowling William
Matsushita Electric - Industrial Co., Ltd.
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