Projection display device

The invention relates to a projection display device having an illumination system comprising a light source and an optical system for providing an illumination beam. The projection display device is further provided with an image display system for modulating the illumination beam with image inform...

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Bibliographic Details
Main Authors SOOLS, FRANCISCUS GUILLAUME PETER, HADDEMAN, THEODOOR BASTIAAN JOHANNES, SCHAAREMAN, PAULUS BARTHOLOMEUS JOHANNES
Format Patent
LanguageEnglish
Published 11.03.2004
Edition7
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:The invention relates to a projection display device having an illumination system comprising a light source and an optical system for providing an illumination beam. The projection display device is further provided with an image display system for modulating the illumination beam with image information and projecting an image on a screen. In order to filter ultra-violet and infra-red radiation from the light source, a filter means is present which transmit visible light. Cooling means comprising a cooling liquid are present for cooling the filter means. In the projection display device the filter means comprises the cooling liquid which contains a radiation-absorbent additive for absorbing the ultra-violet and infra-red radiation.
Bibliography:Application Number: TW200291120282