Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Patent
1997-06-26
2000-08-29
O'Shea, Sandra
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
362354, 362373, 353 52, F21V 2900
Patent
active
061097675
ABSTRACT:
A light trap for a projector, such as an integrated LCD projector, is provided for placement in ventilation channels to prevent escape of light through the channels while allowing free flow of cooling fluid through the channels. The light trap is constructed of material having a honeycomb-like structure, with conduits in the light trap being preferably disposed obliquely between the light source and the duct opening. The light trap may be coated or treated to increase absorption of visible and infrared radiation. A light trap according to this invention not only prevents escape of extraneous light from the projector's ventilation openings, but it assists in controlling the heat load generated by the light source, and it provides less resistance to air flow than does a louvered panel that is typically used to cover a ventilation opening in a projector thus reducing the amount of noise associated with the ventilation system.
REFERENCES:
patent: 3920323 (1975-11-01), Nishitani
patent: 4763975 (1988-08-01), Scifres et al.
patent: 4974132 (1990-11-01), Naum
patent: 5015088 (1991-05-01), Rhomberg et al.
patent: 5187373 (1993-02-01), Gregori
patent: 5285363 (1994-02-01), Meuse
patent: 5692821 (1997-12-01), Rodriguez, Jr. et al.
patent: 5820242 (1998-10-01), Rodriguez et al.
patent: 5826962 (1998-10-01), Rodriguez, Jr.
patent: 5828427 (1998-10-01), Faris
patent: 5876105 (1999-03-01), Rodriquez, Jr.
Ho Nester F.
Minnesota Mining and Manufacturing Company
O'shea Sandra
Peterman Brian W.
Ward John Anthony
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