Light source device of liquid crystal projector

Details Light source device of liquid crystal projector Light source device of liquid crystal projector

1997-12-03

1999-12-21

Sember, Thomas M.

Illumination

Light source and modifier

With ventilating, cooling or heat insulating means

362373, 362360, 362351, F21V 2900

Patent

active

060040106

ABSTRACT:
A liquid crystal projector having a light source device which comprises a first reflective mirror surrounding a light source; a second reflective mirror which is disposed before the first mirror in the light emission direction and has a convergent shape with respect to the light source; a lamp house surrounding the light source, the first and second mirrors, and having an opening for cooling the light source positioned behind the first mirror; a first lamp shade disposed behind the light source and the first mirror, and having an area of an appropriate transverse cross section of a phantom cone or pyramid which is defined by a series of phantom linear lines connecting the light source and the contour of the opening for cooling the light source; and a second lamp shade disposed outside a curved wall of the first mirror and before the light source.

REFERENCES:
patent: 4630182 (1986-12-01), Moroi et al.
patent: 4885668 (1989-12-01), Maglica et al.
patent: 5034866 (1991-07-01), Pujol
patent: 5138541 (1992-08-01), Kano
patent: 5207505 (1993-05-01), Naraki et al.

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