Projector

Details Projector Projector

2006-04-18

2006-04-18

Dowling, William C. (Department: 2851)

Optics: image projectors

Color filter

C353S031000

Reexamination Certificate

active

07029127

ABSTRACT:
A projector includes a light source, a color separating optical system, liquid crystal panels, a cross dichroic prism, and a projection lens, in which an optical filter is disposed to reflect a predetermined spectral component in the light flux between a dichroic mirror and a dichroic mirror where an angle by which the light flux expands falls within 20° with respect to an illumination optical axis L of the light flux on an optical path from the light source device to a light flux-emitting surface of the projecting lens. Thus, carrying out spectrum correction can reduce or prevent the contrast degradation of the projected image. Furthermore, it allows the difference of an incident angle to the light flux-incident surface of the light flux to be smaller, thereby reducing color unevenness.

REFERENCES:
patent: 5946114 (1999-08-01), Loiseaux et al.
patent: 6783244 (2004-08-01), Okuyama et al.
patent: 6824276 (2004-11-01), Kimura
patent: 08-304739 (1996-11-01), None
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patent: 2000-347292 (2000-12-01), None
patent: A-2001-174774 (2001-06-01), None
patent: A-2001-228536 (2001-08-01), None
patent: 2001-264744 (2001-09-01), None
patent: 2002-174805 (2002-06-01), None

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