Projection display

Details Projection display Projection display

2005-02-15

2005-02-15

Nguyen, Judy (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S020000, C353S037000, C353S038000, C353S060000, C353S099000, C353S102000, C348S744000, C359S233000, C349S007000

Reexamination Certificate

active

06854851

ABSTRACT:
A projection display according to the present invention reduces the size of a light beam in the optical path of an illumination optics from the periphery to change the amount of light incident on a video display device and the angle of such incidence, thereby making a plurality of image brightness/contrast combinations selectable. Further, the present invention changes the revolving speed of a projection display cooling fan and the adjustment value settings for the video display device's electrical characteristics in accordance with the aperture.

REFERENCES:
patent: 5519518 (1996-05-01), Watanabe et al.
patent: 3-111806 (1991-05-01), None
patent: 4-63318 (1992-02-01), None
patent: 6-342158 (1994-12-01), None
patent: 2001-222002 (2001-08-01), None

Affiliated with

Also associated with

Rating

Projection display does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projection display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection display will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3453284