Rear projection display

Details Rear projection display Rear projection display

2005-03-01

2005-03-01

Nguyen, Judy (Department: 2851)

Optics: image projectors

Lamp control

C353S077000, C353S094000, C353S122000, C362S227000

Reexamination Certificate

active

06860608

ABSTRACT:
A rear projection display is provided which can clearly display a display screen and enable positive recognition of acceptance of operation of a power switch while preventing increases in manufacturing costs and size of the display. A liquid crystal light valve modulates light emitted from a light source lamp to light for displaying a displayed on a screen. An auxiliary lamp higher in a rate of increase in luminance at start of illumination than the source lamp is arranged such that light from the auxiliary lamp can reach a rear surface side of the screen without passing through the liquid crystal light valve. A main control section causes the light source lamp and the auxiliary lamp to both illuminate at power on, and the auxiliary lamp to extinguish before luminance of the source lamp becomes high enough to cause the display screen to be displayed by projection.

REFERENCES:
patent: 5829855 (1998-11-01), Uchiyama
patent: 6467911 (2002-10-01), Ueyama et al.
patent: A 2002-139794 (2002-05-01), None

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