Display apparatus

Details Display apparatus Display apparatus

2007-01-31

2008-10-21

Koval, Melissa Jan (Department: 2862)

Optics: image projectors

Composite projected image

C353S052000, C353S084000, C353S085000, C315S117000, C349S072000

Reexamination Certificate

active

07438420

ABSTRACT:
A display apparatus having a control unit which controls the light source temperature so that the temperature remains within a predetermined temperature range, a light modulation device for displaying images by receiving light emitted from the light source, and modulating the light according to the image data, and a light source controlling unit which adjusts the amount of light that enters the light modulation device, by controlling electrical power fed to the light source, according to the brightness data. Even if a contrast ratio is improved by changing the amount of light of an HID lamp, a passive optical modulation type display apparatus can be provided without reducing the lifetime of the light source lamp.

REFERENCES:
patent: 5717422 (1998-02-01), Fergason
patent: RE36060 (1999-01-01), Miyashita
patent: 7052143 (2006-05-01), Russell et al.
patent: 62-19835 (1987-01-01), None
patent: 5-66501 (1993-03-01), None
patent: 6-160811 (1994-06-01), None

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