Projector

Details Projector Projector

2007-07-17

2007-07-17

Fuller, Rodney (Department: 2851)

Optics: image projectors

Plural

C353S030000, C353S085000

Reexamination Certificate

active

10854286

ABSTRACT:
A liquid crystal projector for full-color image projection has three LCD panels as light valve device, associated with respectively primary colors, for displaying an image in a color-separated manner. An ultra high pressure mercury lamp illuminates the LCD panels through three illuminating light paths associated with respectively the primary colors. A combining prism combines image light of the primary colors from the three LCD panels, to obtain full-color image light. A laser diode emanates auxiliary illuminating light of a red color among the primary colors according to laser emission, to compensate for shortage in light intensity in the red color. A ferroelectric shaking or vibrating device vibrates the laser diode, to keep visual noise inconspicuous in the auxiliary illuminating light.

REFERENCES:
patent: 4011403 (1977-03-01), Epstein et al.
patent: 4170397 (1979-10-01), Botcherby et al.
patent: 6317169 (2001-11-01), Smith
patent: 6561654 (2003-05-01), Mukawa et al.
patent: 6594090 (2003-07-01), Kruschwitz et al.
patent: 2004/0196443 (2004-10-01), Tomita et al.
patent: 2001-148345 (2001-05-01), None

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