Efficient optical system for a high resolution projection displa

Details Efficient optical system for a high resolution projection displa Efficient optical system for a high resolution projection displa

1997-08-13

1998-07-28

Lee, Michael H.

Television

Video display

Projection device

348751, 348757, 353 34, 353 37, 349 62, H04N 931, H04N 574

Patent

active

057868735

ABSTRACT:
An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. The system includes a quarter wave plate positioned to suppress stray reflection from the projection lens. The system also includes a second quarter wave plate disposed on the screen and a polarizing film disposed on the second quarter wave plate to suppress ambient light from illuminating the screen and entering the system.

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