Active matrix LCD projection system with anti-reflective charact

Details Active matrix LCD projection system with anti-reflective charact Active matrix LCD projection system with anti-reflective charact

1991-03-04

1992-09-22

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 40, G02F 11335, G02F 11333

Patent

active

051502380

ABSTRACT:
The projection system includes a light source, a lens for focussing the light rays, an active matrix LCD panel disposed and spaced between a pair of glass panels and a lens and mirror system for projecting the LCD image onto an enlarged surface. To minimize, eliminate or attenuate ghosting of the images caused by secondary reflections from the upper glass panel back onto the LCD, the undersurface of the upper glass panel is coated with a high-efficient, anti-reflecting material, such as including magnesium fluoride, whereby high-contrast ratio images are maintained and not degraded by secondary reflections in the optical system.

REFERENCES:
patent: 4534622 (1985-08-01), Harada et al.
patent: 4556288 (1985-12-01), Sekimura
patent: 5056895 (1991-10-01), Kahn

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