Projection type display device

Details Projection type display device Projection type display device

1993-07-06

1995-05-02

Groody, James J.

Television

Video display

Projection device

348786, 348834, 359601, 313478, H04N 574

Patent

active

054124379

ABSTRACT:
A projection type display device including a CRT with a fluorescent layer and a face glass for projecting an image reflected onto the fluorescent layer through the face glass, a transparent liquid, at least one lens element and onto a screen. The transparent liquid is filled within a space between the face glass of the CRT and the at least one lens element and has a refractive index substantially the same as a refractive index of the face glass of the CRT and the at least one lens element. A light attenuation filter having a transmittance no greater than 0.9 is disposed at a position from the fluorescent layer to the at least one lens element such as between the face glass and the at least one lens element.

REFERENCES:
patent: 4777532 (1988-10-01), Hasegawa

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