Method and apparatus for reducing scattered light in projection

Details Method and apparatus for reducing scattered light in projection Method and apparatus for reducing scattered light in projection

1993-05-03

1995-02-07

Groody, James J.

Television

Video display

Projection device

348834, 348746, 348786, H04N 931, H04N 574

Patent

active

053879481

ABSTRACT:
To prevent light scattering at the edges of CRT's used in projection television, emission of light is prevented beyond a desired region of raster scanning. In one embodiment, portions of the front surfaces of the CRT's outside the desired region are darkened to prevent light emission.

REFERENCES:
patent: 4388642 (1983-06-01), Reno, Jr. et al.
patent: 4393329 (1983-07-01), Lehnert
patent: 4405949 (1983-09-01), Hockenbrock et al.
patent: 4432011 (1984-02-01), Lehnert
patent: 4591757 (1986-05-01), Bakker et al.
patent: 4675571 (1987-06-01), Bakker et al.
patent: 4737678 (1988-04-01), Hasegawa

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