Back light device for uniformly illuminating a liquid crystal di

Details Back light device for uniformly illuminating a liquid crystal di Back light device for uniformly illuminating a liquid crystal di

1987-02-09

1988-08-23

Myhre, Charles J.

Illumination

Illuminated scale or dial

Internal light source

362216, 362260, G01D 1128

Patent

active

047665246

ABSTRACT:
A back light device for uniformly illuminating a liquid crystal display plate comprises a fluorescent lamp having a luminous tube formed by being turned up through a coupling in the same plane, a liquid crystal display plate to be illuminated by the light radiated from the fluorescent lamp, a diffused plate interposed between the liquid crystal display plate and the fluorescent lamp in parallel to the plane, and a reflector for reflecting the light radiated from the fluorescent lamp toward the diffused plate.

REFERENCES:
patent: 3890777 (1975-06-01), Stanish
patent: 3920311 (1975-11-01), Tsuda et al.
patent: 4184194 (1980-01-01), Shofu
patent: 4382272 (1983-04-01), Quella et al.
patent: 4425604 (1984-01-01), Imai et al.
patent: 4510560 (1985-04-01), Negishi
patent: 4528617 (1985-07-01), Blackington
patent: 4564890 (1986-01-01), Poyer
patent: 4642736 (1987-02-01), Masuzawa et al.
patent: 4648690 (1987-03-01), Ohe
patent: 4656561 (1987-04-01), Shinbo et al.

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