Self-luminescent light source for liquid crystal display watch

Details Self-luminescent light source for liquid crystal display watch Self-luminescent light source for liquid crystal display watch

1979-04-11

1981-06-30

Jackmon, Edith S.

Horology: time measuring systems or devices

Displays or display device details

With auxiliary illumination for display

368242, 250463, 313 54, 350345, 362159, G04G 912, G04B 1930, G04C 1700, G02F 113

Patent

active

042766338

ABSTRACT:
A self-luminescent light source for a liquid crystal display watch characterized by comprising a fluorescent substance layer which has a light reflectivity and which contains a radioactive substance in at least a part thereof, a reflective layer which is disposed on one surface of the fluorescent substance layer and which serves to reflect and scatter fluorescence from the fluorescent substance layer, a case which is disposed on the side of the reflective layer remote from the fluorescent substance layer and which serves to perform shielding from radiation given out from the radioactive substance, and a cover which is disposed on the side of the fluorescent substance layer remote from the reflective layer and which serves to absorb the radiation given out from the radioactive substance and to transmit the light from the fluorescent substance layer.

REFERENCES:
patent: 3043710 (1962-07-01), Patten et al.
patent: 3409770 (1968-11-01), Clapham, Jr.
patent: 3478209 (1969-11-01), Feller
patent: 3950078 (1976-04-01), Zatsky
patent: 4126383 (1978-11-01), Doriguzzi et al.
patent: 4126384 (1978-11-01), Goodman et al.

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