Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1978-05-05

1980-06-03

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With electro-optical display

350345, 368226, 368242, G02F 113, G04B 1930

Patent

active

042055229

ABSTRACT:
A liquid crystal display device, especially, for use in a liquid crystal display watch is disclosed, which is provided with a liquid crystal display element and a reflector comprising a luminescent phosphor, and only in a limited partial area of the reflector corresponding to a specified display portion which should be visible in the dark or at night in the whole time display area of the liquid crystal display element, the luminescent phosphor includes a radioactive nuclide such as promethium (.sup.147 Pm) or tritium (.sup.3 H).

REFERENCES:
patent: 3841083 (1974-10-01), Bercet
patent: 3950078 (1976-04-01), Zatsky
patent: 4042294 (1977-08-01), Billings, Jr. et al.
patent: 4126384 (1978-11-01), Goodman et al.

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