Liquid crystal channel number display responsive to ambient ligh

Details Liquid crystal channel number display responsive to ambient ligh Liquid crystal channel number display responsive to ambient ligh

1978-03-27

1980-01-01

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358161, 358192, H04N 9535, H04N 558

Patent

active

041819160

ABSTRACT:
The channel number display apparatus for a television receiver includes a liquid crystal device. A lamp is positioned with respect to the liquid crystal display device to selectively illuminate it under low ambient light conditions. The lamp is automatically turned on in response to a signal generated by an ambient light sensing circuit which is also utilized to control the contrast and color level characteristics of the receiver in response to ambient light conditions.

REFERENCES:
patent: 3747322 (1973-07-01), Eckenrode
patent: 3753119 (1973-08-01), Close
patent: 3961361 (1976-06-01), Avins et al.
patent: 4051664 (1977-10-01), Ishikawa
Mostek, Mos Clock Radio Circuit, MK50380n, Jan. 1975, 7 pages.

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