Solid state electronic timepiece with lamp

Details Solid state electronic timepiece with lamp Solid state electronic timepiece with lamp

1978-11-22

1981-04-14

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With auxiliary illumination for display

368 82, 368227, G04B 1930, G04C 1900

Patent

active

042623502

ABSTRACT:
A solid state electronic timepiece including an intermittent supplemental functional capability, e.g., a lamp to illuminate the display, also includes a circuit for the prevention of an undesirable supply voltage drop due to circuit loading by the supplemental function during performance of a primary intermittent timekeeping function, e.g., shifting the contents of a shift register. The supplemental function is turned off during the primary intermittent timekeeping function. In an alternative embodiment, the initiation of the supplemental function is delayed to follow completion of the primary intermittent timekeeping function.

REFERENCES:
patent: 3759029 (1973-09-01), Komaki
patent: 3802182 (1974-04-01), Fujita
patent: 4051664 (1977-10-01), Ishikawa
patent: 4091611 (1978-05-01), Fukuichi

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