Multiplexed LCD analog timepiece

Details Multiplexed LCD analog timepiece Multiplexed LCD analog timepiece

1980-10-14

1982-12-07

Miska, Vit W.

Horology: time measuring systems or devices

Displays or display device details

Optical

368242, G04C 1702

Patent

active

043623980

ABSTRACT:
An LCD analog timepiece employs a multiplexing driving circuit to supply voltages to the liquid crystal display segments in the proper sequential relationship so as to activitate the desired portions of the display in time-multiplex fashion to show hours, minutes and seconds. The multiplex driving circuit connects a minimum number of combinations of simple waveforms in proper phase to one or more of 16 strings of radial segments and to one or more of 8 backplane segments in a prescribed manner. Special radial segments are located so as to straddle the juncture of the backplane segments, in order to simplify circuit connections for using an hour hand which appears to be three segments wide.

REFERENCES:
patent: 4076385 (1978-02-01), Kondo
patent: 4110967 (1978-09-01), Fujita
patent: 4242747 (1980-12-01), Fahrenschon
patent: 4254488 (1981-03-01), Ojima et al.
patent: 4312055 (1982-01-01), Noble
patent: 4555806 (1981-03-01), Fahrenschon et al.

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