Electronic watch
AssigneeKabushiki Kaisha Daini Seikosha
InventorKojiro Tanaka
Life of this patent
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AssigneeKabushiki Kaisha Daini Seikosha
InventorKojiro Tanaka
Estimating the term…
An all electronic watch has an analog minute and hour display comprising two concentric circles of radially disposed LEDs which are energized sequentially in a manner to simulate the movement of the minute and hour hands of a mechanical watch, and a centrally located digital display of date. The circuitry for energizing the LEDs of the analog minute and hour display and the digital date display comprise up-down counters. Amendment of time in a forward direction or in a backward direction is effected by switches actuated by the crown of the watch to feed fast pulses to the counters to operate the counters in a forward direction or in a backward direction as desired. The crown has two operational positions and is rotatable selectively in opposite directions in the manner of a mechanical watch to effect time and date amendment forwardly or backwardly.
An electronic timepiece comprising a case, an electronic analog time display unit for displaying hours and minutes, said analog time display unit comprising a base plate and a circular series of display segments arranged radially on a peripheral portion of said base plate, a digital date display unit in a center portion of said base plate for displaying the date, a minute counter providing output signals to said analog display unit to activate said display segments sequentially to indicate minutes, said minute counter comprising an up-down counter, an hour counter providing output signals to said analog display unit to activate selected ones of said display segments sequentially to indicate hours, said hour counter comprising an up-down counter, a day counter providing output signals to said digital display unit to indicate date, said day counter comprising an up-down counter, a crown on said case having two operational positions and rotatable in opposite directions, modification switch means controlled by said crown, said switch means comprising means for supplying high feed rate pulses selectively to said minute counter and to said day counter and means for selectively switching said counters to an up-counting mode and to a down counting mode so that said high feed rate pulses amend said time display and said date display selectively in a forward direction or in a backward direction.
Dependencies are inferred from the claim text.