Digital electronic timepiece
AssigneeKabushiki Kaisha Daini Seikosha
InventorKojiro Tanaka
Life of this patent
Estimating the term…
Abstract
A digital electronic timepiece, including time measuring means, a display means for displaying a time determined by said time measuring means and for displaying time table information, a memory means for memorizing time table information, and a control means for controlling display of the contents of said memory means. When the time determined by the measuring means coincides with the displayed time information from the memory means, a control signal is applied to the memory means and the next successive time of the time table is displayed. The time information displayed may be time table information including train and working time.
Claims6
A digital electronic timepiece comprising in combination:
- time measuring means including an oscillator circuit for developing an output signal at a certain frequency, a dividing circuit connected to receive the oscillator output signal for developing output pulses at a frequency lower than the frequency of the oscillator output signal, and a counter connected to receive the output pulses from the dividing circuit for counting the same to develop a pulse count representative of time;
- memory means having a plurality of successive addresses for memorizing time table information representative of different times and being successively addressable by a control signal for reading-out successive memorized times;
- display means connected to receive the pulse count representative of time and successive times read-out from said memory means for simultaneously displaying a time represented by the pulse count and a time read-out from said memory means;
- and
- control means comprising a coincidence circuit connected to compare the pulse count with the read-out contents of said memory means for developing a control signal when the times respectively represented by the pulse count and the read-out contents of said memory means coincide, thereby to read-out a next successive time memorized in said memory means and display the same.
A digital electronic timepiece comprising in combination:
- time measuring means for developing a periodically changing digital signal continually representative of present time;
- memory means addressable for reading-out a sequence of stored time information representative of successive times and each stored in a successive address of said memory means;
- display means cooperative with said time measuring means and said memory means for simultaneously displaying the present time and time information read-out from said memory means;
- and
- control means responsive to the periodically changing digital signal developed by said time measuring means and responsive to the time information read-out from said memory means for developing a control signal when the present time and the time information coincide and for applying the control signal to said memory means for reading-out time information stored in a next successive address each time the present time and the time information coincide.
Dependencies are inferred from the claim text.