Electronic calculator watch structures

Details Electronic calculator watch structures Electronic calculator watch structures

G - Physics

04

C

354/147, 375/8,

G04C 17/00 (2006.01) G04G 9/00 (2006.01) G04G 9/08 (2006.01) G04G 17/08 (2006.01) G06F 3/14 (2006.01) G06F 7/48 (2006.01) G06F 15/02 (2006.01)

Patent

CA 1036728

ABSTRACT There is disclosed an integral instrument providing timekeeping and display with calculator functions and display accomplished by means of a keyboard assembly mounted on the watch easing and adapted to be worn about a user's wrist. Included is time sharing circuitry to enable common display drivers for the timekeeping and calculating modes as well as power sharing circuitry to enable the use of inexpensive and reliable P-MOS circuitry in the calculator mode without constantly dissipating power. A time-zone setting circuit utilizes logic circuitry to automatically enable the user to change time by direct access to the existing keyboard assembly.

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