TIME CORRECTION CIRCUIT OF ELECTROCHROMIC DISPLAY WATCH

摘要

PURPOSE:To perform desired time correction rapidly by ON-operating correction switch groups while a correction mode select switch is ON. CONSTITUTION:The reference signal from a reference signal generating part 10 including a crystal oscillator etc. is converted to a pulse train of desired frequency through a frequency dividing circuit 12, after which it is supplied to a watch circuit 14. A correction pulse generating circuit 58 outputs the write-erase pulses for time correction of a pulse width smaller than the write-erase pulses for time displaying. A write control circuit 46 performs writing and erasing of an EC display part 28, and performs the action of controlling the timing thereof by the select mode of a correction mode select switch 48. Desired time correction may be performed by turning ON any of correction switch groups 52 every one time while the switch 48 is ON.