JPS5476185A - Electronic watch - Google Patents

Abstract

PURPOSE:To provide a time correction circuit of not requiring any safety switch by detecting the operation sequence of touch switches and controlling the locking of correctable state. CONSTITUTION:The operation sequence of a digit selecting touch switch 16 and a correcting touch switch 18 is detected with the AND gate 52, FF 54, AND gate 56, FF 64, etc. of an operation sequence detection control circuit 36. When the specified operations of these are made, a timer circuit 60 makes timer action by way of an OR circuit 58. During this timer period, the set output of the FF 64 opens AND gates 72, 74 and through the gate 74 the digit signal by a digit selection circuit 34 constituted by a shift register 31 is selected and the time is corrected by way of the counter of the specified digit of a watch counter 26 connecting to the AND gates 76, 78, 80 which are opened by way of the gate 72 according to the operation of the switch 18. After the lapse of the timer time or when the operation of the switch is mistaken, the circuit 60 does not actuate and the correctable state is unlocked, thus the time correction is performed without providing any safety switch.