Patent ID: RE40370

Claim:
An electronic watch comprising: a power supply; an oscillator circuit; means for generating a drive pulse; a drive motor which drives a hand, in response to a drive pulse output from said drive pulse generating means; drive circuit means for controlling drive of said motor; means for controlling said drive circuit means; and means, connected to said drive circuit control means, for detecting a control condition in said drive circuit control means, said control condition detection means being provided with, a first non-proper condition detecting means for detecting a non-proper condition of said drive motor, which sense an occurrence of a condition in which proper drive of said drive motor is not possible under a prescribed condition, a first instructing means for instructing a change of a control mode which instructs said drive circuit control means to change the control mode that is currently being executed, in response to said detection signal output from said first non-proper condition detecting means, a second non-proper condition detecting means for detecting a non-proper condition of said drive motor, which sense an occurrence of a condition in which proper drive of said drive motor is not possible under a prescribed condition even after the control mode had been changed for a predetermined period, and a second instructing means for instructing a change of a control mode which instructs said drive circuit control means to change the currently executed control mode instructed by said second non-proper condition detecting means, to the original control mode when a non-proper condition of said drive motor has been detected within said predetermined period, which instructs said drive circuit control means to change the currently executed control mode instructed by said second non-proper condition detecting means, to further separate control mode when non-proper condition of said drive motor has been detected within said predetermined period.