| 摘要 |
An analog electronic watch comprising electronic circuitry is described, a first motor for driving hours and minutes hands, a second motor for driving a seconds hand, and a photoelectric sensor connected to the circuitry is described. The sensor reacts to strong ambient light by producing a first signal. In response to this signal the circuitry issues control signals to the two motors to activate them. If the light fades, the sensor produces a second signal and the circuitry then only issues control signals to the first motor. Stopping the second motor, when the light becomes too dim to read the time, saves energy. A memory circuit enables the seconds hand to be synchronized with the minutes hand whenever the ambient light becomes sufficiently strong to warrant activation of the second motor.
|
