Importance

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Abstract

An electronic timepiece includes a secondary battery, a solar cell, a noncontact charging circuit, a control circuit, a time measurement section that measures time, a time display section that displays the time measured by the time measurement section, a biological information measurement circuit that measures information on a biological body to which the electronic timepiece is attached, and a power supply voltage detection circuit that detects voltage across the secondary battery, and the control circuit enables the biological information measurement circuit only when the voltage across the secondary battery is higher than or equal to first voltage whereas enabling the time measurement section and the time display section irrespective of the voltage across the secondary battery.

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First Claim