Electronic timepiece

An electronic timepiece is operated with a power-supply voltage from a secondary battery charged with a voltage from a solar panel. An oscillation circuit generates and supplies a clock signal to a CPU when the voltage charged to the battery is lower than a first voltage. A reset circuit resets the...

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Bibliographic Details
Main Authors TAKAKURA AKIRA, KATO KAZUO, HASEGAWA TAKANORI, FUKUSHIMA TOSHITAKA, IHASHI TOMOHIRO
Format Patent
LanguageEnglish
Published 19.05.2015
Subjects
ELECTRONIC TIME-PIECES
HOROLOGY
PHYSICS
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Summary:An electronic timepiece is operated with a power-supply voltage from a secondary battery charged with a voltage from a solar panel. An oscillation circuit generates and supplies a clock signal to a CPU when the voltage charged to the battery is lower than a first voltage. A reset circuit resets the CPU when the voltage charged to the battery does not exceed a second voltage higher than the first voltage, and cancels the reset of the CPU when the voltage charged to the second battery exceeds the second voltage. The CPU starts an operation when the voltage charged to the secondary battery exceeds the second voltage and the reset is cancelled, and performs a time-of-day display on a display unit when the voltage charged to the secondary battery is equal to or higher than a third voltage higher than the second voltage.
Bibliography:Application Number: US201313738059