Patent ID: 6646960
Filing Date: 2003-11-11
Classification: G04C,G04G

Abstract:
An electronic timepiece comprising:power generation means for generating electricity from external energy; storage means for storing the electric energy generated by said power generation means; time-indicating means for executing time display operation by use of the electric energy supplied from said power generation means or said storage means; a switching circuit comprising at least a plurality of switching devices, for executing transfer or interruption of the electric energy among said power generation means, said storage means, and said time-indicating means; voltage-measuring means for measuring a terminal voltage of said time-indicating means, being capable of deciding in which range the voltage is included among at least three levels of voltage ranges; and control means for controlling said switching circuit by determining a ratio of electric energy to be distributed between said storage means and said time-indicating means in a set period during charging of said storage means and said time-indicating means by said power generation means at any of at least three different ratios predetermined so that said ratios correspond to said at least three levels of voltage ranges one-to-one, according to a voltage range decided by said voltage-measuring means.