Rechargeable electronic watch and driving method of rechargeable electronic watch

Abstract

To extend the clock operation duration of a multi-functional rechargeable electronic watch, and to provide a rechargeable electronic watch that would not affect the feeling of use of said rechargeable electronic watch. A rechargeable electronic watch ( ) operating with an energy source comprising a power supply ( ) including a power generation means ( ) and a power storage means ( ) charged with electric energy from said power generation means ( ), said rechargeable electronic watch comprising a watch circuit ( ) for counting or operating hour information or function information or the like and outputting information, a display means ( ) for displaying hour information or function information or the like based on output signal from said watch circuit, a power generation magnitude detecting means ( ) for detecting the power generation volume of said power generation means ( ), and a control means ( ) for controlling the operation of said watch circuit ( ) according to said power generation magnitude, wherein said watch circuit ( ) is driven by at least one clock operation mode selected from a plurality of clock operation modes different in power consumption provided by said watch circuit ( ).