Abstract

Seiko Epson has developed the Direct Drive Cal. 5D as a new model of Kinetic series; its uniqueness is to enhance an interrelated communication with a user and a watch. Its characteristics are as follows: 1) A switching wheel accelerating rotating speed which synchronizes both automatic power generation and the manual power generation, which is newly developed. 2) A permanent power reserve system that has a power generation display function and then displays the amount of generated electronic power by manual power generation means. 3) An electronic charging load system that enables this model to display more accurate duration of operating compared to conventional rough calculation means.