Citizen Watch Company, Ltd.

Masakazu Ichikawa

Tomomi Murakami

Isao Kitazawa

Haruhiko Higuchi

Hiroyuki Kihara

Masao Sakuyama

Hidetaka Tsuchiya

Tomio Okigami

Norio Miyauchi

The power generated by a power generating means () of a power-generating type electronic clock is measured by a first power generating sensing means () and a second power generating sensing means (). The power generation level required when the operation is changed from a normal mode to a power-saving mode and the power generation level required when the operation is changed from the power-saving mode back to the normal mode are made different to prevent the phenomenon that the operation changes frequently by imparting hysteresis characteristics to the power generation level which causes a change in the mode, thereby improving the power-saving effect.

Power generating type electronic timepiece

A first voltage detector detects whether the voltage of a secondary cell has reached to 1.2V and a first timer counts a time duration for which the voltage is equal to or above 1.2V. If the time counted by the first timer reaches one hour, a second timer starts counting time for one hour. An amount of charge accumulated in the secondary cell is displays after counting of the one hour by the second timer is over. As a result, an accurate display of the amount of charge accumulated in the secondary cell can be achieved.

Electronic timepiece, information processing device, method of displaying charged condition of secondary cell, and computer product

Motor driving apparatus

Electronic timepiece

Growing community of inventors

Souka, Japan

Masakazu Ichikawa