Citizen Watch Company, Ltd.

Takashi Osa

Tomomi Murakami

Masahiro Sase

Noritoshi Suzuki

Tomio Okigami

Hitoshi Fujita

Yasuo Kamiyama

Hiroyuki Kihara

Kiyotaka Igarashi

Isao Kitazawa

Igarashi Kiyotaka

Sase Masahiro

Takeo Mutou

Hiroshi Fujioka

An electronic timepiece with a solar cell includes a timepiece movement, a timepiece case for housing the timepiece movement, a casing ring for housing and holding the timepiece movement in the timepiece case, a solar cell and a dial. The solar cell is disposed almost vertically to a solar cell positioning portion provided in the casing ring, and the solar cell has a slender strip shape formed on a flexible substrate. Consequently, the solar cell is not disposed in the timepiece movement, and it is only necessary to change the casing ring as an external component even when a panel cover diameter is changed. Further, a solar cell can be coiled to match the size of the casing ring when it is incorporated in the casing ring, so that a common solar cell can be used despite a change in the panel cover diameter of the timepiece.

Electronic timepiece with solar cell

An electronic device provided with a multilayer display panel ( ), in which during information display by any display panel layer ( or ) of the multilayer display panel ( ), display driving means ( ) maintains all the display segments of the other display panel layer ( or ) to be off, allowing simple display control.

Electronic device

Cardiotachometer

Watch with hands for multiple time displays

A world watch has an hour hand and a minute hand for usual time indication, a plurality of symbols disposed on a dial to represent areas having respective time differences, an area including hand for specifying one of the areas by indicating one of the symbols, a local time indicating hand for indicating the local time of the specified area at least in hours, and a date indicating hand for indicating a date of the specified area. The world watch comprises counters for counting the numbers of driving signals used for driving the area indicating hand and local time indicating hand, respectively; and a drive controlling circuit for generating, when the count of at least one of the counters reaches a predetermined value, a driving signal for driving the date indicating hand in a normal or reverse turning direction based on a judgment whether the predetermined value has been described by an increase in the count or by a decrease in the count. With this arrangement, the standard time and date of an optical area are correctly and easily displayed.

Analog world watch

Display device

Growing community of inventors

Tokyo, Japan

Takashi Osa