Citizen Watch Company, Ltd.

Masao Mafune

Yasuo Kamiyama

Tomomi Murakami

Kenji Fujita

Masahiro Sase

Yoichi Nagata

Yuichi Kamei

Isao Yabe

Minoru Fukuda

Masami Fukuda

Hidetaka Tsuchiya

Nobuyuki Uehara

Yoshio Katsuki

Osamu Kamisawa

Masaru Koyanagi

Takashi Odaka

Hiroki Nomura

A display includes a plurality of display arrays, such as a time display section ( ), a chronological display section ( ), and a chronological split display section ( ). An upper or lower polarizer is provided with a light modulating section having a reflection type polarizer. To display only the time, the chronological display section ( ) and the chronological split display section ( ) are shielded by the light modulating section. For chronological display, the chronological display section ( ) is lit, and the chronological split display ( ) is displayed or shielded as required by a shutter function.

Electronic device with display section

An electronic timepiece is formed of a power generating device for generating power, a control device for driving on receipt of a power supply from the power generating device, a display device for displaying a time by an operation of the control device, a detecting device for detecting a state of the power generating device, and a deciding device for deciding whether or not the power generating device generates power based on a detection signal sent from the detecting device. The control device controls such that a power generating state of the power generating device is displayed on the display device based on a decision of the deciding device. It is possible to reduce power consumption by stopping hands if required.

Electronic timepiece having power generating function

An electronic watch is formed of a case body having a display window, a movement situated in the case body, a light transmitting digital display disposed above the movement in the case body to be observed from an outside through the display window, and a solar cell unit. The solar cell unit is interposed between a part of the light transmitting digital display and the movement, and a reflecting plate is disposed under another part of the light transmitting digital display adjacent to the solar cell unit. Also, a light transmitting material is interposed between the part of the light transmitting digital display and the solar cell unit. Thus, light is supplied to the solar cell unit from the outside through the light transmitting digital display.

Electronic watch equipped with solar cell

Display unit structure for electronic device

A watch with a dumb alarm has a time drive region which is electrically drivable and an alarm drive region which is drivable by a mechanical drive source. The alarm drive region has an alarm wheel engaging the hour wheel, an eccentric weight rotatably supported in an eccentric position, an alarm lever for urging the hour wheel toward the alarm wheel, the alarm lever having a distal end engageable with an engaging portion on the eccentric weight, an externally operable member for controlling the eccentric weight to start and stop operating, a spiral spring for rotating the eccentric weight, and a wheel train for transmitting drive forces from the spiral spring. When a preset time to be announced comes, the hour wheel engages the alarm wheel to allow the eccentric weight to start operating, and power of the spiral spring is transmitted through the wheel train to the eccentric weight to rotate the eccentric weight to produce vibrations thereof.

Watch with dumb alarm

A molded part formed by outsert-molding a resin into a through hole of a pipe part includes a pipe part and a resin part. The pipe part includes a hole having a tapered surface whose size is gradually reduced inward from an end portion of a through hole formed in an outsert-molded part such as a metal part, and a resin part has an outer shape matching the tapered surface. The resin part is formed in the pipe part by outsert molding.

Molded part and mold for manufacturing the same

A wrist watch with hour and minute hands in the form of rotatable circular films, having an electrostatic shielding device which grounds a glass of the watch through a back cover of the watch, to eliminate static electricity produced in the glass. Also, because of the use of thin rotatable circular films for the minute and hour hands, the thickness of the watch can be considerably reduced.

Watch with hand in form of circular film and provided with electrostatic

A method of boring a hole through a magnet made of an intermetallic compound, characterized in that the hole is formed by a laser machining. The magnet may be reinforced by impregnation with a nonmagnetic material such as a high polymeric substance or a metal having a low melting point before the hole is bored through the magnet by laser machining.

Growing community of inventors

Kawagoe, Japan

Masao Mafune