Citizen Watch Company, Ltd.

Noritoshi Suzuki

Kenji Shimoda

Kenji Miyasaka

Shinichi Yamada

Kiyotaka Igarashi

Masao Sakuyama

Takashi Osa

Nobuyuki Uehara

Haruhiko Higuchi

Masahiro Sase

Akiyoshi Murakami

Tadashi Hanaoka

Igarashi Kiyotaka

Sase Masahiro

Hiroo Enomoto

An electronic watch with a meter function, capable of a multifunctional display, wherein the dial of the watch is divided into a data display region and a mode display region and the area for displaying the mode, and the area for displaying functional quantities are increased to make the graduations easier to read, with one hand indicating a data display region for data corresponding to physical quantities, and one hand indicating the mode region.

Electronic watch with meter function and display means

A multifunction electronic watch having a large variety of added functions, and providing an electronic watch and drive method therefor that have a high value as a product and a configuration enabling separate use of an energy-saving mode and a function information operating mode, this electronic watch having a reference signal generation means , a time information generation means , which generates time information TJ based on a reference signal S R from the reference signal generation means , a function information generation means for generating function information FJ, a display drive means , which outputs drive signals DRT and DRF for the purpose of displaying the function information FJ and the time information TJ on an appropriate display means, and a display means , which displays the function information FJ and the time information TJ based on the drive signals DRT and DRF from the display drive means , this electronic watch having an energy-saving operating condition with a power consumption that is less than an normal operating condition, wherein the function operating condition of the function information generation means is given priority over the energy-saving operating condition.

Electronic watch and drive method therefor

Small electric apparatus equipped with generator

In an electronic watch, a hand wheel gear 109b in a gear train has a tooth 124 having a profile K so as to prevent the backward movement of a hand 104. During initialization, the gear train is rotated backward such that the hand 104 is turned to the backward movement preventing position, which serves as an initializing position, and a reference position during detection of a hand position. Usually, a backward movement command is issued when the hand 104 is supposed to be at the reference position. The hand 104 is judged to be out of the reference position when its backward movement is detected.

Hand rotating mechanism for electronic watch

An electronic timepiece having functional hands includes indicating hands for indicating the time such as hours and minutes, a detection unit for detecting the information other than the time and an indicating part for indicating the information detected by the detection unit. The detection unit includes a first functional hand and a second functional hand for indicating mutually relevant information data.

Electronic timepiece having functional hands

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

Kawaguchi, Japan

Noritoshi Suzuki