Citizen Watch Company, Ltd.

Tetsuya Yasuda

Yoshio Iinuma

Tomomi Murakami

Masaru Yoshida

Katsuo Nishimura

Minoru Natori

Satoshi Kimura

Yoshifumi Mochizuki

Masateru Yoshida

Yuzo Maekawa

Toshikiyo Kato

A liquid crystal display wrist watch is disclosed which comprises a supporting frame secured to a wrist watch substrate. The frame has two perpendicularly crossing supporting surfaces which cooperate with two corresponding reference sides of a liquid crystal cell to determine the position of exterior electrodes of the liquid crystal cell and segment electrodes of an electronic circuit. A holding frame plate is used for detachably urging the liquid crystal against the suppporting frame. A boundary plate and color filter are each sandwiched between a movement and a protective glass cover. A portion is provided for determining the position of the holding frame plate, with respect to either to the movement or an outer case.

Liquid crystal display wrist watch

A disk-shaped substrate supports on its front side a liquid-crystal cell bracketed by an upper and a lower glass plate and on its rear side an electric battery along with circuit elements for controlling the selective energization of various electrode leads of the cell to generate different digital symbols, the substrate being sandwiched between two flexible printed sheets whose conductors establish the necessary connections between the battery and the electrode leads of the cell. The connection between corresponding conductors of the two printed sheets is established by metal pins passing insulatedly through apertures in the substrate. A crystal oscillator included in the control circuit is enclosed in a sealed envelope which is received in a trough of the rear substrate face offset from a depression for the battery, the front substrate face being provided with a recess accommodating a chip connected in the wiring pattern of the printed sheet overlying that front face whose extremities are flexed around the lower glass plate to establish contact with conductor terminals carried on projecting marginal portions of the upper glass plate.

Electronic timepiece with electro-optical display

A switch mechanism for an electronic timepiece which makes use of an electro-optical display element. The switch mechanism serves to effect erasure, correction and the like of the display and comprises an exteriorly operated member provided in its axial direction with a plurality of stable positions and rotatable about its axis at the stable positions and provided in its rotating sense with stable positions. An erasing switch is provided for erasing the display at the stable positions when the exteriorly operated member is rotated at one of the stable positions in its axial direction. A correction switch corrects the display at the stable position when said exteriorly operated member is rotated at at least one other stable position in its axial direction.

Switch mechanism for electronic timepiece

Growing community of inventors

Tokyo, Japan

Tetsuya Yasuda