Citizen Watch Company, Ltd.

Yuzo Maekawa

Yoshio Iinuma

Fukuo Sekiya

Masaru Yoshida

Tetuya Yasuda

Toshikiyo Kato

Tetsuya Yasuda

An electronic timepiece having a rotatable operating member such as a crown, with switch and pulse generation means coupled to the operating member whereby a number of pulses can be produced each time the operating member is rotated, these pulses being used to modify time information displayed by the timepiece.

Electronic timepiece

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

An integrated circuit block assembly is provided with a base plate, a printed base carrying thereon a connecting and wiring pattern and a number of electrodes for connection with those on an integrated circuit chip, fine metallic wires, each being connected to one of the electrodes on said chip with one of said connecting electrodes on said printed base, an insulated protector for protecting said chip and said wires. In this assembly, the chip carries a large scale integrated circuit and the printed base is a flexible printed circuit sheet having a connecting pattern connected to a display means or other functional element.

Growing community of inventors

Fuchu, Japan

Yuzo Maekawa