Seiko Epson Corporation

Kabushiki Kaisha Suwa Seikosha

Masuo Tsuji

Tatsuya Shimoda

Satoshi Nebashi

Noriyuki Kamijo

Hiroaki Nomura

Izuhiko Nishimura

Yasuhiro Oguchi

Yasuhisa Hirabayashi

Masaaki Abe

Kensuke Torii

Yasuhide Fujiwara

Minoru Fujimori

A semiconductor device for supplying a signal to an electro-optical device which displays a two-dimensional image, includes first terminals which are formed along a first side of the semiconductor device in a longitudinal direction and have a length L in a direction intersecting the longitudinal direction at right angles; and second terminals which are formed along a second side intersecting the first side at right angles and have a length L which is greater than the length L in the longitudinal direction.

Semiconductor device and electro-optical device including the same

Semiconductor device

Information storage medium, method of fabricating same, and drive unit

The integrated circuit, including MOS transistors, for driving the step motor of an analog display is substantially reduced in size by boosting the transistor gate voltage above the battery voltage applied to the source-drain terminals.

Integrated circuit for timepiece

An electronic timepiece having detecting and control circuitry for preventing a digital display from being driven by a DC energizing signal is provided. The detecting and controlling circuitry is coupled intermediate the decoder circuitry and driving circuitry in an electronic timepiece digital display arrangement and detects the presence or absence of an intermediate frequency signal being produced by the timekeeping circuitry and applied to the driver circuitry to effect AC driving of the digital display. In response to detecting the absence of an intermediate frequency signal applied to the driver circuitry, the detecting and controlling circuit prevents the decoder circuitry from applying to the driver circuitry decoded timekeeping signals for effecting driving of the digital display, and thereby prevents inadvertent DC driving of the digital display.

Electronic timepiece digital display drive circuit

An electronic digital display timepiece having a locking switch to prevent inadvertent correction of the timepiece, the locking switch being adapted to effect setting of at least one of the digits of time displayed. The electronic timepiece includes a quartz crystal oscillator circuit for producing high frequency time standard signals and a divider circuit including a plurality of divider stages adapted to produce low frequency timekeeping signals in response to said high frequency time standard signals. A display is associated with each of the plurality of divider stages in order to display digits of time in response to the low frequency timekeeping signals counted thereby. The count of certain of the divider stages may be corrected by correction switches provided a locking switch is first displaced from a locking mode to release mode. The locking switch is coupled to at least one divider stage not having a correction switch coupled thereto through circuitry effecting a setting of the divider stage by the operation of said locking switch.

Electronic digital display timepiece correction device

Growing community of inventors

Suwa, Japan

Masuo Tsuji