Citizen Watch Company, Ltd.

Other

Citizen Holdings Company, Ltd.

Rhythm Watch Co., Ltd.

Japan Science and Technology Agency

Shigeru Morokawa

Fukuo Sekiya

Yasushi Nomura

Yukio Hashimoto

Keiichiro Koga

Takakazu Yano

Akira Tsuzuki

Ryoji Iwakura

Minoru Watanabe

Kazunari Kume

Munetaka Tamaru

Minoru Natori

Nobuyuki Hashimoto

Hideshi Ohno

Hiroo Fujita

Makoto Yoshida

Fuminori Suzuki

Masami Fukuda

Rikoku Nakamura

Yoshifumi Mochizuki

Hideshi Oono

Hiro Fujita

Hiroshi Ogawa

Kenji Matsumoto

Makoto Watanabe

Seigo Togashi

Seiichi Nakamura

Katsuo Nishimura

Takayasu Machida

Takaaki Nozaki

Yasuhiko Nishikubo

Kiyotaka Igarashi

Toshikazu Hatuse

Toshiaki Oguchi

Tadahiko Nakagiri

Yasushi Suzuki

Masayoshi Kikuchi

Akira Miyajima

Takashi Masuda

Tetuya Yasuda

Kazuo Sakamoto

Toshikazu Shimazaki

Hiroyuki Uematsu

Katsu Ito

Mikio Yamashita

Shinichi Komine

Yuzo Komatsu

Munehiro Shinabe

Kunihiro Daigo

Hideo Sato

Yukio Otaka

Ryuji Morita

Akira Nakai

Ryuichi Maruka

Yasuhiro Takaki

Takahiko Sato

Akira Suguru

An electric watch is characterized by including a transmitting circuitfor generating a plurality of transmitted signals, transmitting electrodesandfor outputting the output signals generated by the transmitting circuit, a signal modulating membercomposed of a rotor arranged adjacently to the transmitting electrodesandin a non-contact manner for modulating the transmitted signals, a receiving electrodearranged adjacently to the signal modulating memberin a non-contact manner for receiving the transmitted signals modulated by the signal modulating member, a receiving circuitfor amplifying received signals received by the receiving electrode, and a detecting circuitfor detecting mechanical position information of the signal modulating memberbased on the received signal amplified by the receiving circuit

Electric timepiece

To measure the concentration of an optically active substance in a solution without contacting the solution, the concentration measuring apparatus of the present invention includes: a light source for outputting linearly polarized light; a light intensity detecting element disposed opposite the light source with a sample placed therebetween; an optically active liquid crystal element placed between the light source and the light intensity detection circuit; a control circuit which controls the voltage to be applied to the optically active liquid crystal element so that an output value from the light intensity detecting element will in effect take an extreme value; and a concentration computing circuit for computing the concentration of an optically active substance in the sample, based on an output from the control circuit.

Concentration measuring instrument

A power supply circuit having a data driver power circuit, which has a temperature compensation function and a voltage regulation function, and a scan driver power circuit that has a function of controlling the brightness of the liquid crystal display device as a user desires. The data driver power circuit of the power supply circuit has a diode group and an electric current limiting resistor so that the data drive voltage is 3.6 V or so at room temperature.

Power supply circuit for driving liquid crystal display device

A time keeping device of an electric timepiece comprising one motor that can rotate in the forward direction and the reverse direction, a branch mechanism, and a plurality of wheel trains that are branched by the branch mechanism, wherein the motor is rotated in the forward direction to drive one wheel train thereby to carry out a mechanical display, and is rotated in the reverse direction to drive the other wheel train thereby to carry out another mechanical display. The time keeping device further comprises a merge mechanism in addition to the branch mechanism, and a plurality of wheel trains that are branched by the branch mechanism and are merged by the merge mechanism. The motor is rotated in the forward direction to drive one wheel train thereby to carry out a mechanical display, and is rotated in the reverse direction to drive the other wheel train thereby to carry out another mechanical display.

Timer of electric timepiece

An ultra-broadband, variable and multiple wavelength, waveform shaping apparatus is disclosed that excels with the ability to yield light pulses shaped in waveform, variable and multiple in wavelength over an ultra-broad bandwidth, the pulses being as short as in the order of pico-seconds or less, or even in the order of femto-seconds. The apparatus includes a light source ( ) for a light pulse, an ultra-broadband light pulse generating unit ( ) for producing from a light pulse, an ultra-broadband light pulse beam, a beam expander ( ) for spatially expanding the beam in one direction (along the y-axis) in its cross section, and a wavelength dispersive unit ( ) for dispersing wavelengths of light beam pulse while further spatially expanding the expanded beam along the x-axis, a two-dimensional spatial amplitude modulator ( ) for selecting wavelength bands varying in center frequency along the y-axis, a two-dimensional space phase amplifier ( ) for modulating a plurality of lights selected by wavelengths into different phases, and a beam reducing and waveform shaping unit ( ) for reducing so phase modulated light beam pulse components along the x-axis while shaping them into desired waveforms, whereby multiple wavelength light pulses are formed, which have center their wavelengths varying along the y-axis and waveforms shaped independently of each other and as desired.

Ultrabroad-band variable-wavelength wavelength-multiplexed pulse waveform shaping device

A bump of a semiconductor device is made up of an aluminum layer formed by sputtering. The height of the projecting terminal is sufficiently higher than those of the other parts, and the uppermost surface of the bump is covered with a conductive film preventing oxidation of films, such as a transparent conductive film.

Semiconductor device

A liquid crystal display apparatus includes a scan substrate, a data substrate, an animation display area formed by liquid crystal provided between the scan substrate and the data substrate, and a picture-character display area. The animation display area is driven and displayed with time-sharing in accordance with scan signals which are applied to scan electrodes formed on the scan substrate and output from the scan circuit, and data signals which are applied to data electrodes formed on the data substrate and output from the data circuit. The picture-character area is driven and displayed in accordance with data signals which are applied to data picture-character electrodes formed on the data substrate and output from the data circuit, and data signals which are applied to scan picture-character electrodes formed on the scan substrate and output from the data circuit.

Liquid crystal display apparatus

In an electronic timepiece, in which electric power generated by a solar cell (,) is accumulated in an accumulator device (,) and a time keeping means (,) is driven with the accumulated electric power, an electrically on-off controllable switch (,) is provided in a circuit for charging the accumulator device (,) by the solar cell (,), a voltage comparison means (,) intermittently brings the switch (,) into the off-state at predetermined intervals and compares the generated voltage (Vs) by the solar cell and the accumulated voltage (Vb) in the accumulator device (,), and keeps the switch (,) in the off-state as it is when Vs&lE;Vb and brings the switch (,) into the on-state when Vs>Vb in accordance with the comparison result. Thereby, a reverse flow of an electric current from the accumulator device (,) can be prevented and a voltage drop on charging is eliminated, resulting in enhancement in charging efficiency.

Electronic timepiece

An LCD device comprising an LCD for changing the size of a displayed unit of pixels by electrically connecting a plurality of display electrodes in parallel with one another for time-sharing matrix driving liquid crystal pixels arranged as a matrix wherein image data is independently inputted into upper and lower half portions of the LCD, a display controller for outputting upper and lower side image data to be displayed on the upper and lower half portions of the LCD and synchronous signals. The LCD device further comprises an upper side image data-holding memory and a lower side image data-holding memory for dividing image data in a given display area from a screenful of image data outputted from the display controller into new upper and lower side image data to be written and held in the upper and lower side image data-holding memories. The upper and lower side image data held in the upper and lower side memories are read out to be repeatedly displayed on the upper and lower half portions of the LCD. As a result, the image from any desired display area of a full-screen area can be enlargedly displayed on a full-screen area of a display with high quality and be easily visible without being discontinuous.

Liquid crystal display device

A liquid crystal active lens having, in combination, a fixed-focal-point lens having a high index of refraction and a phase modulation element comprising two-dimensionally arranged fine pixels, and having power and being capable of electrically controlling the lens characteristics as a function of space. An electrically controlled optical system can be realized without having a moving portion. Owing to the combination of the liquid crystal element for modulating space phase and the high-power lens of a fixed focal length, it is possible to electronically control the focal length and to electronically control the lens in a spatially split manner.

Optical device containing a liquid crystal element for changing optical

A precision liquid crystal spatial optical modulator device capable of being controlled by electric signals is realized using fine structure electrodes below a thickness of a liquid crystal layer, bringing adjacent electrodes close to one another, and driving them interconnectedly so as to spatially and finely control both liquid crystal molecule layers oriented immediately below the driving electrodes and immediately below the electrode gaps. A fine structure optical diffraction grating capable of electronic control which improves pattern positional accuracy of a liquid crystal optical modulator devices, reduces a pattern formation error and improves an aperture ratio of the liquid crystal modulator device can realized.

Liquid crystal optical modulator device with each electrode width

A display drive circuit including a pulse generator means; a variable voltage source circuit including a first voltage source line (VD.sub.t) with a variable potential, a second voltage source line (VS.sub.t) with a potential different from the first voltage source line by a constant value, having a voltage waveform, a variation period and a variation component the same as the first voltage source line, and varying in potential with a potential level not more than the lowest potential level of the first voltage source line, and other voltage source lines with constant potential levels between the potentials of the first and second voltage source lines; and an integrated circuit having an electronic switch which switches at a constant period the connection of the voltage source lines so as to make a plurality of constant waveform voltages, outputting these to a plurality of output terminals at constant phase difference.

Multi-level voltage generator to drive LCD

A selecting electrode drive circuit is capable of providing drive pulses of twice as high having an amplitude twice as large as the breakdown voltage of semiconductor devices used in the circuit. The drive pulses thus provided are applied to selecting electrodes of a matrix type display device and the driving circuit includes a pulse generator for generating a train of reference pulses, a power supply connected to the pulse generator for level-shifting the reference pulses by the crest value of the power supply and a switching circuit is powered by the power supply.

Selecting electrode drive circuit for a matrix liquid crystal display

Disclosed is a matrix type liquid crystal display device comprising a column-and-line arrangement of pixels and a grating pattern which masks the spaces between adjacent pixels, thereby improving the contrast of the whole matrix display.

Liquid crystal display having opaque portions on the electrodes

A drive method for a liquid crystal matrix display panel whereby the display is driven as two or more separate regions, with each region being successively driven by row and column drive signals to display video data in a row-by-row manner during a drive phase while the remaining regions operate in a rest phase in which a potential substantially equal to zero is applied across the display elements of these other regions. The effective number of row electrodes to which sequential scanning signal pulses are applied, which determines the level of contrast obtainable with such a display panel when the number of display elements is large, is made equal to the number of row electrodes of each of these regions, so that a sufficiently high number of elements for high-resolution television display is attainable with a simple display panel and peripheral circuit configuration.

Method of driving liquid crystal matrix display

Growing community of inventors

Higashiyamato, Japan

Shigeru Morokawa