Sony Corporation

Ricoh Company, Ltd.

Kabushiki Kaisha Pilot Corporation

Tokai Kogyo Kabushiki Kaisha

Iwaki Glass Co., Ltd.

Setoseido Kabushiki Kaisha

Takao Yamaguchi

Kazumasa Aoki

Yoshimi Ohno

Daisuke Hata

Takayuki Hatase

Susumu Iguchi

Osamu Saito

Takayoshi Chiba

Masahiko Ikeda

Morio Sato

Teruaki Nojima

Hiroshi Tazaki

Sadao Tokorozawa

Ryoziro Taniguchi

Yutaka Abe Kanagawa

An objective of the present invention is to provide a magnetic display panel capable of writing on both face and rear surfaces. A magnetic display panel, comprising a face substrate, a rear substrate, cell walls for forming a cell, for binding the face substrate and the rear substrate and for enclosing a dispersion liquid including a magnetic particle, wherein the cell walls having U-shaped cross sections are formed by bending and standing partially one or both of the face substrate and the rear substrate to almost 90 degrees, wherein a clearance of the U-shaped cross sections in each cell wall has an open angle of 0 to 20 degrees, wherein a base portion clearance of the U-shaped cross section is 0.1 mm to 1.0 mm, and wherein a top portion clearance of the U-shaped cross section is 0 to 1.0 mm.

Magnetic display panel

A driving power unit for a liquid crystal display element, which charges an electrostatic charge on the surface of the liquid crystal display element having at least a conductive layer and a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed into a polymer matrix, has a blocking oscillator circuit for boosting a low voltage generated by a low-voltage DC power source, a rectifier diode for rectifying the voltage boosted by the blocking oscillator circuit, a smoothing capacitor for being charged by application of the rectified voltage and smoothing an output voltage, and a resistance interconnected between the smoothing capacitor and an output terminal to control an output current value to 5 mA or less. A liquid crystal light-modulating device has a driving power unit and a liquid crystal light-modulating panel including a pair of electrodes at least one of which is transparent or translucent, and a liquid crystal-dispersed polymer layer sandwiched between the electrodes.

Driving power unit for driving liquid crystal display element and liquid

A device for driving the disk-type recording medium, such as a magnetooptical disk, has a read and write system for reading data from and writing data on the disk-type recording medium. The read and write system is self-diagnosed by generating time data which vary with time after the device is turned on, and detecting when the disk-type recording medium is loaded into the device, generating test data depending on the time data at the time the disk-type recording medium is loaded as detected, writing the test data in a predetermined area on the disk-type recording medium with the read and write system, reading the written test data from the predetermined area on the disk-type recording medium with the read and write system, and determining whether the test data read from the disk-type recording medium agree with the generated test data.

Disk-type recording medium drive and method of self-diagnosing disk-type

A disc recording and/or reproducing apparatus for recording and/or reproducing information signals on or from an optical disc on which there is formed a spirally extending recording track is disclosed. The apparatus includes fundamental clock generating circuits for generating fundamental clocks CK.sub.A and CK.sub.B having different frequencies associated with recording regions E.sub.A and E.sub.B of different recording densities formed on the optical disc, and a clock changeover circuit for making a changeover between the fundamental clocks CK.sub.A and CK.sub.B from the fundamental clock generating circuits based on the boundary position information between the recording regions E.sub.A and E.sub.B. During transition from a first recording region of a first recording density to a second recording region of a second recording density, the clocks from the clock generating circuit are changed over instantly to the fundamental clock associated with the second recording region to enable plural recording regions with different recording densities to be processed continuously.

Disc recording and/or reproducing apparatus for permitting continuous

The present invention relates to a process of using shirasu balloon powder as a material to manufacture pottery products where; white pottery products of light weight, highly white coloring, uniformly distributed density and satisfactory strength can be obtained by removing impurities such as iron from the shirasu balloon powder and diffusing the shirasu balloon powder uniformly in the body and reinforcement agent, or non-white pottery products of light weight, uniformly distributed density and satisfactory strength can be obtained by diffusing the shirasu balloon powder uniformly in the body and reinforcement agent without removing impurities such as iron from the shirasu balloon powder.

Method for preparing pottery products containing shirasu balloons

An automatic focusing control system includes a focus detecting light detector, a rangefinder, a lens driver, a manual range setting unit, a mode setting unit, and a control unit. When a manual mode is selected by the mode setting unit, the control unit applies a lens driving signal from the manual range setting unit to the lens driver unit to drive a lens. When an automatic mode is selected by the mode setting unit, the control unit operates the lens driver unit to drive the lens based on a measured distance at the time distance measurement is possible, applies the lens driving signal from the manual range setting unit to the lens driver unit at the time distance measurement is impossible, and operates the lens driver unit to drive the lens based on the measured distance at the time distance measurement becomes possible from a condition in which distance measurement is impossible.

Automatic focusing control system

An image signal amplifier circuit includes an amplifier for amplifying an image signal from a focusdetecting self-scanned image sensor, and a monitor photodetector for detecting the brightness of an object to be photographed. The amplification degree of the image signal is controlled by an automatic gain controller in the amplifier based on an output signal from the monitor photodetector so that the image signal as amplified will be of a constant level. An offset voltage is added to an output signal from the amplifier.

Focus detecting device and image signal amplifier circuit therefor

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Kanagawa, Japan

Takao Yamaguchi