Mitsubishi Denki Kabushiki Kaisha

Rohm Co., Ltd.

Mitsubishi Electric Corporation

Eiji Yokoyama

Masato Nagasawa

Hiroaki Hayashi

Takumi Yamade

Kazuo Mori

Masami Tomita

Nobuzumi Kurihara

Seiji Kishikawa

Nobuo Takeshita

Tomoaki Ryu

Masaharu Ogawa

Kuniko Kojima

Muneharu Kuwata

Tomohiro Sasagawa

Takaya Nagahata

Keiji Nakamura

Atsushi Michimori

Tetsuya Kimura

Satoru Okagaki

Yasuhiro Yoshikawa

Masahisa Shinoda

Shinobu Obata

Teruhisa Sako

Kenjiro Kime

Yuzo Nakano

Norihiro Watanabe

Kouichi Komawaki

Jun Kondo

Keigo Nakamura

Kimihide Nakatsu

Naoya Tanaka

Kazuhide Kodeki

Osamu Takahara

Mitsuhiro Yamazumi

Hideaki Kobachi

Yasushi Otsuka

Toshiharu Miyago

Takeshi Utakouji

Masaaki Ogata

Yuji Kanagawa

Masanori Kawamura

A reaction compensation device includes a drive mechanism driving a first movable part with respect to a base, a reaction mass drive mechanism driving a second movable part with respect to the base; and a first relative position sensor measuring a relative position between the first movable part and the base. There is also a second relative position sensor measuring a relative position between the second movable part and the base, a first control system controlling the drive mechanism by taking in a signal outputted from the first relative position sensor as a feedback signal in response to a command value, and a second control system correcting the command value using a correction parameter for adjusting a difference between mass properties of the drive mechanism and reaction mass drive mechanism and for controlling the reaction mass drive mechanism.

Reaction compensation device and fast steering mirror system

Provided is an electric motor control device including: a speed controller configured to calculate an operation amount directed to an electric motor, and output the operation amount; a first filter configured to use the operation amount as an input to calculate a first correction amount in accordance with a first transfer function from the operation amount to the first correction amount, and output the first correction amount; a second filter configured to use a rotational speed as an input to calculate a second correction amount in accordance with the second transfer function from the rotational speed to the second correction amount, and output the second correction amount; and a control command calculator configured to add the first correction amount and the second correction amount to one another, to thereby calculate a control command, and output the control command.

Electric motor control device

A projection optical instrument includes a light source unit, a projection optical member and a support part. The light source unit emits light. The projection optical member transforms the light emitted from the light source unit into projection light. The support part supports the projection optical member to be movable with respect to the light source unit in at least one direction orthogonal to an optical axis direction of the light source unit. When vibration is applied to at least one of the light source unit and the projection optical member, the projection optical member accordingly vibrates with respect to the light source unit in a direction orthogonal to the optical axis direction of the light source unit.

Projection optical instrument and headlight device

A screen includes a light diffusion layer in which microcapsules, each having therein a light diffusion liquid that scatters light for displaying a video image, are planarly arranged. The light diffusion layer is fixed to a supporting sheet by a binder material. On a surface of the supporting sheet, a Fresnel lens is formed. A light diffusion plate is made up of the light diffusion layer and the supporting sheet. The screen is made up of the light diffusion plate and a light diffusion plate. Scattering distribution of a scattered wave of light that passes through the light diffusion layer temporally changes.

Optical element, screen, and display device

As a measure against vibration caused by disturbance due to mass eccentricity of a disc, a conventional disc device has a means to add an auxiliary mass that passively operates. This method has no way to enhance vibration damping effect other than setting the auxiliary mass to be large, and therefore there is a problem that the device becomes large. An auxiliary massis actively driven by an auxiliary mass driving portion. The driving of the auxiliary massis performed by amplifying a signal corresponding to a force transmitted from a main frame portionto the auxiliary mass. This achieves a vibration damping effect using the small auxiliary massto the same degree as that where the large auxiliary mass is mounted.

Vibration damping device and disc device having vibration damping device

Means () for evaluating positional control deviation and means () for outputting a corrective signal, this being a set of signals with kick and brake functions, to an actuator () on the basis of the evaluation result are provided. Although control deviation may increase due to external shock or vibration acting on the disc device or when a disc having eccentricity, wobble, or another physical deformity is reproduced, the control deviation is suppressed without loss of control stability, and stable recording and reproducing is always possible.

Optical disc device

The present invention provides a control system of following a follow target position. A control system has a disturbance observer for obtaining a disturbance force estimation value and a speed estimation value as estimation values of a disturbance force and a speed as a speed to be controlled by using an actuator control signal cont and a zero follow position which can be observed. Since the disturbance force estimation value and speed estimation value are fed back.

Position control method

A disk physical strain correction signal generator outputs a signal obtained by allowing a phase compensation signal to pass a LPF as a disk physical strain correction signal during a normal period. During a defect detection period, it outputs the output signal of the LPF sampled at the time of the defect detection start as the disk physical strain correction signal. A disturbance pulse correction signal is output based upon a disturbance pulse obtained by subtracting the disk physical strain correction signal from the phase compensation signal. The disk physical strain correction signal and the disturbance pulse correction signal are added to output a defect compensation signal. This defect compensation signal is applied as an actuator control signal during the defect detection period. Thus, it is possible to provide an optical disk device which can carry out a stable driving control for a reproducing operation, etc. without losing the continuity of control before and after the defect detection even when the defect detection period is long.

Optical disk device for data defect detection and use

An image sensor according to the present invention includes a casing ( ), a light source disposed in the casing ( ) for emitting light toward an object (K) to be read, and an image sensor board ( ) provided, on an obverse surface thereof, with a plurality of light receiving elements ( ) for generating image signals upon receiving light reflected by the object (K). The image sensor board ( ) is disposed so that the obverse surface thereof is directed inwardly of the casing ( ). The substrate ( ) is provided with a light shielding layer ( ) for covering the reverse surface of the substrate at least entirely over a portion of the obverse surface where the plurality of light receiving elements ( ) are mounted, so that disturbing external light is prevented from entering inside the casing ( ).

Image sensor substrate and image sensor employing it

A circuit board ( ) is provided upon which a predetermined number of semiconductor elements ( ), including at least a field-effect transistor for charge and discharge, are mounted. A predetermined number of passive elements ( ) are also mounted onto the circuit board. The semiconductor elements ( ) are mounted facedown as bare chips on the circuit board ( ).

Protection circuit module for rechargeable battery and method of making the same

A photocoupler includes a signal relay unit, a voltage regulation unit and a signal amplification unit. The signal relay unit transmits an optical signal from the primary side to the secondary side. The voltage regulation unit applies only a safe voltage to the signal relay unit. The voltage regulation unit has a greater withstand voltage than the signal relay unit has. The signal amplification unit amplifies signals sent from the signal relay unit. The withstand voltage of the signal amplification unit is also greater than that of the signal relay unit.

Optical interface with low-voltage relay unit and high-voltage regulation unit

The thermal printhead ( ) includes an insulating substrate ( ), a heating resister ( ) formed on the substrate ( ), a first glass coat layer ( ) formed on the substrate ( ) for covering the heating resister ( ), and a second glass coat layer ( ) formed on the first glass coat layer ( ). The heating resister ( ) has a centerline average roughness not greater than 0.3 &mgr;m. The first glass coat layer ( ) has a centerline average roughness not greater than 0.1 &mgr;m.

Thick-film thermal print head and its manufacturing method

A thermal printhead includes a head substrate ( ), a heating resistor ( ) provided on the head substrate, a plurality of individual electrodes ( ) connected to the heating resistor, and a common electrode ( ) connected to the heating resistor. The thermal printhead is further provided with a first coating layer ( ) covering the heating resistor, the individual electrodes and the common electrode, and a second coating layer ( ) which is formed on the first coating layer and made of sialon containing a conductive material as an additive. The first coating layer is formed with at least one through-hole ( ) or notch ( &prime;), so that the second coating layer is electrically connected to the common electrode via the through-hole or the notch.

Construction of thermal print head and method of forming protective coating

A thick-film thermal printhead comprises: an oblong rectangular substrate ( ) having at least one longitudinal edge ( ); a partial glaze layer provided on the substrate along the longitudinal edge; a linear heating resistor ( ) formed on the partial glaze layer; a common electrode ( ) formed on the substrate and electrically connected to the heating resistor; and a plurality of individual electrode ( ) formed on the substrate and electrically connected to the heating resistor. The common electrode includes a plurality of comb-like teeth ( A). Each of the comb-like teeth includes a tip portion ( ) having a smaller width and a base portion ( ) having a larger width. Each of the individual electrodes includes a tip portion ( ) having a smaller width and an intermediate portion ( ) having a larger width.

Thick-film thermal printhead

A thermal printhead,according to the present invention includes a multiplicity of heating elements,formed in a row on an obverse surface of an elongated substrate,at a portion which is offset widthwise toward one longitudinal side of the substrate, and a protective film,formed on the obverse surface of the substrate,at the widthwise offset portion for covering the heating elements,The protective film,is formed to extend on the obverse surface of the substrate,continuously from the widthwise offset portion onto one longitudinal side surface,of the substrate. A longitudinal edge,of the protective film,directed toward the other longitudinal side of the substrate,is tapered.

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Kyoto, Japan

Eiji Yokoyama