Hirokazu Matsui
Hirokazu Matsui, Otsu-Shi JP
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20090052206 | Display Device - A wall-mounted display device, which uses a light guiding panel for an LED light source includes display body | 02-26-2009 |
20110103092 | LIGHT GUIDING PANEL ASSEMBLY FOR DISPLAY, SIGNBOARD, SURFACE ILLUMINATION OR THE LIKE - A light source receiver | 05-05-2011 |
20120092890 | Surface Light Source Assembly - A surface light source assembly is disclosed. The surface light source assembly includes a light guide plate, a reflective sheet, a light diffuser sheet and a transparent cover arranged in front of the light diffuser sheet, an insert-nut embedded in the light guide plate, and a supporting frame having a vertical plate and a screw movable hole arranged on the vertical plate. In the insert-nut, a screw is screwed from an end holding frame overlapped on both ends of the supporting frame and arranged in both ends of the light guide plate via the screw movable hole. The screw can be moved in the screw movable hole depending on a heat expansion and contraction of the light guide plate. | 04-19-2012 |
20130141941 | Large Area Light Source - A large area light source includes a narrow space of several millimeters long arranged between adjacent ends of circuit boards of LED bars that are arranged in series in their longitudinal direction, and one end or both ends of a connecting pin is attached movable in its longitudinal direction to a coupling terminal arranged on an end of the circuit board of the LED bar, the LED bar is attached movable in its longitudinal direction to its holder. Even if deformation of distortion, bending, or strain is induced by transportation, installation, or use of the area light source, the movable LED bar as well as the connecting pin absorbs expansion and contraction stress working between the adjacent ends of the circuit boards to securely prevent such breaking of wire incurred by use of a plurality of divided LED bars. | 06-06-2013 |
Hirokazu Matsui, Ibaraki-Ken JP
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20100148391 | Filament of polyglycolic acid resin and process for producing the same - A biodegradable filament of polyglycolic acid resin having practical properties represented by high tensile strength and knot strength is produced. A polyglycolic acid resin having a residual monomer content of below 0.5 wt. % is melt-spun, quenched in a liquid bath of at most 10° C. and then stretched in a liquid bath of 60-83° C. to produce a polyglycolic acid resin filament having a tensile strength of at least 750 MPa and a knot strength of at least 600 MPa. | 06-17-2010 |
Hirokazu Matsui, Tsukuba-Shi JP
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20090294729 | LIQUID-CRYSTALLINE POLYMER COMPOSITION CONTAINING NANOSTRUCTURED HOLLOW-CARBON MATERIAL AND MOLDED ARTICLE THEREOF - The present invention comprises a liquid-crystalline polymer composition comprising a nanostructured hollow-carbon material and a liquid-crystalline polymer. The nanostructured hollow-carbon material may comprises particles, each particle of which is selected from the group consisting of a particle which is composed of a carbon part and a hollow part and has a structure that the hollow part is entirely enclosed by the carbon part; and a particle which is composed of a carbon part and a hollow part and has a structure that the hollow part is partly enclosed by the carbon part. | 12-03-2009 |
20110210290 | LIQUID-CRYSTALLINE POLYMER COMPOSITION AND MOLDED ARTICLE THEREOF - The present invention provides a liquid-crystalline polymer composition comprising: | 09-01-2011 |
20110213086 | THERMOPLASTIC RESIN COMPOSITION AND MOLDED ARTICLE THEREOF - The present invention provides a thermoplastic resin composition comprising a polysulfone(A) having oxygen-containing groups selected from among hydroxyl groups and oxyanion groups, a fluororesin(B) and a thermoplastic resin (C) other than the polysulfone (A) and the fluororesin (B). The composition has high slidability. By molding the composition, a molded article with high slidability can be obtained. | 09-01-2011 |
20120235092 | LIQUID CRYSTAL POLYESTER RESIN COMPOSITION - An object is to provide a liquid crystal polyester resin composition capable of producing a molding in which the generation amount of particles is sufficiently reduced. | 09-20-2012 |
Hirokazu Matsui, Hitachiohta JP
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20090133947 | MOTOR CONTROL APPARATUS - An object of the present invention is to provide a motor control apparatus that can perform an abnormality diagnosis of current sensors and achieve cost reduction. When the outputs from three current sensors, which detect individual phase currents of a 3-phase AC current supplied from an inverter to a 3-phase AC motor, indicate that the sum of the individual phase currents of the 3-phase AC current is greater than a predetermined value, a sensor abnormality judgment unit of a motor control unit judges that one of the three current sensors is abnormal. The sensor abnormality judgment unit identifies an abnormal current sensor, which is one of the three current sensors, and performs calculations in accordance with the remaining two normal current sensors to output the current in the phase detected by the abnormal current sensor. | 05-28-2009 |
Hirokazu Matsui, Hitachiota JP
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20090059446 | AC Motor Controller - There is provided an AC motor controller capable of detecting an abnormal state of a motor cable while an AC motor is operating without using a special circuit but using a processor. | 03-05-2009 |
Hirokazu Matsui, Hitachiota-Shi JP
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20120001574 | Electric Power Conversion System and Electric Power Conversion Device - According to the present invention, an electrical power conversion system includes: a motor; an inverter circuit that outputs three-phase (U-phase, V-phase, W-phase) alternating currents to the motor; a current sensor that detects each of the three-phase alternating currents; and a control circuit that controls the inverter circuit based on a torque command value and values detected by the current sensor, so that the three-phase alternating currents outputted from the inverter circuit are formed as sine waves; and wherein the control circuit includes: a current component extraction unit that, based on the values detected by the current sensor, for each phase, extracts current components superimposed upon each of three-phase alternating currents; and an AC current abnormality detection unit that detects abnormality of an AC current flowing to the motor, based on the phases of the current components for any two phases among the three-phase alternating currents. | 01-05-2012 |
Hirokazu Matsui, Tokyo JP
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20140077525 | REAR STRUCTURE OF VEHICLE - A rear structure | 03-20-2014 |
Hirokazu Matsui, Hitachinaka JP
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20140217935 | Motor Control Device - A motor control device according to the invention includes: a mode setting section that sets one of a first mode in which a charge/discharge current of a secondary battery varies according to load fluctuation of a motor and a second mode in which the charge/discharge current of the secondary battery becomes constant for a predetermined time regardless of the load fluctuation of the motor; and a drive signal generating section that generates a drive signal for driving the motor on the basis of the mode that is set by the mode setting section, a torque command value, and a motor rotation speed. | 08-07-2014 |
Hirokazu Matsui, Hitachinaka-Shi JP
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20150214875 | Motor Control Device Provided with Motor Unit and Inverter Unit - Provided is a motor control device that detects a position error between a detection position, calculated from a rotation position sensor signal of a motor, and a position of a motor induced voltage and performs phase correction. A motor control device | 07-30-2015 |