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Masahiro Arai

Masahiro Arai, Yokohama-Shi JP

Patent application numberDescriptionPublished
20110106410CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE HAVING VARIABLE VALVE MECHANISM - In a control device for an internal combustion engine includes an intake valve, a variable valve mechanism capable of controlling a closing timing and an operating angle of the intake valve continuously and variably, a detection unit for detecting a possibility of pre-ignition, and a throttle for controlling an intake air amount such that when the possibility of pre-ignition is detected, the intake valve closing timing is retarded from bottom dead center by increasing the intake valve operating angle, the control device includes, an operating angle upper limit limiting value calculation unit that calculates an operating angle upper limit limiting value for limiting an upper limit value of the intake valve operating angle, and a throttle opening upper limit limiting value calculation unit that calculates a throttle opening upper limit limiting value for limiting an upper limit value of a throttle opening on the basis of the intake valve operating angle.05-05-2011

Patent applications by Masahiro Arai, Yokohama-Shi JP

Masahiro Arai, Osaka-Shi JP

Patent application numberDescriptionPublished
20100128070LIGHTING DEVICE FOR DISPLAY DEVICE AND DISPLAY DEVICE - A lighting device for a display device includes a light source and a chassis arranged to cover the light source. The light source includes a high voltage area to be subjected to relatively high voltage, and a low voltage area to be subjected to relatively low voltage. The chassis includes a distance providing mechanism arranged to provide a vertical distance between the chassis and the light source, so that the vertical distance is relatively large at the high voltage area of the light source and relatively small at the low voltage area of the light source.05-27-2010
20100149789LIGHTING DEVICE FOR DISPLAY DEVICE AND DISPLAY DEVICE - A lighting device for a display device includes a light source and a chassis arranged to cover the light source. The chassis includes one of a groove section and an opening section located directly below the light source. The one of a groove section and an opening section has a relatively small width at an area directly below a low voltage area of the light source, compared to at an area directly below a high voltage area of the light source.06-17-2010
20100156952LIGHTING DEVICE FOR DISPLAY DEVICE AND DISPLAY DEVICE - A lighting device for a display device includes a light source and a light source control device arranged to control the light source. The light source control device is arranged to generate a pulse signal as a light source control signal Vcon to control the light source. The light source control signal Vcon includes pulses, which individually have different shapes.06-24-2010
20100289420LIGHTING DEVICE AND DISPLAY DEVICE - A lighting device (11-18-2010
20110031892LIGHTING DEVICE AND DISPLAY DEVICE - A lighting device (02-10-2011

Masahiro Arai, Osaka JP

Patent application numberDescriptionPublished
20110007099INVERTER CIRCUIT, BACKLIGHT DEVICE AND DISPLAY DEVICE - Provided is an inverter circuit capable of suppressing an increase in EMI level. In at least one embodiment, the inverter circuit includes: a drive circuit for outputting a pulse signal; a transformer for outputting a drive signal corresponding to the pulse signal to a fluorescent lamp, the transformer including a secondary winding having one end connected to the fluorescent lamp; a detection control circuit for detecting a detection signal corresponding to the drive signal supplied to the fluorescent lamp; a wiring line connecting another end of the secondary winding of the transformer and the detection control circuit; and a wiring line provided together with the wiring line so that magnetic fields generated are cancelled out each other.01-13-2011

Masahiro Arai, Tsuchiura JP

Patent application numberDescriptionPublished
20100308301Semiconductor light-emitting device - A light-emitting diode has: a substrate; a light-emitting layer having a first conductivity type cladding layer, an active layer, and a second conductivity type cladding layer stacked sequentially on a front side of the substrate; a first current-blocking portion partially formed in the middle on the light-emitting layer; a current-conducting portion formed on the second conductivity type cladding layer and the first current-blocking portion; a lower electrode formed on the back side of the substrate, a light-reflecting layer formed between the substrate and the light-emitting layer; a partial electrode formed on the surface of the light-reflecting layer and in a portion positioned below the first current-blocking portion; and a second current-blocking portion formed over the surface of the light-reflecting layer excluding the portion in which is formed the partial electrode.12-09-2010

Masahiro Arai, Hitachi JP

Patent application numberDescriptionPublished
20090072257Light emitting device - An upper electrode is formed on one surface of a semiconductor multilayer structure including a light emitting layer. An interface electrode is formed at a region of another surface of the semiconductor multilayer structure except a region right under the upper electrode. A center of the interface electrode coincides with a center of the upper electrode. At least a part of the interface electrode has a similar shape to a shape of an outer periphery of the upper electrode. A current blocking layer is formed at another region of another surface of the semiconductor multilayer structure except the region where the interface electrode is formed. A reflecting layer for reflecting a part of the light emitted from the light emitting layer is electrically connected to the interface electrode. A conductive supporting substrate is electrically connected to the semiconductor multilayer structure.03-19-2009
20090206354Semiconductor light-emitting device - A semiconductor light-emitting device includes a support structure, and a light-emitting structure. The support structure includes a support substrate, and a support substrate side bonding layer disposed on one surface of the support substrate. The light-emitting structure includes a light-emitting structure side bonding layer bonded to the support substrate side bonding layer, a reflection region disposed on the support substrate side bonding layer opposite the support substrate, and a semiconductor multilayer structure including a light-emitting layer disposed on the reflection region opposite the light-emitting structure side bonding layer for emitting a light with a predetermined wavelength, and a light-extraction surface disposed on the light-emitting layer opposite the reflection region for reflecting diffusely the light. The reflection region includes a transparent layer of a material with a lower refractive index than that of the semiconductor multilayer structure, and a reflection layer of a metallic material. The transparent layer has such a thickness that interference caused by multiple reflection of light inputted to the transparent layer can be suppressed.08-20-2009
20100065869Light emitting device and method for fabricating the same - A light emitting device includes a semiconductor multilayer structure having a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, and an active layer. A reflecting layer is provided at a side of one surface of the semiconductor multilayer structure and reflects a light emitted from the active layer. A supporting substrate of Si or Ge is provided at an opposite side of the reflecting layer with respect to the side of the semiconductor multilayer structure and supports the semiconductor multilayer structure via a metal bonding layer. A back surface electrode is provided at an opposite side of the supporting substrate with respect to a side of the metal bonding layer and includes Au alloyed with the support substrate. A hardness of the back surface electrode is higher than a hardness of the Au.03-18-2010
20100065870Light emitting device - A light emitting device includes a semiconductor multilayer structure having a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type, and an active layer. A reflecting layer is provided at one surface of the semiconductor multilayer structure and reflects a light emitted from the active layer. A supporting substrate is provided at an opposite side of the reflecting layer with respect to a side of the semiconductor multilayer structure and supports the semiconductor multilayer structure via a metal bonding layer. An adhesion layer is provided at a surface of the supporting substrate at an opposite side with respect to a side of the metal bonding layer. A back surface electrode of an alloy contacts with a surface of the adhesion layer at an opposite side with respect to a surface contacting to the supporting substrate.03-18-2010
20100078659Light-emitting element - A light-emitting element includes a semiconductor laminated structure including a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type different from the first conductivity type and an active layer sandwiched by the first and second semiconductor layers, a first electrode on one surface side of the semiconductor laminated structure, a conductive reflective layer on an other surface side of the semiconductor laminated structure for reflecting light emitted from the active layer, a contact portion partially formed between the semiconductor laminated structure and the conductive reflective layer and being in ohmic contact with the semiconductor laminated structure, and a second electrode on a part of a surface of the conductive reflective layer on the semiconductor laminated structure without contacting the semiconductor laminated structure for feeding current to the contact portion.04-01-2010
20100207146Light emitting element - A light emitting element includes a semiconductor laminated structure including a first semiconductor layer of first conductivity type, a second semiconductor layer of second conductivity type different from the first conductivity type, and an active layer sandwiched between the first semiconductor layer and the second semiconductor layer, a surface electrode including a center electrode disposed on one surface of the semiconductor laminated structure and a thin wire electrode extending from a periphery of the center electrode, and a contact part disposed on a part of another surface of the semiconductor laminated structure extruding a part located directly below the surface electrode, in parallel along the thin wire electrode, and including a plurality of first regions forming the shortest current pathway between the thin wire electrode and a second region allowing the plural first regions to be connected. The surface electrode has an arrangement that the shortest current pathway between the center electrode and the contact part is longer than the shortest current pathway between the thin wire electrode and the first region, and the shortest current pathway between an end part of the thin wire electrode and the contact part is not shorter than the shortest current pathway between the thin wire electrode and the first region.08-19-2010

Patent applications by Masahiro Arai, Hitachi JP

Masahiro Arai, Minato-Ku JP

Patent application numberDescriptionPublished
20100054752OPTICAL MODULE - An optical module comprises: a photoelectric conversion device; at least one of a transmitter LSI and a receiver LSI; one or more memory devices; and an input/output terminal to read and write stored information within the memory device(s). The memory device(s) further comprises: a first memory region where a predetermined driving condition for the optical module or manufacturing information and other basic data inherent to the optical module, or a driving condition or its correction factor table is recorded before shipment as an optimum driving condition for the optical module when installed in a system; and a second memory region where history information such as accumulated use time is recorded after the shipment.03-04-2010

Masahiro Arai, Ota-Shi JP

Patent application numberDescriptionPublished
20100015378TRANSPARENT PLASTIC CONTAINER FOR ANTICOUNTERFEIT SYSTEM - A transparent plastic container which is transparent, allows good design and can be used for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.01-21-2010

Masahiro Arai, Mie JP

Patent application numberDescriptionPublished
20090316079BACKLIGHT DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR ASSEMBLING BACKLIGHT DEVICE - A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device 12-24-2009

Masahiro Arai, Kawasaki JP

Patent application numberDescriptionPublished
20090024792DISK ARRAY INCLUDING PLURAL EXCHANGEABLE MAGNETIC DISK UNIT - To provide a storage apparatus in which a plurality of drives in a unit are separately treated and the unit can be easily exchanged for another unit even when RAID groups are freely composed. The storage apparatus includes a plurality of drive cases in each of which a plurality of units are detachably mounted, each of the units including a plurality of drives that are detachably, and a controller case in which a disk control section is provided, wherein the disk control section comprises a RAID group creation section for creating a RAID group using the plurality of disks and an exchange indicating section for giving a notice that a unit is ready to exchange after rebuilding or copying of data in disks included in the unit at the time of exchange of the unit.01-22-2009
20090198888Disk Array System - Provided is a disk array system which is connected to a computer and which data is transmitted by the computer, including: a plurality of disk drives for storing user data transmitted by the computer; a cache memory for temporarily storing data sent/received among the computer and the plurality of disk drives; and a control unit for controlling input/output of the data to/from the cache memory, in which the control unit stores user data identification information that is capable of judging whether the user data is stored in a sector of the disk drive. The disk array system according to this invention allows the identification of user data of a disk drive.08-06-2009

Patent applications by Masahiro Arai, Kawasaki JP

Masahiro Arai, Machida JP

Patent application numberDescriptionPublished
20090083610Storage sub-system and method for controlling the same - The present invention provides means for effectively reducing the amount of data by means of de-duplication in a disk array apparatus having a data guarantee code.03-26-2009