Patents by Inventor Hiroaki Maehara
Hiroaki Maehara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11688937Abstract: An antenna device includes: multiple H-bridge circuits each of which including a first switch set and a second switch set connected in parallel with one another; a single connection antenna element connected between a point disposed between the two switching elements of the first switch set included in one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in the one H-bridge circuit; and a multiple connection antenna element connected between a point disposed between the two switching elements of the first switch set included in the one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in a different H-bridge circuit.Type: GrantFiled: September 24, 2021Date of Patent: June 27, 2023Assignee: DENSO CORPORATIONInventors: Takashi Saitou, Hiroaki Maehara
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Patent number: 11256248Abstract: A reception range varying system includes a vehicle control device and a portable device. The reception range varying system determines whether a position where the portable device exists is within an execution range which enables execution of vehicle control over the portable device, or within a reception range but outside the execution range, and narrows the reception range so that the portable device is positioned outside the reception range while maintaining the reception range at a size equivalent to or larger than the execution range, on the basis that the position where the portable device exists is within the reception range but outside the execution range.Type: GrantFiled: November 26, 2019Date of Patent: February 22, 2022Assignee: DENSO CORPORATIONInventors: Hiroaki Maehara, Ryusuke Ishikawa, Takayuki Hattori, Tetsuya Miwa, Tatsuhito Yoshida
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Publication number: 20220013898Abstract: An antenna device includes: multiple H-bridge circuits each of which including a first switch set and a second switch set connected in parallel with one another; a single connection antenna element connected between a point disposed between the two switching elements of the first switch set included in one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in the one H-bridge circuit; and a multiple connection antenna element connected between a point disposed between the two switching elements of the first switch set included in the one H-bridge circuit and a point disposed between the two switching elements of the second switch set included in a different H-bridge circuit.Type: ApplicationFiled: September 24, 2021Publication date: January 13, 2022Inventors: Takashi SAITOU, Hiroaki MAEHARA
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Publication number: 20210344172Abstract: There is provided a configuration which includes: a burying layer which has a current narrowing window where portions protruding onto a top part of a ridge stripe are opposed to each other with an interval therebetween narrower than a width of the top part; and a diffraction grating in which a ?/4 phase shifter is placed at an intermediate portion in a light traveling direction; wherein a sectional shape of the current narrowing window varies depending on a position in the light traveling direction so that, at a region where the ?/4 phase shifter is placed, a resistance of a current path from a second cladding layer to a first cladding layer through the current narrowing window is minimum.Type: ApplicationFiled: November 19, 2018Publication date: November 4, 2021Applicant: Mitsubishi Electric CorporationInventors: Hiroaki MAEHARA, Ayumi FUCHIDA
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Patent number: 11084337Abstract: A sensor transmitter calculates a tilt angle for attachment of a G sensor to a corresponding one of wheels and estimates whether the sensor transmitter itself is attached to a right wheel or a left wheel based on a calculation quadratic function, a calculation linear function, a measurement quadratic function, and a measurement linear function. Then, a receiver determines whether the sensor transmitter is attached to a front wheel or a rear wheel based on the result of the estimation and an effective tire radius. In this manner, it can be determined which one of the wheels the sensor transmitter is attached to.Type: GrantFiled: June 17, 2019Date of Patent: August 10, 2021Assignee: DENSO CORPORATIONInventor: Hiroaki Maehara
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Patent number: 10906361Abstract: A wheel position detection apparatus is applicable to a vehicle in which four wheels provided with tires are attached to a vehicle body, and is provided with sensor transmitters and a receiver. The sensor transmitters each include an acceleration sensor and a first control portion that detects the position of the corresponding wheel on the basis of the acceleration thereof, and creates and transmits a frame in which data indicating the result of the wheel position detection are stored. The receiver is provided in the vehicle body, and includes: a receiving portion that receives each transmitted frame by means of a receiving antenna; and a second control portion that identifies whether the sensor transmitter that has transmitted each frame is attached to the right wheels or the left wheels, from among the four wheels.Type: GrantFiled: September 5, 2016Date of Patent: February 2, 2021Assignee: DENSO CORPORATIONInventor: Hiroaki Maehara
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Publication number: 20200117186Abstract: A reception range varying system includes a vehicle control device and a portable device. The reception range varying system determines whether a position where the portable device exists is within an execution range which enables execution of vehicle control over the portable device, or within a reception range but outside the execution range, and narrows the reception range so that the portable device is positioned outside the reception range while maintaining the reception range at a size equivalent to or larger than the execution range, on the basis that the position where the portable device exists is within the reception range but outside the execution range.Type: ApplicationFiled: November 26, 2019Publication date: April 16, 2020Inventors: Hiroaki MAEHARA, Ryusuke ISHIKAWA, Takayuki HATTORI, Tetsuya MIWA, Tatsuhito YOSHIDA
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Patent number: 10438942Abstract: A field-effect transistor with protection diodes includes: a field-effect transistor; and a two-terminal electrostatic protection circuit connected between a gate and a source of the field-effect transistor, wherein the two-terminal electrostatic protection circuit comprises: a first diode that is positioned on a reverse-biased side when a voltage lower than a potential of the source is applied to the gate and has a reverse withstand voltage lower than a reverse withstand voltage between the gate and the source of the field-effect transistor; a second diode that is positioned on a forward-biased side when a voltage lower than a potential of the source is applied to the gate and is connected in anti-series to the first diode; and a resistor that is connected in series to a diode pair comprising the first diode and the second diode and formed using a same channel layer as that of the field-effect transistor.Type: GrantFiled: September 29, 2016Date of Patent: October 8, 2019Assignee: Mitsubishi Electric CorporationInventors: Hiroaki Maehara, Miyo Miyashita, Kazuya Yamamoto
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Publication number: 20190299725Abstract: A sensor transmitter calculates a tilt angle for attachment of a G sensor to a corresponding one of wheels and estimates whether the sensor transmitter itself is attached to a right wheel or a left wheel based on a calculation quadratic function, a calculation linear function, a measurement quadratic function, and a measurement linear function. Then, a receiver determines whether the sensor transmitter is attached to a front wheel or a rear wheel based on the result of the estimation and an effective tire radius. In this manner, it can be determined which one of the wheels the sensor transmitter is attached to.Type: ApplicationFiled: June 17, 2019Publication date: October 3, 2019Inventor: Hiroaki MAEHARA
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Patent number: 10355130Abstract: A semiconductor device is provided with one or more gate fingers (20) that are provided in an active region on a semiconductor substrate (1), and a source finger (30) and a drain finger (40) that are provided in the active region and arranged alternately to allow each gate finger to be sandwiched between the source and drain fingers. The semiconductor device includes terminal circuit (60) that has inductive impedance at the frequency of a signal input to an input terminal of the one or more gate fingers, and is directly or indirectly connected to the one or more gate fingers at an area being spaced away from a connecting position of the input terminal (21a) of the one or more gate fingers (20).Type: GrantFiled: June 23, 2015Date of Patent: July 16, 2019Assignee: Mitsubishi Electric CorporationInventors: Shohei Imai, Kazuhiro Iyomasa, Koji Yamanaka, Hiroaki Maehara, Ko Kanaya, Tetsuo Kunii, Hideaki Katayama
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Patent number: 10340224Abstract: A package includes a conductor base plate having a element fixed to an upper surface thereof, a side wall provided on the conductor base plate to surround the element, the side wall having a conductor portion electrically connected to the conductor base plate, a dielectric cap disposed on the side wall, a front-side metal film provided on an outer surface of the dielectric cap, a first back-side metal film provided on an inner surface of the dielectric cap such that a center of the first back-side metal film approximately coincides with a center of a surface of the dielectric cap which faces the conductor base plate, and a plurality of vias passing through the dielectric cap to achieve electrical connection between the front-side metal film and the first back-side metal film and between the front-side metal film and the conductor portion oldie side wall.Type: GrantFiled: July 18, 2016Date of Patent: July 2, 2019Assignee: Mitsubishi Electric CorporationInventors: Miyo Miyashita, Kazuya Yamamoto, Hiroaki Maehara
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Patent number: 10170400Abstract: A multi-finger transistor includes a circuit suppressing a variation in voltage current distribution. The circuit connects gate fingers (21) to each other, or source fingers (31) to each other in a region which is located outside an active region (11) and on a side where a drain pad (42) is disposed. The multi-finger transistor is configured to be linearly symmetric with respect to a direction of propagation of a signal from a gate pad (22) at the position of the gate pad (22).Type: GrantFiled: July 21, 2015Date of Patent: January 1, 2019Assignee: Mitsubishi Electric CorporationInventors: Shohei Imai, Eigo Kuwata, Koji Yamanaka, Hiroaki Maehara, Akira Ohta
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Publication number: 20180257441Abstract: A wheel position detection apparatus is applicable to a vehicle in which four wheels provided with tires are attached to a vehicle body, and is provided with sensor transmitters and a receiver. The sensor transmitters each include an acceleration sensor and a first control portion that detects the position of the corresponding wheel on the basis of the acceleration thereof, and creates and transmits a frame in which data indicating the result of the wheel position detection are stored. The receiver is provided in the vehicle body, and includes: a receiving portion that receives each transmitted frame by means of a receiving antenna; and a second control portion that identifies whether the sensor transmitter that has transmitted each frame is attached to the right wheels or the left wheels, from among the four wheels.Type: ApplicationFiled: September 5, 2016Publication date: September 13, 2018Inventor: Hiroaki MAEHARA
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Publication number: 20180006152Abstract: A semiconductor device is provided with one or more gate fingers (20) that are provided in an active region on a semiconductor substrate (1), and a source finger (30) and a drain finger (40) that are provided in the active region and arranged alternately to allow each gate finger to be sandwiched between the source and drain fingers. The semiconductor device includes terminal circuit (60) that has inductive impedance at the frequency of a signal input to an input terminal of the one or more gate fingers, and is directly or indirectly connected to the one or more gate fingers at an area being spaced away from a connecting position of the input terminal (21a) of the one or more gate fingers (20).Type: ApplicationFiled: June 23, 2015Publication date: January 4, 2018Applicant: Mitsubishi Electric CorporationInventors: Shohei IMAI, Kazuhiro IYOMASA, Koji YAMANAKA, Hiroaki MAEHARA, Ko KANAYA, Tetsuo KUNII, Hideaki KATAYAMA
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Publication number: 20170317012Abstract: A multi-finger transistor includes a circuit suppressing a variation in voltage current distribution. The circuit connects gate fingers (21) to each other, or source fingers (31) to each other in a region which is located outside an active region (11) and on a side where a drain pad (42) is disposed. The multi-finger transistor is configured to be linearly symmetric with respect to a direction of propagation of a signal from a gate pad (22) at the position of the gate pad (22).Type: ApplicationFiled: July 21, 2015Publication date: November 2, 2017Applicant: Mitsubishi Electric CorporationInventors: Shohei IMAI, Eigo KUWATA, Koji YAMANAKA, Hiroaki MAEHARA, Akira OHTA
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Patent number: 9806039Abstract: In the present invention, in addition to arranging a plurality of amplifying elements in a staggered manner, signal path lengths from an input-side divider to gate pads of the plurality of amplifying elements are equalized, and signal path lengths from drain pads of the plurality of amplifying elements to an output-side combiner are equalized.Type: GrantFiled: January 12, 2016Date of Patent: October 31, 2017Assignee: Mitsubishi Electric CorporationInventors: Naoki Kosaka, Hiroaki Maehara, Ko Kanaya, Miyo Miyashita, Kazuya Yamamoto
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Publication number: 20170229445Abstract: A field-effect transistor with protection diodes includes: a field-effect transistor; and a two-terminal electrostatic protection circuit connected between a gate and a source of the field-effect transistor, wherein the two-terminal electrostatic protection circuit comprises: a first diode that is positioned on a reverse-biased side when a voltage lower than a potential of the source is applied to the gate and has a reverse withstand voltage lower than a reverse withstand voltage between the gate and the source of the field-effect transistor; a second diode that is positioned on a forward-biased side when a voltage lower than a potential of the source is applied to the gate and is connected in anti-series to the first diode; and a resistor that is connected in series to a diode pair comprising the first diode and the second diode and formed using a same channel layer as that of the field-effect transistor.Type: ApplicationFiled: September 29, 2016Publication date: August 10, 2017Applicant: Mitsubishi Electric CorporationInventors: Hiroaki MAEHARA, Miyo MIYASHITA, Kazuya YAMAMOTO
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Publication number: 20170141047Abstract: A package includes a conductor base plate having a element fixed to an upper surface thereof, a side wall provided on the conductor base plate to surround the element, the side wall having a conductor portion electrically connected to the conductor base plate, a dielectric cap disposed on the side wall, a front-side metal film provided on an outer surface of the dielectric cap, a first back-side metal film provided on an inner surface of the dielectric cap such that a center of the first back-side metal film approximately coincides with a center of a surface of the dielectric cap which faces the conductor base plate, and a plurality of vias passing through the dielectric cap to achieve electrical connection between the front-side metal film and the first back-side metal film and between the front-side metal film and the conductor portion oldie side wall.Type: ApplicationFiled: July 18, 2016Publication date: May 18, 2017Applicant: Mitsubishi Electric CorporationInventors: Miyo MIYASHITA, Kazuya YAMAMOTO, Hiroaki MAEHARA
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Patent number: 9602068Abstract: A configuration is provided with: a tuned line 13 that is connected between a branch terminal 3 and a branch terminal of branch lines 2 and 4; and a tuned line 14 that is connected between a combining terminal 7 and a combining terminal 9 of combining lines 10 and 11. This enables reduction of a non-uniform voltage distribution occurring due to a difference in characteristics between two amplifier elements 6 and 8.Type: GrantFiled: April 8, 2014Date of Patent: March 21, 2017Assignee: Mitsubishi Electric CorporationInventors: Shohei Imai, Hiroshi Otsuka, Koji Yamanaka, Hiroaki Maehara, Motoyoshi Koyanagi, Akira Ota
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Publication number: 20160308499Abstract: In the present invention, in addition to arranging a plurality of amplifying elements in a staggered manner, signal path lengths from an input-side divider to gate pads of the plurality of amplifying elements are equalized, and signal path lengths from drain pads of the plurality of amplifying elements to an output-side combiner are equalized.Type: ApplicationFiled: January 12, 2016Publication date: October 20, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Naoki KOSAKA, Hiroaki MAEHARA, Ko KANAYA, Miyo MIYASHITA, Kazuya YAMAMOTO