Patents by Inventor Toshiaki Fukushima
Toshiaki Fukushima 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: 11604526Abstract: A driving circuit is provided for display device having pixel electrodes and drive electrodes facing the pixel electrodes in display area. The driving circuit includes touch wiring that is routed in frame area located outside display area and supplies alternating current touch drive signal to drive electrodes; display wiring that supplies display drive voltage; and switches conducting between at least one of drive electrodes and touch wiring in touch detection period, and conducting between at least one of drive electrodes and display wiring in display period, wherein display wiring is disposed closer to display area than touch wiring.Type: GrantFiled: August 16, 2021Date of Patent: March 14, 2023Assignee: Japan Display Inc.Inventor: Toshiaki Fukushima
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Patent number: 11422511Abstract: An electronic watch with a two-coil stepper motor including: a magnetized rotor; a stator including: first and second stator magnetic-pole portions, which are formed so as to oppose to each other through the rotor; and a third stator magnetic-pole portion, which is formed between the first stator magnetic-pole portion and the second stator magnetic-pole portion so as to face the rotor; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; and a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; and a high-speed drive pulse generation circuit configured to output a drive pulse for driving the rotor to the coil A or the coil B, and wherein the rotor is rotationally driven in increments of 360° due to a drive pulse train formed of the plurality of drive pulses.Type: GrantFiled: June 29, 2020Date of Patent: August 23, 2022Assignee: CITIZEN WATCH CO., LTD.Inventors: Yu Takyoh, Toshiaki Fukushima, Toshinari Maeda, Daisuke Iri, Daisuke Matsuoh, Masatoshi Nishida
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Publication number: 20210373697Abstract: A driving circuit is provided for display device having pixel electrodes and drive electrodes facing the pixel electrodes in display area. The driving circuit includes touch wiring that is routed in frame area located outside display area and supplies alternating current touch drive signal to drive electrodes; display wiring that supplies display drive voltage; and switches conducting between at least one of drive electrodes and touch wiring in touch detection period, and conducting between at least one of drive electrodes and display wiring in display period, wherein display wiring is disposed closer to display area than touch wiring.Type: ApplicationFiled: August 16, 2021Publication date: December 2, 2021Inventor: Toshiaki FUKUSHIMA
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Patent number: 11093062Abstract: A display device with a touch detection function is provided and including a display area including pixels arranged in a matrix on a substrate; drive electrodes disposed to face at least one of the pixels; an electro-optical element configured to display an image in the display area; first wiring that is routed in a frame area located outside the display area and configured to supply an alternating current drive signal to the drive electrodes; and second wiring configured to supply a direct current drive voltage, wherein the second wiring is disposed closer to the display area than the first wiring.Type: GrantFiled: March 11, 2020Date of Patent: August 17, 2021Assignee: Japan Display Inc.Inventor: Toshiaki Fukushima
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Patent number: 11086273Abstract: Provided is a drive circuit for a two-coil stepper motor, including: a rotor; a stator including first, second, and third stator magnetic-pole portions; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; a drive pulse generation circuit configured to output a drive pulse; a detection pulse generation circuit configured to output a detection pulse for detecting counter-electromotive currents generated in the coil A and the coil B; and a rotation detection circuit configured to receive a detection signal generated due to the detection pulse as input to determine whether or not the rotor has rotated.Type: GrantFiled: September 24, 2019Date of Patent: August 10, 2021Assignee: CITIZEN WATCH CO., LTD.Inventors: Yu Takyoh, Toshiaki Fukushima, Toshinari Maeda, Daisuke Iri, Daisuke Matsuoh
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Publication number: 20210130969Abstract: Provided are a technique with which a satin-like appearance can be obtained in nickel-plating by a nickel-plating additive characterized by containing a benzethonium salt, a satin nickel-plating bath containing the same, and a satin nickel-plating method using the same.Type: ApplicationFiled: January 12, 2021Publication date: May 6, 2021Applicant: JCU CORPORATIONInventors: Kazuo IBATA, Kaori NAKAYAMA, Kana SHIBATA, Toshiaki FUKUSHIMA, Shinsuke TAKAGI
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Patent number: 10955953Abstract: A liquid crystal display device is provided and includes a liquid crystal element array having pixel electrodes and switching elements arranged in a matrix form; scanning lines arranged in each row of the liquid crystal element array and supply a scanning signal to switching elements; signal lines arranged in each column of the liquid crystal element array and supply an image signal to the pixel electrodes through switching elements; touch electrodes overlapping pixel electrodes and arranged in the column of the liquid crystal element array; signal line drive circuit arranged along one side of the liquid crystal element array parallel to the row of the liquid crystal element array and forms the image signal; first circuit arranged along the other side of the liquid crystal element array parallel to the row of the liquid crystal element array and is connected to the touch electrodes; and second circuit arranged along the one side of the liquid crystal element array and is connected to the touch electrodes, wheType: GrantFiled: April 27, 2020Date of Patent: March 23, 2021Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Yasuyuki Teranishi, Toshiaki Fukushima, Daisuke Ito, Gen Koide, Tadayoshi Katsuta
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Publication number: 20200333749Abstract: An electronic watch with a two-coil stepper motor including: a magnetized rotor; a stator including: first and second stator magnetic-pole portions, which are formed so as to oppose to each other through the rotor; and a third stator magnetic-pole portion, which is formed between the first stator magnetic-pole portion and the second stator magnetic-pole portion so as to face the rotor; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; and a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; and a high-speed drive pulse generation circuit configured to output a drive pulse for driving the rotor to the coil A or the coil B, and wherein the rotor is rotationally driven in increments of 360° due to a drive pulse train formed of the plurality of drive pulses.Type: ApplicationFiled: June 29, 2020Publication date: October 22, 2020Inventors: Yu TAKYOH, Toshiaki FUKUSHIMA, Toshinari MAEDA, Daisuke IRI, Daisuke MATSUOH, Masatoshi NISHIDA
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Patent number: 10754299Abstract: An electronic watch with a two-coil stepper motor including: a magnetized rotor; a stator including: first and second stator magnetic-pole portions, which are formed so as to oppose to each other through the rotor; and a third stator magnetic-pole portion, which is formed between the first stator magnetic-pole portion and the second stator magnetic-pole portion so as to face the rotor; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; and a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; and a high-speed drive pulse generation circuit configured to output a drive pulse for driving the rotor to the coil A or the coil B, and wherein the rotor is rotationally driven in increments of 360° due to a drive pulse train formed of the plurality of drive pulses.Type: GrantFiled: February 15, 2017Date of Patent: August 25, 2020Assignee: CITIZEN WATCH CO., LTD.Inventors: Yu Takyoh, Toshiaki Fukushima, Toshinari Maeda, Daisuke Iri, Daisuke Matsuoh, Masatoshi Nishida
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Publication number: 20200257401Abstract: A liquid crystal display device is provided and includes a liquid crystal element array having pixel electrodes and switching elements arranged in a matrix form; scanning lines arranged in each row of the liquid crystal element array and supply a scanning signal to switching elements; signal lines arranged in each column of the liquid crystal element array and supply an image signal to the pixel electrodes through switching elements; touch electrodes overlapping pixel electrodes and arranged in the column of the liquid crystal element array; signal line drive circuit arranged along one side of the liquid crystal element array parallel to the row of the liquid crystal element array and forms the image signal; first circuit arranged along the other side of the liquid crystal element array parallel to the row of the liquid crystal element array and is connected to the touch electrodes; and second circuit arranged along the one side of the liquid crystal element array and is connected to the touch electrodes, wheType: ApplicationFiled: April 27, 2020Publication date: August 13, 2020Inventors: Hiroshi MIZUHASHI, Yasuyuki TERANISHI, Toshiaki FUKUSHIMA, Daisuke ITO, Gen KOIDE, Tadayoshi KATSUTA
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Patent number: 10732754Abstract: According to one embodiment, a display device includes first and second substrate units, a display function layer, and a drive element. The first substrate unit includes a first substrate, a display unit, and a control circuit unit. The first substrate has a first surface including a display region and a peripheral region. The display unit is provided in the display region, and includes first lines, second lines, switch elements, pixel electrodes, and third lines. The control circuit unit is provided in the peripheral region, and includes a first circuit unit including a third line connection line, and a third line switch. The second substrate unit includes a second substrate and fourth lines. The display function layer is provided between the first and second substrate units. The drive element is provided on the peripheral region. The first circuit unit is partially disposed between the drive element and the first substrate.Type: GrantFiled: September 9, 2019Date of Patent: August 4, 2020Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Toshiaki Fukushima, Gen Koide, Yoshiyuki Kii
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Publication number: 20200210000Abstract: A display device with a touch detection function is provided and including a display area including pixels arranged in a matrix on a substrate; drive electrodes disposed to face at least one of the pixels; an electro-optical element configured to display an image in the display area; first wiring that is routed in a frame area located outside the display area and configured to supply an alternating current drive signal to the drive electrodes; and second wiring configured to supply a direct current drive voltage, wherein the second wiring is disposed closer to the display area than the first wiring.Type: ApplicationFiled: March 11, 2020Publication date: July 2, 2020Inventor: Toshiaki FUKUSHIMA
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Patent number: 10684712Abstract: A display apparatus includes a first pad electrically connected to the drive circuit, a voltage supply line having one end electrically connected to the first pad, a common wire electrically connected to the voltage supply line and the second electrode, a transistor formed between the voltage supply line and the common wire, and a branch wire being a part of the voltage supply line, extending from a branch section, and electrically connected to the first pad. Then, the branch section is located closer to a center of the insulating substrate than the first pad in a plan view.Type: GrantFiled: January 17, 2017Date of Patent: June 16, 2020Assignee: Japan Display Inc.Inventors: Tadayoshi Katsuta, Toshiaki Fukushima, Naoyuki Obinata, Gen Koide
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Patent number: 10635229Abstract: A liquid crystal display device includes a liquid crystal element array having liquid crystal display elements arranged in matrix, scanning lines arranged in each row of the liquid crystal element array and supplying a scanning signal to the liquid crystal display elements in a corresponding row, signal lines arranged in each column of the liquid crystal element array and supplying an image signal to the liquid crystal display elements in a corresponding column, drive electrodes arranged in the column of the liquid crystal element array and to which a drive signal to detect a touch is supplied, a signal line drive circuit arranged along one side of the liquid crystal element array parallel to the row of the liquid crystal element array and forming the image signal, and a first electrode drive circuit arranged along the other side of the liquid crystal element array and forming the drive signal.Type: GrantFiled: October 16, 2018Date of Patent: April 28, 2020Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Yasuyuki Teranishi, Toshiaki Fukushima, Daisuke Ito, Gen Koide, Tadayoshi Katsuta
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Patent number: 10606428Abstract: According to an aspect, a display device with a touch detection function includes a controller, touch wiring that supplies a touch drive signal to drive electrodes, and a plurality of switch groups that are provided for each of the drive electrodes, each of the plurality of switch groups having selection switches. The plurality of switch groups select a drive electrode to be coupled to a touch wiring based on a selection signal from the controller. The selection switches for each of the plurality of switch groups are coupled in parallel with each other between a corresponding drive electrode and the touch wiring, and for each of the drive electrodes, all of the selection switches operate in accordance with the selection signal, couple the corresponding drive electrodes and the touch wiring, and apply the touch drive signal to the corresponding drive electrodes.Type: GrantFiled: January 23, 2019Date of Patent: March 31, 2020Assignee: Japan Display Inc.Inventor: Toshiaki Fukushima
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Patent number: 10606385Abstract: A display device provided with a touch sensor, includes a plurality of common electrodes, a plurality of display elements arranged in a matrix, a plurality of gate lines electrically connected to the display elements and arranged in a row direction, and a plurality of source lines electrically connected to the display elements and arranged in a column direction. The plurality of common electrodes for display are also used for the touch sensor. An image display operation of the plurality of common electrodes for display and a driving operation of the plurality of common electrodes for the touch sensor are performed in a time sharing manner, and all of the gate lines and the source lines are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor.Type: GrantFiled: July 31, 2017Date of Patent: March 31, 2020Assignee: Japan Display Inc.Inventors: Toshiaki Fukushima, Koji Noguchi, Hiroshi Mizuhashi, Gen Koide, Tadayoshi Katsuta
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Patent number: 10572050Abstract: According to one embodiment, a display device includes first and second substrate units, a display function layer, and a drive element. The first substrate unit includes a first substrate, a display unit, and a circuit unit. The first substrate has a first surface including a display region and a peripheral region. The display unit is provided in the display region, and includes first lines, second lines, switch elements, pixel electrodes, and third lines. The circuit unit is provided in the peripheral region, and is electrically connected to one of the second lines and one of the third lines. The second substrate unit includes a second substrate and fourth lines. The display function layer is provided between the first and second substrate units. The drive element is provided on the peripheral region. At least a portion of the circuit unit is disposed between the drive element and the first substrate.Type: GrantFiled: October 2, 2018Date of Patent: February 25, 2020Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Tadayoshi Katsuta, Gen Koide, Toshiaki Fukushima
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Patent number: 10545459Abstract: Provided is a drive circuit for a two-coil stepper motor, including: a rotor; a stator including first, second, and third stator magnetic-pole portions; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; a drive pulse generation circuit configured to output a drive pulse; a detection pulse generation circuit configured to output a detection pulse for detecting counter-electromotive currents generated in the coil A and the coil B; and a rotation detection circuit configured to receive a detection signal generated due to the detection pulse as input to determine whether or not the rotor has rotated.Type: GrantFiled: September 9, 2016Date of Patent: January 28, 2020Assignee: Citizen Watch Co., LTD.Inventors: Yu Takyoh, Toshiaki Fukushima, Toshinari Maeda, Daisuke Iri, Daisuke Matsuoh
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Publication number: 20200019124Abstract: Provided is a drive circuit for a two-coil stepper motor, including: a rotor; a stator including first, second, and third stator magnetic-pole portions; a coil A to be magnetically coupled to the first stator magnetic-pole portion and the third stator magnetic-pole portion; a coil B to be magnetically coupled to the second stator magnetic-pole portion and the third stator magnetic-pole portion; a drive pulse generation circuit configured to output a drive pulse; a detection pulse generation circuit configured to output a detection pulse for detecting counter-electromotive currents generated in the coil A and the coil B; and a rotation detection circuit configured to receive a detection signal generated due to the detection pulse as input to determine whether or not the rotor has rotated.Type: ApplicationFiled: September 24, 2019Publication date: January 16, 2020Inventors: Yu TAKYOH, Toshiaki FUKUSHIMA, Toshinari MAEDA, Daisuke IRI, Daisuke MATSUOH
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Patent number: 10528196Abstract: A display apparatus which can reduce a parasitic capacitance during driving of driving electrodes based on a self-capacitance detecting method is provided. The display apparatus includes: a plurality of connection wires which are formed in a peripheral area and are connected to a plurality of corresponding video signal lines; a video signal line selection circuit which is connected with a plurality of connection wires, selects at least one connection wire and supplies a signal to the video signal lines; self-capacitance detection wires which extend in a direction intersecting an extension direction of the connection wires and intersects the connection wires; common wires which electrically connect the self-capacitance detection wires and drive electrodes; and transistors which are provided between the self-capacitance detection wires and the common wires. Further, the self-capacitance detection wires extend between a display area and the video signal line selection circuit in a plan view.Type: GrantFiled: January 19, 2017Date of Patent: January 7, 2020Assignee: Japan Display Inc.Inventors: Gen Koide, Tadayoshi Katsuta, Toshiaki Fukushima, Naoyuki Obinata