Patents by Inventor Hayato Kurasawa
Hayato Kurasawa 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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Publication number: 20220221956Abstract: Display device is provided and includes display part including first and second substrates, first and second polarizing plates, display area that includes pixel electrodes, a common electrode and display functional layer each of which is arranged between first and second substrates, display image formed by applying display voltage between pixel electrodes and common electrode in display period, input part including third substrate having back surface facing front surface of display part, detection electrodes formed on back surface of third substrate, and conductive layer provided between back surface of third substrate and front surface of display part, wherein conductive layer overlaps third substrate without through detection electrodes outside display area, and part of detection electrodes is uncovered by conductive layer outside display area.Type: ApplicationFiled: March 28, 2022Publication date: July 14, 2022Inventors: Hayato KURASAWA, Kohei AZUMI, Koji ISHIZAKI, Hideki KANEKO, Tsutomu HARADA
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Patent number: 11385739Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixel electrodes; a plurality of detection electrodes arranged in a matrix in a display area of the substrate; a plurality of detection electrode lines coupled to the respective detection electrodes; a plurality of first electrodes provided in the same layer as the detection electrodes or the detection electrode lines and extending in a first direction; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of signal lines coupled to the switching elements and extending in a second direction crossing the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal in a first sensing period in which an electromagnetic induction method is used.Type: GrantFiled: February 23, 2021Date of Patent: July 12, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Fumitaka Gotoh, Gen Koide, Tadayoshi Katsuta
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Patent number: 11385489Abstract: A display device includes: a plurality of first electrodes arranged in a display region for displaying an image; a second electrode opposed to the first electrodes; a plurality of switching elements that are arranged in the display region and coupled to the first electrodes or the second electrode; a gate line for supplying a scanning signal for scanning the switching elements; a data line for supplying a signal to the switching elements that are coupled to the switching elements; and conductive wire that is opposed to the second electrode via an insulating layer and is coupled to the switching elements.Type: GrantFiled: November 30, 2020Date of Patent: July 12, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi
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Patent number: 11378833Abstract: A display apparatus includes a first substrate, a second substrate facing the first substrate, lead wirings provided on the first substrate or the second substrate and a first insulator part provided on an upper surface of the second substrate. The lead wirings are arranged in a peripheral region when seen in a plan view and the first insulator part is arranged so as to overlap a display region when seen in a plan view. Second insulator parts or spaces with a permittivity lower than a permittivity of the first insulator part are provided at sides of the first insulator part. The second insulator parts or the spaces are arranged so as to overlap the lead wirings in the peripheral region when seen in a plan view.Type: GrantFiled: August 27, 2020Date of Patent: July 5, 2022Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Masanobu Ikeda, Hayato Kurasawa, Yoshihiro Watanabe
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Patent number: 11373611Abstract: A sensor-equipped display device is provided and includes display panel including first and second substrates, common electrode, and polarizer; backlight unit which emits light toward display panel, including light guide opposed to polarizer and light source which emits light toward light guide; conductive member arranged at back side of display panel and opposed to polarizer; controller; first flexible printed circuit; and second flexible printed circuit, wherein first flexible printed circuit is connected to display panel, second flexible printed circuit is connected to back side of first flexible printed circuit, common electrode is connected to controller via first flexible printed circuit, second flexible printed circuit comprises first branch portion and second branch portion, first branch portion is connected to light source, and conductive member is connected to controller via second branch portion of second flexible printed circuit and first flexible printed circuit.Type: GrantFiled: July 10, 2020Date of Patent: June 28, 2022Assignee: Japan Display Inc.Inventors: Kazuyuki Kobayashi, Hayato Kurasawa, Hiroshi Mizuhashi, Masaya Tamaki, Takeo Koito, Koji Noguchi
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Publication number: 20220197423Abstract: According to one embodiment, a touch detection device includes first detection electrodes in a detection area, second detection electrodes in the detection area, extending to intersect the first detection electrodes, first control lines connected to the first detection electrodes, respectively, and provided in a non-detection area, and second control lines connected to the second detection electrodes, respectively, and provided in the non-detection area. The second control lines overlap the first control lines at a plurality of positions as seen in plan view, such that areas of overlapping portions in which the first control lines overlap the second control lines are substantially equalized.Type: ApplicationFiled: March 9, 2022Publication date: June 23, 2022Inventors: Chihiro TANAKA, Naoki TAKADA, Toshihiko TANAKA, Hayato KURASAWA, Koji ISHIZAKI, Tatsuya WAKIMOTO, Masaki MIYATAKE
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Patent number: 11360341Abstract: A display device is provided and including first and second substrates, wherein the first substrate includes a first area, a second area overlapping the second substrate, a first edge extending in a first direction, a first terminal portion on the first area; the second substrate has a first protruding portion protruding toward the first edge of the first substrate and a second edge including a linear portion along the first edge and a curved portion connected to the linear portion and extending toward the first edge, the curved portion constitutes a part of a edge of the first protruding portion, and a width in the first direction of the first protruding portion gradually decreases toward the first edge.Type: GrantFiled: May 19, 2020Date of Patent: June 14, 2022Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Hayato Kurasawa, Masanobu Ikeda
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Patent number: 11347338Abstract: According to one embodiment, a detection device includes a substrate, detection electrode, terminal formed of a metal material, lead, coating layer, conductive adhesion layer, and circuit board. The lead connects the electrode and the terminal. The coating layer covers the electrode and the lead, and partly covers the terminal. The adhesion layer covers a part of the terminal exposed from the coating layer and covers a part of the coating layer. The circuit board is connected to the terminal with the adhesion layer interposed therebetween. At least in an overlapping area where the adhesion layer covers the coating layer, an area of the metal material per unit area is smaller than that of the other area of the terminal.Type: GrantFiled: August 10, 2020Date of Patent: May 31, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Keisuke Asada, Tatsuya Ide, Koji Ishizaki
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Patent number: 11347362Abstract: According to an example aspect, an electronic device comprises a substrate, pixels on the substrate, a first electrode overlapping the pixels in a plan view, and a second electrode overlapping an edge of the first electrode in a plan view. The first electrode has a first region that overlaps the second electrode in a plan view and a second region that does not overlap the second electrode in a plan view.Type: GrantFiled: February 4, 2020Date of Patent: May 31, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Makoto Hayashi, Naosuke Furutani
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Publication number: 20220164054Abstract: A display device includes a substrate, first electrodes, lines, pixel electrodes, a display functional layer, a common electrode, second electrodes, and a controller. The first electrodes are opposed to the second electrodes with a space therebetween, and an insulating layer is provided between the common electrode and the first and second electrodes. During the display periods, in response to a control signal from the controller, the pixel electrodes are supplied with a pixel signal through the lines, and the common electrode is supplied with a common signal. During the sensing period, in response to the control signal from the controller, the lines are supplied with a first drive signal to generate a magnetic field. The first electrodes are supplied with a second drive signal to generate electrostatic capacitance between themselves and the second electrodes in response to the control signal from the controller, synchronously or asynchronously with the display periods.Type: ApplicationFiled: February 8, 2022Publication date: May 26, 2022Applicant: Japan Display Inc.Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI, Tadayoshi KATSUTA
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Publication number: 20220155892Abstract: According to one embodiment, an electrostatic capacitance-type sensor-equipped display device includes a display panel with a display surface which displays an image. The sensor includes a plurality of detection electrodes disposed in a matrix, the detection electrodes being mutually electrically independently provided above the display surface and being configured to detect a variation in electrostatic capacitance, and a plurality of lead lines provided above the display surface, connected to the detection electrodes in a one-to-one correspondence, and formed of a metal.Type: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Inventors: Koji Noguchi, Koji Ishizaki, Hayato Kurasawa
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Publication number: 20220155936Abstract: A touch panel is disclosed herein. In an embodiment, the touch panel includes a substrate with first and second surfaces, a drive electrode facing the first surface, a plurality of touch detection electrodes facing the second surface, and a dummy electrode between adjacent touch detection electrodes. Each touch detection electrode includes a first conductive thin wire extending parallel to the first and second surfaces. The dummy electrode includes a second conductive thin wire extending along the first conductive thin wire. The first conductive thin wire includes a first bent portion and a second bent portion alternately arranged with the first conductive thin wire having a zigzag pattern. The second conductive thin wire includes a third bent portion and a slit that are alternately arranged. The third bent portion is arranged on a virtual straight line formed by virtually connecting the first bent portions of one first conductive thin wire.Type: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
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Publication number: 20220146892Abstract: A display device includes a first substrate, a second substrate, a display functional layer, first electrodes, pixel electrodes, second electrodes, a drive circuit, and a conductive body. The second substrate faces the first substrate. The display functional layer is provided between the first substrate and the second substrate. The first electrodes are provided between the first substrate and the second substrate. The pixel electrodes face the first electrodes between the first substrate and the second substrate. The second electrodes overlap the first electrodes through the display functional layer. The drive circuit supplies drive signals to a pair of the first electrode, wherein the drive circuit supplies a first electric potential to one of the pair of first electrodes and supplies a drive signal having a second electric potential different from the first electric potential to the other of the pair of first electrodes simultaneously.Type: ApplicationFiled: January 26, 2022Publication date: May 12, 2022Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI
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Patent number: 11327591Abstract: A display device with a touch detection device is provided and includes display elements arranged in matrix of row and column direction and surrounded by scan lines each extending in a first direction and a signal lines each extending in a second direction, the display elements including a red display element, a green display element, and a blue display element; light shielding members each extending in one direction, the light shielding members arranged between the display elements adjacent to each other; and touch detection electrodes each extending in the one direction and arranged between the light shielding members and the display elements, and the touch detection electrodes including metal wires that extend overlapping the light shielding members, Wherein the metal wires are divided into metal wire parts that are arranged in the column direction, and the metal wire parts, each being longitudinal in the one direction, are disposed without crossing each other and spaced from each other in the one directioType: GrantFiled: March 22, 2021Date of Patent: May 10, 2022Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
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Patent number: 11308304Abstract: A fingerprint detection device includes: a substrate having a first surface and a second surface on an opposite side of the first surface, the first surface serving as a detection surface configured to detect unevenness of an object in contact or in proximity; a detection electrode provided on the second surface side of the substrate and configured to detect unevenness of a finger in contact or in proximity on the basis of an electrostatic capacitance change; and a drive circuit provided on the second surface side of the substrate and configured to supply a drive signal to the detection electrode.Type: GrantFiled: May 26, 2020Date of Patent: April 19, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Toshinori Uehara, Hiroshi Mizuhashi
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Patent number: 11301075Abstract: According to one embodiment, a touch detection device includes first detection electrodes in a detection area, second detection electrodes in the detection area, extending to intersect the first detection electrodes, first control lines connected to the first detection electrodes, respectively, and provided in a non-detection area, and second control lines connected to the second detection electrodes, respectively, and provided in the non-detection area. The second control lines overlap the first control lines at a plurality of positions as seen in plan view, such that areas of overlapping portions in which the first control lines overlap the second control lines are substantially equalized.Type: GrantFiled: February 26, 2021Date of Patent: April 12, 2022Assignee: Japan Display Inc.Inventors: Chihiro Tanaka, Naoki Takada, Toshihiko Tanaka, Hayato Kurasawa, Koji Ishizaki, Tatsuya Wakimoto, Masaki Miyatake
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Patent number: 11287912Abstract: A display device includes a substrate, first electrodes, lines, pixel electrodes, a display functional layer, a common electrode, second electrodes, and a controller. The first electrodes are opposed to the second electrodes with a space therebetween, and an insulating layer is provided between the common electrode and the first and second electrodes. During the display periods, in response to a control signal from the controller, the pixel electrodes are supplied with a pixel signal through the lines, and the common electrode is supplied with a common signal. During the sensing period, in response to the control signal from the controller, the lines are supplied with a first drive signal to generate a magnetic field. The first electrodes are supplied with a second drive signal to generate electrostatic capacitance between themselves and the second electrodes in response to the control signal from the controller, synchronously or asynchronously with the display periods.Type: GrantFiled: July 31, 2020Date of Patent: March 29, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Tadayoshi Katsuta
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Patent number: 11287934Abstract: The reliability of a display device with an input device is improved. A plurality of detection electrodes (input position detection electrodes) forming an electrostatic capacity between them and a common electrode of a display device to detect an input position are formed on a different substrate from substrates configuring the display device. Moreover, a polarizing plate and the substrate on which the plurality of detection electrodes are formed are adhesively fixed via, for example, an adhesive layer so that the plurality of detection electrodes are fixed so as to be separated apart from the display device. Thus, a distance between electrodes (the detection electrode and a driving electrode) for detecting an input position can be set separately from a thickness of the display device, and therefore, reduction in detection sensitivity (detection reliability) for the input position due to increase in the electrostatic capacity can be suppressed.Type: GrantFiled: July 1, 2020Date of Patent: March 29, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Kohei Azumi, Koji Ishizaki, Hideki Kaneko, Tsutomu Harada
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Publication number: 20220091465Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.Type: ApplicationFiled: December 6, 2021Publication date: March 24, 2022Applicant: JAPAN DISPLAY INC.Inventors: Kenta SEKI, Gen KOIDE, Hayato KURASAWA
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Patent number: 11274943Abstract: A detection apparatus includes a substrate, a display area, a peripheral area, a plurality of electrodes, a plurality of terminals, a first wire, and a second wire. The display area is provided on the surface of the substrate. The peripheral area is provided outside the display area. The electrodes are provided to the display area. The terminals are provided in correspondence with the respective electrodes in the peripheral area. The first wire couples an electrode to a terminal. The second wire couples the electrode to the terminal to which the first wire is coupled.Type: GrantFiled: June 9, 2021Date of Patent: March 15, 2022Assignee: Japan Display Inc.Inventors: Koji Noguchi, Koji Ishizaki, Hayato Kurasawa