Patents by Inventor Hiroshi Mizuhashi
Hiroshi Mizuhashi 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: 11562595Abstract: A fingerprint sensor is provided and includes substrate; sensor electrodes on substrate; first switches coupled to sensor electrodes; organic layer covering sensor electrodes; control line drive circuit in first direction; signal line drive circuit in second direction orthogonal to first direction; signal lines coupled to first switches; control lines coupling first switches to control line drive circuit; sensor drive electrode surrounding sensor electrodes; second switches between signal line drive circuit and signal lines; and first number of third switches between signal line drive circuit and first number of second switches, wherein distance of sensor drive electrode from surface of substrate is larger than distance of sensor electrodes from surface of substrate, and wherein first number is less than number of all second switches.Type: GrantFiled: February 26, 2021Date of Patent: January 24, 2023Assignee: Japan Display Inc.Inventors: Fumihito Shibano, Hiroshi Mizuhashi, Toshinori Uehara, Kimiyo Nonoyama, Hayato Kurasawa
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Publication number: 20220413646Abstract: A touch detection device is provided and includes a plurality of driving electrodes for detecting an external proximity object in a detection area; a first driving circuit to drive the plurality of driving electrodes; and a second driving circuit to drive the plurality of driving electrodes, wherein the first driving circuit and the second driving circuit sandwich the detection area in a plan view.Type: ApplicationFiled: August 26, 2022Publication date: December 29, 2022Inventors: Daisuke ITO, Hiroshi MIZUHASHI, Makoto HAYASHI, Yasuyuki TERANISHI, Tadayoshi KATSUTA
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Patent number: 11500485Abstract: A display device with a touch detection function is provided and includes a display area where a plurality of pixel electrodes are arranged in a matrix having a first direction and a second direction crossing the first direction above a substrate; common electrodes provided so as to face the pixel electrodes; an insulating layer between the common electrodes and the pixel electrodes; a display functional layer having an image display function of displaying an image on the display area; a plurality of pixel signal lines each coupled to the pixel electrodes, the pixel signal lines each extending in the first direction; a source selector that are coupled to the pixels through the pixel signal lines and that performs a switching operation, the source selector including a plurality of source switches; and a control device for performing image display control by applying a display drive voltage between the pixel electrodes and the common electrodes based on an image signal to exert the image display function of theType: GrantFiled: December 31, 2020Date of Patent: November 15, 2022Assignee: Japan Display Inc.Inventors: Tadayoshi Katsuta, Hiroshi Mizuhashi
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Patent number: 11494020Abstract: A display device comprises a first power supply line supplying a first potential, a second power supply line supplying a second potential, a third power supply line supplying a touch driving signal, and a display unit including a plurality of sub-pixels. The display unit comprises a plurality of first electrodes respectively provided in the plurality of sub-pixels and electrically connected to the first power supply line, a second electrode provided to be common among the plurality of sub-pixels and electrically connected to the second power supply line, a light emitting layer provided between the first electrode and the second electrode, a plurality of third electrodes electrically connected to the third power supply line, and a signal control circuit supplying a signal synchronized with a touch driving signal to the second electrode in a period in which a touch driving signal is supplied to the plurality of third electrodes.Type: GrantFiled: June 23, 2021Date of Patent: November 8, 2022Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Hayato Kurasawa, Yoshitoshi Kida, Toshinori Uehara, Takayuki Nakanishi
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Publication number: 20220342247Abstract: 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: ApplicationFiled: July 6, 2022Publication date: October 27, 2022Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI
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Publication number: 20220326814Abstract: An input device is provided and includes substrate; first metal mesh shape electrodes provided on layer of substrate; second metal mesh shape electrodes provided on same layer of the substrate as first metal mesh shape electrodes; second metal connection electrodes each of which connects adjacent two of second metal mesh shape electrodes on same layer as first metal mesh shape electrodes; insulating film covering second metal connection electrodes; first transparent connection electrodes each of which connects adjacent two of first metal mesh shape electrodes on insulating film; and protective film covering first metal mesh shape electrodes, second metal mesh shape electrodes, and first transparent connection electrodes.Type: ApplicationFiled: June 29, 2022Publication date: October 13, 2022Inventors: Koji ISHIZAKI, Hayato KURASAWA, Hiroshi MIZUHASHI
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Publication number: 20220310029Abstract: 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: ApplicationFiled: June 16, 2022Publication date: September 29, 2022Inventors: Kazuyuki KOBAYASHI, Hayato KURASAWA, Hiroshi MIZUHASHI, Masaya TAMAKI, Takeo KOITO, Koji NOGUCHI
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Publication number: 20220300139Abstract: 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: ApplicationFiled: June 7, 2022Publication date: September 22, 2022Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI, Fumitaka GOTOH, Gen KOIDE, Tadayoshi KATSUTA
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Patent number: 11429212Abstract: A touch detection device is provided and includes driving electrodes for detecting an external proximity object, extending in first direction and arranged in second direction; first voltage line extending in second direction; second voltage line extending in second direction; third voltage line extending in second direction, third voltage line being narrower in than first voltage line and second voltage line in width; and switching circuit for electrically connecting driving electrodes and first voltage line, second voltage line, or third voltage line.Type: GrantFiled: September 18, 2020Date of Patent: August 30, 2022Assignee: Japan Display Inc.Inventors: Daisuke Ito, Hiroshi Mizuhashi, Makoto Hayashi, Yasuyuki Teranishi, Tadayoshi Katsuta
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Patent number: 11410451Abstract: A display panel including a display function layer displaying an image in a display area, a cover member including a first face and a second face disposed on an opposite side of the first face and faces the display panel, and a fingerprint sensor including a plurality of first detection electrodes disposed in a sensor base and configured to detect unevenness of an object brought into contact with or approaching the first face of the cover member, a shield electrode disposed to face the plurality of first detection electrodes and configured to suppress a change in capacitance between the first detection electrodes and the shield electrode, and switching elements disposed in correspondence with the first detection electrodes, the fingerprint sensor being arranged between the cover member and the display panel and arranged to overlap with the display area when viewed in a direction perpendicular to the first face are included.Type: GrantFiled: October 22, 2020Date of Patent: August 9, 2022Assignee: Japan Display Inc.Inventors: Toshinori Uehara, Yoshitoshi Kida, Hiroshi Mizuhashi, Hayato Kurasawa, Yuji Suzuki, Shoji Hinata, Toshiya Yamazaki
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Patent number: 11409392Abstract: Included are a first cover base including an alkali glass layer, a first alkali-free glass layer provided on one face of the alkali glass layer, and a second alkali-free glass layer provided on another face of the alkali glass layer and a sensor that is provided on the first alkali-free glass layer of the first cover base and includes a plurality of first electrodes configured to detect the unevenness of a surface of an object to be detected that comes into contact with or close to the first cover base and a switching element. At least the first electrodes are formed above the first alkali-free glass layer and in a transmissive area that passes an image.Type: GrantFiled: May 11, 2021Date of Patent: August 9, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Shoji Hinata, Toshinori Uehara, Hiroshi Mizuhashi, Yuji Suzuki, Yasuhiro Kanaya
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Patent number: 11409398Abstract: An input device is provided and includes substrate; first metal mesh shape electrodes provided on layer of substrate; second metal mesh shape electrodes provided on same layer of the substrate as first metal mesh shape electrodes; second metal connection electrodes each of which connects adjacent two of second metal mesh shape electrodes on same layer as first metal mesh shape electrodes; insulating film covering second metal connection electrodes; first transparent connection electrodes each of which connects adjacent two of first metal mesh shape electrodes on insulating film; and protective film covering first metal mesh shape electrodes, second metal mesh shape electrodes, and first transparent connection electrodes.Type: GrantFiled: September 1, 2020Date of Patent: August 9, 2022Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Hayato Kurasawa, Hiroshi Mizuhashi
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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: 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: 20220171486Abstract: A display panel with a touch detection function, in which display operation is less affected by touch detection operation, a method of driving the display panel with a touch detection function, a driving circuit, and an electronic unit having the display panel with a touch detection function are disclosed. The display panel with a touch detection function includes: one or more display elements; one or more drive electrodes; one or more touch detection electrodes; and a drive section selectively applying a DC drive signal or an AC drive signal to the drive electrodes.Type: ApplicationFiled: February 17, 2022Publication date: June 2, 2022Inventors: Hiroshi Mizuhashi, Yoshitoshi Kida, Koji Noguchi
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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: 20220164055Abstract: There are provided a display panel with a touch detection function, a drive circuit, and an electronic unit, which make it possible to realize many functions related to touch detection. The display panel includes: one or more display elements; one or more drive electrodes extending in one direction; an electrode drive section integrated into a chip, and applying a drive signal to the drive electrodes; and one or more touch detection electrodes extending in a direction intersecting the direction in which the drive electrodes extend.Type: ApplicationFiled: February 8, 2022Publication date: May 26, 2022Inventors: Yoshitoshi KIDA, Koji NOGUCHI, Hiroshi MIZUHASHI, Kohei AZUMI
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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: 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