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: 11287916Abstract: 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: GrantFiled: March 17, 2021Date of Patent: March 29, 2022Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Yoshitoshi Kida, Koji Noguchi
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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: 11281319Abstract: 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: GrantFiled: December 6, 2019Date of Patent: March 22, 2022Assignee: Japan Display Inc.Inventors: Yoshitoshi Kida, Koji Noguchi, Hiroshi Mizuhashi, Kohei Azumi
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Patent number: 11269226Abstract: 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: GrantFiled: September 17, 2020Date of Patent: March 8, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi
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Patent number: 11243628Abstract: According to one embodiment, a sensor-equipped display device includes first electrodes and a detection electrode. The first electrodes constitute sensor drive electrodes by being supplied with sensor drive signals separately and sequentially or sensor drive electrodes by simultaneously supplying the sensor drive signals to the first electrodes adjacent to each other. A width of the sensor drive electrode including the first electrode on the edge is smaller than a width of the other sensor drive electrode not including the first electrode on the edge.Type: GrantFiled: September 10, 2020Date of Patent: February 8, 2022Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Yasuyuki Teranishi, Hiroshi Mizuhashi, Koji Ishizaki, Daisuke Ito
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Patent number: 11169639Abstract: A display device is provided and includes a substrate; pixel electrode on the substrate; a signal line coupled to the pixel electrode; a plurality of drive electrodes including a first drive electrode overlapping the signal line; a drive signal line configured to supply a drive signal to the first drive electrode; and a drive electrode switch connecting the drive signal line and the first drive electrode, wherein during a touch detection period, the drive electrode switch is closed to apply the drive signal to the first drive electrode.Type: GrantFiled: December 22, 2020Date of Patent: November 9, 2021Assignee: Japan Display Inc.Inventors: Yoshitoshi Kida, Koji Noguchi, Yasuyuki Teranishi, Hiroshi Mizuhashi, Kohei Azumi
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Publication number: 20210318772Abstract: 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: ApplicationFiled: June 23, 2021Publication date: October 14, 2021Inventors: Hiroshi MIZUHASHI, Hayato Kurasawa, Yoshitoshi Kida, Toshinori Uehara, Takayuki Nakanishi
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Patent number: 11126287Abstract: A display device includes a substrate, first electrodes, pixel electrodes, a display functional layer, common electrodes, second electrodes stacked in this order. The display device further includes lines that are provided between the substrate and the display functional layer and intersect with the first electrodes in the plan view. In response to a control signal from a controller, the pixel electrodes are supplied with a pixel signal through the lines, and the common electrodes are supplied with a common signal in the display periods; either of the lines and the first electrodes are supplied with a first drive signal to generate a magnetic field, and the other thereof generate an electromotive force caused by the magnetic field in the first sensing period; the common electrodes are supplied with a second drive signal to generate electrostatic capacitance between the common electrodes and the second electrodes in the second sensing period.Type: GrantFiled: May 23, 2018Date of Patent: September 21, 2021Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Tadayoshi Katsuta
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Publication number: 20210278950Abstract: 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: ApplicationFiled: May 11, 2021Publication date: September 9, 2021Inventors: Hayato Kurasawa, Shoji Hinata, Toshinori Uehara, Hiroshi Mizuhashi, Yuji Suzuki, Yasuhiro Kanaya
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Patent number: 11106301Abstract: A display device includes first electrodes, second electrodes, lines, and a controller, and includes a substrate, pixel electrodes, a display functional layer, and a common electrode stacked in this order. An insulating layer is between the common electrode and the first and second electrodes. The controller controls the pixel electrodes, the common electrode, the lines, and the first and second electrodes. During a display period, the pixel electrodes are supplied with a pixel signal through the lines, and the common electrode is supplied with a common signal. During a first sensing period, the lines are supplied with a first drive signal to generate a magnetic field. During a second sensing period, the lines are supplied with the first drive signal to generate the magnetic field, and an electromotive force corresponding to a distance between the lines and the first electrodes is generated in the first electrodes by the magnetic field.Type: GrantFiled: March 18, 2020Date of Patent: August 31, 2021Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Tadayoshi Katsuta
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Publication number: 20210256238Abstract: A sensor is provided and includes a first control line; a first signal line; a first auxiliary line; a first detection electrode; a first detection switch connected to the first detection electrode, the first control line and the first signal line; and a first shielding electrode connected to the first auxiliary line, wherein the first shielding electrode is located to overlap the first signal line via an insulating film.Type: ApplicationFiled: March 31, 2021Publication date: August 19, 2021Inventors: Hiroshi MIZUHASHI, Gen KOIDE, Hayato KURASAWA, Toshio SOYA, Fumitaka GOTOH
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Patent number: 11073930Abstract: 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: January 14, 2020Date of Patent: July 27, 2021Assignee: Japan Display Inc.Inventors: Hiroshi Mizuhashi, Hayato Kurasawa, Yoshitoshi Kida, Toshinori Uehara, Takayuki Nakanishi
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Publication number: 20210200369Abstract: 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: March 17, 2021Publication date: July 1, 2021Inventors: Hiroshi Mizuhashi, Yoshitoshi Kida, Koji Noguchi
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Publication number: 20210182522Abstract: 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: ApplicationFiled: February 26, 2021Publication date: June 17, 2021Inventors: Fumihito SHIBANO, Hiroshi MIZUHASHI, Toshinori UEHARA, Kimiyo NONOYAMA, Hayato KURASAWA
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Patent number: 11036332Abstract: 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: March 24, 2020Date of Patent: June 15, 2021Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Shoji Hinata, Toshinori Uehara, Hiroshi Mizuhashi, Yuji Suzuki, Yasuhiro Kanaya
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Publication number: 20210173545Abstract: 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: February 23, 2021Publication date: June 10, 2021Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI, Fumitaka GOTOH, Gen KOIDE, Tadayoshi KATSUTA
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Publication number: 20210173245Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixel electrodes provided in a display area; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of first electrodes provided between semiconductors of the switching elements and the substrate in a direction orthogonal to the substrate and extending in a first direction; a plurality of signal lines coupled to the switching elements and extending in a second direction intersecting 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 to the first electrodes or the signal lines during a first sensing period in which an electromagnetic induction method is used.Type: ApplicationFiled: February 22, 2021Publication date: June 10, 2021Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Fumitaka Gotoh, Gen Koide, Tadayoshi Katsuta
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Patent number: 10998347Abstract: A semiconductor device including: one or more pieces of first wiring having a main wiring section and a bifurcation wiring section; one or a plurality of pieces of second wiring having a trunk wiring section and a plurality of branch wiring sections within a gap region between the main wiring section and the bifurcation wiring section; one or a plurality of transistors each divided and formed into a plurality of pieces, the plurality of branch wiring sections individually functioning as a gate electrode and the one or plurality of transistors having a source region formed within the main wiring section and within the bifurcation wiring section and having a drain region formed between the plurality of branch wiring sections; and one or a plurality of pieces of third wiring electrically connected to the drain region of the one or plurality of transistors.Type: GrantFiled: May 28, 2020Date of Patent: May 4, 2021Assignee: JAPAN DISPLAY INC.Inventors: Mitsufumi Sogabe, Masaki Murase, Hiroshi Mizuhashi
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Patent number: 10996783Abstract: A display device with a touch sensor is provided and includes a substrate; pixel electrodes on the substrate; thin film transistors (TFTs) coupled to the pixel electrodes; touch sensor electrodes arranged opposite to the pixel electrodes; a gate buffer coupled to the TFTs; a first switch coupled to the gate buffer; first-L and first-H lines coupled to the first switch; a second line coupled to the gate buffer; and a drive control circuit applying a drive signal to the touch sensor electrodes, wherein a signal supplied to the TFTs is one of a pulse wave signal and a signal in which different three potentials are switched at given timings, wherein three potentials include a first potential supplied through the first-L line, a second potential supplied through the second line, and a third potential supplied through first-H line, wherein the first switch switches to couple the gate buffer with first-L line and first-H line in synchronization with the drive signal in which a first and second common potential are rType: GrantFiled: March 11, 2020Date of Patent: May 4, 2021Assignee: Japan Display Inc.Inventors: Takeya Takeuchi, Hiroshi Mizuhashi, Tadayoshi Katsuta, Takehiro Shima
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Publication number: 20210124450Abstract: 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: ApplicationFiled: December 31, 2020Publication date: April 29, 2021Inventors: Tadayoshi KATSUTA, Hiroshi MIZUHASHI