Patents by Inventor Kohei Azumi
Kohei Azumi 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: 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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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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Publication number: 20220043536Abstract: A noise immunity of a detected capacitance is prevented or inhibited from lowering on a driving electrode different in width from the other driving electrodes, provided in an input device. A touch panel serving as an input device has a plurality of driving electrodes extending in an X-axis direction and arranged in a Y-axis direction intersecting with the X-axis direction, and a driving electrode arranged outside one side of an arrangement of the driving electrodes and extending in the X-axis direction. Further, the touch panel TP1 has a plurality of detecting electrodes extending in the Y-axis direction and arranged in the X-axis direction. The width of the driving electrode is smaller than the widths of the driving electrodes and the detecting electrode includes an expanding portion for expanding the area of the detecting electrode on the side opposite to the plurality of driving electrodes via the driving electrode.Type: ApplicationFiled: October 22, 2021Publication date: February 10, 2022Inventors: Yasuyuki TERANISHI, Takafumi SUZUKI, Kohei AZUMI
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Patent number: 11194421Abstract: According to an aspect, a detection device includes at least a first touch detection period, in which first touch detection is performed, and a fingerprint detection period, in which fingerprint detection is performed. In the first touch detection period, a plurality of second electrodes in a second detection area in a first detection area are simultaneously selected, a plurality of first electrodes in the first detection area are simultaneously selected, and a first detection signal corresponding to a capacitance change between first electrodes and second electrodes are sequentially output. In the fingerprint detection period, the second electrodes in a plurality of divided areas obtained by dividing a second detection area are sequentially selected, the first electrodes in the divided areas are sequentially selected, and a second detection signal corresponding to a capacitance change between the first electrodes and the second electrodes is output.Type: GrantFiled: March 25, 2020Date of Patent: December 7, 2021Assignee: Japan Display Inc.Inventors: Kohei Azumi, Toshinori Uehara
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Patent number: 11182034Abstract: A noise immunity of a detected capacitance is prevented or inhibited from lowering on a driving electrode different in width from the other driving electrodes, provided in an input device. A touch panel serving as an input device has a plurality of driving electrodes extending in an X-axis direction and arranged in a Y-axis direction intersecting with the X-axis direction, and a driving electrode arranged outside one side of an arrangement of the driving electrodes and extending in the X-axis direction. Further, the touch panel TP1 has a plurality of detecting electrodes extending in the Y-axis direction and arranged in the X-axis direction. The width of the driving electrode is smaller than the widths of the driving electrodes and the detecting electrode includes an expanding portion for expanding the area of the detecting electrode on the side opposite to the plurality of driving electrodes via the driving electrode.Type: GrantFiled: September 14, 2020Date of Patent: November 23, 2021Assignee: Japan Display Inc.Inventors: Yasuyuki Teranishi, Takafumi Suzuki, Kohei Azumi
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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: 20210271337Abstract: A display device is provided and includes scanning and signal lines; switch electrically coupled to scanning and signal lines; pixel electrode electrically coupled to switch and opposed to drive electrode; first and second display periods, and detection period between first and second display periods, wherein during first and second display periods, common voltage is applied to drive electrode, scanning signal is applied to scanning line and switch, pixel signal is applied to pixel electrode through signal line and switch, during detection period, AC drive signal or pulse drive signal is applied to drive electrode, and scanning signal is not applied to scanning line.Type: ApplicationFiled: May 17, 2021Publication date: September 2, 2021Inventors: Koji Noguchi, Yoshitoshi Kida, Kohei Azumi
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Patent number: 11106300Abstract: A display device according to an aspect of the present invention includes a display panel, a driver IC configured to perform image display on the display panel, and a plurality of touch ICs. One of the touch ICs is configured to be driven based on a synchronization signal that is output from the driver IC, and output a synchronization signal for another touch IC. The other touch IC is configured to be driven based on a synchronization signal that is output from the one touch IC.Type: GrantFiled: August 8, 2019Date of Patent: August 31, 2021Assignee: Japan Display Inc.Inventors: Satoshi Uchino, Kohei Azumi
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Publication number: 20210208720Abstract: 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: ApplicationFiled: March 22, 2021Publication date: July 8, 2021Inventors: Koji ISHIZAKI, Hayato KURASAWA, Kohei AZUMI
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Patent number: 11009984Abstract: A display device is provided and includes scanning signal lines including a first scanning signal line; pixel signal lines including a first pixel signal line; switch elements including a first switch being electrically coupled to the first scanning signal line and the pixel signal line; pixel electrodes including a first pixel electrode being electrically coupled to the first switch element; drive electrodes including a first drive electrode opposed to the first pixel electrode; a driver configured to drive the scanning signal lines, the pixel signal lines, and the drive electrodes; and a controller configured to control the driver in a frame.Type: GrantFiled: September 6, 2019Date of Patent: May 18, 2021Assignee: Japan Display Inc.Inventors: Koji Noguchi, Yoshitoshi Kida, Kohei Azumi
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Patent number: 10996784Abstract: 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 23, 2020Date of Patent: May 4, 2021Assignee: Japan Display Inc.Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
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Publication number: 20210109614Abstract: 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: ApplicationFiled: December 22, 2020Publication date: April 15, 2021Inventors: Yoshitoshi KIDA, Koji NOGUCHI, Yasuyuki TERANISHI, Hiroshi MIZUHASHI, Kohei AZUMI
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Publication number: 20210041975Abstract: A display device according to an aspect of the present invention includes a display panel, a driver IC configured to perform image display on the display panel, and a plurality of touch ICs. One of the touch ICs is configured to be driven based on a synchronization signal that is output from the driver IC, and output a synchronization signal for another touch IC. The other touch IC is configured to be driven based on a synchronization signal that is output from the one touch IC.Type: ApplicationFiled: August 8, 2019Publication date: February 11, 2021Applicant: Japan Display Inc.Inventors: Satoshi UCHINO, Kohei AZUMI
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Publication number: 20200409504Abstract: A display device is provided and includes a first substrate; a second substrate opposed to the first substrate; a liquid crystal layer between the first substrate and the second substrate; a plurality of detection electrodes, the second substrate being located between the detection electrodes and the liquid crystal layer; a shield electrode apart from the detection electrodes in a plane view, the second substrate being located between the shield electrode and the liquid crystal layer; and a resistive layer overlapping the detection electrodes and the shield electrode, the detection electrodes and the shield electrode located between the resistive layer and the second substrate.Type: ApplicationFiled: September 11, 2020Publication date: December 31, 2020Inventors: Hayato KURASAWA, Koji ISHIZAKI, Kohei AZUMI
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Publication number: 20200409505Abstract: A noise immunity of a detected capacitance is prevented or inhibited from lowering on a driving electrode different in width from the other driving electrodes, provided in an input device. A touch panel serving as an input device has a plurality of driving electrodes extending in an X-axis direction and arranged in a Y-axis direction intersecting with the X-axis direction, and a driving electrode arranged outside one side of an arrangement of the driving electrodes and extending in the X-axis direction. Further, the touch panel TP1 has a plurality of detecting electrodes extending in the Y-axis direction and arranged in the X-axis direction. The width of the driving electrode is smaller than the widths of the driving electrodes and the detecting electrode includes an expanding portion for expanding the area of the detecting electrode on the side opposite to the plurality of driving electrodes via the driving electrode.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Inventors: Yasuyuki TERANISHI, Takafumi SUZUKI, Kohei AZUMI
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Patent number: 10877611Abstract: According to an aspect, a display device with a touch detection function includes a plurality of drive electrodes that face a plurality of pixel electrodes in an orthogonal direction to the surface of the substrate, and extend in a direction parallel to the direction in which a plurality of signal lines extend. The display device with a touch detection function also includes a scan driving unit that applies a touch drive signal to a signal line that faces, in an overlapping manner in the orthogonal direction, a drive electrode to which the touch drive signal is applied.Type: GrantFiled: October 18, 2018Date of Patent: December 29, 2020Assignee: Japan Display Inc.Inventors: Yoshitoshi Kida, Koji Noguchi, Yasuyuki Teranishi, Hiroshi Mizuhashi, Kohei Azumi
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Publication number: 20200333911Abstract: 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: ApplicationFiled: July 1, 2020Publication date: October 22, 2020Inventors: Hayato KURASAWA, Kohei AZUMI, Koji ISHIZAKI, Hideki KANEKO, Tsutomu HARADA
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Patent number: 10809852Abstract: A noise immunity of a detected capacitance is prevented or inhibited from lowering on a driving electrode different in width from the other driving electrodes, provided in an input device. A touch panel serving as an input device has a plurality of driving electrodes extending in an X-axis direction and arranged in a Y-axis direction intersecting with the X-axis direction, and a driving electrode arranged outside one side of an arrangement of the driving electrodes and extending in the X-axis direction. Further, the touch panel TP1 has a plurality of detecting electrodes extending in the Y-axis direction and arranged in the X-axis direction. The width of the driving electrode is smaller than the widths of the driving electrodes and the detecting electrode includes an expanding portion for expanding the area of the detecting electrode on the side opposite to the plurality of driving electrodes via the driving electrode.Type: GrantFiled: September 17, 2019Date of Patent: October 20, 2020Assignee: Japan Display Inc.Inventors: Yasuyuki Teranishi, Takafumi Suzuki, Kohei Azumi
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Publication number: 20200310618Abstract: According to an aspect, a detection device includes at least a first touch detection period, in which first touch detection is performed, and a fingerprint detection period, in which fingerprint detection is performed. In the first touch detection period, a plurality of second electrodes in a second detection area in a first detection area are simultaneously selected, a plurality of first electrodes in the first detection area are simultaneously selected, and a first detection signal corresponding to a capacitance change between first electrodes and second electrodes are sequentially output. In the fingerprint detection period, the second electrodes in a plurality of divided areas obtained by dividing a second detection area are sequentially selected, the first electrodes in the divided areas are sequentially selected, and a second detection signal corresponding to a capacitance change between the first electrodes and the second electrodes is output.Type: ApplicationFiled: March 25, 2020Publication date: October 1, 2020Inventors: Kohei AZUMI, Toshinori UEHARA
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Patent number: 10775923Abstract: A display device includes: a display layer; plural first electrodes formed to be arranged above the display layer; a shield electrode formed apart from the plural first electrodes so as to surround the whole plural first electrodes along an arrangement surface; an insulating layer; and a semiconductive layer formed opposite to the first electrodes and the shield electrode so as to sandwich the insulating layer, wherein the difference between an average potential of the first electrodes and an average potential of the shield electrode is equal to or less than 0.5V.Type: GrantFiled: March 22, 2019Date of Patent: September 15, 2020Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Koji Ishizaki, Kohei Azumi