Patents by Inventor Hirofumi Ohira
Hirofumi Ohira 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: 11874570Abstract: According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer which adheres the first and second display panels. The first display panel includes a first scanning line, a first signal line, a first pixel electrically connected to the first scanning line and the first signal line, and the first pixel includes a first pixel electrode including first line portions extending parallel to the first signal line. The second display panel includes a second scanning line, a second signal line, and a second pixel electrically connected to the second scanning line and the second signal line, and the second pixel includes a second pixel electrode including second line portions intersecting the second signal line in plan view.Type: GrantFiled: March 16, 2023Date of Patent: January 16, 2024Assignee: Japan Display Inc.Inventors: Yosuke Hyodo, Shinichiro Oka, Hirofumi Ohira
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Publication number: 20240013737Abstract: According to an aspect, a display device includes: a display panel having a display area including pixels; a light source device configured to emit light from an emission area overlapping the display area toward the display panel; a dimming panel between the display panel and the light source device and configured to adjust brightness of emission light emitted from the emission area; and a drive circuit configured to drive the dimming panel. The emission area has a first emission area and a second emission area. The drive circuit is configured to, when gradation values of first pixels corresponding to the first emission area are equal to gradation values of second pixels corresponding to the second emission area, make transmittance of a second dimming area corresponding to the second pixels higher than that of a first dimming area corresponding to the first pixels in the dimming area.Type: ApplicationFiled: July 3, 2023Publication date: January 11, 2024Inventors: Takaya HIROSE, Hirofumi OHIRA, Makoto ISHIKAWA
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Publication number: 20240012302Abstract: A light adjustment device includes a panel unit including a plurality of light adjustment panels stacked in a first direction, each light adjustment panel including a first substrate, a second substrate, and a plurality of alignment marks provided at at least one of the first substrate and the second substrate.Type: ApplicationFiled: June 27, 2023Publication date: January 11, 2024Applicant: Japan Display Inc.Inventors: Masato YOSHIDA, Hirofumi OHIRA
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Publication number: 20230221603Abstract: According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer which adheres the first and second display panels. The first display panel includes a first scanning line, a first signal line, a first pixel electrically connected to the first scanning line and the first signal line, and the first pixel includes a first pixel electrode including first line portions extending parallel to the first signal line. The second display panel includes a second scanning line, a second signal line, and a second pixel electrically connected to the second scanning line and the second signal line, and the second pixel includes a second pixel electrode including second line portions intersecting the second signal line in plan view.Type: ApplicationFiled: March 16, 2023Publication date: July 13, 2023Applicant: Japan Display Inc.Inventors: Yosuke HYODO, Shinichiro OKA, Hirofumi OHIRA
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Patent number: 11668967Abstract: The display device includes a display panel and a front surface panel that is superimposed with the display panel, and that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted. The front surface panel can detect presence of an object to be detected.Type: GrantFiled: January 5, 2022Date of Patent: June 6, 2023Assignee: JAPAN DISPLAY INC.Inventors: Koji Yoshida, Hirofumi Ohira, Soichiro Ohama, Naoki Takada, Takayuki Nakanishi
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Patent number: 11630356Abstract: According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer which adheres the first and second display panels. The first display panel includes a first scanning line, a first signal line, a first pixel electrically connected to the first scanning line and the first signal line, and the first pixel includes a first pixel electrode including first line portions extending parallel to the first signal line. The second display panel includes a second scanning line, a second signal line, and a second pixel electrically connected to the second scanning line and the second signal line, and the second pixel includes a second pixel electrode including second line portions intersecting the second signal line in plan view.Type: GrantFiled: May 24, 2022Date of Patent: April 18, 2023Assignee: Japan Display Inc.Inventors: Yosuke Hyodo, Shinichiro Oka, Hirofumi Ohira
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Patent number: 11624958Abstract: A display device including optical sheet configured to transmit light linearly polarized in first polarization direction; first polarization member configured to absorb light linearly polarized in second polarization direction orthogonal to first polarization direction; front panel disposed between first polarization member and optical sheet, wherein optical sheet is disposed between front panel and display panel, and azimuth at which highest reflectance is obtained in reflective state in which incident light is reflected is azimuth at which highest transmittance is obtained in transmissive state in which incident light is transmitted.Type: GrantFiled: March 26, 2021Date of Patent: April 11, 2023Assignee: Japan Display Inc.Inventors: Hirofumi Ohira, Koji Yoshida
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Publication number: 20220397783Abstract: According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer which adheres the first and second display panels. The first display panel includes a first scanning line, a first signal line, a first pixel electrically connected to the first scanning line and the first signal line, and the first pixel includes a first pixel electrode including first line portions extending parallel to the first signal line. The second display panel includes a second scanning line, a second signal line, and a second pixel electrically connected to the second scanning line and the second signal line, and the second pixel includes a second pixel electrode including second line portions intersecting the second signal line in plan view.Type: ApplicationFiled: May 24, 2022Publication date: December 15, 2022Applicant: Japan Display Inc.Inventors: Yosuke HYODO, Shinichiro OKA, Hirofumi OHIRA
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Patent number: 11460727Abstract: According to an aspect, a display device includes: a substrate having a display region; a shield conductive layer provided above the substrate; and a plurality of wiring units for temperature detection disposed at positions overlapping with the display region and the shield conductive layer when seen in a plan view. Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire.Type: GrantFiled: July 22, 2021Date of Patent: October 4, 2022Assignee: Japan Display Inc.Inventors: Koji Yoshida, Hirofumi Ohira, Soichiro Ohama, Toshihiko Tanaka
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Patent number: 11402678Abstract: A display device comprising: a substrate having a display region; a plurality of temperature detection wires arranged at positions overlapping with the display region in plan view; and a light detection electrode overlapping with temperature detection regions of the temperature detection wires in plan view.Type: GrantFiled: September 1, 2020Date of Patent: August 2, 2022Assignee: Japan Display Inc.Inventors: Hirofumi Ohira, Koji Yoshida, Soichiro Ohama, Toshihiko Tanaka
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Publication number: 20220179268Abstract: According to an aspect, a display device includes: a substrate having a display region; and a plurality of temperature detection wiring lines each having a conductive thin wiring line arranged at a position overlapping with the display region in plan view. A light shielding layer is arranged so as to extend in a first direction in the display region, and the conductive thin wiring line is arranged at a position overlapping with the light shielding layer and extends in the first direction along the light shielding layer in plan view.Type: ApplicationFiled: February 28, 2022Publication date: June 9, 2022Applicant: Japan Display Inc.Inventors: Koji YOSHIDA, Hirofumi OHIRA, Soichiro OHAMA, Toshihiko TANAKA
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Patent number: 11340509Abstract: A display device includes a display panel, and a front panel overlapping with the display panel and being switched into a reflection state in which incident light is reflected and a transmission state in which incident light is transmitted. The front panel includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer sealed between the first substrate and the second substrate, a first translucent electrode provided on a side of the first substrate on which the liquid crystal layer is located, a second translucent electrode provided on a side of the second substrate on which the liquid crystal layer is located, a discharge resistor that is electrically coupled to the second translucent electrode and is provided on the second substrate, and a first conductive pillar that electrically couples the first translucent electrode and the discharge resistor.Type: GrantFiled: March 10, 2021Date of Patent: May 24, 2022Assignee: Japan Display Inc.Inventor: Hirofumi Ohira
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Publication number: 20220128852Abstract: The display device includes a display panel and a front surface panel that is superimposed with the display panel, and that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted. The front surface panel can detect presence of an object to be detected.Type: ApplicationFiled: January 5, 2022Publication date: April 28, 2022Applicant: Japan Display Inc.Inventors: Koji YOSHIDA, Hirofumi OHIRA, Soichiro OHAMA, Naoki TAKADA, Takayuki NAKANISHI
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Patent number: 11249335Abstract: The display device includes a display panel and a front surface panel that is superimposed with the display panel, and that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted. The front surface panel can detect presence of an object to be detected.Type: GrantFiled: February 4, 2021Date of Patent: February 15, 2022Assignee: JAPAN DISPLAY INC.Inventors: Koji Yoshida, Hirofumi Ohira, Soichiro Ohama, Naoki Takada, Takayuki Nakanishi
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Publication number: 20210405445Abstract: A display device includes a display panel, and a front panel overlapping with the display panel. The front panel includes a first substrate, and a second substrate located on an opposite side of the first substrate with respect to the display panel, the front panel has an active region capable of being switched between a display state in which an image is displayed and a reflection state in which a reflected image is provided, and a frame region around the active region, and a metal layer is arranged in the frame region of the second substrate.Type: ApplicationFiled: September 13, 2021Publication date: December 30, 2021Applicant: Japan Display Inc.Inventors: Hirofumi OHIRA, Koji YOSHIDA
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Patent number: 11199741Abstract: According to an aspect, a display device includes: a coated polarization layer configured to absorb light linearly polarized in a second polarization direction perpendicular to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the first polarization direction and transmit light linearly polarized in the second polarization direction; a front panel disposed between the coated polarization layer and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a polarization plate interposed therebetween, the polarization plate transmitting light linearly polarized in the second polarization direction to the optical sheet.Type: GrantFiled: August 17, 2020Date of Patent: December 14, 2021Assignee: Japan Display Inc.Inventors: Hirofumi Ohira, Koji Yoshida
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Publication number: 20210356803Abstract: According to an aspect, a display device includes: a substrate having a display region; a shield conductive layer provided above the substrate; and a plurality of wiring units for temperature detection disposed at positions overlapping with the display region and the shield conductive layer when seen in a plan view. Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire.Type: ApplicationFiled: July 22, 2021Publication date: November 18, 2021Inventors: Koji YOSHIDA, Hirofumi OHIRA, Soichiro OHAMA, Toshihiko TANAKA
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Patent number: 11073713Abstract: According to an aspect, a display device includes: a substrate having a display region; a shield conductive layer provided above the substrate; and a plurality of wiring units for temperature detection disposed at positions overlapping with the display region and the shield conductive layer when seen in a plan view. Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire.Type: GrantFiled: January 27, 2020Date of Patent: July 27, 2021Assignee: Japan Display Inc.Inventors: Koji Yoshida, Hirofumi Ohira, Soichiro Ohama, Toshihiko Tanaka
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Publication number: 20210215959Abstract: A display device including optical sheet configured to transmit light linearly polarized in first polarization direction; first polarization member configured to absorb light linearly polarized in second polarization direction orthogonal to first polarization direction; front panel disposed between first polarization member and optical sheet, wherein optical sheet is disposed between front panel and display panel, and azimuth at which highest reflectance is obtained in reflective state in which incident light is reflected is azimuth at which highest transmittance is obtained in transmissive state in which incident light is transmitted.Type: ApplicationFiled: March 26, 2021Publication date: July 15, 2021Inventors: Hirofumi OHIRA, Koji YOSHIDA
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Publication number: 20210199999Abstract: A display device includes a display panel, and a front panel overlapping with the display panel and being switched into a reflection state in which incident light is reflected and a transmission state in which incident light is transmitted. The front panel includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer sealed between the first substrate and the second substrate, a first translucent electrode provided on a side of the first substrate on which the liquid crystal layer is located, a second translucent electrode provided on a side of the second substrate on which the liquid crystal layer is located, a discharge resistor that is electrically coupled to the second translucent electrode and is provided on the second substrate, and a first conductive pillar that electrically couples the first translucent electrode and the discharge resistor.Type: ApplicationFiled: March 10, 2021Publication date: July 1, 2021Inventor: Hirofumi OHIRA