Patents by Inventor Hirotoshi Yasunaga

Hirotoshi Yasunaga 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).

  • Patent number: 11137640
    Abstract: A lighting device includes a mounting substrate comprising a first pair of conductive pads and a second pair of conductive pads arranged along a first direction on the mounting substrate. The first pair of conductive pads is offset from the second pair of conductive pads in the first direction and a second direction intersecting the first direction with respect to a plane parallel to the mounting substrate. A first light emitting device is coupled to the first pair of conductive pads, and configured to emit lights toward a first side within a space formed between the mounting substrate and a diffusion plate. A second light emitting device is coupled to the second pair of conductive pads, and configured to emit lights toward a second side opposite of the first side within the space formed between the substrate and the diffusion plate.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: October 5, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Masuda, Hisashi Watanabe, Youzou Kyoukane, Hirotoshi Yasunaga
  • Publication number: 20210288234
    Abstract: A light-emitting-element-equipped substrate includes: a circuit substrate including a main surface; a light-emitting element mounted on the main surface and electrically connected to the circuit substrate; a silicone-based white resist layer covering the main surface and including: a first opening surrounding the light-emitting element; and a second opening different from the first opening; and a transparent protective layer covering the light-emitting element, the silicone-based white resist layer, and the second opening.
    Type: Application
    Filed: March 5, 2021
    Publication date: September 16, 2021
    Inventors: HISASHI WATANABE, HIROTOSHI YASUNAGA, YOUZOU KYOUKANE, TAKESHI MASUDA
  • Patent number: 11105972
    Abstract: The light input efficiency of a light-emitting device into a circular disc-shaped or elliptical disc-shaped light guide plate is increased. A light-emitting device includes a first light-emitting unit (12a) that includes a plurality of light-emitting elements (L1 to L5) arranged curvilinearly, a second light-emitting unit (12b) that includes a plurality of light-emitting elements (L6 to L10) arranged curvilinearly, and a coupling portion (12c) that is disposed so as to coincide with a region (SA) sandwiched by the first and second light-emitting units and couples the first and second light-emitting units.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: August 31, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Youzou Kyoukane, Hisashi Watanabe, Hirotoshi Yasunaga, Ryuzo Yuki
  • Publication number: 20210247647
    Abstract: A lighting device includes a mounting substrate comprising a first pair of conductive pads and a second pair of conductive pads arranged along a first direction on the mounting substrate. The first pair of conductive pads is offset from the second pair of conductive pads in the first direction and a second direction intersecting the first direction with respect to a plane parallel to the mounting substrate. A first light emitting device is coupled to the first pair of conductive pads, and configured to emit lights toward a first side within a space formed between the mounting substrate and a diffusion plate. A second light emitting device is coupled to the second pair of conductive pads, and configured to emit lights toward a second side opposite of the first side within the space formed between the substrate and the diffusion plate.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 12, 2021
    Inventors: TAKESHI MASUDA, HISASHI WATANABE, YOUZOU KYOUKANE, HIROTOSHI YASUNAGA
  • Patent number: 11079625
    Abstract: A reflection sheet stacked on a mounting surface of a light source substrate on which light sources are mounted includes an insulating sheet and a reflection layer. The insulating sheet is made of an insulating material. The reflection layer includes a metal thin film stacked on the insulating sheet. Holes are drilled through the reflection layer and the insulating sheet in a stacking direction in which the reflection layer is stacked on the insulating sheet so that the light sources are exposed therethrough. The reflection layer is divided into divided reflection areas by slits. The holes are formed in the divided reflection areas, respectively.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: August 3, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane, Takeshi Masuda
  • Patent number: 11067739
    Abstract: Provided are an edge-lit surface light source device and a liquid crystal display device, both of which are capable of two-dimensional local dimming without image contrast being reduced due to stray light. Even when light from LEDs that should be extracted by means of a light extraction pattern provided in a first section of a light guide plate is passed through the first section without being extracted, the light repeatedly strikes on a light absorbing layer formed in a second section, whereby much of the light is absorbed in the second section. Accordingly, little light from the LEDs is extracted from a third section, from which light from LEDs should originally be extracted, with the result that image contrast can be prevented from being reduced due to stray light.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: July 20, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hirotoshi Yasunaga, Hisashi Watanabe
  • Patent number: 11016239
    Abstract: A lighting device includes light guide plates each of which includes a light exit section including a light it surface and a light entering section extending from the light exit section toward a light source row and including an extended end surface as a light entering surface. The light exit section has a thickness dimension that is smaller than that of the light entering section at an extended end thereof. The light guide plates are stacked on each other such that the light exit sections thereof overlap each other seen from a normal direction of the light exit surface. The light entering section of one light guide plate and the light entering section of another light guide plate are disposed next to each other in an arrangement direction of the light sources so as not to overlap each other seen from the normal direction of light exit surface.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: May 25, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane
  • Publication number: 20210141147
    Abstract: Provided are an edge-lit surface light source device and a liquid crystal display device, both of which are capable of two-dimensional local dimming without image contrast being reduced due to stray light. Even when light from LEDs that should be extracted by means of a light extraction pattern provided in a first section of a light guide plate is passed through the first section without being extracted, the light repeatedly strikes on a light absorbing layer formed in a second section, whereby much of the light is absorbed in the second section. Accordingly, little light from the LEDs is extracted from a third section, from which light from LEDs should originally be extracted, with the result that image contrast can be prevented from being reduced due to stray light.
    Type: Application
    Filed: September 19, 2017
    Publication date: May 13, 2021
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: HIROTOSHI YASUNAGA, HISASHI WATANABE
  • Publication number: 20210141148
    Abstract: A lighting device includes light guide plates each of which includes a light exit section including a light exit surface and a light entering section extending from the light exit section toward a light source row and including an extended end surface as a light entering surface. The light exit section has a thickness dimension that is smaller than that of the light entering section at an extended end thereof. The light guide plates are stacked on each other such that the light exit sections thereof overlap each other seen from a normal direction of the light exit surface. The light entering section of one light guide plate and the light entering section of another light guide plate are disposed next to each other in an arrangement direction of the light sources so as not to overlap each other seen from the normal direction of light exit surface.
    Type: Application
    Filed: February 15, 2018
    Publication date: May 13, 2021
    Inventors: HISASHI WATANABE, HIROTOSHI YASUNAGA, YOUZOU KYOUKANE
  • Publication number: 20210135066
    Abstract: A lighting device includes a circuit substrate that includes a wiring circuit, LEDs that are mounted on the circuit substrate and that emit primary light, a phosphor sheet that faces a light emission surface of each of the LEDs and that has a function of converting part of the primary light into secondary light in another wavelength range that differs from the wavelength range, and a selective reflection layer that is composed of dielectric multilayer film, that is disposed between the phosphor sheet and the LEDs, that covers the light emission surface of each of the LEDs, that allows the part of the primary light to be transmitted therethrough, and that reflects part of the secondary light. The selective reflection layer is disposed so as to have convex shapes projecting in a direction opposite a direction toward the circuit substrate in regions that overlap the LEDs.
    Type: Application
    Filed: October 30, 2020
    Publication date: May 6, 2021
    Inventors: HISASHI WATANABE, HIROTOSHI YASUNAGA, YOUZOU KYOUKANE, TAKESHI MASUDA
  • Patent number: 10976619
    Abstract: A backlight device (illumination device) is provided with LEDs (light sources) and a light-controlling sheet (light-controlling member) that is arranged at the exit side of the outgoing-light path of the LEDs. The light-controlling sheet has a light-transmitting layer that transmits light, first light-shielding sections that are arranged at the LED side of the light-transmitting layer, and a second light-shielding section that is arranged at the opposite side to the first light-shielding section side of the light-transmitting layer. The first light-shielding sections and the second light-shielding section are repeatedly arranged side-by-side in an alternating manner.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: April 13, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane, Takeshi Masuda
  • Patent number: 10962828
    Abstract: [Object] To provide an illumination device that suppresses degradation of display quality by preventing damage of light source elements, a reflection sheet, and an optical sheet; and a display. [Solution] A backlight device 10 includes: an LED substrate 11; a plurality of LEDs 15 disposed adjacent to each other on the LED substrate 11; an optical member 24 disposed to face the LEDs 15; a reflection sheet 12 disposed on the LED substrate 11 and having a plurality of openings at which the LEDs 15 are disposed; and a support body 17 formed at least in a gap between the reflection sheet 12 and the LEDs 15, at at least one of the plurality of openings, the support body 17 projecting further than the LEDs 15 on a side opposite to the LED substrate 11 and supporting the optical member 24.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: March 30, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Youzou Kyoukane, Takeshi Masuda, Hisashi Watanabe, Hirotoshi Yasunaga
  • Patent number: 10871607
    Abstract: A lighting device includes light sources arranged in a row direction and a column direction, and a reflector through which at least a part of light rays emitted by the light source. The reflector includes unit light source regions disposed at an interval from the light sources, a light reflecting pattern disposed in the unit light source regions and reflecting light, and a light transmitting pattern disposed in the unit light source regions and transmissive to the part of the light rays. The unit light source regions are disposed such that the unit light source regions adjacent to each other with respect to at least one of the row direction and the column direction have different distributions of at least one of the light reflecting pattern and the light transmitting pattern.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: December 22, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hirotoshi Yasunaga, Hisashi Watanabe, Youzou Kyoukane
  • Patent number: 10852583
    Abstract: A lighting device includes light sources, a light source substrate, and a reflection sheet. The light source substrate includes a plate-shaped base including a mounting surface on which mounting portions are formed. The light sources are mounted on the mounting portions with solders. The reflection sheet includes an insulating sheet, a reflection layer, and holes. The reflection layer includes a metal thin film stacked on the insulating sheet. The holes are drilled through the reflection layer and the insulating sheet at positions corresponding to the light sources so that the light sources are exposed through the holes. The light source substrate and the reflection sheet are bonded together with an adhesive layer. The insulating sheet is made of a material having a heat resistance higher than a melting temperature of the solders and an elastic modulus lower than that of the base of the light source substrate.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: December 1, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane, Takeshi Masuda
  • Publication number: 20200357847
    Abstract: A light emitting diode (LED) light source substrate includes a substrate, a plurality of LEDs of a flip-chip type, a bonding sheet, a plurality of reflective layers, and a substrate reflective layer, formed on the substrate, configured to reflect a first light that passes between the plurality of reflective layers and is incident on the bonding sheet. A reflectivity of the substrate reflective layer configured to reflect the first light is substantially equal to a reflectivity of the plurality of reflective layers configured to reflect a second light incident on the plurality of reflective layers from a side opposite to the substrate.
    Type: Application
    Filed: April 29, 2020
    Publication date: November 12, 2020
    Inventors: HISASHI WATANABE, TAKESHI MASUDA, HIROTOSHI YASUNAGA, YOUZOU KYOUKANE
  • Publication number: 20200343406
    Abstract: An LED light-source substrate includes a first bonding sheet covering the LED, a second bonding sheet formed on the first bonding sheet, and a reflective layer formed on the second bonding sheet to suppress light from the LED. The second bonding sheet is bonded peelably from the first bonding sheet.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 29, 2020
    Inventors: HISASHI WATANABE, TAKESHI MASUDA, HIROTOSHI YASUNAGA, YOUZOU KYOUKANE
  • Patent number: 10809571
    Abstract: A lighting device includes a casing, a light source, a light-collecting member, and a reflection member. The casing includes a light exiting portion. The light source is accommodated within the casing. The light-collecting member disposed in the light exiting portion. The light-collecting member includes unit light collectors each having long dimensions in a first direction and being arranged in a second direction perpendicular to the first direction. The reflecting member is disposed adjacent to the light source with respect to the light-collecting member in the light exiting portion. The reflecting member includes a light reflective portion and a light transmissive portion. The reflecting member includes a light source arrangement area including a section overlapping the light source. The light source arrangement area includes the light reflective portion with an area ratio larger than an area ratio of a light source non-arrangement area around the light reflective portion.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: October 20, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane
  • Publication number: 20200326470
    Abstract: The light input efficiency of a light-emitting device into a circular disc-shaped or elliptical disc-shaped light guide plate is increased. A light-emitting device includes a first light-emitting unit (12a) that includes a plurality of light-emitting elements (L1 to L5) arranged curvilinearly, a second light-emitting unit (12b) that includes a plurality of light-emitting elements (L6 to L10) arranged curvilinearly, and a coupling portion (12c) that is disposed so as to coincide with a region (SA) sandwiched by the first and second light-emitting units and couples the first and second light-emitting units.
    Type: Application
    Filed: August 7, 2017
    Publication date: October 15, 2020
    Inventors: Youzou KYOUKANE, Hisashi WATANABE, Hirotoshi YASUNAGA, Ryuzo YUKI
  • Patent number: 10754190
    Abstract: A lighting device includes a substrate and light sources that are top-emitting light sources. The substrate includes a first plate surface and a second plate surface. The light sources include first electrodes and second electrodes. A reflection layer made of metal, an insulating layer, and a first conductive pattern are formed on the first plate surface in this sequence from a lower layer side. A second conductive pattern is formed on the second plate surface. The light sources are disposed on the first plate surface with the first electrodes and the second electrodes electrically connected to the first conductive pattern and at least the first electrodes or the second electrodes electrically connected to the second conductive pattern via holes in the substrate. The reflection layer is divided into divided reflection areas by slits. The holes are formed in the divided reflection areas, respectively.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: August 25, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Youzou Kyoukane, Takeshi Masuda
  • Patent number: 10754195
    Abstract: The lighting device includes a light source, a light transmissive plate opposed to the light source, a light reflecting portion disposed on the light transmissive plate and providing at least transmitted light with a specific tint, and a coloring portion disposed on the light source and/or the light transmissive plate. The light transmissive plate includes a light source overlapping region and a light source peripheral region. The light reflecting portion is disposed with a higher distribution density in the light source overlapping region than in the light source peripheral region. The coloring portion colors light travelling from the light source toward the light source overlapping region with a tint having a complementary relationship with the specific tint, or colors light travelling from the light source toward the light source peripheral region with a tint having a corresponding or similar color relationship with the specific tint.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: August 25, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hirotoshi Yasunaga, Hisashi Watanabe, Youzou Kyoukane