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: 10203442
    Abstract: A backlight unit includes side emitting-type LEDs, a light guide plate, and an LED board. The light guide plate includes a light entering end surface, a light exiting plate surface, and an opposite plate surface. The LED board includes a plate surface attached to an edge of the opposite plate surface. A gap in a range from 0.1 mm to 0.2 mm is provided between light emitting surfaces of the LEDs and the light entering end surface. The edge of each light emitting surface is at a position ?D1 mm inner than an edge of the light entering end surface with respect to a thickness direction of the light guide plate. An edge of each light emitting surface is at a position ?D2 mm inner than an edge of the light entering end surface. ?D1 and ?D2 satisfy relational expressions: ?D2??D1 and ?D2?0.1.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: February 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hisashi Watanabe, Hirotoshi Yasunaga, Ryuzo Yuki, Mitsuhiro Murata
  • Publication number: 20180321556
    Abstract: A backlight unit includes side emitting-type LEDs, a light guide plate, and an LED board. The light guide plate includes a light entering end surface, a light exiting plate surface, and an opposite plate surface. The LED board includes a plate surface attached to an edge of the opposite plate surface of the light guide plate. A gap is present between light emitting surfaces of the LEDs and the light entering end surface of the light guide plate. Each LED includes a light emitting surface having a dimension in the thickness direction of the light guide plate smaller than a dimension of the light entering end surface in the thickness direction. Each LED is disposed such that the center of the light emitting surface is opposed to the center of the light entering end surface.
    Type: Application
    Filed: October 21, 2016
    Publication date: November 8, 2018
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: HISASHI WATANABE, HIROTOSHI YASUNAGA, RYUZO YUKI, MITSUHIRO MURATA
  • Publication number: 20180313997
    Abstract: A backlight unit includes LEDs, a light guide plate, and a hood-shaped reflection member. The LEDs are linearly arranged at intervals. The light guide plate includes a light entering end surface and a light exiting plate surface. The light entering end surface is at least a part of the peripheral end surfaces extending along an arrangement direction of the LEDs and opposed to light emitting surfaces of the LEDs. The hood-shaped reflection member surrounds inter-LED spaces between adjacent LEDs and includes an opening a light guide plate side. The hood-shaped reflection member includes at least a first reflection portion and a pair of second reflection portions. The first reflection portion is opposed to the light entering end surface 15a. The second reflection portions are separated from each other in a thickness direction of the light guide plate such that the inter-LED spaces LS are between the second reflection portions.
    Type: Application
    Filed: October 26, 2016
    Publication date: November 1, 2018
    Inventors: MITSUHIRO MURATA, HISASHI WATANABE, HIROTOSHI YASUNAGA, RYUZO YUKI
  • Publication number: 20180306962
    Abstract: A backlight unit includes side emitting-type LEDs, a light guide plate, and an LED board. The light guide plate includes a light entering end surface, a light exiting plate surface, and an opposite plate surface. The LED board includes a plate surface attached to an edge of the opposite plate surface. A gap in a range from 0.1 mm to 0.2 mm is provided between light emitting surfaces of the LEDs and the light entering end surface. The edge of each light emitting surface is at a position ?D1 mm inner than an edge of the light entering end surface with respect to a thickness direction of the light guide plate. An edge of each light emitting surface is at a position ?D2 mm inner than an edge of the light entering end surface. ?D1 and ?D2 satisfy relational expressions: ?D2??D1 and ?D2?0.1.
    Type: Application
    Filed: October 21, 2016
    Publication date: October 25, 2018
    Inventors: HISASHI WATANABE, HIROTOSHI YASUNAGA, RYUZO YUKI, MITSUHIRO MURATA
  • Publication number: 20180274740
    Abstract: A backlight device includes LEDs, a light guide plate, an LED substrate, an optical sheet, and a low light-transmissive member. The light guide plate includes a light entering end surface, a light exiting plate surface, and an opposite plate surface. The LED substrate is disposed such that at least a section of the LED substrate overlaps a light entering-side edge section that is an edge section of the light guide plate on the light entering end surface side. The optical sheet includes a light entering-side edge section overlapping section disposed on the light exiting plate surface side of the light, guide plate to overlap the light entering-side edge section. The low light-transmissive member disposed on the light entering-side edge section overlapping section of the optical sheet. The low light-transmissive member has a light transmissivity lower than that of other sections of the optical sheet.
    Type: Application
    Filed: September 26, 2016
    Publication date: September 27, 2018
    Inventors: HISASHI WATANABE, RYUZO YUKI, HIROTOSHI YASUNAGA, MITSUHIRO MURATA, MAKOTO YOSHIMURA, HIROMI ENOMOTO
  • Patent number: 10061156
    Abstract: Provided is a technique for controlling the hue of an image when the image is displayed on a display panel so that the image should not be displayed with a hue different from the actual hue. The display device includes a display panel that includes an active matrix substrate 11a and a counter substrate 11b, and a reflection unit 12. The active matrix substrate 11a includes gate lines and source lines 24, and includes a plurality of pixel areas that are defined by the gate lines and the source lines 24. The counter substrate 11b includes color filters 31R, 31G, 31B of R, G, B at positions corresponding to the pixel areas. The reflection unit 12 transmits light from the light source 14, and reflects light from the active matrix substrate 11a. The pixel areas of R, G, B have reflection areas that reflect light from the reflection unit 12 so that the respective amounts of light outgoing from the above-described pixel areas are approximately uniform.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: August 28, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuhiro Murata, Takeshi Ishida, Ryuzo Yuki, Hirotoshi Yasunaga
  • Publication number: 20180239078
    Abstract: A lighting device includes a light guide plate, a first light source, a second light source, and a case. The light guide plate includes plate surfaces and an outer peripheral surface. One of the plate surfaces is configured as a light exiting surface. Sections of the outer peripheral surface on opposite sides from each other relative to the center of the light exiting surface are configured as a first light entering surface and a second light entering surface, respectively. The first light source is disposed opposite the first light entering surface. The second light source is disposed opposite the second light entering surface. The case includes an annular wall portion surrounding an outer circumference of the light guide plate, the first light source, and the second light source. The annular wall portion includes light source non-disposing areas between the first light entering surface and the second light entering surface.
    Type: Application
    Filed: September 8, 2016
    Publication date: August 23, 2018
    Inventors: Ryuzo YUKI, Katsutoshi KIKUCHI, Hayato NAKAMURA, Makoto YOSHIMURA, Hiromi ENOMOTO, Mitsuhiro MURATA, Hisashi WATANABE, Hirotoshi YASUNAGA
  • Publication number: 20180173058
    Abstract: A backlight device includes LEDs, a light guide plate, a LED board, and a bonding member. The light guide plate has a light entrance edge surface that is a part of peripheral edge surfaces thereof and through which light from the LED enters, a light exiting plate surface that is one of plate surfaces thereof and through which light exits, and another one of the plate surfaces as an opposite plate surface. The LED board has a mounting surface on which the LEDs are mounted, and has a part overlapping a part of the light guide plate on an opposite plate surface side. The bonding member is bonded to the mounting surface of the part of the LED board and to the opposite plate surface of the part of the light guide plate and the bonding member includes a light absorbing bonding layer containing light absorbing material.
    Type: Application
    Filed: June 10, 2016
    Publication date: June 21, 2018
    Inventors: Ryuzo YUKI, Mitsuhiro MURATA, Hisashi WATANABE, Hirotoshi YASUNAGA
  • Patent number: 9933563
    Abstract: A backlight unite 12 includes LEDs 17, an optical member 16, a positioning portion 23, and a rotation restricting portion 24. The optical member 16 includes at least a curved end surface 16C having a curved shape in a plan view included in a periphery of the optical member 16. The positioning portion 26 includes a positioning hole 25 that opens through a thickness direction of the optical member 16 and a positioning protrusion 26 that is inserted in the positioning hole 25 and is in contact with an inner wall of the positioning hole 25. The rotation restricting portion 24 includes an optical member recess 27 that is a portion of the periphery of the optical member 16 recessed along a circumferential direction and a contact portion 28 that is in contact with the optical member recess 27.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: April 3, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ryuzo Yuki, Takeshi Ishida, Mitsuhiro Murata, Hirotoshi Yasunaga
  • Patent number: 9778411
    Abstract: A backlight device 12 includes LEDs 17, an optical member 16 that applies optical effects to light from the LEDs 17 and has a through hole 23 that is through a thickness thereof, and a restricting member 26 having a communication hole 27 that is communicated with the through hole 23. The restricting member 26 is inserted in the through hole 23 to be in contact with an inner surface of the through hole 23 to restrict movement of the optical member 16 along a plate surface of the optical member 16.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: October 3, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ryuzo Yuki, Takeshi Ishida, Mitsuhiro Murata, Hirotoshi Yasunaga
  • Publication number: 20170261810
    Abstract: Provided is a technique for controlling the hue of an image when the image is displayed on a display panel so that the image should not be displayed with a hue different from the actual hue. The display device includes a display panel that includes an active matrix substrate 11a and a counter substrate 11b, and a reflection unit 12. The active matrix substrate 11a includes gate lines and source lines 24, and includes a plurality of pixel areas that are defined by the gate lines and the source lines 24. The counter substrate 11b includes color filters 31R, 31G, 31B of R, G, B at positions corresponding to the pixel areas. The reflection unit 12 transmits light from the light source 14, and reflects light from the active matrix substrate 11a. The pixel areas of R, G, B have reflection areas that reflect light from the reflection unit 12 so that the respective amounts of light outgoing from the above-described pixel areas are approximately uniform.
    Type: Application
    Filed: August 31, 2015
    Publication date: September 14, 2017
    Inventors: Mitsuhiro MURATA, Takeshi ISHIDA, Ryuzo YUKI, Hirotoshi YASUNAGA
  • Publication number: 20170090113
    Abstract: A backlight unite 12 includes LEDs 17, an optical member 16, a positioning portion 23, and a rotation restricting portion 24. The optical member 16 includes at least a curved end surface 16C having a curved shape in a plan view included in a periphery of the optical member 16. The positioning portion 26 includes a positioning hole 25 that opens through a thickness direction of the optical member 16 and a positioning protrusion 26 that is inserted in the positioning hole 25 and is in contact with an inner wall of the positioning hole 25. The rotation restricting portion 24 includes an optical member recess 27 that is a portion of the periphery of the optical member 16 recessed along a circumferential direction and a contact portion 28 that is in contact with the optical member recess 27.
    Type: Application
    Filed: May 15, 2015
    Publication date: March 30, 2017
    Inventors: Ryuzo YUKI, Takeshi ISHIDA, Mitsuhiro MURATA, Hirotoshi YASUNAGA
  • Publication number: 20170082789
    Abstract: An illumination device according to the present invention includes: a light source row in which a plurality of light sources are aligned in a row; a light guide plate that includes a plate-shaped main body with an end thereof facing the light source row, a light-receiving portion that is arranged on the end of the main body and into which light from the light sources enters, plate-shaped side extensions that are arranged on the sides of the main body and that extend outwards further than the light-receiving portion, and a light-exiting portion that is arranged on front surfaces of the main body and the side extensions and that allows light that enters via the light-receiving portion to exit; and a supply unit that supplies light to the side extensions.
    Type: Application
    Filed: May 15, 2015
    Publication date: March 23, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hirotoshi YASUNAGA, Takeshi ISHIDA, Mitsuhiro MURATA, Ryuzo YUKI
  • Publication number: 20170059771
    Abstract: A backlight device 12 includes LEDs 17, an optical member 16 that applies optical effects to light from the LEDs 17 and has a through hole 23 that is through a thickness thereof, and a restricting member 26 having a communication hole 27 that is communicated with the through hole 23. The restricting member 26 is inserted in the through hole 23 to be in contact with an inner surface of the through hole 23 to restrict movement of the optical member 16 along a plate surface of the optical member 16.
    Type: Application
    Filed: May 15, 2015
    Publication date: March 2, 2017
    Inventors: Ryuzo YUKI, Takeshi ISHIDA, Mitsuhiro MURATA, Hirotoshi YASUNAGA
  • Patent number: 9581860
    Abstract: An illumination device includes a light source that emits primary light and a wavelength conversion element that converts at least a portion of the primary light from the light source. The wavelength conversion element includes a phosphor layer having phosphors that absorb at least a portion of the primary light from the light source to emit secondary light, which is polarized, and polymers having birefringence. The phosphors have an anisotropic structure and are aligned generally along a first direction, and the polymers have polymer molecules that are aligned generally along the first direction. An angle formed by a direction of a transition dipole moment of each of the phosphors to a delayed phase axis of each of the polymer molecules with respect to the secondary light emitted from the phosphors towards the polymer molecules is 0° to 45°.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: February 28, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hirotoshi Yasunaga, Ryuzo Yuki, Takeshi Ishida, Shinya Kadowaki
  • Publication number: 20160077382
    Abstract: An illumination device includes a light source that emits primary light and a wavelength conversion element that converts at least a portion of the primary light from the light source. The wavelength conversion element includes a phosphor layer having phosphors that absorb at least a portion of the primary light from the light source to emit secondary light, which is polarized, and polymers having birefringence. The phosphors have an anisotropic structure and are aligned generally along a first direction, and the polymers have polymer molecules that are aligned generally along the first direction. An angle formed by a direction of a transition dipole moment of each of the phosphors to a delayed phase axis of each of the polymer molecules with respect to the secondary light emitted from the phosphors towards the polymer molecules is 0° to 45°.
    Type: Application
    Filed: April 30, 2014
    Publication date: March 17, 2016
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hirotoshi YASUNAGA, Ryuzo YUKI, Takeshi ISHIDA, Shinya KADOWAKI
  • Patent number: 8947650
    Abstract: In a refractive index measuring device (1) for measuring a refractive index of a solid sample (S), the solid sample (S) is closely attached to a prism (3) having a predetermined refractive index with a refractive index liquid (4) having a predetermined refractive index interposed therebetween. A scaled angle (light receiving member) (6) having a light receiving surface (6a) that receives first reflected light (R1), which is a part of light from a light source (2) and which is reflected by the prism (3), is provided. When the prism (3) is rotationally driven by a rotary table (rotational drive unit) (5) and an intensity of second reflected light (R2) detected by a detector (7) becomes lower than a predetermined value, the refractive index of the solid sample (S) is measured by using a position of the first reflected light (R1) on the light receiving surface (6a) of the scaled angle (6).
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: February 3, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirotoshi Yasunaga, Koji Yamabuchi, Takeshi Ishida
  • Publication number: 20130182245
    Abstract: In a refractive index measuring device (1) for measuring a refractive index of a solid sample (S), the solid sample (S) is closely attached to a prism (3) having a predetermined refractive index with a refractive index liquid (4) having a predetermined refractive index interposed therebetween. A scaled angle (light receiving member) (6) having a light receiving surface (6a) that receives first reflected light (R1), which is a part of light from a light source (2) and which is reflected by the prism (3), is provided. When the prism (3) is rotationally driven by a rotary table (rotational drive unit) (5) and an intensity of second reflected light (R2) detected by a detector (7) becomes lower than a predetermined value, the refractive index of the solid sample (S) is measured by using a position of the first reflected light (R1) on the light receiving surface (6a) of the scaled angle (6).
    Type: Application
    Filed: September 9, 2011
    Publication date: July 18, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hirotoshi Yasunaga, Koji Yamabuchi, Takeshi Ishida