Patents by Inventor Kaori Yamamoto

Kaori Yamamoto 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: 8985799
    Abstract: An object is to prevent or reduce uneven brightness in a direct-type lighting device. A lighting device according to the present technology includes LEDs 28 arranged in a matrix on a bottom plate of the chassis and a reflector 26 including first and second side walls 26a, 26b each arranged between the LEDs 28 adjacent in a Y-axis direction and an X-axis direction, respectively. The LEDs 28 are configured to emit light toward an opening of the chassis. The first side wall 26a has a side surface 26a rising from a front surface 30a of an LED board 30 toward the opening of the chassis while being inclined. The first side wall 26a extends straightly along the X-axis direction and has a triangular cross-sectional shape taken along the Y-axis direction. The second side wall 26b has a prism-like shape rising from the front surface 30a toward the opening and has a rhombic outline in a plan view.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: March 24, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takaharu Shimizu, Kaori Yamamoto
  • Publication number: 20130222705
    Abstract: An object is to prevent or reduce uneven brightness in a direct-type lighting device. A lighting device according to the present technology includes LEDs 28 arranged in a matrix on a bottom plate of the chassis and a reflector 26 including first and second side walls 26a, 26b each arranged between the LEDs 28 adjacent in a Y-axis direction and an X-axis direction, respectively. The LEDs 28 are configured to emit light toward an opening of the chassis. The first side wall 26a has a side surface 26a rising from a front surface 30a of an LED board 30 toward the opening of the chassis while being inclined. The first side wall 26a extends straightly along the X-axis direction and has a triangular cross-sectional shape taken along the Y-axis direction. The second side wall 26b has a prism-like shape rising from the front surface 30a toward the opening and has a rhombic outline in a plan view.
    Type: Application
    Filed: November 24, 2011
    Publication date: August 29, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takaharu Shimizu, Kaori Yamamoto
  • Patent number: 8518536
    Abstract: The object is to provide a high-purity magnesium oxide particle aggregate that is redispersible and can be supplied with keeping high purity, and a method for producing the same. A magnesium oxide particle aggregate that is an aggregate of magnesium oxide particles, wherein the magnesium oxide particles have an average particle size of 1 ?m or less, and comprises Si, Al, Ca, Fe, V, Cr, Mn, Ni, Zr, B and Zn as impurities in their respective amounts of 10 ppm by mass or less, wherein the total amount of the impurities is 100 ppm by mass or less.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: August 27, 2013
    Assignee: Tateho Chemical Industries Co., Ltd.
    Inventors: Ryuichi Ishibashi, Atsuya Kawase, Kaori Yamamoto
  • Patent number: 8512673
    Abstract: Magnesium oxide powders having a large diameter of crystallite, and having a favorable crystallinity are provided. Magnesium oxide powders: having peak widths at half-height of the peaks on a (111) plane, a (200) plane and a (220) plane of each no greater than 0.20 degrees as determined with a powder X-ray diffraction method carried out using a Cu—K? ray; and having a crystallite diameter of no less than 700 ?.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: August 20, 2013
    Assignee: Tateho Chemical Industries Co., Ltd.
    Inventors: Yoshihisa Ohsaki, Atsuya Kawase, Kaori Yamamoto
  • Patent number: 8480288
    Abstract: A lamp clip 18 includes a main body 27, a lamp gripping portion 28, a first mounting portion 30 and a second mounting portion 31. The main body 27 is mounted to a chassis 14 that houses a plurality of tubular cold cathode tubes 17. The lamp gripping portion 28 is provided on a surface of the main body 27 opposing the cold cathode tube 17 so as to grip the cold cathode tube 17. The first mounting portion 30 protrudes from the main body 27 so as to extend toward the chassis 14 and to be in a first mounting hole 32 formed in the chassis 14 so that a rim of the first mounting hole 32 is sandwiched between the first mounting portion 30 and the main body 27. The second mounting portion 31 protrudes from the main body 27 so as to extend toward the chassis 14 and to be inserted in a second mounting hole 33 formed in the chassis 14 so that a rim of the second mounting hole 33 is sandwiches between the second mounting portion 31 and the main body 27.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: July 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasumori Kuromizu, Masashi Yokota, Syuki Yamamoto, Kaori Yamamoto
  • Patent number: 8425069
    Abstract: A lighting device 12 of the present invention includes a plurality of light sources 17 and an optical member arranged closer to the light-exiting portion 15z than the light sources 17. The optical member 15 includes a prism diffuser plate 15a for diffusing light emitted from the light sources 17 and exiting from a lens sheet 15c arranged closer to the light-exiting portion 15z than the prism diffuser plate 15a. The prism diffuser plate 15a has prisms on a surface located on a side closer to the light-exiting portion 15z. The lens sheet 15c has convex lenses 62 on a surface closer to the light-exiting portion 15z.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: April 23, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuki Yamamoto, Yasumori Kuromizu, Kaori Yamamoto, Takahiro Yoshikawa
  • Patent number: 8395579
    Abstract: A display device includes a light source and a light source driver configured to drive the light source. In at least one embodiment, the light source driver is configured to drive the light source with brightness control. It is capable of generating pulse width modulation signals using different dimming. A dimming frequency is selected from the different dimming frequencies according to an installation mode of the display device.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: March 12, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kaori Yamamoto, Shuki Yamamoto, Hiroshi Kunii
  • Patent number: 8342704
    Abstract: A lighting device 12 of the present invention includes a light output portion 15z from which light is output, a light source 17, and an optical member 15b provided on the light output portion 15z side with respect to the light source 17. The optical member 15b is held by a pair of holding members. The holding members include a first holding member 15a that holds the optical member 15b from the light source 17 side and a second holding member 16 that holds the optical member 15b from an opposite side from the light source 17 side. A buffer 70 is provided in at least one of a space between the optical member 15b and the first holding member 15a and a space between the optical member 15b and the second holding member 16. The buffer 70 has at least one rough surface on a side that abuts the optical member 15b.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kaori Yamamoto
  • Publication number: 20120120343
    Abstract: An LED module (MJ) includes an LED (22), and a lens (11) that transmits light from that LED (22) therethrough. In this LED module (MJ), a depression (11D) is formed on a lens surface (11S) of the lens (11) where it overlaps the LED (22), and furthermore, a prescribed formula is satisfied.
    Type: Application
    Filed: March 15, 2010
    Publication date: May 17, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kaori Yamamoto
  • Publication number: 20120081614
    Abstract: An LED module (MJ) includes an LED (22), a mounting substrate (21) for mounting the LED (22), a lens (24) in which light from the LED (22) is output from a lens surface (24S), and a built-in reflective sheet (11) interposed between a back surface (24B) of the lens surface (24S) and the mounting substrate (21), and provided with a built-in reflective surface (11U) facing the back surface (24B) of the lens surface (24S).
    Type: Application
    Filed: March 15, 2010
    Publication date: April 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kaori Yamamoto
  • Publication number: 20120063122
    Abstract: The backlight unit (49) of a display device (69) having a liquid crystal display panel (59) is provided with a chassis (41), a diffusion plate (43) supported by the chassis, and a light source which irradiates the diffusion plate with light. The light source has a plurality of light-emitting modules (MJ) which include an LED (22) serving as a light-emitting element and a diffusion lens (24) that covers the LED. The light-emitting modules are arranged in a grid pattern on the chassis supporting the diffusion plate. Support pins (26) for supporting the diffusion plate are disposed at points on the chassis. The support pins are arranged on line segments connecting adjacent pairs of light-emitting modules.
    Type: Application
    Filed: February 17, 2010
    Publication date: March 15, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masashi Yokota, Kaori Yamamoto
  • Publication number: 20110063526
    Abstract: A display device includes a light source and a light source driver configured to drive the light source. In at least one embodiment, the light source driver is configured to drive the light source with brightness control. It is capable of generating pulse width modulation signals using different dimming. A dimming frequency is selected from the different dimming frequencies according to an installation mode of the display device.
    Type: Application
    Filed: May 20, 2009
    Publication date: March 17, 2011
    Inventors: Kaori Yamamoto, Shuki Yamamoto, Hiroshi Kunii
  • Publication number: 20110051417
    Abstract: A lamp clip 18 includes a main body 27 mounted to a chassis 14 and a lamp gripping portion 28 having an open-end ring shape. The lamp gripping portion 28 is provided on a side of the main body 27 opposite from the chassis 14 so as to grip a tubular cold cathode tube 17 housed in the chassis 14. At least a part of an inner surface of the lamp gripping portion 28 opposing the cold cathode tube 17 is sloped surfaces 44 and the distances from the cold cathode tube 17 gradually decrease from a center side toward respective edge sides along a length direction of the cold cathode tube 17.
    Type: Application
    Filed: December 10, 2008
    Publication date: March 3, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasumori Kuromizu, Masashi Yokota, Syuki Yamamoto, Kaori Yamamoto
  • Publication number: 20110001893
    Abstract: An illumination device 12 according to the present invention includes a linear light source 17, a chassis 14 that houses the linear light source 17, and a spacer 41 that is provided between the linear light source 17 and the chassis 14 so as to separate the linear light source 17 from the chassis 14. The spacer 41 is arranged under the linear light source 17 on the chassis 14 when viewed in plan. Since the spacer 41 is provided between the linear light source 17 and the chassis 14 so as to maintain a distance therebetween over a predetermined distance, the spacer 41 does not overlap the linear light source 17. Therefore, dark areas are less likely to be present on the linear light source 17 and thus uniformity of illumination luminance distribution can be ensured.
    Type: Application
    Filed: January 26, 2009
    Publication date: January 6, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kaori Yamamoto
  • Publication number: 20100328556
    Abstract: An illumination device 12 according to the present invention includes a light source 17, a chassis 14 that houses the light source 17, and a stand 40 that holds the chassis 14 in an upright position. The stand 40 includes support portions 44 and 45 that directly support the chassis 14. Vertical rails 51 and 52 are mounted on a surface of the chassis 14 on an opposite side from the light source 17 with longitudinal directions thereof aligned with a vertical direction of the chassis 14 and connected to the support portions 44 and 45. Diagonal rails 61 and 62 are mounted on the surface of the chassis 14 with longitudinal directions thereof aligned with directions that intersect with the vertical direction of the chassis and connected to the support portions 44 and 45 to which the vertical rails 51 and 52 are connected.
    Type: Application
    Filed: January 26, 2009
    Publication date: December 30, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kaori Yamamoto
  • Publication number: 20100328557
    Abstract: A lighting device 12 of the present invention includes a light output portion 15z from which light is output, a light source 17, and an optical member 15b provided on the light output portion 15z side with respect to the light source 17. The optical member 15b is held by a pair of holding members. The holding members include a first holding member 15a that holds the optical member 15b from the light source 17 side and a second holding member 16 that holds the optical member 15b from an opposite side from the light source 17 side. A buffer 70 is provided in at least one of a space between the optical member 15b and the first holding member 15a and a space between the optical member 15b and the second holding member 16. The buffer 70 has at least one rough surface on a side that abuts the optical member 15b.
    Type: Application
    Filed: January 26, 2009
    Publication date: December 30, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kaori Yamamoto
  • Publication number: 20100296008
    Abstract: A lighting device 12 of the present invention includes a light source 17 having a conductive portion 19 at ends thereof, an optical sheet 15 arranged on a light output side with respect to the light source 17 and a cover 20 having light blocking effect and covering the end of the light source 17. The cover 20 includes a covering portion 20z for covering the light source and an optical sheet supporting portion 20a for supporting the optical sheet 15 on a surface located on the light output side with respect to the covering portion 20z. A projection 71 projects from the optical sheet supporting portion 20a toward the middle of the light source 17.
    Type: Application
    Filed: October 21, 2008
    Publication date: November 25, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasumori Kuromizu, Masashi Yokota, Syuki Yamamoto, Kaori Yamamoto
  • Publication number: 20100296003
    Abstract: A lamp clip 18 includes a main body 27 and a lamp gripping portion 28. The main body 27 is mounted to a chassis 14. The lamp gripping portion 28 has an open-end ring shape and is provided on an opposite side of the main body 27 from the chassis 14 so as to grip a tubular cold cathode tube 17 housed in the chassis 14. At least a part of the lamp gripping portion 28 is tapered such that a size that measures in a length direction of the cold cathode tube 17 gradually decreases toward the cold cathode tube 17.
    Type: Application
    Filed: December 10, 2008
    Publication date: November 25, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasumori Kuromizu, Masashi Yokota, Syuki Yamamoto, Kaori Yamamoto
  • Publication number: 20100283905
    Abstract: A lighting device 12 of the present invention includes a plurality of light sources 17 and an optical member arranged closer to the light-exiting portion 15z than the light sources 17. The optical member 15 includes a prism diffuser plate 15a for diffusing light emitted from the light sources 17 and exiting from a lens sheet 15c arranged closer to the light-exiting portion 15z than the prism diffuser plate 15a. The prism diffuser plate 15a has prisms on a surface located on a side closer to the light-exiting portion 15z. The lens sheet 15c has convex lenses 62 on a surface closer to the light-exiting portion 15z.
    Type: Application
    Filed: December 10, 2008
    Publication date: November 11, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shuki Yamamoto, Yasumori Kuromizu, Kaori Yamamoto, Takahiro Yoshikawa
  • Patent number: D634299
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: March 15, 2011
    Assignee: Casio Keisanki Kabushiki Kaisha
    Inventors: Katsuhiro Nara, Kaori Yamamoto, Masaru Jinde