Patents by Inventor Norimasa Furukawa

Norimasa Furukawa 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).

  • Publication number: 20170192135
    Abstract: A display unit of the disclosure includes a display panel and a light-distribution adjustment sheet. The light-distribution adjustment sheet is provided on the display panel, and includes a protrusion that protrudes toward the display panel. The protrusion includes a first region including a curved surface, and a second region including a flat surface.
    Type: Application
    Filed: May 13, 2015
    Publication date: July 6, 2017
    Inventors: NORIMASA FURUKAWA, MITSUHIKO TAKI, ICHIRO UTSUMI, KENICHI NAKAKI
  • Patent number: 9395578
    Abstract: Provided is an illumination unit capable of utilizing back light. Also provided are a display and an electronic apparatus each including this illumination unit. A display includes a display panel, and an illumination unit configured to illuminate the display panel. The illumination unit includes a light-guiding plate, a diffusion modulation device, and a reflection modulation device in this order, from the display panel side. The light-guiding plate has a light source on a side face thereof. The diffusion modulation device is capable of performing modulation between a first state of diffusing light from the light source, and a second state of allowing incident light from a back face side to pass to a front face side. The reflection modulation device is capable of performing modulation between a third state of reflecting transmitted diffused light of the diffusion modulation device to a front face side, and a fourth state of allowing incident light from a back face side to the front face side.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: July 19, 2016
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Kentaro Okuyama
  • Publication number: 20160195226
    Abstract: A light source unit is used in a multiply combined manner, and includes a light source element having a substrate and one or more light emitting elements disposed on the substrate. The light source unit is configured such that when a plurality of the light source units are arranged in cascade, the light source element in the light source unit comes to in electric connection with another light source element in an adjacent light source unit. Thereby, the plurality of light source units may emit light at the same time. Thus, the structure similar to rod-shaped light source such as CCFL is achieved.
    Type: Application
    Filed: March 15, 2016
    Publication date: July 7, 2016
    Applicant: Sony Corporation
    Inventors: Norimasa Furukawa, Hiroshi Murayama, Ichiro Murakami
  • Patent number: 9316360
    Abstract: A light source unit is used in a multiply combined manner, and includes a light source element having a substrate and one or more light emitting elements disposed on the substrate. The light source unit is configured such that when a plurality of the light source units are arranged in cascade, the light source element in the light source unit comes to in electric connection with another light source element in an adjacent light source unit. Thereby, the plurality of light source units may emit light at the same time. Thus, the structure similar to rod-shaped light source such as CCFL is achieved.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: April 19, 2016
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Hiroshi Murayama, Ichiro Murakami
  • Patent number: 9318058
    Abstract: A display unit includes: an image display panel; a backlight section disposed on a back surface of the image display panel, and including a light guide member and a polymer dispersed liquid crystal panel; a light source emitting light, the light being allowed to enter the light guide member of the backlight section; a polymer dispersed liquid crystal panel drive section driving the polymer dispersed liquid crystal panel of the backlight section in synchronization with writing of an image displayed on the image display panel to control a location that scatters light incident on the light guide member on the polymer dispersed liquid crystal panel; and a light source drive section allowing the light source to blink in synchronization with a period in which light is scattered by the polymer dispersed liquid crystal panel.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: April 19, 2016
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Naoki Ikawa, Ichiro Murakami, Kentaro Okuyama, Akira Ebisui
  • Publication number: 20150257220
    Abstract: Disclosed herein is a light emitting element driving circuit including: a capacitive element; a current limiting section limiting a charging current for the capacitive element; a first constant current source stabilizing a discharging current supplied from the capacitive element to a light emitting element; and a switch controlling ON and OFF in supplying the discharging current to the light emitting element. The capacitive element is charged with electricity from the power source circuit in the preceding stage through the current limiting section. Also, the electric charges in the capacitive element are discharged in the form of a given discharging current for the discharging time period, and the light emitting element emits light in accordance with the given discharging current. In this case, the charging current for the capacitive element is limited by the current limiting section in such a way that the current value thereof becomes small.
    Type: Application
    Filed: May 20, 2015
    Publication date: September 10, 2015
    Applicant: Sony Corporation
    Inventor: Norimasa Furukawa
  • Publication number: 20140240642
    Abstract: Provided is an illumination unit capable of utilizing back light. Also provided are a display and an electronic apparatus each including this illumination unit. A display includes a display panel, and an illumination unit configured to illuminate the display panel. The illumination unit includes a light-guiding plate, a diffusion modulation device, and a reflection modulation device in this order, from the display panel side. The light-guiding plate has a light source on a side face thereof. The diffusion modulation device is capable of performing modulation between a first state of diffusing light from the light source, and a second state of allowing incident light from a back face side to pass to a front face side. The reflection modulation device is capable of performing modulation between a third state of reflecting transmitted diffused light of the diffusion modulation device to a front face side, and a fourth state of allowing incident light from a back face side to the front face side.
    Type: Application
    Filed: September 4, 2012
    Publication date: August 28, 2014
    Applicant: SONY CORPORATION
    Inventors: Norimasa Furukawa, Kentaro Okuyama
  • Publication number: 20140139461
    Abstract: A display unit includes: an image display panel; a backlight section disposed on a back surface of the image display panel, and including a light guide member and a polymer dispersed liquid crystal panel; a light source emitting light, the light being allowed to enter the light guide member of the backlight section; a polymer dispersed liquid crystal panel drive section driving the polymer dispersed liquid crystal panel of the backlight section in synchronization with writing of an image displayed on the image display panel to control a location that scatters light incident on the light guide member on the polymer dispersed liquid crystal panel; and a light source drive section allowing the light source to blink in synchronization with a period in which light is scattered by the polymer dispersed liquid crystal panel.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 22, 2014
    Applicant: SONY CORPORATION
    Inventors: Norimasa Furukawa, Naoki Ikawa, Ichiro Murakami, Kentaro Okuyama, Akira Ebisui
  • Patent number: 8456413
    Abstract: A display device includes: a light source section having multiple light sources to emit light in illumination colors including three primary colors of light; a display section for displaying an image in monochrome color by modulating the light emitted from the light source section; and a display control section for driving the light source section and the display section in a field sequential system. The display control section includes a determining section for determining a degree of white or a degree of complementary color of the light sources on the basis of an amount of lighting of each of the illumination colors of the light sources, a setting section for setting white components or complementary-color components of a color determined by a mixing ratio of the illumination colors, and an allocating section for allocating the set white components or the complementary-color components to the fields.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: June 4, 2013
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Mitsuyasu Asano, Tomohiro Nishi
  • Patent number: 8395723
    Abstract: A display device includes: a panel; a light source provided on a surface disposed with facing at an interval of a predetermined distance from the back of the panel of said panel; and at least one optical sheet placed in front of said light source; wherein said optical sheet is placed with predetermined inclination angle to the above back of the panel so that it becomes closer from the top end to the bottom end of the back of the panel of said panel.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: March 12, 2013
    Assignee: Sony Corporation
    Inventor: Norimasa Furukawa
  • Patent number: 8264450
    Abstract: The present invention provides an illuminating apparatus locally reducing light intensity without depending on the configuration of a light source itself. An illuminating apparatus used as a backlight of a display apparatus having a liquid crystal display panel with a pair of first polarizers, including a light source and a liquid crystal light control panel. The liquid crystal light control panel has a pair of second polarizers and suppresses amount of transmission of light from the light source, thereby allows the light from the light source to have such a light intensity distribution along a plane that light intensity is locally reduced. The polarization degree in the second polarizers is optimized so that transmission light amount ratio of the second polarizers is lower than that of the first polarizers.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: September 11, 2012
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Jun Shimizu
  • Patent number: 8248359
    Abstract: A display apparatus includes a display section, a backlight, and a drive section. The display section is formed from a liquid crystal display apparatus of the transmission type having a display area formed from pixels arranged in a matrix. The backlight is formed from a plurality of light source units disposed individually corresponding to a plurality of display area units which form the display area and configured to illuminate the back side of the display section. The drive section is configured to drive the display section and the backlight based on input signals from the outside. The drive section includes a control section configured to control a light emitting state of the light source unit corresponding to each of the display area units based on a display area unit internal maximum input signal which indicates a maximum value from among the input signals corresponding to the display area unit.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: August 21, 2012
    Assignee: Sony Corporation
    Inventors: Tetsuji Inada, Mitsuyasu Asano, Yoshihiro Katsu, Norimasa Furukawa, Ichiro Murakami
  • Publication number: 20120188293
    Abstract: Disclosed herein is a light emitting element driving circuit including: a capacitive element; a current limiting section limiting a charging current for the capacitive element; a first constant current source stabilizing a discharging current supplied from the capacitive element to a light emitting element; and a switch controlling ON and OFF in supplying the discharging current to the light emitting element. The capacitive element is charged with electricity from the power source circuit in the preceding stage through the current limiting section. Also, the electric charges in the capacitive element are discharged in the form of a given discharging current for the discharging time period, and the light emitting element emits light in accordance with the given discharging current. In this case, the charging current for the capacitive element is limited by the current limiting section in such a way that the current value thereof becomes small.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 26, 2012
    Applicant: SONY CORPORATION
    Inventor: Norimasa Furukawa
  • Patent number: 8223295
    Abstract: A liquid-crystal display that can inhibit the coloring of an image when a liquid-crystal panel is viewed from an oblique direction is provided. An optical filter is disposed at the forward end of a liquid-crystal panel and has different transmittances between a light component that travels in an oblique direction and a light component that travels in a direction normal to the multilayer, where both of the light components have a predetermined wavelength range. In the case where a wide-color-gamut light source, such as LEDs, is used as a light sources of a backlight unit, when the liquid-crystal panel is viewed from an oblique direction, the entire image area tends to be reddish, and the color temperature tends to decrease. In this case, the optical filter is configured such that the intensity of a visible red light component is selectively reduced such that the intensity of a visible blue light component is increased, thereby inhibiting the reddening of an image area when viewed from an oblique direction.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: July 17, 2012
    Assignee: Sony Corporation
    Inventors: Satoshi Sato, Satoshi Kawamura, Masaharu Senoue, Norimasa Furukawa, Kenichi Sasaki
  • Patent number: 8174487
    Abstract: The disclosure includes various embodiments including, for example: (i) a color liquid crystal display unit has a color display panel of transmissive type and a backlight unit placed behind the color display panel; (ii) a backlight unit has a plurality of LEDs connected in series and a drive unit to drive the LEDs; (iii) a temperature sensor to detect the temperature of LEDs; (iv) groups of LEDs are arranged in regions where the display unit has the same temperature; and (v) a drive unit controls current to be supplied to LEDs in response to temperature detected by the temperature sensor so that the LEDs retain the constant brightness even when the LEDs fluctuate in temperature.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: May 8, 2012
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Kenichi Kikuchi, Hiroaki Ichikawa
  • Publication number: 20120062584
    Abstract: An image display apparatus and an image display method capable of suppressing the color breakup occurring during eye tracking of a picture with motion in a field-sequential display are provided. A display section (a display panel 2 and a backlight 3) time-divisionally displays, in a manner of the field-sequential display, field images of plural colors in a display sequence controlled by a display sequence control section 12. The display sequence of the field images of plural colors is controlled to allow a composite luminance distribution perceived by a viewer on his retina to have a predetermined profile, the composite luminance distribution being created based on a group of field images which configures a frame or two frames in successive time sequence in a picture with motion displayed on the display section, the predetermined profile having highest luminance in a mid-range thereof and having luminance getting lower toward a periphery thereof to spread with bilateral-symmetry.
    Type: Application
    Filed: May 20, 2010
    Publication date: March 15, 2012
    Inventors: Norimasa Furukawa, Ichiro Murakami
  • Patent number: 8111020
    Abstract: The present invention is directed to a drive apparatus for a backlight unit (20) in which plural LED (Light Emitting Diode) elements are cascade-connected every three primary colors, which comprises a signal generating unit (44) for generating a signal having an arbitrary amplitude, an adjustment unit (50) for adjusting light emission quantities of groups of LED elements (30) on the basis of the signal which has been generated by the signal generating unit (44), a voltage applying unit (41) for applying a predetermined voltage every the groups of LED elements (30), light emission quantity detecting units (33) for detecting quantities of rays of light which have been emitted from the groups of LED elements (30), calorific value detecting units (32) for detecting calorific values emitted from the groups of LED elements in accordance with the voltage which has been applied to the voltage applying unit (41), and a control unit (50) for controlling the signal generating unit (44) on the basis of light emission qua
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: February 7, 2012
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Hiroaki Ichikawa, Kenichi Kikuchi
  • Patent number: 8072412
    Abstract: A proposed backlight is suitable for a large size liquid crystal display. A backlight 2 for illuminating a liquid crystal panel 3 from the rear, is formed by combining a plurality of backlight units 10, 10, . . . . By providing a transparent acrylic board 4 between the backlight 2 and the liquid crystal panel 3, it becomes possible to prevent brightness unevenness from occurring at a junction section of the backlight units 10, 10, . . . , even when the backlight is formed by combining the plurality of the backlight units 10, 10, . . . .
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: December 6, 2011
    Assignee: Sony Corporation
    Inventor: Norimasa Furukawa
  • Publication number: 20110280002
    Abstract: A lighting device includes: a first light source group having first light sources partitioned into sections and controlled to light for each section; and a second light source group having second light sources partitioned into sections and controlled to light for each section. The second light source has a light distribution different from the first light source. The first and second light source groups are allowed to light independently of each other. The first light sources are arranged in a first array pattern allowing a uniform in-plane-distribution of luminance at a predetermined distance therefrom when whole of the first light source group is under lighting condition. The second light sources are arranged in a second array pattern different from the first array pattern. The second array pattern allows a uniform in-plane-distribution of luminance at the predetermined distance therefrom when whole of the second light source group is under lighting condition.
    Type: Application
    Filed: April 4, 2011
    Publication date: November 17, 2011
    Applicant: Sony Corporation
    Inventor: Norimasa FURUKAWA
  • Patent number: 8035603
    Abstract: An illumination system capable of varying the light emission intensity of illumination light while maintaining the color balance of the illumination light is provided. An additive process illumination system obtaining a specific color light by mixing a plurality of color lights, the illumination system may include a plurality of light sources each emitting a different color light; a lighting period varying means for varying the lighting period of each light source; a light emission intensity varying means for varying the light emission intensity of each light source; and a control means for controlling the lighting period varying means and the light emission intensity varying means to control the light emission amount of each light source.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 11, 2011
    Assignee: Sony Corporation
    Inventors: Norimasa Furukawa, Mitsuru Okabe, Mitsunari Hoshi