Patents by Inventor Hironori Takaoka

Hironori Takaoka 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: 20110128304
    Abstract: A light emitting element circuit according to the present invention includes: a plurality of LED chains connected in parallel to each other, each of the plurality of LED chains including LEDs that are a plurality of light emitting elements connected in series; a transistor that is a reference element connected in series to the LED chain being one of the plurality of LED chains; and transistors that are one or more subordinate elements respectively connected in series to the LED chains among the plurality of LED chains except for the LED chain, a control voltage thereof following a control voltage of the transistor, wherein the transistor takes a voltage of a predetermined node on the LED chain as the control voltage.
    Type: Application
    Filed: November 18, 2010
    Publication date: June 2, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Hironori TAKAOKA
  • Patent number: 7362302
    Abstract: A liquid crystal display according to the present invention can prevent interference fringe on a display panel due to a switching noise of a DC/DC converter, therefore a high-quality image can be displayed. Either of input signals for a timing control circuit is also supplied to a PLL circuit and the DC/DC converter is controlled by an output signal of the PLL circuit, thereby enables to synchronize a switching frequency of the DC/DC converter and control signal.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: April 22, 2008
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hironori Takaoka, Hisaharu Oura, Susumu Shibata, Tetsuya Ikemoto
  • Publication number: 20050052398
    Abstract: A liquid crystal display according to the present invention can prevent interference fringe on a display panel due to a switching noise of a DC/DC converter, therefore a high-quality image can be displayed. Either of input signals for a timing control circuit is also supplied to a PLL circuit and the DC/DC converter is controlled by an output signal of the PLL circuit, thereby enables to synchronize a switching frequency of the DC/DC converter and control signal.
    Type: Application
    Filed: October 4, 2004
    Publication date: March 10, 2005
    Applicant: ADVANCED DISPLAY INC.
    Inventors: Hironori Takaoka, Hisaharu Oura, Susumu Shibata, Tetsuya Ikemoto
  • Patent number: 6822633
    Abstract: A liquid crystal display according to the present invention can prevent interference fringe on a display panel due to a switching noise of a DC/DC converter, therefore a high-quality image can be displayed. Either of input signals for a timing control circuit is also supplied to a PLL circuit and the DC/DC converter is controlled by an output signal of the PLL circuit, thereby enables to synchronize a switching frequency of the DC/DC converter and control signal.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: November 23, 2004
    Assignee: Advanced Display Inc.
    Inventors: Hironori Takaoka, Hisaharu Oura, Susumu Shibata, Tetsuya Ikemoto
  • Patent number: 6534927
    Abstract: A multiple-light cold-cathode tube lighting device of the invention includes a main inverter circuit 1 constituted by a positive feedback amplifying circuit including transistors Q1, Q2 and having an oscillating function, and a sub-inverter circuit 2 constituted similarly to the main inverter circuit 1. One of the base windings is connected to the positive feedback circuits of the two inverter circuits. Cold-cathode tubes CCFL1 connected to respective output ends of the two transformers T1, T2 of the main inverter circuit 1 are synchronized with cold-cathode tubes CCFL2 connected to respective output ends of two transformers of the sub-inverter circuit 2, and the cold-cathode tubes CCFL1, CCFL2 can be individually subjected to light control by using switches.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: March 18, 2003
    Assignee: Kabushiki Kaisha Advanced Display
    Inventor: Hironori Takaoka
  • Patent number: 6515427
    Abstract: The inverter for multi-tube type backlight includes two step-up transformers of one-side grounded type, wherein the two step-up tranformers respectively output electric power to one or a plurality of cold cathode tubes, and wherein outputs of the two step-up tranformers are of identical frequency but of mutually reversed phases.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: February 4, 2003
    Assignee: Advanced Display Inc.
    Inventors: Hisaharu Oura, Hironori Takaoka
  • Publication number: 20020050973
    Abstract: A liquid crystal display according to the present invention can prevent interference fringe on a display panel due to a switching noise of a DC/DC converter, therefore a high-quality image can be displayed. Either of input signals for a timing control circuit is also supplied to a PLL circuit and the DC/DC converter is controlled by an output signal of the PLL circuit, thereby enables to synchronize a switching frequency of the DC/DC converter and control signal.
    Type: Application
    Filed: October 10, 2001
    Publication date: May 2, 2002
    Applicant: ADVANCED DISPLAY INC.
    Inventors: Hironori Takaoka, Hisaharu Oura, Susumu Shibata, Tetsuya Ikemoto
  • Publication number: 20020047619
    Abstract: The inverter for multi-tube type backlight includes two step-up transformers of one-side grounded type, wherein the two step-up transformers respectively output electric power to one or a plurality of cold cathode tubes, and wherein outputs of the two step-up transformers are of identical frequency but of mutually reversed phases.
    Type: Application
    Filed: November 26, 2001
    Publication date: April 25, 2002
    Applicant: ADVANCED DISPLAY INC.
    Inventors: Hisaharu Oura, Hironori Takaoka