Patents by Inventor Seiichi Takasaka

Seiichi Takasaka 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).

  • LED control device and control method of LED control device
    Patent number: 10212772
    Abstract: In an LED control device, a first integration circuit changes a first reference signal to be different from a second reference signal in one cycle of a first light controlling signal, and a first control unit controls a first switching element by means of a first control signal Gate1 at a first operational frequency for turning on and off a first switching element, the first operational frequency being different from a second operational frequency for turning on and off a second switching element, in one cycle of a first light controlling signal.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: February 19, 2019
    Assignee: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
    Inventors: Toshihiko Nagasaka, Katsuya Ikeda, Seiichi Takasaka, Shinya Iijima, Ryuichi Ito
  • LED CONTROL DEVICE AND CONTROL METHOD OF LED CONTROL DEVICE
    Publication number: 20180270926
    Abstract: In an LED control device, a first integration circuit changes a first reference signal to be different from a second reference signal in one cycle of a first light controlling signal, and a first control unit controls a first switching element by means of a first control signal Gate1 at a first operational frequency for turning on and off a first switching element, the first operational frequency being different from a second operational frequency for turning on and off a second switching element, in one cycle of a first light controlling signal.
    Type: Application
    Filed: January 30, 2017
    Publication date: September 20, 2018
    Applicant: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
    Inventors: Toshihiko NAGASAKA, Katsuya IKEDA, Seiichi TAKASAKA, Shinya IIJIMA, Ryuichi ITO
  • LED illumination dimming circuit and LED illumination dimming method
    Patent number: 9247606
    Abstract: An LED illumination dimming circuit comprises a capacitor connected to the first output terminal at a first end thereof and to the second output terminal at a second end thereof; a coil connected to the second end of the capacitor at a first end thereof; a switch element connected to a second end of the coil at a first end thereof; a resistor connected to a second end of the switch element at a first end thereof and to the ground terminal at a second end thereof; a diode connected to the power supply terminal at a cathode thereof and to the second end of the coil at an anode thereof; and a controlling circuit that controls an operation of the switch element with a switch controlling signal.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: January 26, 2016
    Assignee: Shindengen Electric Manufacturing Co., Ltd.
    Inventors: Toshihiko Nagasaka, Katsuya Ikeda, Seiichi Takasaka
  • LED ILLUMINATION DIMMING CIRCUIT AND LED ILLUMINATION DIMMING METHOD
    Publication number: 20150216012
    Abstract: An LED illumination dimming circuit comprises a capacitor connected to the first output terminal at a first end thereof and to the second output terminal at a second end thereof; a coil connected to the second end of the capacitor at a first end thereof; a switch element connected to a second end of the coil at a first end thereof; a resistor connected to a second end of the switch element at a first end thereof and to the ground terminal at a second end thereof; a diode connected to the power supply terminal at a cathode thereof and to the second end of the coil at an anode thereof; and a controlling circuit that controls an operation of the switch element with a switch controlling signal.
    Type: Application
    Filed: February 13, 2013
    Publication date: July 30, 2015
    Applicant: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD
    Inventors: Toshihiko Nagasaka, Katsuya Ikeda, Seiichi Takasaka