Patents by Inventor Yoshito NISHIGAMI

Yoshito NISHIGAMI 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).

  • Light-emitting element driving device
    Patent number: 11089663
    Abstract: A light-emitting element driving device includes: a first amplifier configured, with respect to each of a plurality of light-emitting element strings, to control a first transistor connected in series with the light-emitting element string based on the current passing through the light-emitting element string; and a second amplifier configured, with respect to each of at least part of the plurality of light-emitting element strings, a second transistor, which is included in a series circuit composed of the second transistor and a first resistor and connected in parallel with the first transistor, based on the current passing through the light-emitting element string and the current passing through the second transistor.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: August 10, 2021
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshito Nishigami, Masaaki Nakayama
  • LIGHT-EMITTING ELEMENT DRIVING DEVICE
    Publication number: 20200389961
    Abstract: A light-emitting element driving device includes: a first amplifier configured, with respect to each of a plurality of light-emitting element strings, to control a first transistor connected in series with the light-emitting element string based on the current passing through the light-emitting element string; and a second amplifier configured, with respect to each of at least part of the plurality of light-emitting element strings, a second transistor, which is included in a series circuit composed of the second transistor and a first resistor and connected in parallel with the first transistor, based on the current passing through the light-emitting element string and the current passing through the second transistor.
    Type: Application
    Filed: June 2, 2020
    Publication date: December 10, 2020
    Inventors: Yoshito NISHIGAMI, Masaaki Nakayama