Patents by Inventor Koichi MAKIDAI

Koichi MAKIDAI 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 control sheets and imaging systems
    Patent number: 11131896
    Abstract: A light control sheet including a first transparent electrode, a second transparent electrode, a first light control layer positioned between the first and second transparent electrodes, and having light transmission property which is variable by a change in a voltage across the first and second transparent electrodes, and a voltage control unit which applies an AC voltage across the first and second transparent electrodes, and changes a frequency of the AC voltage applied.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: September 28, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Yasushi Hayashida, Akiko Nagai, Koichi Makidai
  • Light control module
    Patent number: 10921656
    Abstract: A light control module including a light control sheet and a drive circuit that applies a voltage to a first electrode and a second electrode of the light control sheet. The light control sheet includes a light control layer switchable between a transparent state and an opaque state according to an applied voltage. The light control sheet has a feeding area for applying a voltage to the first and second electrodes. The light control sheet is formed such that when the light control sheet receives a voltage that causes a transmittance of the light control sheet to be equivalent to a Munsell value of 90% in a region closest to the feeding area, the light control sheet has a transmittance equivalent to a Munsell value of 50% in a region farthest from the feeding area, where a Munsell value of 100% is a maximum transmittance of the light control sheet.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: February 16, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Tetsushi Yoshida, Koichi Makidai, Akiko Nagai
  • LIGHT CONTROL SHEETS AND IMAGING SYSTEMS
    Publication number: 20190227354
    Abstract: A light control sheet including a first transparent electrode, a second transparent electrode, a first light control layer positioned between the first and second transparent electrodes, and having light transmission property which is variable by a change in a voltage across the first and second transparent electrodes, and a voltage control unit which applies an AC voltage across the first and second transparent electrodes, and changes a frequency of the AC voltage applied.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Yasushi HAYASHIDA, Akiko NAGAI, Koichi MAKIDAI
  • LIGHT CONTROL MODULE
    Publication number: 20190041680
    Abstract: A light control module including a light control sheet and a drive circuit that applies a voltage to a first electrode and a second electrode of the light control sheet. The light control sheet includes a light control layer switchable between a transparent state and an opaque state according to an applied voltage. The light control sheet has a feeding area for applying a voltage to the first and second electrodes. The light control sheet is formed such that when the light control sheet receives a voltage that causes a transmittance of the light control sheet to be equivalent to a Munsell value of 90% in a region closest to the feeding area, the light control sheet has a transmittance equivalent to a Munsell value of 50% in a region farthest from the feeding area, where a Munsell value of 100% is a maximum transmittance of the light control sheet.
    Type: Application
    Filed: October 5, 2018
    Publication date: February 7, 2019
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Tetsushi YOSHIDA, Koichi MAKIDAI, Akiko NAGAI