Patents by Inventor Kento Kawakita

Kento Kawakita 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: 20230287272
    Abstract: The disclosure provides a liquid crystal device including a liquid crystal composition containing a dichroic dye (dye-containing liquid crystal composition) that is in a light transmissive state when no voltage is applied to the transparent electrode and in a light scattering state when voltage is applied. The liquid crystal composition exhibits a negative dielectric constant anisotropy. The haze value of the liquid crystal device is 10% or less when no voltage is applied at 25° C., and the haze value is 50% or more when a rectangular wave voltage (AC 50 V, 60 Hz) is applied. The voltage holding ratio of the dye-containing liquid crystal composition is 60% or less at 25° C. The liquid crystal device provided by the disclosure is used as a component to provide a liquid crystal display apparatus, a light control apparatus, or a light transmitting apparatus with a high contrast.
    Type: Application
    Filed: March 3, 2023
    Publication date: September 14, 2023
    Applicant: DIC Corporation
    Inventors: Yuichi Inoue, Kenta Tojo, Naomi Hatano, Kento Kawakita
  • Patent number: 11584853
    Abstract: Provided are a compound represented by the following general formula (1) and a liquid crystal composition containing the compound, and a liquid crystal display device or a light control device having the liquid crystal composition. The compound represented by general formula (1) has both a large dichroic ratio and high solubility in the host liquid crystal. In addition, it has excellent chemical stability at a level usable as a device. Therefore, by using the compound represented by general formula (1) as a component of a GH-type liquid crystal composition, it is possible to provide a liquid crystal display device or a light control device with high contrast.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: February 21, 2023
    Assignee: DIC CORPORATION
    Inventors: Kento Kawakita, Kenta Tojo, Ayaki Hosono
  • Publication number: 20220073750
    Abstract: Provided are a compound represented by the following general formula (1) and a liquid crystal composition containing the compound, and a liquid crystal display device or a light control device having the liquid crystal composition. The compound represented by general formula (1) has both a large dichroic ratio and high solubility in the host liquid crystal. In addition, it has excellent chemical stability at a level usable as a device. Therefore, by using the compound represented by general formula (1) as a component of a GH-type liquid crystal composition, it is possible to provide a liquid crystal display device or a light control device with high contrast.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 10, 2022
    Applicant: DIC Corporation
    Inventors: Kento Kawakita, Kenta Tojo, Ayaki Hosono