Patents by Inventor Hideaki SHIROTORI

Hideaki SHIROTORI 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: 20240004124
    Abstract: A backlight includes a plurality of discrete light sources configured to face a display, and an optical film disposed on the light sources and below and proximate a first plane. The optical film includes a plurality of through-holes extending between first and second major surfaces of the optical film. Each through-hole has a first opening at the first major surface, and a second opening at the second major surface with an open area A2. Each through-hole has length, H, such that H/A2 is greater than or equal to about 0.13.
    Type: Application
    Filed: November 10, 2021
    Publication date: January 4, 2024
    Inventors: Hideaki Shirotori, Kazuhiko Toyooka, Sayaka Kado, Gary T. Boyd
  • Publication number: 20230350119
    Abstract: An optical stack includes a reflective polarizer including a plurality of interference layers and an absorbing polarizer disposed on the reflective polarizer. The plurality of interference layers transmits at least about 85% of an incident light having a first polarization state, reflects at least about 80% of the incident light having a second polarization state, and transmits less than about 0.1% of the incident light having the second polarization state. The absorbing polarizer has a first transmittance for the first polarization state and a second transmittance for the second polarization state. An average of the first and second transmittances is greater than about 0.46. The second transmittance has a first standard deviation. The optical stack has a transmittance for the second polarization state having a second standard deviation which is less than the first standard deviation by at least about 10%. A display includes the optical stack.
    Type: Application
    Filed: December 8, 2020
    Publication date: November 2, 2023
    Inventors: Takashi Fujita, Hideaki Shirotori, Chikara Abe, Matthew B. Johnson, Brianna N. Wheeler, Adam D. Haag
  • Publication number: 20220308391
    Abstract: An optical system includes a display, a backlight configured to emit at least a light in a first wavelength range extending between about 400 nm and about 500 nm, and an optical film disposed adjacent the backlight and configured to absorb a light in a second wavelength range extending between about 415 nm to about 455 nm, wherein a ratio of the light in the second wavelength range transmitted by the optical film to the light in the first wavelength range transmitted by the optical film is less than or equal to 50%.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: Hideaki Shirotori, Naota Sugiyama, Taiki Ihara, Hiroki Hayashi
  • Publication number: 20160266298
    Abstract: Edge-lit LCD backlight units having a viewable area comprise (a) a downconversion film element, (b) a light guide comprising extraction elements, (c) a reflector and (d) blue LEDs. The extraction elements extend beyond the viewable area.
    Type: Application
    Filed: September 15, 2014
    Publication date: September 15, 2016
    Inventors: Joshua D. TIBBITS, Shu-Ching FAN, Fumihisa HANZAWA, Tatsuya NAKAMURA, Hideaki SHIROTORI, John F. VAN DERLOFSKE, III