Patents by Inventor Petri MYÖHÄNEN

Petri MYÖHÄNEN 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).

  • Exit pupil expander
    Patent number: 11892623
    Abstract: There is provided an exit pupil expander (EPE) for use in a diffractive display, the EPE comprising a plurality of diffractive zones on a waveguide and a plurality of non-diffractive zones between at least some of the diffractive zones.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: February 6, 2024
    Assignee: DISPELIX OY
    Inventors: Juuso Olkkonen, Petri Myöhänen
  • Diffractive display element with grating mirror
    Patent number: 11650427
    Abstract: There is provided a diffractive display element comprising a waveguide body, an in-coupling region for diffractively coupling light into the waveguide body, and an out-coupling region for diffractively coupling light out of the waveguide body, said light being adapted to propagate from said in-coupling region to the out-coupling region along a primary route. According to the invention, the element further comprises at least one grating mirror outside said primary route for diffractively mirroring light strayed from said primary route back to said primary route. The invention allows for increasing the efficiency of waveguide-based personal displays.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: May 16, 2023
    Assignee: DISPELIX OY
    Inventors: Juuso Olkkonen, Petri Myöhänen
  • DIFFRACTIVE DISPLAY ELEMENT WITH GRATING MIRROR
    Publication number: 20210215942
    Abstract: There is provided a diffractive display element comprising a waveguide body, an in-coupling region for diffractively coupling light into the waveguide body, and an out-coupling region for diffractively coupling light out of the waveguide body, said light being adapted to propagate from said in-coupling region to the out-coupling region along a primary route. According to the invention, the element further comprises at least one grating mirror outside said primary route for diffractively mirroring light strayed from said primary route back to said primary route. The invention allows for increasing the efficiency of waveguide-based personal displays.
    Type: Application
    Filed: January 30, 2019
    Publication date: July 15, 2021
    Applicant: DISPELIX OY
    Inventors: Juuso OLKKONEN, Petri MYÖHÄNEN
  • EXIT PUPIL EXPANDER
    Publication number: 20210072534
    Abstract: There is provided an exit pupil expander (EPE) for use in a diffractive display, the EPE comprising a plurality of diffractive zones on a waveguide and a plurality of non-diffractive zones between at least some of the diffractive zones.
    Type: Application
    Filed: February 19, 2019
    Publication date: March 11, 2021
    Applicant: DISPELIX OY
    Inventors: Juuso OLKKONEN, Petri MYÖHÄNEN