Patents by Inventor Chunji Hong

Chunji Hong 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).

  • Method for designing lens of lighting device
    Patent number: 9589077
    Abstract: A method for designing a lens of a lighting device having a first spherical surface refracting light generated from an LED device that is a light source and a second spherical surface refracting the light passing through the first spherical surface includes determining an irradiation surface that is an area onto which light passing through the second spherical surface is irradiated, forming a reference circle disposed within the irradiation surface; designing a free curved surface of the first spherical surface by using light emitted from the LED device as an input direction vector and a coordinate within the reference circle as an output direction vector to calculate normal vectors, and designing a free curved surface of the second spherical surface by using light refracted by the first spherical surface as an input direction vector and a coordinate within the irradiation surface as an output direction vector to calculate normal vectors.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: March 7, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunjung Park, Chunji Hong, Junwon Lee
  • METHOD FOR DESIGNING LENS OF LIGHTING DEVICE
    Publication number: 20150370925
    Abstract: A method for designing a lens of a lighting device having a first spherical surface refracting light generated from an LED device that is a light source and a second spherical surface refracting the light passing through the first spherical surface includes determining an irradiation surface that is an area onto which light passing through the second spherical surface is irradiated, forming a reference circle disposed within the irradiation surface; designing a free curved surface of the first spherical surface by using light emitted from the LED device as an input direction vector and a coordinate within the reference circle as an output direction vector to calculate normal vectors, and designing a free curved surface of the second spherical surface by using light refracted by the first spherical surface as an input direction vector and a coordinate within the irradiation surface as an output direction vector to calculate normal vectors.
    Type: Application
    Filed: June 19, 2015
    Publication date: December 24, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Sunjung Park, Chunji Hong, Junwon Lee