Patents by Inventor Sang ah Gam

Sang ah Gam 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).

  • Patent number: 10175534
    Abstract: A compensation film includes a first retardation layer including a polymer having negative birefringence, and a second retardation layer including a liquid crystal having positive birefringence, where the first retardation layer has an in-plane retardation (Re1) of 320 nm to 1050 nm for incident light having wavelength of 550 nm, the second retardation layer has an in-plane retardation (Re2) of 180 nm to 910 nm for the incident light, an entire in-plane retardation (Re0) of the first and second retardation layers for the incident light is a difference between the in-plane retardations of the first and second retardation layers, an angle between slow axes of the first and second retardation layers is 85 to 95 degrees, and the entire in-plane retardation (Re0) of the first and second retardation layers for the wavelength of 450 nm, 550 nm and 650 nm satisfies Re0 (450 nm)<Re0 (550 nm)<Re0 (650 nm).
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 8, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung Jun Kim, Sang ah Gam, Myung Sup Jung, Hyun-Seok Choi
  • Patent number: 10139534
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: November 27, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG SDI CO., LTD.
    Inventors: Sang ah Gam, Hye Young Kong, Hyung Jun Kim, Hyun-Seok Choi, Myung Sup Jung
  • Patent number: 9986603
    Abstract: An optical film includes: a liquid crystal coating; and a base layer on the liquid crystal coating, wherein the liquid crystal coating has reversed wavelength dispersion and in-plane retardation for a reference wavelength ranging from 126 nm to 153 nm, and the base layer has in-plane retardation ranging from about 0 to about 50 nm and out-of-plane retardation ranging from about 0 nm to about 100 nm.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: May 29, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CHEIL INDUSTRIES INC.
    Inventors: Hee-Kyung Kim, Moon Yeon Lee, Kyoung Ah Oh, Kyu Yeol In, Ji-Hoon Lee, Myung Sup Jung, Sang ah Gam
  • Publication number: 20180143362
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Application
    Filed: November 29, 2017
    Publication date: May 24, 2018
    Inventors: Sang ah GAM, Hye Young KONG, Hyung Jun KIM, Hyun-Seok CHOI, Myung Sup JUNG
  • Publication number: 20180081102
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Application
    Filed: November 29, 2017
    Publication date: March 22, 2018
    Inventors: Sang ah GAM, Hye Young KONG, Hyung Jun KIM, Hyun-Seok CHOI, Myung Sup JUNG
  • Patent number: 9835780
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: December 5, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG SDI CO., LTD
    Inventors: Sang ah Gam, Hye Young Kong, Hyung Jun Kim, Hyun-Seok Choi, Myung Sup Jung
  • Publication number: 20170303349
    Abstract: An optical film includes: a liquid crystal coating; and a base layer on the liquid crystal coating, wherein the liquid crystal coating has reversed wavelength dispersion and in-plane retardation for a reference wavelength ranging from 126 nm to 153 nm, and the base layer has in-plane retardation ranging from about 0 to about 50 nm and out-of-plane retardation ranging from about 0 nm to about 100 nm.
    Type: Application
    Filed: May 2, 2017
    Publication date: October 19, 2017
    Inventors: Hee-Kyung KIM, Moon Yeon LEE, Kyoung Ah OH, Kyu Yeol IN, Ji-Hoon LEE, Myung Sup JUNG, Sang ah GAM
  • Patent number: 9720280
    Abstract: A compensation film includes: a first retardation layer including a polymer; a second retardation layer including a liquid crystal having positive birefringence; and a compensation layer including a liquid crystal having a vertical alignment property, where an angle between slow axes of the first and second retardation layers is in a range of about 85 to about 95 degrees, an entire in-plane retardation (Re0) of the first retardation layer, the second retardation layer and the compensation layer for wavelengths of 450 nm, 550 nm and 650 nm satisfy the following inequation: Re0(450 nm)<Re0(550 nm)<Re0(650 nm), an in-plane retardation (Re3) of the compensation layer for the incident light having a wavelength of about 550 nm is in a range of about zero to about 50 nm, and a thickness direction retardation (Rth3) of the compensation layer for the incident light is less than zero.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 1, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung Jun Kim, Sang ah Gam, Myung Sup Jung, Hyun-Seok Choi
  • Patent number: 9661692
    Abstract: An optical film includes: a liquid crystal coating; and a base layer on the liquid crystal coating, wherein the liquid crystal coating has reversed wavelength dispersion and in-plane retardation for a reference wavelength ranging from 126 nm to 153 nm, and the base layer has in-plane retardation ranging from about 0 to about 50 nm and out-of-plane retardation ranging from about 0 nm to about 100 nm.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: May 23, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CHEIL INDUSTRIES INC.
    Inventors: Hee-Kyung Kim, Moon Yeon Lee, Kyoung Ah Oh, Kyu Yeol In, Ji-Hoon Lee, Myung Sup Jung, Sang ah Gam
  • Publication number: 20150378076
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Application
    Filed: June 26, 2015
    Publication date: December 31, 2015
    Inventors: Sang ah GAM, Hye Young KONG, Hyung Jun KIM, Hyun-Seok CHOI, Myung Sup JUNG
  • Publication number: 20150378075
    Abstract: An optical film includes a polarization film including a polymer resin and a dichroic dye, and a phase delay layer disposed on the polarization film and including a liquid crystal.
    Type: Application
    Filed: January 20, 2015
    Publication date: December 31, 2015
    Inventors: Sang ah GAM, Hye Young KONG, Hyung Jun KIM, Hyun-Seok CHOI, Myung Sup JUNG
  • Publication number: 20150131032
    Abstract: A compensation film includes a first retardation layer including a polymer having negative birefringence, and a second retardation layer including a liquid crystal having positive birefringence, where the first retardation layer has an in-plane retardation (Re1) of 320 nm to 1050 nm for incident light having wavelength of 550 nm, the second retardation layer has an in-plane retardation (Re2) of 180 nm to 910 nm for the incident light, an entire in-plane retardation (Re0) of the first and second retardation layers for the incident light is a difference between the in-plane retardations of the first and second retardation layers, an angle between slow axes of the first and second retardation layers is 85 to 95 degrees, and the entire in-plane retardation (Re0) of the first and second retardation layers for the wavelength of 450 nm, 550 nm and 650 nm satisfies Re0 (450 nm)<Re0 (550 nm)<Re0 (650 nm).
    Type: Application
    Filed: April 8, 2014
    Publication date: May 14, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung Jun KIM, Sang ah GAM, Myung Sup JUNG, Hyun-Seok CHOI
  • Publication number: 20150131031
    Abstract: A compensation film includes: a first retardation layer including a polymer; a second retardation layer including a liquid crystal having positive birefringence; and a compensation layer including a liquid crystal having a vertical alignment property, where an angle between slow axes of the first and second retardation layers is in a range of about 85 to about 95 degrees, an entire in-plane retardation (Re0) of the first retardation layer, the second retardation layer and the compensation layer for wavelengths of 450 nm, 550 nm and 650 nm satisfy the following inequation: Re0(450 nm)<Re0(550 nm)<Re0(650 nm), an in-plane retardation (Re3) of the compensation layer for the incident light having a wavelength of about 550 nm is in a range of about zero to about 50 nm, and a thickness direction retardation (Rth3) of the compensation layer for the incident light is less than zero.
    Type: Application
    Filed: March 13, 2014
    Publication date: May 14, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung Jun KIM, Sang ah Gam, Myung Sup JUNG, Hyun-Seok CHOI
  • Publication number: 20140184052
    Abstract: An optical film includes: a liquid crystal coating; and a base layer on the liquid crystal coating, wherein the liquid crystal coating has reversed wavelength dispersion and in-plane retardation for a reference wavelength ranging from 126 nm to 153 nm, and the base layer has in-plane retardation ranging from about 0 to about 50 nm and out-of-plane retardation ranging from about 0 nm to about 100 nm.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 3, 2014
    Applicants: CHEIL INDUSTRIES INC., SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-Kyung KIM, Moon Yeon LEE, Kyoung Ah OH, Kyu Yeol IN, Ji-Hoon LEE, Myung Sup JUNG, Sang ah Gam