Patents by Inventor Kyoo Choong Cho

Kyoo Choong Cho 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: 11822114
    Abstract: In the display device according to an embodiment, optical functional elements such as a prism sheet and a light diffusion layer are combined, and an optical composite sheet to which a light absorbing layer that selectively absorbs light of a specific wavelength band is inserted is used, so that the color gamut can be enhanced as compared with the prior art.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: November 21, 2023
    Assignee: SK MICROWORKS SOLUTIONS CO., LTD.
    Inventors: Kyoo Choong Cho, Tae Hoon Kim, Yong Jae Choe, Jae Ho Ko
  • Patent number: 11693173
    Abstract: An optical composite sheet is disclosed. In the optical composite sheet, optical functional elements such as a prism sheet and a light diffusion layer are combined, and a light absorbing layer that selectively absorbs light of a specific wavelength band is inserted, so that the optical performance and color gamut can be enhanced as compared with the prior art. In particular, the color transmittance of the optical composite sheet with respect to wavelength measured for each viewing angle satisfies a specific relationship, whereby it is possible to effectively reduce the color deviation with respect to the viewing angle.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: July 4, 2023
    Assignee: SK MICROWORKS SOLUTIONS CO., LTD.
    Inventors: Kyoo Choong Cho, Tae Hoon Kim, Yong Jae Choe, Jae Ho Ko
  • Publication number: 20220099869
    Abstract: In the optical sheet according to an embodiment, at least one organic dye that selectively absorbs light in a specific wavelength band is added to a prism pattern layer, whereby it is possible to provide an optical sheet by a simpler manufacturing process than before, in which the color gamut is enhanced while a decrease in luminance due to light absorption is minimized. In addition, it is possible to secure optical and mechanical properties while preventing a degradation of organic dyes due to UV curing by adjusting the composition of the prism pattern layer.
    Type: Application
    Filed: May 26, 2021
    Publication date: March 31, 2022
    Applicant: SKC hi-tech & marketing Co., Ltd.
    Inventors: Hyo Gil Cha, Yong Jae Choe, Tae Hoon Kim, Kyoo Choong Cho
  • Publication number: 20220057566
    Abstract: An optical composite sheet is disclosed. In the optical composite sheet, optical functional elements such as a prism sheet and a light diffusion layer are combined, and a light absorbing layer that selectively absorbs light of a specific wavelength band is inserted, so that the optical performance and color gamut can be enhanced as compared with the prior art. In particular, the color transmittance of the optical composite sheet with respect to wavelength measured for each viewing angle satisfies a specific relationship, whereby it is possible to effectively reduce the color deviation with respect to the viewing angle.
    Type: Application
    Filed: July 22, 2021
    Publication date: February 24, 2022
    Applicant: SKC hi-tech & marketing Co., Ltd.
    Inventors: Kyoo Choong CHO, Tae Hoon KIM, Yong Jae CHOE, Jae Ho KO
  • Publication number: 20220057565
    Abstract: In the display device according to an embodiment, optical functional elements such as a prism sheet and a light diffusion layer are combined, and an optical composite sheet to which a light absorbing layer that selectively absorbs light of a specific wavelength band is inserted is used, so that the color gamut can be enhanced as compared with the prior art.
    Type: Application
    Filed: July 22, 2021
    Publication date: February 24, 2022
    Applicant: SKC hi-tech & marketing Co., Ltd.
    Inventors: Kyoo Choong CHO, Tae Hoon Kim, Yong Jae Choe, Jae Ho Ko
  • Publication number: 20220057549
    Abstract: In the optical composite sheet according to an embodiment, optical functional elements such as a prism sheet and a light diffusion layer are combined, and a light absorbing layer that selectively absorbs light of a specific wavelength band is inserted, so that the optical performance and color gamut can be enhanced as compared with the prior art. In particular, it is possible to minimize the decrease in luminance due to the absorption of light by the light absorbing layer while enhancing the color gamut by adjusting the lamination configuration of the optical composite sheet.
    Type: Application
    Filed: July 20, 2021
    Publication date: February 24, 2022
    Applicant: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Kyoo Choong CHO, Tae Hoon Kim, Yong Jae Choe, Jae Ho Ko
  • Patent number: 10247980
    Abstract: The present invention relates to a film capable of enhancing color purity and correcting brightness for a liquid crystal display device, and a liquid crystal display device comprising the same, and can provide a liquid crystal display device having enhanced color gamut and color purity by introducing, to the inside of an adhesive layer or a coating layer of the liquid crystal display device, a combination of an absorption dye for absorbing a specific wavelength band and a fluorescent dye absorbing a specific wavelength band and emitting light, thereby blocking unnecessary wavelengths except for RGB wavelengths.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 2, 2019
    Assignee: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Hong Youl Cho, Kyoo Choong Cho, Hyun Cheol Nam
  • Patent number: 10133110
    Abstract: The present invention relates to a color purity improvement film (a color gamut enhancing film) that can improve the color purity of a liquid crystal display device, and a liquid crystal display device having the same. According to the present invention, a liquid crystal display device that blocks unnecessary wavelengths other than RGB wavelengths so as to improve color gamut and color purity may be provided by introducing a combination of dyes that absorb a particular Wavelength band to the inside of an adhesion layer or a coating layer of a as liquid crystal display device.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: November 20, 2018
    Assignee: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Hong Youl Cho, Kyoo Choong Cho, Hyun Cheol Nam, Sue Yoen Lee
  • Patent number: 10048430
    Abstract: The present invention relates to a liquid crystal display comprising an absorption dye, wherein the liquid crystal display of the present invention may enhance color gamut and brightness by transmitting pure red, green, and blue (RGB) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: August 14, 2018
    Assignee: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Hong Youl Cho, Kyoo Choong Cho, Yong Jae Choe, Hyun Cheol Nam
  • Patent number: 10012787
    Abstract: The present disclosure relates to a liquid crystal display comprising K—Si—F-based phosphors and a color gamut enhancing film, wherein the liquid crystal display of the present invention can improve a color gamut by transmitting pure RGB wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: July 3, 2018
    Assignee: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Hong Youl Cho, Kyoo Choong Cho, Hyun Cheol Nam
  • Patent number: 9971191
    Abstract: The present invention relates to a liquid crystal display comprising a quantum dot sheet and a color gamut enhancing film, wherein the liquid crystal display of the present invention can improve a color gamut by transmitting pure RGB (red, green, and blue) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: May 15, 2018
    Assignee: SKC HI-TECH & MARKETING CO., LTD.
    Inventors: Hong Youl Cho, Kyoo Choong Cho, Hyun Cheol Nam
  • Publication number: 20170329179
    Abstract: The present invention relates to a film capable of enhancing color purity and correcting brightness for a liquid crystal display device, and a liquid crystal display device comprising the same, and can provide a liquid crystal display device having enhanced color gamut and color purity by introducing, to the inside of an adhesive layer or a coating layer of the liquid crystal display device, a combination of an absorption dye for absorbing a specific wavelength band and a fluorescent dye absorbing a specific wavelength band and emitting light, thereby blocking unnecessary wavelengths except for RGB wavelengths.
    Type: Application
    Filed: March 30, 2015
    Publication date: November 16, 2017
    Inventors: Hong Youl CHO, Kyoo Choong CHO, Hyun Cheol NAM
  • Publication number: 20170285247
    Abstract: The present disclosure relates to a liquid crystal display comprising K—Si—F-based phosphors and a color gamut enhancing film, wherein the liquid crystal display of the present invention can improve a color gamut by transmitting pure RGB wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 5, 2017
    Inventors: Hong Youl CHO, Kyoo Choong CHO, Hyun Cheol NAM
  • Publication number: 20170285248
    Abstract: The present invention relates to a liquid crystal display comprising an absorption dye, wherein the liquid crystal display of the present invention may enhance color gamut and brightness by transmitting pure red, green, and blue (RGB) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 5, 2017
    Inventors: Hong Youl CHO, Kyoo Choong CHO, Yong Jae CHOE, Hyun Cheol NAM
  • Publication number: 20170205646
    Abstract: The present invention relates to a colour purity improvement film (a color gamut enhancing film) that can improve the colour purity of a liquid crystal display device, and a liquid crystal display device having the same. According to the present invention, a liquid crystal display device that blocks unnecessary wavelengths other than RGB wavelengths so as to improve colour gamut and colour purity may be provided by introducing a combination of dyes that absorb a particular Wavelength band to the inside of an adhesion layer or a coating layer of a as liquid crystal display device.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 20, 2017
    Inventors: Hong Youl CHO, Kyoo Choong CHO, Hyun Cheol NAM, Sue Yoen LEE
  • Publication number: 20170205664
    Abstract: The present invention relates to a liquid crystal display comprising a quantum dot sheet and a color gamut enhancing film, wherein the liquid crystal display of the present invention can improve a color gamut by transmitting pure RGB (red, green, and blue) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.
    Type: Application
    Filed: January 17, 2017
    Publication date: July 20, 2017
    Inventors: Hong Youl CHO, Kyoo Choong CHO, Hyun Cheol NAM
  • Publication number: 20080230173
    Abstract: A plasma display panel (PDP) filter having a high transparency and no exterior defect can be simply prepared by a method comprising the steps of a) laminating a conductive mesh film having a metallic mesh layer formed on a base film, on a transparent glass substrate such that the base film of the conductive mesh film comes in contact with the transparent glass substrate, to obtain laminate A; b) forming a transparent adhesive layer on one surface of an optic film, to obtain laminate B; c) laminating laminate A and laminate B such that the adhesive layer of laminate B comes in contact with the metallic mesh layer of laminate A, to obtain laminate C; and d) heating and pressing laminate C in an autoclave to allow the adhesive layer of laminate B attach to the metallic mesh layer of laminate A.
    Type: Application
    Filed: March 31, 2005
    Publication date: September 25, 2008
    Inventors: Kyoo Choong Cho, Chan Hong Park, Pyung Guk Park
  • Publication number: 20080160263
    Abstract: The present invention relates to a method for fabricating a front filter for a plasma display panel (PDP). In particular, the present invention relates to a front filter for a PDP comprising functional films including a conductive mesh film (2) having a black treated layer (2a), an optical film (1c) and an antireflection film (4) laminated on a glass substrate (3), wherein a transparent glass substrate (3) is used without a black ceramic stripe, which is formed at the rear side of the glass substrate (3) to improve visibility. Instead, composition and thickness of the oxide film forming the black treated layer (2a) of the conductive mesh film (2) are adjusted to attain comparable or better visibility, as compared with conventional filters. The minimized one-step fabricating process of the present invention provides advantages in terms of cost effectiveness and environment friendliness.
    Type: Application
    Filed: May 24, 2006
    Publication date: July 3, 2008
    Inventors: Kyoo Choong Cho, Chan Hong Park, Byong Kook Park