Patents by Inventor Kwang-Han Park

Kwang-Han Park 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: 20240138241
    Abstract: A display device includes a light emitting sub-pixel disposed in a display area, a light receiving pixel disposed in one of the display area or a non-display area, and a touch sensing layer including a sensing conductive layer overlapping with the light receiving pixel.
    Type: Application
    Filed: August 2, 2023
    Publication date: April 25, 2024
    Inventors: Jung Woo PARK, Kwang Soo BAE, Byung Han YOO, Dae Young LEE, Hyun Dae LEE
  • Publication number: 20240095484
    Abstract: Proposed is a dual band RFID tag including a first rectifier configured to receive and rectify a first RF signal modulated at a first frequency, a first regulator configured to regulate an output voltage of the first rectifier, a second rectifier configured to receive and rectify a second RF signal modulated at a second frequency, a second regulator configured to regulate an output voltage of the second rectifier, a voltage distributor connected to a first node and a ground in a state of being positioned therebetween, the output terminal of the first rectifier and the output terminal of the second rectifier being both connected to the first node, a multiplexer configured to output any one of an analog detection signal output from a sensor and an output signal of the voltage distributor, in response to a first selection signal or a second selection signal, and an analog-to-digital converter configured to receive as an operating voltage a voltage of a second node to which an output terminal of the first regulat
    Type: Application
    Filed: April 26, 2023
    Publication date: March 21, 2024
    Inventors: Sung Wan KIM, Pyeong Han LEE, Kwang Beom PARK, Sung Hun CHUN, Chang Ho RYU
  • Patent number: 11130838
    Abstract: The present specification provides a cardo-based binder resin represented by Chemical Formula 1, and a photosensitive resin composition, a black matrix, a color filter and a display apparatus including the same.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: September 28, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Doyun Lee, Kwang Han Park, Eunjoo Choi
  • Publication number: 20200181322
    Abstract: The present specification provides a cardo-based binder resin represented by Chemical Formula 1, and a photosensitive resin composition, a black matrix, a color filter and a display apparatus including the same.
    Type: Application
    Filed: February 1, 2019
    Publication date: June 11, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Doyun LEE, Kwang Han PARK, Eunjoo CHOI
  • Patent number: 10642150
    Abstract: The present invention relates to a photomask and a method for manufacturing a column spacer for a color filter using the same, and according to one aspect of the present invention, a photomask is provided, which comprises a central region having a first transmittance, a first perimeter region surrounding the central region and having a second transmittance lower than the first transmittance, and a second perimeter region surrounding the first perimeter region and having the first transmittance.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: May 5, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Dae Han Seo, Dong Chang Choi, Kwang Han Park, Sang Choll Han, Jae Jin Kim, Eun Joo Choi, Min Soo Song
  • Publication number: 20170285459
    Abstract: The present invention relates to a photomask and a method for manufacturing a column spacer for a color filter using the same, and according to one aspect of the present invention, a photomask is provided, which comprises a central region having a first transmittance, a first perimeter region surrounding the central region and having a second transmittance lower than the first transmittance, and a second perimeter region surrounding the first perimeter region and having the first transmittance.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Applicant: LG CHEM, LTD.
    Inventors: Dae Han SEO, Dong Chang Choi, Kwang Han Park, Sang Choll Han, Jae Jin Kim, Eun Joo Choi, Min Soo Song
  • Patent number: 9470975
    Abstract: The present specification relates to a photoresist resin composition, a touch panel including a bezel pattern manufactured by using the photoresist resin composition, and a display device including the bezel pattern manufactured by using the photoresist resin composition.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: October 18, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Dongchang Choi, Kwang Han Park, Kyung Soo Choi, Geun Young Cha, Sang Chul Lee, Heeyoung Oh
  • Patent number: 9341946
    Abstract: The present specification provides a photosensitive resin composition comprising an alkali-soluble binder, a crosslinkable compound, a photopolymerization initiator, a solvent, a coloring agent and an epoxy adhesion promoter. The photosensitive resin composition has excellent insulating properties and light-shielding properties and shows excellent chemical resistance in an etching process and a stripping process. Thus, the photosensitive resin composition can be formed into a thin bezel layer having a gradual taper, and thus can provide an integrated touch sensor that makes it possible to prevent short circuits from occurring in metal wiring and minimize any decrease in resistance resulting from high-temperature processing.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 17, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Kwang Han Park, Sunghyun Kim, Dongchang Choi, Kyung Soo Choi, Sang Chul Lee, Heeyoung Oh
  • Publication number: 20150125789
    Abstract: The present specification provides a photosensitive resin composition comprising an alkali-soluble binder, a crosslinkable compound, a photopolymerization initiator, a solvent, a coloring agent and an epoxy adhesion promoter. The photosensitive resin composition has excellent insulating properties and light-shielding properties and shows excellent chemical resistance in an etching process and a stripping process. Thus, the photosensitive resin composition can be formed into a thin bezel layer having a gradual taper, and thus can provide an integrated touch sensor that makes it possible to prevent short circuits from occurring in metal wiring and minimize any decrease in resistance resulting from high-temperature processing.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 7, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Kwang Han Park, Sunghyun Kim, Dongchang Choi, Kyung Soo Choi, Sang Chul Lee, Heeyoung Oh
  • Publication number: 20150111009
    Abstract: The present specification relates to a photoresist resin composition, a touch panel including a bezel pattern manufactured by using the photoresist resin composition, and a display device including the bezel pattern manufactured by using the photoresist resin composition.
    Type: Application
    Filed: April 17, 2013
    Publication date: April 23, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Dongchang Choi, Kwang Han Park, Kyung Soo Choi, Geun Young Cha, Sang Chul Lee, Heeyoung Oh
  • Patent number: 8951713
    Abstract: An alkali-soluble resin is provided. The alkali-soluble resin is prepared using a polyfunctional thiol compound as a chain transfer agent. The alkali-soluble resin has a lower viscosity than a resin having the same molecular weight. Further provided is a negative-type photosensitive resin composition comprising the alkali-soluble resin as a binder resin. The use of the alkali-soluble resin lowers the overall viscosity of the photosensitive resin composition to effectively reduce the height of a stepped portion of a photoresist pattern using a small amount of the photosensitive resin composition.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: February 10, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Han Soo Kim, Sung Hyun Kim, Kwang Han Park, Min Young Lim, Yoon Hee Heo, Ji Heum Yoo, Sun Hwa Kim
  • Patent number: 8791169
    Abstract: The present invention relates to a fluorene-based resin polymer, and a photosensitive resin composition including the same, and the fluorene-based resin polymer according to the exemplary embodiment of the present invention has a high molecular weight, a low acid value, and excellent developing property, adhesive property and stability.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 29, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Hee Heo, Kwang Han Park, Han Soo Kim, Changho Cho, Sunhwa Kim, Won Jin Chung
  • Patent number: 8357483
    Abstract: The present invention relates to a photosensitive resin composition that includes a polymer prepared by using a macromonomer as an alkali soluble resin. The photosensitive resin composition is used for various types of purposes such as a photoresist for preparing a color filter, an overcoat photoresist, a column spacer, and an insulating material having a light blocking property, and improves physical properties such as residue or not, chemical resistance, and heat resistance of the photoresist.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: January 22, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Han-Soo Kim, Min-Young Lim, Yoon-Hee Heo, Ji-Heum Yoo, Sung-Hyun Kim, Kwang-Han Park
  • Publication number: 20120196949
    Abstract: The present invention relates to a fluorene-based resin polymer, and a photosensitive resin composition including the same, and the fluorene-based resin polymer according to the exemplary embodiment of the present invention has a high molecular weight, a low acid value, and excellent developing property, adhesive property and stability.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Applicant: LG CHEM, LTD.
    Inventors: Yoon Hee HEO, Kwang Han PARK, Han Soo KIM, Changho CHO, Sunhwa KIM, Won Jin CHUNG
  • Publication number: 20100196824
    Abstract: An alkali-soluble resin is provided. The alkali-soluble resin is prepared using a polyfunctional thiol compound as a chain transfer agent. The alkali-soluble resin has a lower viscosity than a resin having the same molecular weight. Further provided is a negative-type photosensitive resin composition comprising the alkali-soluble resin as a binder resin. The use of the alkali-soluble resin lowers the overall viscosity of the photosensitive resin composition to effectively reduce the height of a stepped portion of a photoresist pattern using a small amount of the photosensitive resin composition.
    Type: Application
    Filed: October 6, 2008
    Publication date: August 5, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Han Soo Kim, Sung Hyun Kim, Kwang Han Park, Min Young Lim, Yoon Hee Heo, Ji Heum Yoo, Sun Hwa Kim
  • Publication number: 20100081089
    Abstract: The present invention relates to a photosensitive resin composition that includes a polymer prepared by using a macromonomer as an alkali soluble resin. The photosensitive resin composition is used for various types of purposes such as a photoresist for preparing a color filter, an overcoat photoresist, a column spacer, and an insulating material having a light blocking property, and improves physical properties such as residue or not, chemical resistance, and heat resistance of the photoresist.
    Type: Application
    Filed: April 11, 2008
    Publication date: April 1, 2010
    Inventors: Han-Soo Kim, Min-Young Lim, Yoon-Hee Heo, Ji-Heum Yoo, Sung-Hyun Kim, Kwang-Han Park