Patents by Inventor Sung Kwak

Sung Kwak 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: 20240067056
    Abstract: The present disclosure relates to a vehicle rear seat including: a center seat; and side seats located on the left and right of the center seat, wherein, the center seat is capable of protruding by moving the center seat forward with respect to the side seats, and in the state in which the center seat protrudes forward, it is possible to increase an inter-passenger distance so that physical contact between the passenger of the center seat and the passenger of each of the side seats can be prevented as much as possible.
    Type: Application
    Filed: March 6, 2023
    Publication date: February 29, 2024
    Inventors: Jung Sang You, Yong Chul Kim, Dae Hee Lee, Eun Sue Kim, Jae Hoon Cho, Han Kyung Park, Jae Sung Shin, Hae Dong Kwak, Jun Sik Hwang, Gwon Hwa Bok
  • Patent number: 11889740
    Abstract: An organic light-emitting diode (OLED) deposition system includes two deposition chambers, a transfer chamber between the two deposition chambers, a metrology system having one or more sensors to perform measurements of the workpiece within the transfer chamber, and a control system to cause the system to form an organic light-emitting diode layer stack on the workpiece. Vacuum is maintained around the workpiece while the workpiece is transferred between the two deposition chambers and while retaining the workpiece within the transfer chamber. The control system is configured to cause the two deposition chambers to deposit two layers of organic material onto the workpiece, and to receive a first plurality of measurements of the workpiece in the transfer chamber from the metrology system.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: January 30, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Yeishin Tung, Byung Sung Kwak, Robert Jan Visser, Gangadhar Banappanavar, Dinesh Kabra
  • Patent number: 11855241
    Abstract: A light-emitting device includes a plurality of light-emitting diodes, a first cured composition over a first subset of the light-emitting diodes, and a second cured composition over a second subset of light-emitting diodes. The first cured composition includes a first photopolymer and a blue photoluminescent material that is an organic, organometallic, or polymeric material, embedded in the first photopolymer. The second cured composition includes a second photopolymer and a nanomaterial embedded in the second photopolymer. The nanomaterial is selected to emit red or green light in response.
    Type: Grant
    Filed: July 21, 2022
    Date of Patent: December 26, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
  • Patent number: 11856833
    Abstract: An organic light-emitting diode (OLED) deposition system includes two deposition chambers, a transfer chamber between the two deposition chambers, a metrology system having one or more sensors to perform measurements of the workpiece within the transfer chamber, and a control system to cause the system to form an organic light-emitting diode layer stack on the workpiece. Vacuum is maintained around the workpiece while the workpiece is transferred between the two deposition chambers and while retaining the workpiece within the transfer chamber. The control system is configured to cause the two deposition chambers to deposit two layers of organic material onto the workpiece, and to receive a first plurality of measurements of the workpiece in the transfer chamber from the metrology system.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: December 26, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Yeishin Tung, Byung Sung Kwak, Robert Jan Visser, Guoheng Zhao, Todd J. Egan, Dinesh Kabra, Gangadhar Banappanavar
  • Publication number: 20230320139
    Abstract: Embodiments of the present disclosure generally relate to electroluminescent devices, such as organic light-emitting diodes, and displays including electroluminescent devices. In an embodiment is provided an electroluminescent device that includes a pixel defining layer, an organic emitting unit disposed over at least a portion of the pixel defining layer, and a filler layer disposed over at least a portion of the organic emitting unit, wherein a refractive index of the pixel defining layer is lower than a refractive index of the filler layer, and wherein the refractive index of the pixel defining layer is lower than a refractive index of one or more layers of the organic emitting unit. In another embodiment is provided a display device that includes a substrate, a thin film transistor formed on the substrate, an interconnection electrically coupled to the thin film transistor, and an electroluminescent device electrically coupled to the interconnection.
    Type: Application
    Filed: September 21, 2020
    Publication date: October 5, 2023
    Inventors: Chung-chia CHEN, Wan-Yu LIN, Hyunsung BANG, Lisong XU, Gang YU, Byung-Sung KWAK, Robert Jan VISSER, Chung-Chih WU, Hoang Yan LIN, Guo-Dong SU, Wei-Kai LEE, Yi-Jiun CHEN, Ting-Sheng HSU, Po-Hsiang LIAO, Wei-Cheng LIN
  • Publication number: 20230320183
    Abstract: An organic light-emitting diode (OLED) deposition system includes two deposition chambers, a transfer chamber between the two deposition chambers, a metrology system having one or more sensors to perform measurements of the workpiece within the transfer chamber, and a control system to cause the system to form an organic light-emitting diode layer stack on the workpiece. Vacuum is maintained around the workpiece while the workpiece is transferred between the two deposition chambers and while retaining the workpiece within the transfer chamber. The control system is configured to cause the two deposition chambers to deposit two layers of organic material onto the workpiece, and to receive a first plurality of measurements of the workpiece in the transfer chamber from the metrology system.
    Type: Application
    Filed: June 8, 2023
    Publication date: October 5, 2023
    Inventors: Yeishin Tung, Byung Sung Kwak, Robert Jan Visser, Gangadhar Banappanavar, Dinesh Kabra
  • Publication number: 20230266247
    Abstract: An apparatus for determining a characteristic of a photoluminescent (PL) layer comprises: a light source that generates an excitation light that includes light from the visible or near-visible spectrum; an optical assembly configured to direct the excitation light onto a PL layer; a detector that is configured to receive a PL emission generated by the PL layer in response to the excitation light interacting with the PL layer and generate a signal based on the PL emission; and a computing device coupled to the detector and configured to receive the signal from the detector and determine a characteristic of the PL layer based on the signal.
    Type: Application
    Filed: March 31, 2023
    Publication date: August 24, 2023
    Inventors: Avishek GHOSH, Byung-Sung KWAK, Todd EGAN, Robert Jan VISSER, Gangadhar BANAPPANAVAR, Dinesh KABRA
  • Publication number: 20230247857
    Abstract: An organic light-emitting diode (OLED) device includes a substrate, a well structure on the substrate with the well structure having a recess with side walls and a floor, a lower metal layer covering the floor and side-walls of the well, an upper conductive layer on the lower metal layer covering the floor of the well and contacting the lower metal layer, the upper conductive layer having outer edges at about an intersection of the side walls and the floor, a dielectric layer formed of an oxide of the lower metal layer covering the side walls of the well without covering the upper conductive layer, a stack of OLED layers covering at least the floor of the well, the upper conductive layer providing an electrode for the stack of OLED layers, and a light extraction layer (LEL) in the well over the stack of OLED layers and the dielectric layer.
    Type: Application
    Filed: April 7, 2023
    Publication date: August 3, 2023
    Inventors: Gang Yu, Chung-Chia Chen, Wan-Yu Lin, Hyunsung Bang, Lisong Xu, Byung Sung Kwak, Robert Jan Visser
  • Patent number: 11713506
    Abstract: A depositing arrangement for evaporation of a material is disclosed herein. The depositing arrangement has an alkali metal or alkaline earth metal for deposition of the material on a substrate. The deposition arrangement has a first chamber configured for liquefying the material; a valve being in fluid communication with the first chamber, and being downstream of the first chamber, wherein the valve is configured for control of the flow rate of the liquefied material through the valve. The deposition arrangement has an evaporation zone being in fluid communication with the valve, and being downstream of the valve, wherein the evaporation zone is configured for vaporizing the liquefied material; a heating unit to heat the material to higher temperatures before providing the liquid material in the evaporation zone; and one or more outlets for directing the vaporized material towards the substrate.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: August 1, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Stefan Keller, Uwe Schüssler, Jose Manuel Dieguez-Campo, Stefan Bangert, Byung-Sung Kwak
  • Patent number: 11662317
    Abstract: An apparatus for determining a characteristic of a photoluminescent (PL) layer comprises: a light source that generates an excitation light that includes light from the visible or near-visible spectrum; an optical assembly configured to direct the excitation light onto a PL layer; a detector that is configured to receive a PL emission generated by the PL layer in response to the excitation light interacting with the PL layer and generate a signal based on the PL emission; and a computing device coupled to the detector and configured to receive the signal from the detector and determine a characteristic of the PL layer based on the signal.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: May 30, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Avishek Ghosh, Byung-Sung Kwak, Todd Egan, Robert Jan Visser, Gangadhar Banappanavar, Dinesh Kabra
  • Patent number: 11659759
    Abstract: Embodiments of the present disclosure relate to an apparatus and methods for forming arrays of EL devices and forming the EL devices with overlapped mask plates. The methods utilize overlapping a first mask plate and a second mask plate to form a mask arrangement having first apertures of the first mask plate overlapped with second apertures of the second mask plate forming one or more opening areas. A material is evaporated through the mask arrangement such that layers of the material are formed in a device area of the EL devices. The device area of each of the EL devices corresponds to the opening area of the mask arrangement of the first mask plate and the second mask plate. The method described herein allows for a higher density of the EL devices and creates a smaller deposition area due to the opening area of the mask arrangement.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: May 23, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Chung-Chia Chen, Byung-Sung Kwak, Robert Jan Visser
  • Patent number: 11626577
    Abstract: An organic light-emitting diode (OLED) device includes a substrate, a well structure on the substrate with the well structure having a recess with side walls and a floor, a lower metal layer covering the floor and side-walls of the well, an upper conductive layer on the lower metal layer covering the floor of the well and contacting the lower metal layer, the upper conductive layer having outer edges at about an intersection of the side walls and the floor, a dielectric layer formed of an oxide of the lower metal layer covering the side walls of the well without covering the upper conductive layer, a stack of OLED layers covering at least the floor of the well, the upper conductive layer providing an electrode for the stack of OLED layers, and a light extraction layer (LEL) in the well over the stack of OLED layers and the dielectric layer.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: April 11, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Gang Yu, Chung-Chia Chen, Wan-Yu Lin, Hyunsung Bang, Lisong Xu, Byung Sung Kwak, Robert Jan Visser
  • Publication number: 20230105225
    Abstract: Exemplary subpixel structures include a directional light-emitting diode structure characterized by a full-width-half-maximum (FWHM) of emitted light having a divergence angle of less than or about 10°. The subpixel structure further includes a lens positioned a first distance from the light-emitting diode structure, where the lens is shaped to focus the emitted light from the light-emitting diode structure. The subpixel structure still further includes a patterned light absorption barrier positioned a second distance from the lens. The patterned light absorption barrier defines an opening in the barrier, and the focal point of the light focused by the lens is positioned within the opening. The subpixels structures may be incorporated into a pixel structure, and pixel structures may be incorporated into a display that is free of a polarizer layer.
    Type: Application
    Filed: October 4, 2021
    Publication date: April 6, 2023
    Applicant: Applied Materials, Inc.
    Inventors: Chung-Chih Wu, Po-Jui Chen, Hoang Yan Lin, Guo-Dong Su, Wei-Kai Lee, Chi-Jui Chang, Wan-Yu Lin, Byung Sung Kwak, Robert Jan Visser
  • Publication number: 20230109619
    Abstract: A light-emitting pixel structure is described that may include a group of light-emitting diode structures, where each of the light-emitting diode structures is operable to emit light characterized by a different peak emission wavelength. The structures may also include a patterned light absorption barrier characterized by a group of openings in the barrier, where each of the openings permit a transmission of a portion of the light from one of the light-emitting diode structures through the barrier. The structures may further include a metasurface layer operable to change a direction of at least some of the light transmitted through the openings of the patterned light absorption barrier from the light-emitting diode structures.
    Type: Application
    Filed: October 4, 2021
    Publication date: April 6, 2023
    Applicant: Applied Materials, Inc.
    Inventors: Chung-Chih Wu, Po-Jui Chen, Hoang Yan Lin, Guo-Dong Su, Wei-Kai Lee, Wan-Yu Lin, Byung Sung Kwak, Robert Jan Visser, Chi-Jui Chang
  • Publication number: 20220399479
    Abstract: Methods of making high-pixel-density LED structures are described. The methods may include forming a backplane substrate and a LED substrate. The backplane substrate and the LED substrate may be bonded together, and the bonded substrates may include an array of LED pixels. Each of the LED pixels may include a group of isolated subpixels. A quantum dot layer may be formed on at least one of the isolated subpixels in each of the LED pixels. The methods may further include repairing at least one defective LED pixel by forming a replacement quantum dot layer on a quantum-dot-layer-free subpixel in the defective LED pixel. The methods may also include forming a UV barrier layer on the array of LED pixels after the repairing of the at least one defective LED pixel.
    Type: Application
    Filed: June 11, 2021
    Publication date: December 15, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lisong Xu, Mingwei Zhu, Byung Sung Kwak, Hyunsung Bang, Liang Zhao, Hou T. Ng, Sivapackia Ganapathiappan, Nag Patibandla
  • Publication number: 20220367763
    Abstract: A light-emitting device includes a plurality of light-emitting diodes, a first cured composition over a first subset of the light-emitting diodes, and a second cured composition over a second subset of light-emitting diodes. The first cured composition includes a first photopolymer and a blue photoluminescent material that is an organic, organometallic, or polymeric material, embedded in the first photopolymer. The second cured composition includes a second photopolymer and a nanomaterial embedded in the second photopolymer. The nanomaterial is selected to emit red or green light in response.
    Type: Application
    Filed: July 21, 2022
    Publication date: November 17, 2022
    Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
  • Publication number: 20220341722
    Abstract: An organic light-emitting diode (OLED) deposition system has a workpiece transport system configured to position a workpiece within the OLED deposition system under vacuum conditions, a deposition chamber configured to deposit a first layer of organic material onto the workpiece, a metrology system having one or more sensors measure of the workpiece after deposition in the deposition chamber, and a control system to control a deposition of the layer of organic material onto the workpiece. The metrology system includes a digital holographic microscope positioned to receive light from the workpiece and generate a thickness profile measurement of a layer on the workpiece. The control system is configured to adjust processing of a subsequent workpiece at the deposition chamber or adjust processing of the workpiece at a subsequent deposition chamber based on the thickness profile.
    Type: Application
    Filed: April 21, 2021
    Publication date: October 27, 2022
    Inventors: Yeishin Tung, Byung Sung Kwak, Robert Jan Visser
  • Publication number: 20220310575
    Abstract: A display screen includes a backplane, an array of light-emitting diodes electrically integrated with the backplane, the array of light-emitting diodes configured to emit UV light in a first wavelength range, and a plurality of isolation walls formed on the backplane between adjacent light-emitting diodes of the array of light-emitting diodes with the isolation walls spaced apart from the light-emitting diodes and extending above the light-emitting diodes. The plurality of isolation walls include a core of a first material and a coating covering at least a portion of the core extending above the light-emitting diodes. The coating is an opaque second material having transmittance less than 1% of light in the first wavelength range.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 29, 2022
    Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
  • Publication number: 20220310872
    Abstract: A method for manufacturing micro-LED displays includes depositing a first material over a substrate having a plurality of micro-LEDs such that the plurality of micro-LEDs are covered by the first material and the first material fills gaps laterally separating the micro-LEDs, removing a portion of the first material from the gaps that laterally separate the plurality of micro-LEDs to form trenches that extend to or below light-emitting layers of the micro-LEDs, depositing a second material over the substrate such that the second material covers the first material and extends into the trenches, and removing a portion of the first and second material over the plurality of micro-LEDs to expose top surfaces of the plurality of micro-LEDs and such that isolation walls positioned in the gaps between the plurality of micro-LEDs extend vertically higher than the top surface of the first material.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 29, 2022
    Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
  • Publication number: 20220293878
    Abstract: A light-emitting diode (LED) structure includes a light-emitting diode including an emissive electroluminescent layer situated between two electrodes, a light extraction layer (LEL) comprising a UV-cured ink, and a UV blocking layer between the LEL and the light-emitting diode. The UV blocking layer has a thickness of 50-500 nm and at least 90% absorption to UV light of wavelengths for curing the UV-cured ink.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 15, 2022
    Inventors: Gang Yu, Chung-Chia Chen, Wan-Yu Lin, Hyunsung Bang, Lisong Xu, Byung Sung Kwak, Robert Jan Visser