Patents by Inventor Chi Wook An

Chi Wook An 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: 20260202974
    Abstract: For a memory system and a method of operating the same, when a sudden power-off (SPO) event occurs after multi-bit data are foggy-programmed into at least one open memory block included in a non-volatile memory device included in the memory system, the memory system may operate to convert backup-target multi-bit data stored in a plurality of backup-target memory cells included in the at least one open memory block into 1-bit backup data based on corresponding threshold voltage distribution information, group at least two pieces of the 1-bit backup data to generate at least one piece of multi-bit backup data, and store the at least one piece of multi-bit backup data in the non-volatile memory device.
    Type: Application
    Filed: January 14, 2026
    Publication date: July 16, 2026
    Applicant: SK hynix Inc.
    Inventors: Jong Wook KIM, Jae Sung SIM, Hyun Young SHIM, Chi Wook AN
  • Patent number: 12684999
    Abstract: A light emitting display device and its manufacturing method are presented. The device includes: a substrate; a pixel circuit unit positioned on the substrate; a light emitting diode (LED) electrically connected to the pixel circuit unit; an encapsulation layer covering the pixel circuit unit and the light emitting diode (LED); a light blocking layer disposed on the encapsulation layer and having a first opening, a second opening, and a third opening; a first color filter including a main part in the first opening and an overlapping part connecting adjacent main parts and covering the light blocking layer; a second color filter in the second opening; and a third color filter in the third opening.
    Type: Grant
    Filed: January 6, 2022
    Date of Patent: July 14, 2026
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyeon Bum Lee, Hye Kyung Park, Chi Wook An, Hyun Duck Cho
  • Patent number: 12628524
    Abstract: A display device includes pixel electrodes disposed on a substrate; a pixel defining layer disposed on the pixel electrodes that include pixel openings overlapping the pixel electrodes in a plan view, respectively; an encapsulation layer disposed on the pixel electrodes and the pixel defining layer; a sensing electrode disposed on the encapsulation layer; a first insulating layer disposed on the sensing electrode that has openings overlapping the pixel openings in a plan view, respectively; and a second insulating layer disposed on the first insulating layer that has a higher refractive index than a refractive index of the first insulating layer, and each of the openings of the first insulating layer includes at least one protruding extension, and protruding directions of the at least one protruding extension formed in each of the openings include at least eight directions.
    Type: Grant
    Filed: March 23, 2023
    Date of Patent: May 12, 2026
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung-Hyun Cho, Gun Woo Ko, Chi Wook An, Beohm Rock Choi
  • Patent number: 12628525
    Abstract: A display device includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode is defined, an encapsulation layer disposed on the pixel electrode and the bank layer, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer. The opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other and a first extension part disposed at a portion where the first edge and the second edge meet.
    Type: Grant
    Filed: October 24, 2024
    Date of Patent: May 12, 2026
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Hyun Cho, Kang Wook Heo, Chi Wook An, Won Hak Choi
  • Patent number: 12568749
    Abstract: A display device according to an embodiment includes: a substrate; a light emitting element which is disposed on the substrate, and includes a first electrode, an emission layer, and a second electrode; a reflective layer which is disposed on the light emitting element, and includes an inorganic material; an encapsulation layer which is disposed on the reflective layer; a light blocking layer which is disposed on the encapsulation layer, and defines an opening overlapping the emission layer in a plan view; a reflection adjusting layer which is disposed on the light blocking layer; and a first organic layer which is disposed on the reflection adjusting layer, and defines an opening overlapping the emission layer in the plan view.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: March 3, 2026
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyeon Bum Lee, Chi Wook An, Jung-Hyun Cho
  • Publication number: 20260056626
    Abstract: A display device includes a substrate having a light emission area, a light emitting element layer including a light emitting element on the light emission area, and an sensing layer on the light emitting element layer and including a sensing electrode having a first opening overlapping the light emission area, a first refraction layer directly on the sensing electrode and having a second opening overlapping the light emission area, and a second refraction layer on the light emitting element layer and the first refraction layer, a first optical refractive index of the first refraction layer being less than a second optical refraction index of the second refraction layer.
    Type: Application
    Filed: November 3, 2025
    Publication date: February 26, 2026
    Inventors: Hyeong Jun KIM, Ji Ryun PARK, Chi Wook AN, Mi Ran JI
  • Patent number: 12461620
    Abstract: A display device includes a pixel defining layer on a substrate and having a first opening defining a light emission area, a light emitting element layer in the light emission area and including an anode electrode, a sensing electrode on the pixel defining layer and having a second opening overlapping the first opening, and a first organic layer covering the sensing electrode and having a third opening overlapping the first opening, wherein a width of the second opening is greater than a width of the first opening in a plan view.
    Type: Grant
    Filed: July 5, 2024
    Date of Patent: November 4, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyeong Jun Kim, Ji Ryun Park, Chi Wook An, Mi Ran Ji
  • Publication number: 20250221292
    Abstract: A light emitting display device includes: a flexible substrate including a display area and a peripheral area having a bending area. The display area includes: a plurality of inorganic layers; first and second organic layers that are disposed on the plurality of inorganic layers; a black pixel defining layer that is disposed on the second organic layer; and a spacer that is disposed on the black pixel defining layer. In the bending area, the plurality of inorganic layers include a first opening formed at a position corresponding to the bending area. The first opening is filled with the first organic layer, the second organic layer is disposed on the first organic layer, the black pixel defining layer includes a second opening at a position corresponding to the bending area, and the second opening is filled with an organic layer for the spacer, formed of a same material as the spacer.
    Type: Application
    Filed: March 18, 2025
    Publication date: July 3, 2025
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hyeon Bum LEE, Seong Min WANG, Chi Wook AN
  • Publication number: 20250204184
    Abstract: A light emitting display device includes a substrate including a display area and a non-display area adjacent to the display area; a lower pad electrode on the substrate in the non-display area; a planarization layer overlapping the lower electrode; an upper pad electrode on the lower pad electrode and overlapping at least a portion of the lower planarization layer. The planarization layer includes an opening exposing an upper surface of the lower pad electrode, the lower pad electrode and the upper pad electrode are electrically connected to each other through the opening, the lower planarization layer includes an exposed portion exposing an upper surface of the lower planarization layer, and an overlapping portion overlapping at least a portion of the upper pad electrode, and a height of the upper surface of the exposed portion is lower than a height of an upper surface of the overlapping portion.
    Type: Application
    Filed: March 4, 2025
    Publication date: June 19, 2025
    Applicant: Samsung Display Co., Ltd.
    Inventors: Chi Wook AN, Seong Min CHO, Mi-Ran JI, Chan Young KIM, Yeong Ho LEE
  • Patent number: 12279482
    Abstract: A light emitting display device includes: a flexible substrate including a display area and a peripheral area having a bending area. The display area includes: a plurality of inorganic layers; first and second organic layers that are disposed on the plurality of inorganic layers; a black pixel defining layer that is disposed on the second organic layer; and a spacer that is disposed on the black pixel defining layer. In the bending area, the plurality of inorganic layers include a first opening formed at a position corresponding to the bending area. The first opening is filled with the first organic layer, the second organic layer is disposed on the first organic layer, the black pixel defining layer includes a second opening at a position corresponding to the bending area, and the second opening is filled with an organic layer for the spacer, formed of a same material as the spacer.
    Type: Grant
    Filed: March 20, 2022
    Date of Patent: April 15, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyeon Bum Lee, Seong Min Wang, Chi Wook An
  • Patent number: 12262601
    Abstract: A light emitting display device includes a substrate including a display area and a non-display area adjacent to the display area; a lower pad electrode on the substrate in the non-display area; a planarization layer overlapping the lower electrode; an upper pad electrode on the lower pad electrode and overlapping at least a portion of the lower planarization layer. The planarization layer includes an opening exposing an upper surface of the lower pad electrode, the lower pad electrode and the upper pad electrode are electrically connected to each other through the opening, the lower planarization layer includes an exposed portion exposing an upper surface of the lower planarization layer, and an overlapping portion overlapping at least a portion of the upper pad electrode, and a height of the upper surface of the exposed portion is lower than a height of an upper surface of the overlapping portion.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: March 25, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Chi Wook An, Seong Min Cho, Mi-Ran Ji, Chan Young Kim, Yeong Ho Lee
  • Patent number: 12245467
    Abstract: A display device includes a pixel electrode, a wall layer, an emission layer, a touch electrode, and a light blocking member. The wall layer includes an opening exposing the pixel electrode. The emission layer overlaps the pixel electrode. The light blocking member overlaps the touch electrode and includes a first opening and a second opening each exposing the emission layer. A first perimeter section of the first opening is spaced from a first perimeter section of the opening by a first distance in a first direction in a plan view of the display device. A second perimeter section of the first opening is spaced from a second perimeter section of the opening by a second distance in a second direction in the plan view. The second distance is equal to the first distance. The second direction is at 45 degrees relative to the first direction.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: March 4, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyeon Bum Lee, Hyun Duck Cho, Chi Wook An
  • Publication number: 20250069663
    Abstract: A memory device includes: a plurality of memory cells; a peripheral circuit for performing a program operation of storing data in the plurality of memory cells; and a program operation control circuit for, in the program operation, controlling the peripheral circuit to perform a foggy program operation of increasing a threshold voltage of the plurality of memory cells to a threshold voltage corresponding to any one state among an erase state and first to sixth foggy program states, and perform a fine program operation of increasing the threshold voltage of the plurality of memory cells to any one state among the erase state and first to fifteenth fine program states.
    Type: Application
    Filed: April 11, 2024
    Publication date: February 27, 2025
    Applicant: SK hynix Inc.
    Inventor: Chi Wook AN
  • Publication number: 20250057002
    Abstract: A display device includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode is defined, an encapsulation layer disposed on the pixel electrode and the bank layer, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer. The opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other and a first extension part disposed at a portion where the first edge and the second edge meet.
    Type: Application
    Filed: October 24, 2024
    Publication date: February 13, 2025
    Inventors: Jung-Hyun CHO, Kang Wook HEO, Chi Wook AN, Won Hak CHOI
  • Patent number: 12213365
    Abstract: A display device includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode is defined, an encapsulation layer disposed on the pixel electrode and the bank layer, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer which is disposed on the first insulating layer and has a higher refractive index than a refractive index of the first insulating layer, where a side inclination angle of the first insulating layer in the opening of the first insulating layer is different depending on a position of the opening of the first insulating layer.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: January 28, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Hyun Cho, Chi Wook An, Kang Wook Heo
  • Patent number: 12198646
    Abstract: A display device includes a substrate, a pixel emitting light, a light blocking layer blocking light, a first pixel row comprising a first pixel group and a second pixel group in a first direction in a plan view, and a second pixel row in a second direction that intersects the first direction and comprising a third pixel group and a fourth pixel group in the first direction. The first pixel group includes a first sub-pixel, a second sub-pixel in a third direction from the first sub-pixel, the third direction intersecting the first direction, and a third sub-pixel in the first direction from the first sub-pixel. The third pixel group may include a sixth sub-pixel, a seventh sub-pixel in the third direction from the sixth sub-pixel, and an eighth sub-pixel in the first direction from the sixth sub-pixel. The third pixel group may be surrounded by the light blocking layer.
    Type: Grant
    Filed: November 7, 2022
    Date of Patent: January 14, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Chang Wook Kim, Chi Wook An, Gun Woo Ko, Soon Il Jung, Mi Ran Ji
  • Patent number: 12171131
    Abstract: A display device includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode is defined, an encapsulation layer disposed on the pixel electrode and the bank layer, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer. The opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other and a first extension part disposed at a portion where the first edge and the second edge meet.
    Type: Grant
    Filed: March 16, 2023
    Date of Patent: December 17, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Hyun Cho, Kang Wook Heo, Chi Wook An, Won Hak Choi
  • Publication number: 20240365583
    Abstract: A display device includes a substrate having a light emission area, a light emitting element layer including a light emitting element on the light emission area, and an sensing layer on the light emitting element layer and including a sensing electrode having a first opening overlapping the light emission area, a first refraction layer directly on the sensing electrode and having a second opening overlapping the light emission area, and a second refraction layer on the light emitting element layer and the first refraction layer, a first optical refractive index of the first refraction layer being less than a second optical refraction index of the second refraction layer.
    Type: Application
    Filed: July 5, 2024
    Publication date: October 31, 2024
    Inventors: Hyeong Jun KIM, Ji Ryun PARK, Chi Wook AN, Mi Ran JI
  • Patent number: 12035567
    Abstract: A display device includes a substrate having a light emission area, a light emitting element layer including a light emitting element on the light emission area, and an sensing layer on the light emitting element layer and including a sensing electrode having a first opening overlapping the light emission area, a first refraction layer directly on the sensing electrode and having a second opening overlapping the light emission area, and a second refraction layer on the light emitting element layer and the first refraction layer, a first optical refractive index of the first refraction layer being less than a second optical refraction index of the second refraction layer.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: July 9, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyeong Jun Kim, Ji Ryun Park, Chi Wook An, Mi Ran Ji
  • Patent number: 12027209
    Abstract: A memory device comprises a plurality of memory cells each having a threshold voltage corresponding to any one of a plurality of program states according to target data to be stored by performing a program operation, page buffers configured to store data provided from a memory controller, a data conversion controller configured to control the page buffers to convert the data into the target data including a plurality of logical page bits and a program operation controller configured to perform the program operation to store the target data in the plurality of memory cells, wherein the plurality of logical page bits include at least one logical page bit distinguishing even program states from odd program states among the plurality of program states and remaining logical page bits other than the at least one logical page bit having a same value as at least one program state among adjacent program states.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: July 2, 2024
    Assignee: SK hynix Inc.
    Inventors: Jong Woo Kim, Chi Wook An, Un Sang Lee