Patents by Inventor Jangmi KANG

Jangmi KANG 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: 12272298
    Abstract: A display apparatus includes a display panel, a gate driver, a data driver and an emission driver. The display panel includes a pixel. The gate driver is configured to provide a gate signal to the pixel. The data driver is configured to provide a data voltage to the pixel. The emission driver is configured to provide an emission signal to the pixel. The pixel includes a light emitting element, a driving switching element and a bias switching element. The driving switching element is configured to apply a driving current to the light emitting element. The bias switching element is configured to provide a bias voltage to an input electrode of the driving switching element. A frequency of a bias gate signal applied to a control electrode of the bias switching element is greater than a frequency of a data write gate signal applied to the pixel.
    Type: Grant
    Filed: February 19, 2024
    Date of Patent: April 8, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Junhyun Park, Jangmi Kang, Minjae Jeong
  • Patent number: 12254830
    Abstract: A pixel includes: a light emitting diode; a first transistor; a first capacitor connected between a first node and a gate electrode of the first transistor; a second transistor including a first electrode electrically connected to the gate electrode of the first transistor, a second electrode and a gate electrode which receives a first scan signal; and a third transistor including a first electrode electrically connected to the second electrode of the second transistor, a second electrode electrically connected to a third voltage line, and a gate electrode which receives a second scan signal. During an initialization period, an initialization voltage provided from the third voltage line is provided to the gate electrode of the first transistor through the third and second transistors, and, when the initialization period is terminated, at least one of the second transistor and the third transistor is turned off.
    Type: Grant
    Filed: November 28, 2023
    Date of Patent: March 18, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junhyun Park, Jangmi Kang, Minjae Jeong, Meehye Jung
  • Patent number: 12249282
    Abstract: A display device is disclosed that includes a first circuit including a driving transistor including a first electrode, a second electrode, a gate electrode, and a back gate electrode, a light emitting element including an anode and a cathode connected to the first circuit, and a second circuit including a first transistor connected between the back gate electrode of the driving transistor and a compensation voltage line, and a second transistor connected between the back gate electrode of the driving transistor and a first voltage line.
    Type: Grant
    Filed: June 9, 2023
    Date of Patent: March 11, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Byungchang Yu, Jangmi Kang, Myunghoon Park, Dong-Hoon Lee
  • Patent number: 12211430
    Abstract: A pixel circuit includes a light emitting element, a driving switching element, a storage capacitor, a data voltage applying switching element and a first leakage compensation switching element. The driving switching element is configured to apply a driving current to the light emitting element. The storage capacitor is connected to a control electrode of the driving switching element. The data voltage applying switching element is configured to apply a data voltage to the storage capacitor. The first leakage compensation switching element is disposed between the storage capacitor and the data voltage applying switching element.
    Type: Grant
    Filed: September 25, 2023
    Date of Patent: January 28, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junhyun Park, Hyeongseok Kim, Jangmi Kang, Minjae Jeong, Mukyung Jeon
  • Publication number: 20250022411
    Abstract: A pixel includes a light emitting element, a first transistor including a first electrode electrically connected to a first voltage line which supplies a first driving voltage, a second electrode electrically connected to the light emitting element, and a gate electrode connected to a first node, a second transistor connected between the first node and a second node and including a gate electrode connected to a first scan line, a third transistor connected between the second electrode of the first transistor and the second node and including a gate electrode connected to a second scan line, and a booting capacitor connected between the second node and the second scan line.
    Type: Application
    Filed: October 1, 2024
    Publication date: January 16, 2025
    Inventors: MINJAE JEONG, JANGMI KANG, HYEONGSEOK KIM, JUNHYUN PARK, MUKYUNG JEON
  • Publication number: 20250013326
    Abstract: A display apparatus including a sensor includes: a pixel group including a predetermined number of pixels, each of which includes a pixel circuit and a light-emitting device electrically connected to the pixel circuit; and a sensing pixel including a sensing circuit and a sensing electrode connected to the sensing circuit, where the sensing electrode forms a variable capacitor with respect to a finger, and the sensing circuit is arranged around the pixel circuit of the pixel group.
    Type: Application
    Filed: September 23, 2024
    Publication date: January 9, 2025
    Inventors: Jangmi Kang, Jisun Kim
  • Publication number: 20250008797
    Abstract: An electronic device includes a display panel including a plurality of pixels. Each of the plurality of pixels includes a light-emitting diode, a power line, an initialization voltage line, an initialization signal line, a bias voltage line, a transistor including a first gate in contact with the initialization signal line through a first contact and electrically connected between the initialization voltage line and the anode, and a transistor including a second gate in contact with the initialization signal line through a second contact and electrically connected between the power line and the bias voltage line. In a plan view, the initialization signal line does not overlap the power line.
    Type: Application
    Filed: September 16, 2024
    Publication date: January 2, 2025
    Inventors: JUNHYUN PARK, JANGMI KANG, MINJAE JEONG
  • Publication number: 20240404457
    Abstract: A pixel of a display device includes a first transistor including a top gate coupled to a first node, a first terminal, a second terminal coupled to a second node, and a bottom gate, a second transistor including a gate coupled to a writing signal line, a first terminal coupled to a data line, and a second terminal coupled to the first node, a storage capacitor coupled between the first node and the second node, a light emitting element coupled between the second node and a second power supply voltage line, and a seventh transistor including a gate coupled to an initialization signal line, a first terminal coupled to a bias voltage line, and a second terminal coupled to the bottom gate.
    Type: Application
    Filed: August 9, 2024
    Publication date: December 5, 2024
    Inventors: MINJAE JEONG, JANGMI KANG, HYEONGSEOK KIM, JUNHYUN PARK, MUKYUNG JEON
  • Patent number: 12124645
    Abstract: A display apparatus including a sensor includes: a pixel group including a predetermined number of pixels, each of which includes a pixel circuit and a light-emitting device electrically connected to the pixel circuit; and a sensing pixel including a sensing circuit and a sensing electrode connected to the sensing circuit, where the sensing electrode forms a variable capacitor with respect to a finger, and the sensing circuit is arranged around the pixel circuit of the pixel group.
    Type: Grant
    Filed: March 25, 2022
    Date of Patent: October 22, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jangmi Kang, Jisun Kim
  • Patent number: 12125425
    Abstract: A pixel may include a light emitting element; a data write transistor that writes a data voltage; a driving transistor that applies a driving current to the light emitting element based on the data voltage; a hold capacitor including a first electrode to which a first power supply voltage is applied, and a second electrode electrically connected to a first node; a storage capacitor including a first electrode electrically connected to the first node, and a second electrode electrically connected to a control electrode of the driving transistor; at least one polysilicon thin film transistor; and at least one oxide thin film transistor. The at least one oxide thin film transistor may be disposed between the at least one polysilicon thin film transistor and the hold capacitor, or between the at least one polysilicon thin film transistor and the storage capacitor.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: October 22, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junhyun Park, Jangmi Kang, Minjae Jeong
  • Patent number: 12112694
    Abstract: A pixel includes a light emitting element, a first transistor including a first electrode electrically connected to a first voltage line which supplies a first driving voltage, a second electrode electrically connected to the light emitting element, and a gate electrode connected to a first node, a second transistor connected between the first node and a second node and including a gate electrode connected to a first scan line, a third transistor connected between the second electrode of the first transistor and the second node and including a gate electrode connected to a second scan line, and a booting capacitor connected between the second node and the second scan line.
    Type: Grant
    Filed: September 28, 2023
    Date of Patent: October 8, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Minjae Jeong, Jangmi Kang, Hyeongseok Kim, Junhyun Park, Mukyung Jeon
  • Publication number: 20240334745
    Abstract: A display device includes a substrate including a display area, and a peripheral area surrounding the display area in plan view, a power line on the substrate, and overlapping the peripheral area, a pixel electrode on the substrate, overlapping the display area, and spaced apart from the power line, a light-emitting layer on the pixel electrode, and overlapping the display area, a common electrode on the light-emitting layer, and overlapping the display area, and a partition wall on the substrate, overlapping the display area and the peripheral area, directly contacting the common electrode in the display area, and directly contacting the power line in the peripheral area.
    Type: Application
    Filed: February 8, 2024
    Publication date: October 3, 2024
    Inventors: DONG-HOON LEE, JANGMI KANG, HAEMIN KIM, YOUNGWAN SEO, GEUNHO LEE
  • Patent number: 12106706
    Abstract: A pixel of a display device includes a first transistor including a top gate coupled to a first node, a first terminal, a second terminal coupled to a second node, and a bottom gate, a second transistor including a gate coupled to a writing signal line, a first terminal coupled to a data line, and a second terminal coupled to the first node, a storage capacitor coupled between the first node and the second node, a light emitting element coupled between the second node and a second power supply voltage line, and a seventh transistor including a gate coupled to an initialization signal line, a first terminal coupled to a bias voltage line, and a second terminal coupled to the bottom gate.
    Type: Grant
    Filed: July 20, 2023
    Date of Patent: October 1, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Minjae Jeong, Jangmi Kang, Hyeongseok Kim, Junhyun Park, Mukyung Jeon
  • Publication number: 20240324411
    Abstract: A display apparatus is provided. The display apparatus includes a substrate including a display area and a peripheral area, a dam portion arranged in the peripheral area of the substrate and including a plurality of dams, and an encapsulation layer disposed on the substrate and the dam portion. At least one of the plurality of dams includes at least one first layer including an organic layer, and a second layer disposed on the first layer and including at least one of a conductive layer and an inorganic layer.
    Type: Application
    Filed: March 14, 2024
    Publication date: September 26, 2024
    Inventors: Donghoon Lee, Jangmi Kang, Haemin Kim, Myunghoon Park, Youngwan Seo, Byungchang Yu, Geunho Lee
  • Publication number: 20240324283
    Abstract: A display apparatus is disclosed that includes a substrate including a front display area and a corner display area extending from a corner of the front display area. A plurality of main light-emitting elements is arranged in the front display area and a plurality of main pixel circuits are connected to the plurality of main light-emitting elements, respectively. A plurality of corner light-emitting elements is arranged in the corner display area and a plurality of corner pixel circuits are connected to the plurality of corner light-emitting elements. Each of the plurality of main pixel circuits and the plurality of corner pixel circuits includes a boost capacitor, and a capacitance of the boost capacitor included in each of the plurality of corner pixel circuits gradually increases or decreases as the boost capacitor gets farther from the front display area.
    Type: Application
    Filed: March 22, 2024
    Publication date: September 26, 2024
    Inventors: Jangmi Kang, Myunghoon Park, Byungchang Yu, Donghoon Lee
  • Patent number: 12101976
    Abstract: An electronic device includes a display panel including a plurality of pixels. Each of the plurality of pixels includes a light-emitting diode, a power line, an initialization voltage line, an initialization signal line, a bias voltage line, a transistor including a first gate in contact with the initialization signal line through a first contact and electrically connected between the initialization voltage line and the anode, and a transistor including a second gate in contact with the initialization signal line through a second contact and electrically connected between the power line and the bias voltage line. In a plan view, the initialization signal line does not overlap the power line.
    Type: Grant
    Filed: March 3, 2022
    Date of Patent: September 24, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junhyun Park, Jangmi Kang, Minjae Jeong
  • Publication number: 20240274082
    Abstract: A display apparatus includes a display panel, a gate driver, a data driver and an emission driver. The display panel includes a pixel. The gate driver provides a gate signal to the pixel. The data driver provides a data voltage to the pixel. The emission driver provides an emission signal to the pixel. The pixel includes a light emitting element, a driving switching element which applies a driving current to the light emitting element, a storage capacitor connected to a control electrode of the driving switching element and a bias capacitor including a first electrode connected to the storage capacitor and a second electrode which receives a bias gate signal. A waveform of the bias gate signal varies based on an off ratio representing a ratio of an off period of the emission signal in a frame period.
    Type: Application
    Filed: April 23, 2024
    Publication date: August 15, 2024
    Inventors: Junhyun PARK, Jangmi KANG, Hyeongseok KIM, Soil YOON, Minjae JEONG, Mukyung JEON
  • Publication number: 20240251599
    Abstract: Disclosed is a display device which includes pixel drivers, each of which includes a first transistor switched by a voltage of a node and electrically connected between a second electrode and a second power supply line, a second transistor electrically connected between the node and a data line and switched by a write scan signal, and a capacitor including a first capacitor electrode electrically connected to the node and a second capacitor electrode electrically connected between the second power supply line and the first transistor. First electrodes of light emitting elements overlap each of the first capacitor electrodes of the pixel drivers.
    Type: Application
    Filed: September 11, 2023
    Publication date: July 25, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: DONG-HOON LEE, JANGMI KANG, MYUNGHOON PARK, MINKYU WOO, BYUNGCHANG YU
  • Publication number: 20240237422
    Abstract: A display panel includes a first peripheral upper electrode disposed on an insulating layer in a peripheral area, a second peripheral upper electrode disposed on the insulating layer in the peripheral area and disposed closer to the display area than the first peripheral upper electrode, a display separator disposed between the upper electrode of the first light emitting device and the upper electrode of the second light emitting device, and a peripheral separator disposed between the first peripheral upper electrode and the second peripheral upper electrode to realize superior electrical reliability.
    Type: Application
    Filed: October 24, 2023
    Publication date: July 11, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: JANGMI KANG, MYUNGHOON PARK, BYUNGCHANG YU, DONG-HOON LEE
  • Publication number: 20240224670
    Abstract: A display device includes: a substrate having a first portion and a second portion adjacent to the first portion in a first direction; a plurality of first pixels; and a plurality of second pixels: a plurality of light emitters comprising a plurality of light emitting elements and arranged in the first direction; a plurality of circuits comprising a plurality of transistors arranged in the first direction; a plurality of first extension lines connected to the circuit units; and a plurality of second extension lines connected to the first extension lines and the light emitters, wherein in an order of the circuits in a direction away from the first portion, a length of each of the first extension lines connected to k+1-th circuits is different from that of each of the first extension lines connected to k-th circuits, and k is a natural number greater than 1.
    Type: Application
    Filed: December 18, 2023
    Publication date: July 4, 2024
    Inventors: JUNG SUK BANG, JANGMI KANG, TAEHYUN KIM, DONG-HOON LEE