Patents by Inventor Joon-Chul Goh

Joon-Chul Goh 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: 12277911
    Abstract: A scan driving circuit includes: a driving circuit configured to output a scan signal to an output terminal in response to clock signals and a carry signal; and a masking circuit configured to stop the driving circuit from outputting the scan signal in response to a masking signal and a signal indicating an operating state of the driving circuit.
    Type: Grant
    Filed: February 23, 2024
    Date of Patent: April 15, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Taehoon Kim, Joon-Chul Goh, Soon-Dong Kim, Hae-Kwan Seo
  • Patent number: 12260800
    Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.
    Type: Grant
    Filed: March 20, 2024
    Date of Patent: March 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Hyun Heo, Joon Chul Goh, Oh Jo Kwon, Dong Soo Kim, Hyung Gun Ma, Jung Hun Yi
  • Publication number: 20250072219
    Abstract: Provided is a display device comprising a display panel including a plurality of pixels, one of the pixels includes a light emitting device, which is connected with a reference node to emit light, and a driving transistor connected between a power line, which is to receive a power supply voltage, and the reference node, a scan transistor, which is connected between a data line to receive a data signal and the driving transistor and receives a scan signal, a light receiving device, which is connected between a bias line to receive a bias voltage and the reference node, and receives the light, and a masking transistor which is connected between the reference node and the light receiving device and receives a masking signal.
    Type: Application
    Filed: November 12, 2024
    Publication date: February 27, 2025
    Inventors: SEOKHA HONG, JOON-CHUL GOH
  • Patent number: 12230183
    Abstract: A display device includes a display panel including pixels arranged along a plurality of pixel lines, each pixel line extending in a first direction, a data driver which applies data voltages to the pixels, and a timing controller which controls the data driver. The data driver includes first channels which applies the data voltages to the pixels of first pixel lines and is adjacent to the display panel in the first direction, and second channels which applies the data voltages to the pixels of second pixel lines and is adjacent to the display panel in a direction opposite to the first direction.
    Type: Grant
    Filed: September 20, 2023
    Date of Patent: February 18, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seongjoo Lee, Joon-Chul Goh
  • Patent number: 12217683
    Abstract: Provided herein is a sub-pixel including first to seventh transistors, first and second capacitors, and a light emitting element, and a display device including the sub-pixel. A body terminal of the first transistor is connected to a first power line. In the sub-pixel and the display device including the sub-pixel in accordance with embodiments of the present disclosure, mitigation of the body effect may lead to an improvement in display quality.
    Type: Grant
    Filed: January 31, 2024
    Date of Patent: February 4, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Joon Chul Goh, Sang Hyun Heo
  • Patent number: 12198617
    Abstract: A display device includes: a display panel including pixels having light-emitting elements; a timing control unit for variably changing the driving frame frequency of the display panel according to the input frame frequency of digital video data; and a data driving unit for outputting data voltages according to the digital video data, wherein the display panel operates at a first frame frequency for a first frame period and operates at a second frame frequency, which is lower than the first frame frequency, for a second frame period, the second frame period includes a data addressing period in which a data voltage corresponding to each of the pixels is applied to the pixels, and a blank period in which no data voltage is applied to each of the pixels, and the blank period includes a period of initializing a first electrode of a light-emitting element into an initialization voltage.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: January 14, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Hye Kim, Joon Chul Goh, Yu Chol Kim, Jin Wook Yang, Ja Kyoung Jin
  • Publication number: 20250006097
    Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.
    Type: Application
    Filed: March 20, 2024
    Publication date: January 2, 2025
    Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
  • Patent number: 12165556
    Abstract: A display device includes a display part, a degradation compensator that generates a first compensated grayscale value by compensating for a first grayscale value corresponding to a first pixel, and generates a second compensated grayscale value by compensating for a second grayscale value corresponding to a second pixel, and a data driver that generates a first data signal based on the first compensated grayscale value to supply the first data signal to the first pixel, and generates a second data signal based on the second compensated grayscale value to supply the second data signal to the second pixel. A second degradation curve is defined by a first degradation coefficient corresponding to a first degradation curve, and a second degradation coefficient corresponding to a first estimated degradation curve for the light conversion particles of a second color calculated by applying the first degradation curve.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: December 10, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seok Ha Hong, Joon Chul Goh, Dong Joon Kwag, Hyung Jin Kim, Ji Eun Park, Jae Sung Bae, Young Soo Hwang
  • Patent number: 12167640
    Abstract: Provided is a display device comprising a display panel including a plurality of pixels, one of the pixels includes a light emitting device, which is connected with a reference node to emit light, and a driving transistor connected between a power line, which is to receive a power supply voltage, and the reference node. a scan transistor, which is connected between a data line to receive a data signal and the driving transistor and receives a scan signal, a light receiving device, which is connected between a bias line to receive a bias voltage and the reference node, and receives the light, and a masking transistor which is connected between the reference node and the light receiving device and receives a masking signal.
    Type: Grant
    Filed: April 13, 2022
    Date of Patent: December 10, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seokha Hong, Joon-Chul Goh
  • Publication number: 20240395184
    Abstract: Provided is a display panel which may include a pixel array including a plurality of pixels connected to scan lines and data lines, a photonic synapse block including a plurality of photonic synapse elements, and a neuron block including a plurality of neuron elements electrically connected to the plurality of photonic synapse elements.
    Type: Application
    Filed: August 5, 2024
    Publication date: November 28, 2024
    Inventors: JUNGYU LEE, JOON-CHUL GOH, KANGHEE LEE
  • Publication number: 20240395192
    Abstract: According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.
    Type: Application
    Filed: February 29, 2024
    Publication date: November 28, 2024
    Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
  • Patent number: 12142174
    Abstract: A display device includes: a display panel including a normal pixel in a display region and a test pixel in a peripheral region, a sensing line coupled to the test pixel, and a sensing circuit configured to sense a mobility characteristic of the test pixel by measuring a current at a source node of the test pixel through the sensing line. The source node of the test pixel is electrically separated from the sensing line in a data writing period of a frame period, and is electrically coupled to the sensing line in an emission period of the frame period.
    Type: Grant
    Filed: August 4, 2023
    Date of Patent: November 12, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seongjoo Lee, Joon-Chul Goh, Ohjo Kwon
  • Publication number: 20240347003
    Abstract: Provided herein is a sub-pixel including first to seventh transistors, first and second capacitors, and a light emitting element, and a display device including the sub-pixel. A body terminal of the first transistor is connected to a first power line. In the sub-pixel and the display device including the sub-pixel in accordance with embodiments of the present disclosure, mitigation of the body effect may lead to an improvement in display quality.
    Type: Application
    Filed: January 31, 2024
    Publication date: October 17, 2024
    Applicant: Samsung Display Co., LTD.
    Inventors: Joon Chul GOH, Sang Hyun HEO
  • Patent number: 12094381
    Abstract: Provided is a display panel which may include a pixel array including a plurality of pixels connected to scan lines and data lines, a photonic synapse block including a plurality of photonic synapse elements, and a neuron block including a plurality of neuron elements electrically connected to the plurality of photonic synapse elements.
    Type: Grant
    Filed: May 31, 2022
    Date of Patent: September 17, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jungyu Lee, Joon-Chul Goh, Kanghee Lee
  • Patent number: 12073776
    Abstract: An afterimage compensator includes: a pixel data generator configured to generate characteristic data for one or more pixels from among a plurality of pixels by using a captured image; a stress accumulator configured to generate an accumulated stress for the one or more pixels in which stress corresponding to the one or more pixels is accumulated based on an image signal of a voltage domain; a domain converter configured to convert the accumulated stress for the one or more pixels from the voltage domain to accumulated stress data for the one or more pixels of a grayscale domain; and a compensator configured to generate compensation data using the characteristic data for the one or more pixels and the accumulated stress data for the one or more pixels.
    Type: Grant
    Filed: September 28, 2022
    Date of Patent: August 27, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seok Ha Hong, Joon Chul Goh, Dong Joon Kwag, Jae Sung Bae
  • Publication number: 20240265850
    Abstract: A display device includes: a display panel including a sub-pixel, the sub-pixel including: a first capacitor; a first transistor to generate a driving current, and including a control electrode connected to the first capacitor; a second transistor connected to the first capacitor, and to provide a data voltage or a reference voltage to the first capacitor in response to a write gate signal; and a light emitting element to receive the driving current to emit light; a data driver to selectively output the data voltage or the reference voltage to the first capacitor through a source channel; and a timing controller to control the data driver.
    Type: Application
    Filed: January 31, 2024
    Publication date: August 8, 2024
    Inventors: SANGHYUN HEO, JOON-CHUL GOH, SEONGJOO LEE, OHJO KWON
  • Patent number: 12057041
    Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The driving controller is configured to predict a panel temperature according to a position in the display panel based on input image data, to calculate a block current of a display block of the display panel and a panel resistance according to the position in the display panel based on the panel temperature, to calculate a voltage drop according to the position in the display panel based on the block current and the panel resistance and to compensate the input image data based on the voltage drop to generate a data signal. The data driver is configured to convert the data signal to a data voltage and to output the data voltage to the display panel.
    Type: Grant
    Filed: February 6, 2023
    Date of Patent: August 6, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seokha Hong, Joon-Chul Goh
  • Publication number: 20240233642
    Abstract: The display device includes a display panel and a pixel. A compensator configured to calculate a degradation rate of the pixel based on an input gray level of first image data, and compensates the first image data based on the degradation rate to generate second image data. A data driver configured to generate a data signal based on the second image data and configured to supply the data signal to the pixel. The pixel includes a first element group and a second element group connected in series to each other, the first element group includes at least one first light emitting element, and the second element group includes at least one second light emitting element. The compensator is to calculate the degradation rate by applying first information on the number of the first light emitting elements and second information on the number of the second light emitting elements.
    Type: Application
    Filed: October 23, 2023
    Publication date: July 11, 2024
    Inventors: Seok Ha HONG, Joon Chul GOH, Dong Joon KWAG, Hyung Jin KIM, Jae Sung BAE
  • Publication number: 20240194153
    Abstract: A scan driving circuit includes: a driving circuit configured to output a scan signal to an output terminal in response to clock signals and a carry signal; and a masking circuit configured to stop the driving circuit from outputting the scan signal in response to a masking signal and a signal indicating an operating state of the driving circuit.
    Type: Application
    Filed: February 23, 2024
    Publication date: June 13, 2024
    Inventors: TAEHOON KIM, JOON-CHUL GOH, SOON-DONG KIM, HAE-KWAN SEO
  • Publication number: 20240169881
    Abstract: A display device includes a display panel including pixels arranged along a plurality of pixel lines, each pixel line extending in a first direction, a data driver which applies data voltages to the pixels, and a timing controller which controls the data driver. The data driver includes first channels which applies the data voltages to the pixels of first pixel lines and is adjacent to the display panel in the first direction, and second channels which applies the data voltages to the pixels of second pixel lines and is adjacent to the display panel in a direction opposite to the first direction.
    Type: Application
    Filed: September 20, 2023
    Publication date: May 23, 2024
    Inventors: SEONGJOO LEE, JOON-CHUL GOH