Patents by Inventor Seong-Joo Lee

Seong-Joo Lee 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: 11908422
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: February 20, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
  • Publication number: 20240053208
    Abstract: The present disclosure relates to an apparatus for measuring temperature distribution in a wide area using a diamond nitrogen vacancy center sensor and a method for fabricating the same, and disclosed is a diamond nitrogen-vacancy center sensor capable of measuring a temperature in a wide area including: a plurality of diamond thin films that are provided at different positions on an insulator and are not connected to each other, and it will be possible to measure temperature distribution in a wide area using the same.
    Type: Application
    Filed: December 1, 2020
    Publication date: February 15, 2024
    Inventors: Sangwon OH, Jeong Hyun SHIM, Seong-Joo LEE, Kwang-Geol LEE, Juil HWANG, Seung Hun SONG, Ouk Jae LEE
  • Patent number: 11869438
    Abstract: A display device includes a display panel including pixels connected to scan lines and data lines, and connection line connected to the scan lines, and a scan driver which drives scan lines. The scan driver includes a scan signal output circuit which outputs a first output signal as a scan signal to a first output line and outputs a second output signal to a second output line, a signal distribution circuit which outputs the first output signal to a first or third connection line and outputs the second output signal to a second or fourth connection line in response to first and second distribution control signals, and a scan-off circuit which outputs gate-off level to at least one of the scan lines in response to first and second scan-off control signals.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: January 9, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Gun Ma, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Keum Dong Jung, Sang Hyun Heo
  • Patent number: 11837132
    Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: December 5, 2023
    Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Seong Joo Lee, Seok Tae Koh, Gyeong Gu Kang, Oh Jo Kwon, Hyun Sik Kim, Gyu Wan Lim, Keum Dong Jung
  • Patent number: 11744108
    Abstract: A display apparatus including two lines is provided. The two lines may extend in a first direction. A light-emitting device may be disposed between the two lines. Each line may be bent or extended in the direction of the device substrate which supports the light-emitting device. Thus, in the display apparatus, mixing of light emitted to the outside through the device substrate may be prevented. Therefore, in the display apparatus, the quality of realized image may be improved.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: August 29, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Seong-Joo Lee, Jung-Ho Bang, Jung-Sun Beak, Sun-Mi Lee, Tae-Hwan Kim, Hyeon-Chul Im
  • Patent number: 11735103
    Abstract: An analog front-end includes a (1-1)-th charge amplifier configured to differentially amplify a first and second sensing signals provided to a (1-1)-th input terminal and a (1-2)-th input terminal, respectively, and output a (1-1)-th differential signal. A (1-2)-th charge amplifier is configured to differentially amplify the second sensing signal and a third sensing signal provided to a (1-3)-th input terminal and a (1-4)-th input terminal, respectively, and output a (1-2)-th differential signal. A second charge amplifier is configured to differentially amplify the (1-1)-th differential signal and the (1-2)-th differential signal provided to a (2-1)-th input terminal and a (2-2)-th input terminal, respectively, and output a (2-1)-th differential signal and a (2-2)-th differential signal. A demodulation circuit is configured to filter the (2-1)-th differential signal and the (2-2)-th differential signal and output demodulated differential signals.
    Type: Grant
    Filed: April 15, 2022
    Date of Patent: August 22, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung Tea Park, Ji Woong Kim, Hyung Gun Ma, Seong An Park, Seong Joo Lee, Tae Hun Lee, Sang Hyun Heo
  • Publication number: 20230072385
    Abstract: A sensor device includes first sensors; second sensors and the first sensors of mutual capacitance; a sensor transmitter electrically connected to the first sensors, the sensor transmitter supplying driving signals to the first sensors; a sensor receiver electrically connected to the second sensors, the sensor receiver receiving sensing signals from the second sensors, the sensor receiver demodulating the sensing signals by using demodulation clock signals; and a signal generator generating a basic clock signal, and generating the driving signals and the demodulation clock signals to be synchronized with the basic clock signal.
    Type: Application
    Filed: March 23, 2022
    Publication date: March 9, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Ji Woong KIM, Hyung Gun MA, Kyung Tea PARK, Seong Joo LEE, Keum Dong JUNG, Sang Hyun HEO
  • Publication number: 20230073395
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Application
    Filed: November 14, 2022
    Publication date: March 9, 2023
    Inventors: Hyung Gun MA, Oh Jo KWON, Ji Woong KIM, Jun Yong SONG, Seong Joo LEE, Sang Hyun HEO
  • Publication number: 20230061354
    Abstract: An analog front-end includes a (1-1)-th charge amplifier configured to differentially amplify a first and second sensing signals provided to a (1-1)-th input terminal and a (1-2)-th input terminal, respectively, and output a (1-1)-th differential signal. A (1-2)-th charge amplifier is configured to differentially amplify the second sensing signal and a third sensing signal provided to a (1-3)-th input terminal and a (1-4)-th input terminal, respectively, and output a (1-2)-th differential signal. A second charge amplifier is configured to differentially amplify the (1-1)-th differential signal and the (1-2)-th differential signal provided to a (2-1)-th input terminal and a (2-2)-th input terminal, respectively, and output a (2-1)-th differential signal and a (2-2)-th differential signal. A demodulation circuit is configured to filter the (2-1)-th differential signal and the (2-2)-th differential signal and output demodulated differential signals.
    Type: Application
    Filed: April 15, 2022
    Publication date: March 2, 2023
    Inventors: Kyung Tea PARK, Ji Woong KIM, Hyung Gun MA, Seong An PARK, Seong Joo LEE, Tae Hun LEE, Sang Hyun HEO
  • Publication number: 20230031695
    Abstract: A display device includes a display panel including pixels connected to scan lines and data lines, and connection line connected to the scan lines, and a scan driver which drives scan lines. The scan driver includes a scan signal output circuit which outputs a first output signal as a scan signal to a first output line and outputs a second output signal to a second output line, a signal distribution circuit which outputs the first output signal to a first or third connection line and outputs the second output signal to a second or fourth connection line in response to first and second distribution control signals, and a scan-off circuit which outputs gate-off level to at least one of the scan lines in response to first and second scan-off control signals.
    Type: Application
    Filed: February 15, 2022
    Publication date: February 2, 2023
    Inventors: Hyung Gun MA, Ji Woong KIM, Jun Yong SONG, Seong Joo LEE, Keum Dong JUNG, Sang Hyun HEO
  • Patent number: 11537226
    Abstract: A touch display panel having a display unit including a plurality of pixels, an encapsulation unit disposed on the display unit, a touch sensor unit including a plurality of touch sensors disposed on the encapsulation unit, a color filter layer disposed on the touch sensor unit, the color filter layer including a color filter and a black matrix, a touch routing line and a touch pad connected to each of the touch sensors, a crack prevention layer disposed in a bending area between the touch routing line and the touch pad, a touch link line configured to interconnect the touch routing line and the touch pad via the lower part of the crack prevention layer in the bending area, and a touch passivation layer disposed on each of the touch sensors and the touch link line.
    Type: Grant
    Filed: December 24, 2020
    Date of Patent: December 27, 2022
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jin-Bok Lee, Jung-Ho Bang, Seong-Joo Lee
  • Patent number: 11501718
    Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: November 15, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
  • Publication number: 20220335871
    Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.
    Type: Application
    Filed: October 13, 2021
    Publication date: October 20, 2022
    Inventors: Seong Joo LEE, Seok Tae KOH, Gyeong Gu KANG, Oh Jo KWON, Hyun Sik KIM, Gyu Wan LIM, Keum Dong JUNG
  • Publication number: 20220254840
    Abstract: A display apparatus including two lines is provided. The two lines may extend in a first direction. A light-emitting device may be disposed between the two lines. Each line may be bent or extended in the direction of the device substrate which supports the light-emitting device. Thus, in the display apparatus, mixing of light emitted to the outside through the device substrate may be prevented. Therefore, in the display apparatus, the quality of realized image may be improved.
    Type: Application
    Filed: April 27, 2022
    Publication date: August 11, 2022
    Inventors: Seong-Joo LEE, Jung-Ho BANG, Jung-Sun BEAK, Sun-Mi LEE, Tae-Hwan KIM, Hyeon-Chul IM
  • Patent number: 11348986
    Abstract: A display apparatus including two lines is provided. The two lines may extend in a first direction. A light-emitting device may be disposed between the two lines. Each line may be bent or extended in the direction of the device substrate which supports the light-emitting device. Thus, in the display apparatus, mixing of light emitted to the outside through the device substrate may be prevented. Therefore, in the display apparatus, the quality of realized image may be improved.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: May 31, 2022
    Assignee: LG Display Co., Ltd.
    Inventors: Seong-Joo Lee, Jung-Ho Bang, Jung-Sun Beak, Sun-Mi Lee, Tae-Hwan Kim, Hyeon-Chul Im
  • Patent number: 11322288
    Abstract: A fluid-cooled electromagnet includes an upper housing, a lower housing vertically aligned with the upper housing, a plurality of pancake coils disposed between the upper housing and the lower housing to be spaced apart from each other and sequentially stacked to have a washer shape, and at least one spacer, disposed between the upper housing and the lower housing, accommodating the pancake coils at regular intervals.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: May 3, 2022
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Seong Min Hwang, Jeong Hyun Shim, Ingo Hilschenz, Seong-Joo Lee, Kiwoong Kim
  • Patent number: 11322096
    Abstract: A data driver includes: a signal generator which includes a staircase waveform gray voltage signal generator which generate a plurality of staircase waveform gray voltage signals using a lowest gamma reference voltage, a highest gamma reference voltage, and a plurality of gamma voltages having a magnitude between the lowest gamma reference voltage and the highest gamma reference voltage; and a channel driver which includes a decoder which output one staircase waveform gray voltage signal selected from the staircase waveform gray voltage signals, an output circuit which output a gray voltage corresponding to the selected staircase waveform gray voltage signal, and a reset unit which supplies one of the gamma voltages to the output circuit as a reset voltage.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: May 3, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seong Joo Lee, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Jun Yong Song, Sang Hyun Heo
  • Patent number: 11271582
    Abstract: A digital-to-analog converter (“DAC”) converts digital image data into analog image signals. The DAC includes a stage outputting different voltages to a first output terminal and a second output terminal based on a voltage supplied to a first input terminal, a voltage supplied to a second input terminal, and a first input bit. The stage includes a switch circuit including switches that are alternately turned on by a control signal, and outputting an intermediate output voltage to a third output terminal based on a first input voltage supplied to the first input terminal and a second input voltage supplied to the second input terminal, and a selector outputting one of the first input voltage and the second input voltage, and the intermediate output voltage.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: March 8, 2022
    Assignees: SAMSUNG DISPLAY CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Seong Joo Lee, Oh Jo Kwon, Gyeong Gu Kang, Seok Tae Koh, Joon Chul Goh, Hyun Sik Kim, Bong Hyun You
  • Publication number: 20220044640
    Abstract: A data driver includes: a signal generator which includes a staircase waveform gray voltage signal generator which generate a plurality of staircase waveform gray voltage signals using a lowest gamma reference voltage, a highest gamma reference voltage, and a plurality of gamma voltages having a magnitude between the lowest gamma reference voltage and the highest gamma reference voltage; and a channel driver which includes a decoder which output one staircase waveform gray voltage signal selected from the staircase waveform gray voltage signals, an output circuit which output a gray voltage corresponding to the selected staircase waveform gray voltage signal, and a reset unit which supplies one of the gamma voltages to the output circuit as a reset voltage.
    Type: Application
    Filed: March 10, 2021
    Publication date: February 10, 2022
    Inventors: Seong Joo LEE, Oh Jo KWON, Ji Woong KIM, Hyung Gun MA, Jun Yong SONG, Sang Hyun HEO
  • Patent number: 11227903
    Abstract: Disclosed are an organic light emitting display device to improve optical efficiency and prevent deterioration in reliability of thin film transistors, and a method of manufacturing the same. The organic light emitting display device includes a mirror wall which is disposed on a substrate such that the mirror wall surrounds a light emitting area of each sub-pixel where a light emitting element is disposed, thus preventing total reflection of light produced in the light emitting element and improving optical efficiency by reflecting light travelling toward a non-emitting area to be directed to the light emitting area.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: January 18, 2022
    Assignee: LG Display Co., Ltd.
    Inventors: Seong-Joo Lee, Jeong-Oh Kim, Jung-Sun Beak