Patents by Inventor Seung Kyu Lee

Seung Kyu 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).

  • TILED DISPLAY DEVICE
    Publication number: 20220102322
    Abstract: A tiled display device includes a first display device and a second display device, each of the first display and the second display including a display area and a non-display area. The first display device and the second display device are bonded to each other. The first display device includes an alignment key area and a lower electrode layer. The alignment key area performs an alignment key function when a process is performed on the tiled display device. The lower electrode layer includes a first lower electrode layer and a second lower electrode layer. The first lower electrode layer surrounds the display area of the first display device and the second lower electrode layer is disposed in the alignment key area.
    Type: Application
    Filed: April 5, 2021
    Publication date: March 31, 2022
    Applicant: Samsung Display Co., LTD.
    Inventors: Sang Seop KUM, Beom Jun KIM, Seung Kyu LEE
  • Display device having a switch unit for power switching operation and method of driving the same
    Patent number: 11282426
    Abstract: A display device, including: pixels coupled to scan lines and data lines; a data driver configured to supply respective data signals to the data lines, including an amplifier disposed at an output terminal of the data driver, the amplifier including a first power terminal and a second power terminal; a switch unit configured to perform a power switching operation of alternately connecting the first power terminal and the second power terminal of the amplifier to a first driving power source and a second driving power source; and a driving controller configured to control the data driver and the switch unit, wherein the driving controller is configured to output a switch control signal to control the switch unit and interrupt the power switching operation during a blank period between source output periods, during which the data driver is configured to output the data signals of each frame.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: March 22, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae Cheon Park, Seung Kyu Lee, Yoon Gyu Lee, Chae Han Hyun
  • Display device and driving method thereof
    Patent number: 11282432
    Abstract: A display device includes a processor and a display panel for receiving observation grayscale values from the processor. The display panel includes a data driver for applying data voltages to data lines, a target pixel coupled to at least one of the data lines, and observation pixels each coupled to at least one of the data lines, and located adjacent to the target pixel. The display panel applies a first data voltage to the target pixel, when the observation grayscale values for the observation pixels exceed a reference value. The display panel applies a second data voltage to the target pixel, when at least one of the observation grayscale values does not exceed the reference value. The first data voltage and the second data voltage are different from each other.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: March 22, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Si Beak Pyo, Seung Kyu Lee, Hyun Jung Son, Yoon Gyu Lee
  • Non-rectangular display and driving method thereof
    Patent number: 11270643
    Abstract: A non-rectangular display includes: a plurality of first signal lines extending along a first direction; a plurality of DC voltage lines extending along the first direction; and a plurality of second signal lines extending along the first direction, wherein a first DC voltage line of the plurality of DC voltage lines is between a first line of the plurality of first signal lines and a second line of the plurality of second signal lines, a second DC voltage line of the plurality of DC voltage lines is between a third line of the plurality of first signal lines and a fourth line of the plurality of second signal lines, and the first and third lines are adjacent to each other, or the second and fourth lines are adjacent to each other.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Kyu Lee, Tae Hoon Kim, Jae Du Noh
  • Display device and driving method thereof
    Patent number: 11270637
    Abstract: A display device includes: an organic light emitting diode (OLED); a pixel circuit configured to control an amount of a current flowing from a first power voltage to the OLED; and a gate line and a data line that are connected to the pixel circuit, the pixel circuit including: an auxiliary transistor including a gate electrode electrically connected to the data line and a first electrode and a second electrodes connected to the gate line, the first electrode and the second electrode of the auxiliary transistor being electrically connected to each other.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: March 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong Won Park, Seung-Kyu Lee, Hyun Woong Kim
  • Display device and driving method thereof
    Patent number: 11270650
    Abstract: A display device including pixels connected to a p-type scan line, an n-type scan line, and a data line, to display an image in a first mode with a first frequency or a second mode with a second, lower frequency, a first scan driver to supply a p-type signal having a first voltage to the p-type scan line, and a second scan driver to supply an n-type signal having a second, greater voltage to the n-type scan line, the second mode includes a first period corresponding to one frame period and a second period including consecutive frame periods, in which during the first period, the scan drivers supply i number of corresponding signals to the p-type and n-type scan lines, respectively, and during at least one frame of the second period, the first scan driver supplies j number of p-type signals to the p-type scan line.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: March 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung Deok Seo, Seung Kyu Lee, Min Seong Son
  • Flat panel display including plurality of pads
    Patent number: 11264442
    Abstract: A flat panel display includes a substrate including a display region and a non-display region disposed outside of the display region, a display unit disposed in the display region that displays an image, a plurality of first pads disposed in the non-display region that receive driving signals for driving the display unit, a plurality of second pads disposed in the non-display region that receive inspection signals for inspecting the display unit, a plurality of third pads disposed in the non-display region that receive alignment confirmation signals for confirming alignment, and a resistor coupled between at least two third pads of the plurality of third pads.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: March 1, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Young Taeg Jung, Seung Kyu Lee, Hyun Woong Kim, Hyun Chol Bang
  • Display device
    Patent number: 11257415
    Abstract: A display device includes a gray scale converter to receive input gray scale values, calculate an output load value that is smaller than an input load value when the input load value calculated from the input gray scale values is larger than a start current limit value, and convert the input gray scale values into converted gray scale values to correspond to the output load value, and a data driver to provide data voltages based on the converted gray scale values, wherein, when the input load value is between the start current limit value and a first current limit value, there is a first increase rate of the output load value for the input load value, and wherein, when the input load value is between the first current limit value and a maximum value of the input load value, there is a second increase rate of the output load value.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: February 22, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Si Beak Pyo, Seung Kyu Lee
  • PIXEL AND DISPLAY DEVICE HAVING THE SAME
    Publication number: 20220028329
    Abstract: A display device includes: a pixel including a first transistor connected between a first node and a second node to generate a driving current; an emission driver supplying an emission control signal; a scan driver supplying first to fourth scan signals in a period in which the emission control signal is supplied; a data drive supplying a data signal; a power supply supplying a voltage of a first power source; and a timing controller controlling driving of the scan driver, the emission driver, the data driver, and the power supply The first scan signal controls a timing at which the voltage of the first power source is supplied to the first node or the second node. The power supply changes a level of the voltage of the first power source in one frame period.
    Type: Application
    Filed: July 20, 2021
    Publication date: January 27, 2022
    Inventors: Yun Seong KIM, Seung Kyu LEE, Sun Joon HWANG, Min Seong SON, Youn Woo CHOE
  • Liquid crystal display and manufacturing method thereof
    Patent number: 11221523
    Abstract: A liquid crystal display includes: a gate line connected to a gate electrode; a semiconductor layer disposed on the gate line and including silicon; an ohmic contact layer disposed on the semiconductor layer; and a data conductor disposed on the ohmic contact layer. The semiconductor layer includes a source region, a drain region, and a channel region disposed between the source region and the drain region. The data conductor includes a data line transmitting a data signal, a source electrode corresponding to the source region, and a drain electrode corresponding to the drain region. A channel step of the semiconductor layer is a height difference between an upper surface in the source region or the drain region and an upper surface in the channel region. The upper surface in the source region or the drain region has a maximum height of the semiconductor layer.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: January 11, 2022
    Inventors: Ki Pyo Hong, Wan Namgung, Seung-Kyu Lee, Hyun Seong Kang, Byeong Jae Ahn
  • Pixel and organic light emitting display device having the pixel
    Patent number: 11217165
    Abstract: The present disclosure relates to a pixel displaying an image. A pixel includes an organic light emitting diode, a first transistor controlling an amount of current flowing from a first driving power supply to a second driving power supply via the organic light emitting diode in response to a voltage of a first node; a storage capacitor connected between the first node and the first driving power supply; a second transistor connected between a data line and the first node and turned on when a scan signal is supplied to a first scan line, and an auxiliary transistor connected between the second transistor and the data line and turned on when a scan signal is supplied to a second scan line. The second transistor and the auxiliary transistor have an overlapping turn-on period, and the second transistor is turned off before the auxiliary transistor is turned off.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: January 4, 2022
    Inventors: Tae Hoon Kim, Ji Hyun Ka, Seung Kyu Lee
  • STAGE AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME
    Publication number: 20210383751
    Abstract: A stage includes an output, an input, signal processors, and a stabilizer. The output supplies a voltage of a first or second power source to an output terminal based on voltages of first and second nodes. The input controls voltages of third and fourth nodes based on signals to a first and second input terminals. A first signal processor controls the voltage of the first node based on the voltage of the second node. A second signal processor is connected to a fifth node and controls the voltage of the first node based on a signal to a third input terminal. A third signal processor controls the voltage of the fourth node based on the voltage of the third node and the signal to the third input terminal. The stabilizer is connected between the second signal processor and input to control voltage drop widths of the third and fourth nodes.
    Type: Application
    Filed: August 20, 2021
    Publication date: December 9, 2021
    Inventors: Seung Kyu Lee, Seung Ji Cha, Ji Hyun Ka, Tae Hoon Kwon, Min Ku Lee, Jin Tae Jeong
  • DISPLAY DEVICE
    Publication number: 20210375193
    Abstract: A display device includes a pixel including a first transistor coupled between a first node and a second node, an emission driver supplying an emission control signal at a first frequency to an emission control line, a scan driver supplying first to fourth scan signals respectively to first to fourth scan lines, a data driver supplying a data signal to a data line, and a timing controller. The first scan signal controls a timing at which a voltage of a first power source is supplied to the first node or the second node, and the second scan signal controls a timing at which a first electrode of the first transistor and a gate electrode of the first transistor are coupled to each other. The scan driver controls a bias state of the first transistor by supplying, plural times, the first and second scan signals in a non-emission period.
    Type: Application
    Filed: April 28, 2021
    Publication date: December 2, 2021
    Inventors: Min Seong SON, Seung Kyu LEE, Sun Joon HWANG, Yun Seong KIM, Youn Woo CHOE
  • Display device including crack detection line
    Patent number: 11189204
    Abstract: A display device includes a peripheral area around a display area, a plurality of pixels in the display area, and a plurality of signal lines connected to the pixels. The signal lines include a plurality of data lines connected to the pixels, a crack detection line connected to first data lines among the data lines through a first transistor, and a control line connected to a gate of the first transistor. The crack detection line is in the peripheral area.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: November 30, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Kyu Lee, Tae Hoon Kwon, Ji-Hyun Ka, Won Kyu Kwak, Dong Soo Kim, Han-Sung Bae, Hey Jin Shin, Seung Ji Cha
  • Display device and method of controlling brightness of the same based on sample brightness levels
    Patent number: 11189233
    Abstract: A display device includes a display driver configured to drive pixels in correspondence with input image data, timing signals, and a brightness selection signal. The display driver includes a storage unit configured to store gamma data and a duty value for each of a plurality of sample brightness levels including a K-th sample brightness level, and a brightness controller, the display driver being configured to control the brightness of the display area according to the gamma data or the duty value or gamma data obtained by non-linearly interpolating gamma data of a (K?1)-th sample brightness level and the K-th sample brightness level, with respect to a tuning point brightness level. A light emission time of the pixels corresponding to the (K?1)-th sample brightness level is less than or equal to 10% shorter than the light emission time of the pixels corresponding to the K-th sample brightness level.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: November 30, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Seong Son, Hyun Jung Son, Jae Cheon Park, Seung Kyu Lee, Yoon Gyu Lee, Sun Joon Hwang
  • NON-QUADRANGULAR DISPLAY
    Publication number: 20210366399
    Abstract: A display includes a plurality of pixels in a non-quadrangular display area and a plurality of first driving circuits and a plurality of second driving circuits in a peripheral area of the display area. Each of the pixels is connected to a first signal line in a first direction and a second signal line in a second direction crossing the first direction. Each of the first driving circuits outputs a first signal to the first signal line of a corresponding one of the pixels. Each of the second driving circuits outputs a second signal to the second signal line of a corresponding one of the pixels. The number of second driving circuits between neighboring first driving circuits is different depending on a position in the peripheral area.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Inventors: Seung-Kyu Lee, Kwang-Min Kim, Byoung Sun Kim
  • DISPLAY DEVICE
    Publication number: 20210358972
    Abstract: A display device including: a substrate including a display area for displaying an image and a non-display area positioned at a periphery of the display area; a plurality of pixels positioned at the display area; a plurality of data lines connected with the plurality of pixels; and a crack detecting line positioned at the non-display area, wherein the crack detecting line includes: a plurality of unit connectors extending in a first direction, wherein the first direction is parallel to an extending direction of a side of the substrate nearest to the unit connectors; and a plurality of wiring portion units connected to each other through the plurality of unit connectors, wherein the number of wiring portion units is an even number.
    Type: Application
    Filed: July 26, 2021
    Publication date: November 18, 2021
    Inventors: HEY JIN SHIN, WON KYU KWAK, SEUNG-KYU LEE
  • Display apparatus and method of driving the same
    Patent number: 11176887
    Abstract: The present disclosure relates to a display apparatus enhancing a display quality and a method of driving the display apparatus. The display apparatus comprises a display panel and a power voltage generator. The display panel comprises a plurality of pixels. The power voltage generator is configured to output a first initialization voltage, a second initialization voltage, a first power voltage, and a second power voltage less than the first power voltage to the plurality of pixels. The power voltage generator is configured to output the second initialization voltage substantially equal to the second power voltage in response to an emergency shutdown signal.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: November 16, 2021
    Inventors: Jung Deok Seo, Seung-Kyu Lee, Min Seong Son
  • Source driver and display device including the same
    Patent number: 11170689
    Abstract: A source driver includes a gamma voltage generation circuit. The gamma voltage generation circuit generates a gamma voltage and varies a gamma voltage based on a drive frequency. A data voltage generation circuit generates a data voltage based on the gamma voltage.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: November 9, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Si Beak Pyo, Seung Kyu Lee
  • DISPLAY DEVICE
    Publication number: 20210343606
    Abstract: A display device includes a display area, a peripheral area, a pad portion, a bending area, a first crack detection circuit, and a first crack detection line. The display area includes pixels and data lines. The peripheral area is disposed outside the display area. The pad portion is disposed in the peripheral area. The bending area is disposed in the peripheral area. The bending area is bendable or in a bent state. The first crack detection circuit is disposed between the display area and the pad portion. The first crack detection circuit includes switches. The first crack detection line includes a first curved portion disposed in the bending area. The first crack detection line is connected between the pad portion and the first crack detection circuit.
    Type: Application
    Filed: July 12, 2021
    Publication date: November 4, 2021
    Inventors: Hyun Woong KIM, Won Kyu KWAK, Seung-Kyu LEE