Patents by Inventor Ki-Hyun Pyun

Ki-Hyun Pyun 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: 11302236
    Abstract: A display device includes: a pixel unit including pixels connected to data lines and scan lines, and signal output lines, where at least one signal output line of the signal output lines is connected to each of the scan lines through a contact point; a data driver disposed at one side of the pixel unit to drive the data lines; a scan driver disposed at the one side of the pixel unit together with the data driver to drive the scan lines; and a timing controller controlling the data driver and the scan driver. The data driver includes: output buffers outputting data signals to the data lines, respectively; and a slew rate controller adjusting a slew rate of the data signals by controlling a bias value supplied to the output buffers in units of pixel rows based on positions of the pixels and a change in the data signals.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: April 12, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ki Hyun Pyun, Min Young Park, Eun Jin Choi
  • Publication number: 20220108650
    Abstract: A display device may include a pixel set, a timing controller, a data driver, and a scale factor provider. The pixel set that may include pixels. The pixels may be divided into pixel groups. The timing controller may calculate first load values corresponding to an image frame of input image data and may generate image data by scaling gradation values of the input image data using scale factors. The data driver may generate data signals corresponding to the image data and may supply the data signals to the pixel set. The scale factor provider may calculate the first load values and one or more second load values based on temperature data corresponding to a temperature of the pixel set and may generate the scale factors based on the one or more second load values and a common current value of a current received by the pixels.
    Type: Application
    Filed: June 7, 2021
    Publication date: April 7, 2022
    Inventors: Geon Hwi PARK, Young Woon CHOI, Ki Hyun PYUN
  • Patent number: 11283449
    Abstract: An interface system including: a receiver; a transmitter configured to transmit a signal including a common mode voltage to the receiver through transmission lines; and a plurality of bias circuits configured to adjust the common mode voltage of the signal, wherein the bias circuits are configured to receive a bias control bit to generate a biased common mode voltage.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: March 22, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ki Hyun Pyun, Won Jin Seo, Eun Jin Choi
  • Patent number: 11282433
    Abstract: A display device includes first pixels partitioned into a plurality of blocks, each of the plurality of blocks being categorized as a first block or a second block, a sensor configured to generate first sensing data for at least two of the first pixels in each of the plurality of blocks during a first period, and a sensing controller configured to generate interpolated data for the first pixels that are not sensed by the sensor by interpolating the first sensing data, for the first block, and configured to forgo interpolation of the first sensing data, for the second block. The sensor generates second sensing data for the first pixels that are not sensed by the sensor, for the second block, during a second period after the first period.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: March 22, 2022
    Inventors: Su Min Yang, Wook Lee, Hye Ji Kim, Ki Hyun Pyun
  • Publication number: 20220084469
    Abstract: A display device includes a display panel including scan lines, first signal lines connected to the scan lines in a first pixel block, second signal lines connected to the scan lines in a second pixel block, third signal lines connected to the scan lines in a third pixel block; a first scan driver supplying a first output signal to the first signal lines based on a first sub-clock signal; a second scan driver supplying a second output signal to the second signal lines based on a second sub-clock signal; a third scan driver supplying a third output signal to the third signal lines based on and a third sub-clock signal; and a timing controller. Changes in pulse widths of the first to third output signals are different in one frame period.
    Type: Application
    Filed: May 12, 2021
    Publication date: March 17, 2022
    Inventors: Ki Hyun PYUN, Jang Hoon KWAK, Won Jin SEO
  • Publication number: 20220084453
    Abstract: A display device includes: a pixel unit including pixels connected to data lines and scan lines, and signal output lines, where at least one signal output line of the signal output lines is connected to each of the scan lines through a contact point; a data driver disposed at one side of the pixel unit to drive the data lines; a scan driver disposed at the one side of the pixel unit together with the data driver to drive the scan lines; and a timing controller controlling the data driver and the scan driver. The data driver includes: output buffers outputting data signals to the data lines, respectively; and a slew rate controller adjusting a slew rate of the data signals by controlling a bias value supplied to the output buffers in units of pixel rows based on positions of the pixels and a change in the data signals.
    Type: Application
    Filed: April 20, 2021
    Publication date: March 17, 2022
    Inventors: Ki Hyun PYUN, Min Young PARK, Eun Jin CHOI
  • Publication number: 20220084471
    Abstract: Provided are a display device and a driving method thereof. The display device includes: a display panel for displaying an image, based on data signals supplied from data lines; a load controller for determining a scale factor for controlling a target luminance of the image displayed in the display panel, based on a load of first image data input from the outside; and a data driver for outputting data signals to the data lines, corresponding to the first image data corrected using the scale factor. The data driver includes a plurality of data driver chips coupled to at least one data line among the data lines. The load controller determines the scale factor, based on at least one of a total load of the first image data and local loads with respect to the respective data driver chips.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 17, 2022
    Inventors: Ki Hyun PYUN, Sung In KANG, Kyun Ho KIM
  • Publication number: 20220076636
    Abstract: A display device of the present invention includes a pixel unit including a plurality of pixels connected to data lines and scan lines; a data driver disposed on one side of the pixel unit to drive the data lines; a scan driver disposed on the one side of the pixel unit together with the data driver to drive the scan lines; and a controller which controls an output timing of a data signal in units of pixel columns and units of pixel rows based on a load of a scan signal supplied to the scan lines and a load of the data signal supplied to the data lines.
    Type: Application
    Filed: June 10, 2021
    Publication date: March 10, 2022
    Inventors: Young Soo SOHN, Ki Hyun PYUN, Jae Hyoung PARK, Kwan Young OH, Seung Young CHOI
  • Publication number: 20220076630
    Abstract: A display device may include a display unit, a signal controller, and a sensing unit. The display unit may include pixels. The signal controller may select a first pixel set from the pixel according to ages of the pixels determined based on an image signal. The sensing unit may be electrically connected to each of the display unit and the signal controller and may sense deterioration information of one or more pixels included in the first pixel set for a vertical blank period in which the display unit displays no image.
    Type: Application
    Filed: August 16, 2021
    Publication date: March 10, 2022
    Inventors: Ki Hyun PYUN, Hee Sook PARK
  • Patent number: 11257412
    Abstract: A display device includes a display panel having a plurality of pixels, a controller configured to determine a peak luminance based on a target luminance and a black duty ratio that is a ratio of a black insertion period to a sum of an image display period and the black insertion period, to determine gray-luminance information representing a plurality of luminances respectively corresponding to a plurality of gray levels based on the peak luminance and a target gamma value, and to generate gray-voltage information representing a plurality of voltage levels respectively corresponding to the plurality of gray levels based on a target white color coordinate and the gray-luminance information, a gray voltage generator configured to generate a plurality of gray voltages having the plurality of voltage levels based on the gray-voltage information, and a data driver configured to provide the plurality of gray voltages corresponding to output image data as data voltages to the plurality of pixels in the image display
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: February 22, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ki Hyun Pyun, Hee Sook Park
  • Publication number: 20220051624
    Abstract: The present disclosure provides a display device. The display device includes a gain provider for gradually decreasing a gain value from a first time when a first period elapses from a time at which an enable signal is generated, and a plurality of pixels for receiving data voltages determined by the gain value and the input grayscale values. The gain provider determines a length of the first period according to a first load value based on the input grayscale values at the time at which the enable signal is generated.
    Type: Application
    Filed: October 27, 2021
    Publication date: February 17, 2022
    Inventors: Ki Hyun PYUN, Hee Sook PARK
  • Patent number: 11244600
    Abstract: A display device and a driving method thereof are disclosed, and the display device includes a first pixel connected to a first data line, a first scan line, and a first power source line, emitting light in a first period, and not emitting light in a second period following the first period; a second pixel connected to a second data line, the first scan line, and the first power source line, not emitting light in the first period, and emitting light in the second period; a current sensor sensing a current flowing through the first power source line in the first period to provide a first sensing current value, and sensing the current flowing through the first power source line in the second period to provide a second sensing current value; and a memory storing a first block target current value corresponding to the first sensing current value and a second block target current value corresponding to the second sensing current value.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: February 8, 2022
    Inventors: Ki Hyun Pyun, Myoung Seop Song, Myung Ho Lee
  • Patent number: 11244596
    Abstract: A display device includes: a gain provider configured to set a time point elapsed by a set period from a time point at which a first region of an input image is detected as a still region, as a set time, and to gradually decrease a gain value from the set time; and a grayscale converter configured to generate an output image by applying the gain value to the first region and a second region including a peripheral region of the first region among the input image, wherein the gain provider is configured to set the set period differently according to size of grayscale values in the first region.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: February 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee Sook Park, Ki Hyun Pyun
  • Patent number: 11222576
    Abstract: A display device and a method for driving the same are described. The display device includes a plurality of pixels, a driving characteristic compensator for sensing driving characteristics of the pixels, generating first power source voltage information according to a change in the driving characteristics, and updating an RGB gamma look up table, a memory for storing the first power source voltage information and the RGB gamma look-up table, a power source manager for generating a first power source voltage based on the first power source voltage information, and a gamma controller for generating reference gamma voltages by dividing the first power source voltage supplied from the power source manager based on the RGB gamma look-up table. Therefore, power consumption of the display device may be reduced.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: January 11, 2022
    Inventors: Ki Hyun Pyun, Eun Jin Choi
  • Patent number: 11189226
    Abstract: The present disclosure provides a display device. The display device includes a gain provider for gradually decreasing a gain value from a first time when a first period elapses from a time at which an enable signal is generated, and a plurality of pixels for receiving data voltages determined by the gain value and the input grayscale values. The gain provider determines a length of the first period according to a first load value based on the input grayscale values at the time at which the enable signal is generated.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: November 30, 2021
    Inventors: Ki Hyun Pyun, Hee Sook Park
  • Patent number: 11189234
    Abstract: Provided are a display device and a driving method thereof. The display device includes: a display panel for displaying an image, based on data signals supplied from data lines; a load controller for determining a scale factor for controlling a target luminance of the image displayed in the display panel, based on a load of first image data input from the outside; and a data driver for outputting data signals to the data lines, corresponding to the first image data corrected using the scale factor. The data driver includes a plurality of data driver chips coupled to at least one data line among the data lines. The load controller determines the scale factor, based on at least one of a total load of the first image data and local loads with respect to the respective data driver chips.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: November 30, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ki Hyun Pyun, Sung In Kang, Kyun Ho Kim
  • Publication number: 20210359688
    Abstract: A clock data recovery circuit includes a phase-locked loop circuit generating a multi-phase clock signal based on input data, the phase-locked loop circuit including a multi-rate phase detector being operable at an initial rate among a plurality of rates in an initial period; a lock detector generating a lock-enable signal by detecting a lock state of the phase-locked loop circuit; a dead zone calibration circuit determining an operational rate corresponding to a data rate of the input data among the plurality of rates in response to the lock-enable signal; and a digital block controlling the multi-rate phase detector to operate at the operational rate, and generating a calibration-enable signal. The dead zone calibration circuit determines whether the multi-phase clock signal is locked within a dead zone in response to the calibration-enable signal, and changes a phase of the multi-phase clock signal based on the multi-phase clock signal.
    Type: Application
    Filed: February 25, 2021
    Publication date: November 18, 2021
    Inventors: Ki Hyun PYUN, Hee SooK PARK
  • Publication number: 20210350764
    Abstract: A display device comprises a display area including a plurality of pixels, a peak driving determination part determining peak driving based on an input image signal, a normal driving compensation part including a first luminance lookup table having a first luminance as a peak luminance, a peak driving compensation part including a second luminance lookup table having a second luminance higher than the first luminance as a peak luminance, a compensation adjusting part that generates a peak driving gamma curve by smoothing a first and second luminance gamma curves corresponding to the first and second luminance lookup tables and generates a peak driving lookup table according to the peak driving gamma curve, and a signal controller generating an image data signal by applying one normal driving lookup table to a portion of the display area and applying the peak driving lookup table to an other portion of the display area.
    Type: Application
    Filed: December 23, 2020
    Publication date: November 11, 2021
    Inventors: Ki Hyun PYUN, Eun Jin CHOI
  • Publication number: 20210327338
    Abstract: A display device includes: a gain provider configured to set a time point elapsed by a set period from a time point at which a first region of an input image is detected as a still region, as a set time, and to gradually decrease a gain value from the set time; and a grayscale converter configured to generate an output image by applying the gain value to the first region and a second region including a peripheral region of the first region among the input image, wherein the gain provider is configured to set the set period differently according to size of grayscale values in the first region.
    Type: Application
    Filed: December 14, 2020
    Publication date: October 21, 2021
    Inventors: Hee Sook PARK, Ki Hyun PYUN
  • Publication number: 20210319739
    Abstract: A display device includes a display panel having a plurality of pixels, a controller configured to determine a peak luminance based on a target luminance and a black duty ratio that is a ratio of a black insertion period to a sum of an image display period and the black insertion period, to determine gray-luminance information representing a plurality of luminances respectively corresponding to a plurality of gray levels based on the peak luminance and a target gamma value, and to generate gray-voltage information representing a plurality of voltage levels respectively corresponding to the plurality of gray levels based on a target white color coordinate and the gray-luminance information, a gray voltage generator configured to generate a plurality of gray voltages having the plurality of voltage levels based on the gray-voltage information, and a data driver configured to provide the plurality of gray voltages corresponding to output image data as data voltages to the plurality of pixels in the image display
    Type: Application
    Filed: November 3, 2020
    Publication date: October 14, 2021
    Inventors: Ki Hyun PYUN, Hee Sook PARK