Patents by Inventor Se Hyuk PARK

Se Hyuk PARK 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: 11227555
    Abstract: A display device includes a display panel including a plurality of pixels, a data driver which provides data signals to the plurality of pixels, and a controller which controls the data driver. The controller writes frame data to a frame memory, reads the frame data in each of a plurality of frame periods, performs in a first frame period of the plurality of frame periods a still image detection operation that determines whether the frame data represent a still image, and does not performs the still image detection operation in a second frame period of the plurality of frame periods subsequent to the first frame period.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: January 18, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyuk Park, Hong Soo Kim, Jin Young Roh, Hyo Jin Lee, Jae Keun Lim
  • Publication number: 20220006077
    Abstract: A negative electrode active material includes: a silicon based particle; a carbon coating layer formed on a surface of the silicon based particle and including a transition metal; and carbon nanotubes (CNT), wherein one ends of the carbon nanotubes are connected to the transition metal, and a content of the transition metal is 0.03 to 30 parts by weight based on 100 parts by weight of a sum of the carbon coating layer and the carbon nanotubes.
    Type: Application
    Filed: November 11, 2019
    Publication date: January 6, 2022
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Dong Hyuk KIM, Il Geun OH, Yong Ju LEE, Se Mi PARK
  • Publication number: 20210407436
    Abstract: A display device includes: a pixel configured to display an image based on image data and a reference voltage; a controller configured to generate reference voltage data corresponding to the reference voltage for restraining leakage current in the pixel based on a frame frequency; and a power supply configured to generate the reference voltage based on the reference voltage data and supply the reference voltage to the pixel.
    Type: Application
    Filed: January 5, 2021
    Publication date: December 30, 2021
    Inventors: Se Hyuk PARK, Hong Soo KIM, Jin Young ROH, Hyo Jin LEE, Jae Keun LIM
  • Publication number: 20210398490
    Abstract: A display device includes: a pixel part including a plurality of pixels; a first scan driver to provide a first scan signal to each of the pixels; and an initialization controller to control the first scan driver. Each of the pixels includes a pixel circuit including a plurality of transistors, and a light emitting element connected to the pixel circuit, an anode of the light emitting element is to be initialized to a first initialization voltage in response to the first scan signal having a gate-on level, and the initialization controller is to determine whether to provide the first scan signal having the gate-on level to each of the pixels for each frame.
    Type: Application
    Filed: December 15, 2020
    Publication date: December 23, 2021
    Inventors: Se Hyuk PARK, Ji Youn KIM, Hong Soo KIM, Jin Young ROH, Hyo Jin LEE, Jae Keun LIM
  • Publication number: 20210390898
    Abstract: A display device includes: a pixel part to display an image and including pixels receiving a reference voltage; a controller to determine a value of the reference voltage based on a load of the entire pixel part, and to control a grayscale range of image data according to a location in the pixel part based on the reference voltage; a data driver to supply data voltages to the pixel part through data lines based on grayscale ranges adjusted for each location in the pixel part; and a scan driver to supply a scan signal to the pixels through scan lines.
    Type: Application
    Filed: May 13, 2021
    Publication date: December 16, 2021
    Inventors: Jin Young ROH, Hyo Jin LEE, Jae Keun LIM, Hong Soo KIM, Se Hyuk PARK
  • Patent number: 11195468
    Abstract: A display apparatus includes a display panel, a first gate driver, a second gate driver, a third gate driver, and a data driver. The display apparatus is operable in a low frequency driving mode, and the low frequency driving mode includes a writing frame and a holding frame. At least one of gate power voltages used to generate a first gate signal, a second gate signal, and an emission signal has a first voltage level in the writing frame of the low frequency driving mode and a second voltage level in the holding frame of the low frequency driving mode. The data voltage is applied to the pixel in the writing frame of the low frequency driving mode. The data voltage applied to the pixel in the writing frame of the low frequency driving mode is maintained in the holding frame of the low frequency driving mode.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: December 7, 2021
    Inventors: Se Hyuk Park, Hong Soo Kim, Jin Young Roh, Hyo Jin Lee, Jae Keun Lim
  • Patent number: 11183106
    Abstract: A display device includes a display unit. The display unit includes a first display area and a second display area. A first scan line, a first power line, and first pixels connected to the first scan line and the first power line are in the first display area. A second scan line, a second power line, and second pixels connected to the second scan line and the second power line are in the second display area. A scan driver is configured to sequentially provide a scan signal to the first scan line and the second scan line. A power supply is configured to provide a power source voltage that is varied independently to the first power line and the second power line.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: November 23, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyuk Park, Hyo Jin Lee, Sang An Kwon, Jin Young Roh
  • Publication number: 20210358396
    Abstract: A display device includes a first switching element including a second electrode and a first gate electrode, a second switching element including a third electrode connected with the first gate electrode, a third switching element including a fifth electrode connected with the second electrode, and sixth electrode, a fourth switching element including a seventh electrode connected with the second electrode, and an eighth electrode, a fifth switching element including a ninth electrode connected with the second electrode, and a tenth electrode, a first light emitting diode connected with the sixth electrode and the eighth electrode, a second light emitting diode connected with the eighth electrode and the sixth electrode, and a switch selectively connecting a common power source line with the sixth electrode or the eighth electrode. The first light emitting diode and the second light emitting diode have different polarities from each other with respect to a same direction.
    Type: Application
    Filed: August 2, 2021
    Publication date: November 18, 2021
    Inventors: Se Hyuk PARK, Hyo Jin LEE
  • Patent number: 11176876
    Abstract: A display device includes the following elements: a display panel including a first pixel emitting first-color light, a second pixel emitting second-color light, and a third pixel emitting third-color light; a controller generating generated image data based on input image data according to a driving frequency of the display panel, and generating output image data using the generated image data; and a data driver supplying data signals to the display panel based on the output image data. The input image data includes first, second, and third grayscales for the first, second, and third pixels, respectively. The generated image data includes first, second, and third generated grayscales for the first, second, and third pixels, respectively, with different ratios to the first, second, and third grayscales, respectively.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: November 16, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyo Jin Lee, Hong Soo Kim, Jin Young Roh, Se Hyuk Park, Jae Keun Lim
  • Publication number: 20210335275
    Abstract: A display device includes a display panel including a plurality of pixels, a data driver which provides data signals to the plurality of pixels, and a controller which controls the data driver. The controller writes frame data to a frame memory, reads the frame data in each of a plurality of frame periods, performs in a first frame period of the plurality of frame periods a still image detection operation that determines whether the frame data represent a still image, and does not performs the still image detection operation in a second frame period of the plurality of frame periods subsequent to the first frame period.
    Type: Application
    Filed: February 9, 2021
    Publication date: October 28, 2021
    Inventors: Se Hyuk PARK, Hong Soo KIM, Jin Young ROH, Hyo Jin LEE, Jae Keun LIM
  • Publication number: 20210327323
    Abstract: A display device includes a display panel including a plurality of pixels, and a panel driver including N registers, where N is an integer greater than 1. The panel driver is configured to divide the display panel into N first detection regions, to perform a first still image detection operation on each of the N first detection regions by using the N registers, to divide the display panel into N second detection regions different from the N first detection regions by using a result of the first still image detection operation, and to perform a second still image detection operation on each of the N second detection regions by using the N registers.
    Type: Application
    Filed: November 17, 2020
    Publication date: October 21, 2021
    Inventors: HONG SOO KIM, JIN YOUNG ROH, SE HYUK PARK, HYO JIN LEE, JAE KEUN LIM, JUN HEYUNG JUNG
  • Patent number: 11081045
    Abstract: A display device includes a first switching element including a second electrode and a first gate electrode, a second switching element including a third electrode connected with the first gate electrode, a third switching element including a fifth electrode connected with the second electrode, and sixth electrode, a fourth switching element including a seventh electrode connected with the second electrode, and an eighth electrode, a fifth switching element including a ninth electrode connected with the second electrode, and a tenth electrode, a first light emitting diode connected with the sixth electrode and the eighth electrode, a second light emitting diode connected with the eighth electrode and the sixth electrode, and a switch selectively connecting a common power source line with the sixth electrode or the eighth electrode. The first light emitting diode and the second light emitting diode have different polarities from each other with respect to a same direction.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: August 3, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyuk Park, Hyo Jin Lee
  • Patent number: 10996504
    Abstract: A display device includes a first pixel including a first light emitting diode (“LED”) and a second LED having a color different from that of the first LED, a second pixel including a third LED having a same color as that of the first LED, a third pixel including a fourth LED having a same color as that of the first LED, and a color filter layer including a first color filter located on the first pixel, a second color filter that has a color different from a color of the first color filter and is located on the second pixel, and a third color filter that has a color different from the colors of the first and second color filters and is located on the third pixel.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: May 4, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyuk Park, Hyo Jin Lee
  • Publication number: 20210125559
    Abstract: A display apparatus includes a display panel, a first gate driver, a second gate driver, a third gate driver, and a data driver. The display apparatus is operable in a low frequency driving mode, and the low frequency driving mode includes a writing frame and a holding frame. At least one of gate power voltages used to generate a first gate signal, a second gate signal, and an emission signal has a first voltage level in the writing frame of the low frequency driving mode and a second voltage level in the holding frame of the low frequency driving mode. The data voltage is applied to the pixel in the writing frame of the low frequency driving mode. The data voltage applied to the pixel in the writing frame of the low frequency driving mode is maintained in the holding frame of the low frequency driving mode.
    Type: Application
    Filed: September 8, 2020
    Publication date: April 29, 2021
    Inventors: Se Hyuk PARK, Hong Soo KIM, Jin Young ROH, Hyo Jin LEE, Jae Keun LIM
  • Patent number: 10984707
    Abstract: A pixel includes: a first transistor configured to generate a driving current corresponding to a data signal transmitted from a corresponding data line; a first light emitting diode (LED) including a cathode connected to a first power supply line and an anode connected to a second power supply line, and configured to emit light by the driving current; a second light emitting diode (LED) including a cathode connected to the second power supply line and an anode connected to the first power supply line, and configured to emit light by the driving current; a second transistor connected to the anode of the first light emitting diode (LED), and configured to transmit the driving current to the first light emitting diode (LED); and a third transistor connected to the anode of the second light emitting diode (LED), and configured to transmit the driving current to the second light emitting diode (LED.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: April 20, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyo Jin Lee, Se Hyuk Park
  • Patent number: 10964270
    Abstract: A method of driving a pixel including: during a first period of a first frame, applying a first scan signal having a turn-on level to the first scan line, applying a data voltage to a data line, and applying a second scan signal having the turn-on level to the second scan line; and during a second period of a second frame, applying the first scan signal having the turn-on level to the first scan line, applying a bias voltage to the data line, and applying the second scan signal having a turn-off level to the second scan line, the second frame is a frame subsequent to the first frame, the second period is longer than the first period, and a light-emitting diode emits light at luminance based on the data voltage during at least a portion of the first frame and at least a portion of the second frame.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: March 30, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Woong Kim, Oh Jo Kwon, Hyo Jin Lee, Se Hyuk Park
  • Publication number: 20200372853
    Abstract: A display device includes a display unit. The display unit includes a first display area and a second display area. A first scan line, a first power line, and first pixels connected to the first scan line and the first power line are in the first display area. A second scan line, a second power line, and second pixels connected to the second scan line and the second power line are in the second display area. A scan driver is configured to sequentially provide a scan signal to the first scan line and the second scan line. A power supply is configured to provide a power source voltage that is varied independently to the first power line and the second power line.
    Type: Application
    Filed: February 18, 2020
    Publication date: November 26, 2020
    Inventors: Se Hyuk PARK, Hyo Jin LEE, Sang An KWON, Jin Young ROH
  • Publication number: 20200294451
    Abstract: A method of driving a pixel including: during a first period of a first frame, applying a first scan signal having a turn-on level to the first scan line, applying a data voltage to a data line, and applying a second scan signal having the turn-on level to the second scan line; and during a second period of a second frame, applying the first scan signal having the turn-on level to the first scan line, applying a bias voltage to the data line, and applying the second scan signal having a turn-off level to the second scan line, the second frame is a frame subsequent to the first frame, the second period is longer than the first period, and a light-emitting diode emits light at luminance based on the data voltage during at least a portion of the first frame and at least a portion of the second frame.
    Type: Application
    Filed: March 12, 2020
    Publication date: September 17, 2020
    Inventors: Ji Woong Kim, Oh Jo Kwon, Hyo Jin Lee, Se Hyuk Park
  • Patent number: 10770001
    Abstract: A flicker quantification system includes a display device driven in units of reference periods having a first frame for writing data and at least one second frame for holding data. A luminance measurer generates luminance data by measuring a luminance of a display during the reference period. A voltage measurer measures a voltage of a photo sensor corresponding to light emitted. First voltage data representing an accumulation amount of voltage during the first frame and second voltage data representing an accumulation amount of voltage during the at least one second frame is generated. A processor calculates a flicker index value representing a ratio of a measured luminance difference to a just noticeable difference, based on the luminance data, the first voltage data, and the second voltage data. The measured luminance difference may represent the difference between a luminance during the first frame and a luminance during the second frame.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: September 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyuk Park, Hui Nam, Hyo Jin Lee
  • Publication number: 20200234632
    Abstract: A pixel includes: a first transistor configured to generate a driving current corresponding to a data signal transmitted from a corresponding data line; a first light emitting diode (LED) including a cathode connected to a first power supply line and an anode connected to a second power supply line, and configured to emit light by the driving current; a second light emitting diode (LED) including a cathode connected to the second power supply line and an anode connected to the first power supply line, and configured to emit light by the driving current; a second transistor connected to the anode of the first light emitting diode (LED), and configured to transmit the driving current to the first light emitting diode (LED); and a third transistor connected to the anode of the second light emitting diode (LED), and configured to transmit the driving current to the second light emitting diode (LED.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Inventors: Hyo Jin Lee, Se Hyuk Park