Patents by Inventor Jae Keun LIM

Jae Keun LIM 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: 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
  • Publication number: 20210375201
    Abstract: A pixel of an organic light emitting diode display device includes a capacitor, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor and an organic light emitting diode. The third transistor includes first and second sub-transistors which are coupled to each other in series between a drain of the first transistor and a gate node, and a fourth transistor includes third and fourth sub-transistors which are coupled to each other in series between a line of an initialization voltage and the gate node. The eighth transistor applies a reference voltage to a first node between the first and second sub-transistors in response to an emission signal, and a ninth transistor applies the reference voltage to a second node between the third and fourth sub-transistors in response to the emission signal.
    Type: Application
    Filed: March 17, 2021
    Publication date: December 2, 2021
    Inventors: Sehyuk PARK, Jae Keun LIM, Hong Soo KIM, Jin Young ROH, 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
  • Patent number: 11170694
    Abstract: A display apparatus including: a display panel configured to display an image based on input image data; a data driver configured to output a data voltage to the display panel; and a driving controller configured to determine a driving frequency of the display panel based on flicker values for grayscale values of the input image data and output a driving frequency signal representing the driving frequency of the display panel to a host.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: November 9, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyo Jin Lee, Jae Keun Lim, Hong Soo Kim, Jinyoung Roh, Sehyuk Park
  • 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: 11145250
    Abstract: Provided herein may be an organic light emitting display device including: pixels coupled both to power source lines and scan lines that are formed on respective horizontal lines, and to data lines formed on respective vertical lines; a scan driver configured to supply scan signals to the scan lines; a first power source driver configured to supply first power sources to the power source lines; and a data driver configured to supply data signals to the data lines. The first power source driver may control light emitting operations of the pixels by successively stopping the supply of the first power sources to the power source lines.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: October 12, 2021
    Inventors: Cheol Min Kim, Dong Won Lee, Jae Keun Lim
  • Patent number: 11087679
    Abstract: A pixel and a display device including the same. The pixel includes: a pixel circuit configured to control the amount of current to be supplied to an organic light-emitting diode in response to a data signal provided from a data line; and a light sensor circuit coupled between the data line and the pixel circuit and configured to control the amount of current to be supplied to the pixel circuit in response to incident light.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 10, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae Keun Lim, Jeong Kyoo Kim, Dong Won Lee
  • Publication number: 20210193048
    Abstract: A scan driver includes: a plurality of first stages configured to sequentially output a plurality of intermediate scan signals based on a scan start signal; a plurality of masking transistors respectively connected to a plurality of output terminals of the plurality of first stages, and configured to selectively transfer the plurality of intermediate scan signals in response to a masking signal, respectively; and a plurality of second stages including a plurality of input terminals respectively connected to the plurality of masking transistors, and configured to selectively output a plurality of scan signals based on the plurality of intermediate scan signals selectively transferred by the plurality of masking transistors.
    Type: Application
    Filed: August 31, 2020
    Publication date: June 24, 2021
    Inventors: Jae Keun LIM, Jin Young ROH, Sehyuk PARK, Hyo Jin LEE
  • Publication number: 20210133416
    Abstract: A display device has a display area with a first area in which a fingerprint is recognized and a second area in which a fingerprint is not recognized, and a non-display area. A fingerprint sensing unit is disposed to overlap with the first area. A first pixel set is disposed to overlap with the first area, and a second pixel set is disposed to overlap with the second area, each set including a plurality of pixels. A first voltage signal is provided to the first pixel set as a variable frequency signal, and includes a first period during which the first voltage signal is a first frequency signal, a second period during which the first voltage signal is a second frequency signal having a lower frequency than the first frequency signal, and a third period during which the first voltage signal is the first frequency signal.
    Type: Application
    Filed: January 12, 2021
    Publication date: May 6, 2021
    Inventors: Jeon Kyoo KIM, Jun Yong SONG, Jae Keun LIM
  • Patent number: 10997923
    Abstract: A scan driver includes a charging part configured to charge a next scan signal in response to a sensing selection signal in an active period of a frame period, and an output control part configured to output the second clock signal in response to a voltage charged in the charging part in a vertical blank period of the frame period.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 4, 2021
    Assignee: Samsung Display Co., Lid.
    Inventors: Jae Keun Lim, Jun Yong Song, Jeonkyoo Kim
  • 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
  • Publication number: 20210049949
    Abstract: A display apparatus including: a display panel configured to display an image based on input image data; a data driver configured to output a data voltage to the display panel; and a driving controller configured to determine a driving frequency of the display panel based on flicker values for grayscale values of the input image data and output a driving frequency signal representing the driving frequency of the display panel to a host.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 18, 2021
    Inventors: Hyo Jin LEE, Jae Keun LIM, Hong Soo KIM, Jinyoung ROH, Sehyuk PARK
  • Patent number: 10922516
    Abstract: A display device has a display area with a first area in which a fingerprint is recognized and a second area in which a fingerprint is not recognized, and a non-display area. A fingerprint sensing unit is disposed to overlap with the first area. A first pixel set is disposed to overlap with the first area, and a second pixel set is disposed to overlap with the second area, each set including a plurality of pixels. A first voltage signal is provided to the first pixel set as a variable frequency signal, and includes a first period during which the first voltage signal is a first frequency signal, a second period during which the first voltage signal is a second frequency signal having a lower frequency than the first frequency signal, and a third period during which the first voltage signal is the first frequency signal.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: February 16, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jeon Kyoo Kim, Jun Yong Song, Jae Keun Lim
  • Patent number: 10902780
    Abstract: A display device includes data lines, scan lines, and pixels. Each of the pixels includes an organic light emitting diode, a first transistor (OLED), and a second transistor. The first transistor is electrically connected to an anode of the OLED. The second transistor is electrically connected to the first transistor, a scan line among the scan lines, and a data line among the data lines. The second transistors of the pixels may receive instances of a reference voltage from the data lines during a first period of a frame. The second transistors of the pixels may simultaneously receive instances of a turn-on scan signal from the scan lines during the first period of the frame. Cathodes of the OLEDs of the pixels may receive instances of a turn-off voltage for the OLEDs to turn off during the first period of the frame.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: January 26, 2021
    Inventors: Jeon Kyoo Kim, Oh Jo Kwon, Jiwoong Kim, JunYong Song, Dong Won Lee, Jae Keun Lim
  • Publication number: 20200265776
    Abstract: A display device includes a plurality of pixels respectively coupled to first scan lines, second scan lines and data lines; and a scan driver to supply first scan signals to the first scan lines and second scan signals to the second scan lines, wherein the pixel includes a first transistor having a gate electrode connected to a first node, one electrode connected to a first power line, and other electrode connected to a second node; a second transistor having a gate electrode connected to a first scan line, one electrode connected to a data line, and other electrode connected to the first node, the second transistor being turned on in a first time period of a frame when the first scan signal is applied; a third transistor having a gate electrode connected to a second scan line, one electrode connected to the second node, and other electrode connected to an initialization line, the third transistor being turned on in the first time period and at least one second time period of the frame when the second scan si
    Type: Application
    Filed: December 18, 2019
    Publication date: August 20, 2020
    Inventors: Jun Yong Song, Jeong Kyoo Kim, Jae Keun Lim
  • Publication number: 20200193911
    Abstract: A scan driver includes a charging part configured to charge a next scan signal in response to a sensing selection signal in an active period of a frame period, and an output control part configured to output the second clock signal in response to a voltage charged in the charging part in a vertical blank period of the frame period.
    Type: Application
    Filed: November 26, 2019
    Publication date: June 18, 2020
    Inventors: Jae Keun LIM, Jun Yong SONG, Jeonkyoo KIM
  • Publication number: 20200118488
    Abstract: An organic light emitting display device includes a display part including a plurality of scan lines, a plurality of data lines, a plurality of power source lines, and a plurality of pixels each including an organic light emitting diode, a driving transistor coupled to the organic light emitting diode and to a power source line of the power source lines, and a switching transistor coupled to a scan line of the scan lines and to a data line of the data lines, and a sensing driver configured to sample a sensing current from the power source line while a sensing data voltage is applied to one of the pixels, and to calculate a threshold voltage value of the driving transistor using the sensing current in a sensing mode.
    Type: Application
    Filed: October 4, 2019
    Publication date: April 16, 2020
    Inventors: Jiwoong KIM, Ohjo KWON, Jeon Kyoo KIM, Jae Keun LIM
  • Publication number: 20200098315
    Abstract: A pixel and a display device including the same. The pixel includes: a pixel circuit configured to control the amount of current to be supplied to an organic light-emitting diode in response to a data signal provided from a data line; and a light sensor circuit coupled between the data line and the pixel circuit and configured to control the amount of current to be supplied to the pixel circuit in response to incident light.
    Type: Application
    Filed: September 11, 2019
    Publication date: March 26, 2020
    Inventors: Jae Keun LIM, Jeong Kyoo KIM, Dong Won LEE
  • Publication number: 20200090590
    Abstract: A display device includes data lines, scan lines, and pixels. Each of the pixels includes an organic light emitting diode, a first transistor (OLED), and a second transistor. The first transistor is electrically connected to an anode of the OLED. The second transistor is electrically connected to the first transistor, a scan line among the scan lines, and a data line among the data lines. The second transistors of the pixels may receive instances of a reference voltage from the data lines during a first period of a frame. The second transistors of the pixels may simultaneously receive instances of a turn-on scan signal from the scan lines during the first period of the frame. Cathodes of the OLEDs of the pixels may receive instances of a turn-off voltage for the OLEDs to turn off during the first period of the frame.
    Type: Application
    Filed: May 2, 2019
    Publication date: March 19, 2020
    Inventors: Jeon Kyoo KIM, Oh Jo KWON, Jiwoong KIM, JunYong SONG, Dong Won LEE, Jae Keun LIM