Patents by Inventor Byung-sik Koh

Byung-sik Koh 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: 10885844
    Abstract: A pixel may include a switching transistor connected to a data line and a first node, having a gate electrode connected to a scan line, a sustain transistor connected to a sustain voltage and the first node, having a gate electrode connected to the scan line, a storage capacitor connected to the first node and the second node, a driving transistor connected to the first power source voltage and a third node, having a gate electrode connected to the second node, a compensation transistor connected to the second node and the third node, having a gate electrode connected to a control line, a reset transistor connected to an initializing voltage and the second node, having a gate electrode connected to a reset control line, and an organic light emitting diode including an anode connected to the third node and a cathode connected to the second power source voltage.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: January 5, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Byung-Sik Koh
  • Publication number: 20180012548
    Abstract: A pixel may include a switching transistor connected to a data line and a first node, having a gate electrode connected to a scan line, a sustain transistor connected to a sustain voltage and the first node, having a gate electrode connected to the scan line, a storage capacitor connected to the first node and the second node, a driving transistor connected to the first power source voltage and a third node, having a gate electrode connected to the second node, a compensation transistor connected to the second node and the third node, having a gate electrode connected to a control line, a reset transistor connected to an initializing voltage and the second node, having a gate electrode connected to a reset control line, and an organic light emitting diode including an anode connected to the third node and a cathode connected to the second power source voltage.
    Type: Application
    Filed: September 13, 2017
    Publication date: January 11, 2018
    Inventor: Byung-Sik KOH
  • Patent number: 9269292
    Abstract: A method of setting target locations for reducing image sticking is provided. According to the method, a plurality of images, each of the images being displayed during each frame by an organic light emitting display device are acquired. The target locations at which image sticking frequently occurs are set by comparing the images. Image data corresponding to the target locations are stored in a memory unit. A plurality of pixel circuits may simultaneously emit light in the organic light emitting display device.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: February 23, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Byung-Sik Koh
  • Patent number: 9049438
    Abstract: A stereoscopic image display device and a driving method thereof are disclosed. According to one aspect, the device includes a scan driver and a data driver configured to transmit scan signals and data signals to scan lines and data lines respectively, a light emission driver configured to transmit light emission control signals to light emission control lines, and a display unit divided into pixel areas including pixel lines. A controller is configured to control the drivers, generate a left-eye and right-eye image data signals, and supply the generated signals to the data driver. The light emission driver includes light emitting circuits configured to sequentially transmit light emission control signals that are equivalent to each other to light emission control lines of the corresponding pixel area.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: June 2, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: June-Young Song, Byung-Sik Koh, Hye-Jin Shin
  • Publication number: 20140240368
    Abstract: A pixel may include a switching transistor connected to a data line and a first node, having a gate electrode connected to a scan line, a sustain transistor connected to a sustain voltage and the first node, having a gate electrode connected to the scan line, a storage capacitor connected to the first node and the second node, a driving transistor connected to the first power source voltage and a third node, having a gate electrode connected to the second node, a compensation transistor connected to the second node and the third node, having a gate electrode connected to a control line, a reset transistor connected to an initializing voltage and the second node, having a gate electrode connected to a reset control line, and an organic light emitting diode including an anode connected to the third node and a cathode connected to the second power source voltage.
    Type: Application
    Filed: October 11, 2013
    Publication date: August 28, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventor: Byung-Sik KOH
  • Publication number: 20130257884
    Abstract: A method of setting target locations for reducing image sticking is provided. According to the method, a plurality of images, each of the images being displayed during each frame by an organic light emitting display device are acquired. The target locations at which image sticking frequently occurs are set by comparing the images. Image data corresponding to the target locations are stored in a memory unit. A plurality of pixel circuits may simultaneously emit light in the organic light emitting display device.
    Type: Application
    Filed: February 28, 2013
    Publication date: October 3, 2013
    Inventor: Byung-Sik KOH
  • Patent number: 8531099
    Abstract: An organic light emitting diode (OLED) display includes a substrate, an organic light emitting element including a first electrode, an organic emission layer, and a second electrode on the substrate, a driving thin film transistor turning on/off first power supplied to the first electrode and including a first active layer including zinc oxide (ZnO), a photo sensor disposed between the substrate and the organic emission layer and including a second active layer sensing light emitted from the organic emission layer, and a controller controlling at least one of the first power and a second power supplied to the second electrode according to the intensity of the light sensed by the photo sensor.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: September 10, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Byung-Sik Koh
  • Patent number: 8525761
    Abstract: A display device and a method of driving the same are provided. The display device includes a scan driver that generates a plurality of scanning signals, a data driver that generates a data voltage, and a plurality of pixels that receive the data voltage according to the scanning signal and that display luminance corresponding to the data voltage. Each pixel receives its own data voltage and a data voltage of other pixels while displaying a black color when its own scanning signal is in a first state, and stops reception of the data voltage and displays luminance corresponding to its own data voltage when its own scanning signal is in a second state.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: September 3, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Si-Duk Sung, Byung-Sik Koh, Young-Il Kim, Kyong-Tae Park
  • Patent number: 8432388
    Abstract: An organic light emitting display device includes: a scan driver for supplying scan signals to scan lines and an emission control signal to an emission control line during a scan period; a data driver for supplying data signals to data lines; a second power supply supplying a second power at a high voltage level during the scan period and at a low voltage level during an emission period; and a plurality of pixels located at crossing regions of the scan lines and the data lines, the pixels controlling the amount of current supplied through organic light emitting diodes (OLEDs), each of the pixels located in an i-th horizontal line including: a second transistor having a second electrode coupled with an OLED; and a first transistor coupled between the second transistor and a data line and turned on when a scan signal is supplied to the i-th scan line.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: April 30, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Byung-Sik Koh
  • Patent number: 8378936
    Abstract: In a display apparatus and a driving method thereof, image data corresponding to plural different positions of a display panel are added to each other, and a sum of the image data of a present frame is compared with a sum of the image data of a previous frame to determine whether an image displayed on the display panel is a still image or not. While a still image is displayed, brightness of the display panel is gradually lowered. Accordingly, the display panel may prevent occurrence of afterimages and deterioration of organic electroluminescent light emitting devices, as well as reduce power consumption.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: February 19, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byung-Sik Koh, Si-Duk Sung, Kwang-Sub Shin, Jong-Hwa Park
  • Publication number: 20120147000
    Abstract: A stereoscopic image display device and a driving method thereof are disclosed. According to one aspect, the device includes a scan driver and a data driver configured to transmit scan signals and data signals to scan lines and data lines respectively, a light emission driver configured to transmit light emission control signals to light emission control lines, and a display unit divided into pixel areas including pixel lines. A controller is configured to control the drivers, generate a left-eye and right-eye image data signals, and supply the generated signals to the data driver. The light emission driver includes light emitting circuits configured to sequentially transmit light emission control signals that are equivalent to each other to light emission control lines of the corresponding pixel area.
    Type: Application
    Filed: November 18, 2011
    Publication date: June 14, 2012
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: June-Young Song, Byung-Sik Koh, Hye-Jin Shin
  • Publication number: 20120043894
    Abstract: An organic light emitting diode (OLED) display includes a substrate, an organic light emitting element including a first electrode, an organic emission layer, and a second electrode on the substrate, a driving thin film transistor turning on/off first power supplied to the first electrode and including a first active layer including zinc oxide (ZnO), a photo sensor disposed between the substrate and the organic emission layer and including a second active layer sensing light emitted from the organic emission layer, and a controller controlling at least one of the first power and a second power supplied to the second electrode according to the intensity of the light sensed by the photo sensor.
    Type: Application
    Filed: May 6, 2011
    Publication date: February 23, 2012
    Inventor: Byung-Sik Koh
  • Publication number: 20110279430
    Abstract: An organic light emitting display device includes: a scan driver for supplying scan signals to scan lines and an emission control signal to an emission control line during a scan period; a data driver for supplying data signals to data lines; a second power supply supplying a second power at a high voltage level during the scan period and at a low voltage level during an emission period; and a plurality of pixels located at crossing regions of the scan lines and the data lines, the pixels controlling the amount of current supplied through organic light emitting diodes (OLEDs), each of the pixels located in an i-th horizontal line including: a second transistor having a second electrode coupled with an OLED; and a first transistor coupled between the second transistor and a data line and turned on when a scan signal is supplied to the i-th scan line.
    Type: Application
    Filed: December 22, 2010
    Publication date: November 17, 2011
    Inventor: Byung-Sik Koh
  • Patent number: 8031143
    Abstract: A display device includes; an insulating substrate, a display element which defines a display region and includes an organic light emitting layer which is formed on the insulating substrate, a first circuit board disposed parallel with a first side of the insulating substrate, a reference voltage pad formed on a circumference of the display region and which is electrically connected to the display element, and a first flexible member which includes a first part which adheres to the first circuit board and a second part connected to the reference voltage pad along a second side of the face of the insulating substrate.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: October 4, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-duk Sung, Byung-sik Koh
  • Patent number: 8022900
    Abstract: An OLED display includes a pixel having a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, each of which displays a different color, a gate line for transmitting gate signals to the pixel, a data line for transmitting data signals to the pixel, a first driving voltage line that transmits a driving voltage to the pixel and is substantially parallel to the data line, and a second driving voltage line that is connected to the first driving voltage line and is substantially parallel to the gate line.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: September 20, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Sik Koh, Nam-Deog Kim, Beohm-Rock Choi, Kyeng-Eun Roh, Kwang-Chul Jung, Joon-Hoo Choi, Jong-Moo Huh, Seung-Kyu Park, Joon-Chul Goh, Young-Soo Yoon
  • Patent number: 7999466
    Abstract: A display device includes a display panel having a display region formed with a plurality of thin film transistors, a light emitting layer disposed in the display region, and a driver supplying a driving signal including a gate signal and a data signal to the thin film transistors. At least one voltage pad is disposed outside of the display region on the display panel to supply a reference voltage to the display region, a power generator generates the reference voltage, and a flexible film is connected between the voltage pad and the power generator to transmit the reference voltage. At least one of the driver and the power generator includes an external power input unit that receives external power.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: August 16, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Sik Koh, Chun-Seok Ko, Byoung-Seong Jeong, Si-Duk Sung
  • Patent number: 7948161
    Abstract: A display device includes an insulating substrate having an upper surface and a lower surface opposing the upper surface, a display element including a first electrode, an organic light emitting layer on the first electrode, and a second electrode on the organic light emitting layer, a first film connected to a first side of the upper surface, and a first circuit substrate connected to the first film and including a first surface facing the display element, a second surface opposing the first surface, and an electric element protruding from the second surface.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: May 24, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Duk Sung, Byung-Sik Koh
  • Patent number: 7884540
    Abstract: An organic light emitting diode display includes a display panel having a display area with a plurality of thin film transistors and a peripheral area provided along a circumference of the display area, an emission layer formed within the display area, a driver formed in the peripheral area which applies display signals including gate signals and data signals to the thin film transistors, a driving voltage pad formed in the peripheral area which applies a driving voltage to the display area, a common voltage pad formed in the peripheral area which applies a common voltage to the display area, a main connector connected to an external voltage source, and a flexible conductive film including a conductive layer electrically connecting between at least one of the driving voltage pad and the common voltage pad and the main connector. The organic light emitting diode display facilitates modulation due to a simple structure, and improves a voltage drop phenomenon.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: February 8, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Duk Sung, Byung-Sik Koh
  • Publication number: 20100164363
    Abstract: A display device includes an insulating substrate having an upper surface and a lower surface opposing the upper surface, a display element including a first electrode, an organic light emitting layer on the first electrode, and a second electrode on the organic light emitting layer, a first film connected to a first side of the upper surface, and a first circuit substrate connected to the first film and including a first surface facing the display element, a second surface opposing the first surface, and an electric element protruding from the second surface.
    Type: Application
    Filed: March 8, 2010
    Publication date: July 1, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Si-Duk SUNG, Byung-Sik Koh
  • Patent number: 7692372
    Abstract: A display device includes an insulating substrate having an upper surface and a lower surface opposing the upper surface, a display element including a first electrode, an organic light emitting layer on the first electrode, and a second electrode on the organic light emitting layer, a first film connected to a first side of the upper surface, and a first circuit substrate connected to the first film and including a first surface facing the display element, a second surface opposing the first surface, and an electric element protruding from the second surface.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: April 6, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Duk Sung, Byung-Sik Koh