Patents by Inventor Kyoung Don Woo

Kyoung Don Woo 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: 10217393
    Abstract: A display device includes: a display panel including pixels arranged in a matrix shape; and a source driver to apply data voltages to the pixels. The source driver includes: a shift controller to shift a sampling control signal; a latch array to sample digital video data in response to the sampling control signal shifted by the shift controller; a digital-to-analog converter array to convert the digital video data from the latch array into data voltages by decoding the digital video data and combination-outputting gamma compensation voltages on the basis of a gray value of the decoded data; an output buffer array to output the data voltages from the digital-to-analog converter array; and a bias controller to adjust a bias current, which is applied to the output buffer array, according to delay and stable intervals of the data voltage.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: February 26, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Ju Young Noh, Jun Hyeok Yang, Kyoung Don Woo
  • Patent number: 10008156
    Abstract: There is provided a display device including: a display panel including a display area consisting of a plurality of pixel areas, and a non-display area surrounding the display area; a plurality of power lines formed on the display area to supply a first voltage to the plurality of pixel areas; a first power link line connected to the plurality of first power lines, and formed on the non-display area; and a plurality of drivers connected to the display panel, and including a plurality of output pads and a plurality of first power pads, the plurality of (first) power pads disposed between the plurality of output pads and respectively connected to the plurality of first power link lines.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: June 26, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Young-Jun Hong, Kyoung-Don Woo
  • Patent number: 9576523
    Abstract: There is provided a display device including: a display panel including a display area consisting of a plurality of pixel areas, and a non-display area surrounding the display area; a plurality of power lines formed on the display area to supply a first voltage to the plurality of pixel areas; a first power link line connected to the plurality of first power lines, and formed on the non-display area; and a plurality of drivers connected to the display panel, and including a plurality of output pads and a plurality of first power pads, the plurality of (first) power pads disposed between the plurality of output pads and respectively connected to the plurality of first power link lines.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: February 21, 2017
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hye-Rim Kim, Bum-Sik Kim, Kyoung-Don Woo
  • Publication number: 20160180764
    Abstract: A display device includes: a display panel including pixels arranged in a matrix shape; and a source driver to apply data voltages to the pixels. The source driver includes: a shift controller to shift a sampling control signal; a latch array to sample digital video data in response to the sampling control signal shifted by the shift controller; a digital-to-analog converter array to convert the digital video data from the latch array into data voltages by decoding the digital video data and combination-outputting gamma compensation voltages on the basis of a gray value of the decoded data; an output buffer array to output the data voltages from the digital-to-analog converter array; and a bias controller to adjust a bias current, which is applied to the output buffer array, according to delay and stable intervals of the data voltage.
    Type: Application
    Filed: December 14, 2015
    Publication date: June 23, 2016
    Applicant: LG Display Co., Ltd.
    Inventors: Ju Young NOH, Jun Hyeok YANG, Kyoung Don WOO
  • Patent number: 9111491
    Abstract: An organic light emitting display device includes a display panel including a plurality of pixels having an organic light emitting diode and a pixel circuit; a gate driver to supply the plurality of pixels with a scan signal, a sensing signal, and a driving voltage; a data driver to supply data voltages and a reference voltage to the plurality of pixels in a driving mode, and sense voltages charged into the plurality of pixels in a sensing mode; a discharging driving unit to initialize voltages of a plurality of sensing power lines when the display device switches from the driving mode to the sensing mode; a timing controller to control the gate driver, the data driver, and the discharging driving unit to operate in and switch between the driving mode and the sensing mode; and a memory to store compensation data for the plurality of pixels.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 18, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Kyoung Don Woo, Nari Kim, Jae Hoon Jung
  • Patent number: 9070315
    Abstract: A display device is disclosed which includes: a control substrate configured to include a timing controller; a data connector configured to transfer signal from the control substrate to a display panel; a data driver mounted to the data connector; at least one outer connector disposed by at least one of both sides of the data connector and loaded with a driver chip, wherein the driver chip and the data driver are loaded on the outer connector and the data connector using the same bonding system, respectively.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: June 30, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Moo Kyoung Hong, Kyoung Don Woo, Eun Jeong Jin
  • Patent number: 8976206
    Abstract: A display device is disclosed. The device includes: a timing controller configured to derive data signals for a display panel from external signals; a date driver configured to derive data voltages from the data signals and apply the data voltage to data lines on the display panel; a gamma IC (integrated circuit) chip configured to apply gamma voltages to the data driver; a power supply IC chip configured to apply a most significant voltage to the data driver; a DAC (digital-to-analog converter) configured to receive the gamma voltages and the most significant voltage from the gamma IC chip and the power supply IC chip and generate the data voltages opposite to the data signals; and a power supply unit configured to convert the gamma voltages and the most significant voltage using the data signals and apply the converted voltages to the DAC.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 10, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Tae Gung Kim, Kyoung Don Woo, Moo Kyoung Hong
  • Patent number: 8917295
    Abstract: A display device, such as a OLED device, and a method of driving the OLED device. The display device includes a gamma voltage generator that generates sequentially decreasing gamma voltages based on sequentially decreasing reference voltages. A data driver selects a gamma voltage from the gamma voltages for driving a pixel based on digital data indicative of a gray scale level for the pixel. In one embodiment the gamma voltage generator includes a resistor string and an input tab that is electrically isolated from the resistor string.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: December 23, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Kyoung Don Woo, Eun Jeong Jin
  • Publication number: 20140176525
    Abstract: An organic light emitting display device includes a display panel including a plurality of pixels having an organic light emitting diode and a pixel circuit; a gate driver to supply the plurality of pixels with a scan signal, a sensing signal, and a driving voltage; a data driver to supply data voltages and a reference voltage to the plurality of pixels in a driving mode, and sense voltages charged into the plurality of pixels in a sensing mode; a discharging driving unit to initialize voltages of a plurality of sensing power lines when the display device switches from the driving mode to the sensing mode; a timing controller to control the gate driver, the data driver, and the discharging driving unit to operate in and switch between the driving mode and the sensing mode; and a memory to store compensation data for the plurality of pixels.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 26, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Kyoung Don Woo, Nari Kim, Jae Hoon Jung
  • Publication number: 20140111498
    Abstract: There is provided a display device including: a display panel including a display area consisting of a plurality of pixel areas, and a non-display area surrounding the display area; a plurality of power lines formed on the display area to supply a first voltage to the plurality of pixel areas; a first power link line connected to the plurality of first power lines, and formed on the non-display area; and a plurality of drivers connected to the display panel, and including a plurality of output pads and a plurality of first power pads, the plurality of (first) power pads disposed between the plurality of output pads and respectively connected to the plurality of first power link lines.
    Type: Application
    Filed: August 20, 2013
    Publication date: April 24, 2014
    Inventors: Hye-Rim Kim, Bum-Sik Kim, Kyoung-Don Woo
  • Publication number: 20140071107
    Abstract: There is provided a display device including: a display panel including a display area consisting of a plurality of pixel areas, and a non-display area surrounding the display area; a plurality of power lines formed on the display area to supply a first voltage to the plurality of pixel areas; a first power link line connected to the plurality of first power lines, and formed on the non-display area; and a plurality of drivers connected to the display panel, and including a plurality of output pads and a plurality of first power pads, the plurality of (first) power pads disposed between the plurality of output pads and respectively connected to the plurality of first power link lines.
    Type: Application
    Filed: December 26, 2012
    Publication date: March 13, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Young-Jun HONG, Kyoung-Don WOO
  • Patent number: 8654155
    Abstract: Disclosed is a display device including a first storage unit having driving data for driving a display panel and a first check SUM data on the driving data stored therein, a second storage unit for retrieving the driving data and the first check SUM data from the first storage unit and storing the driving data and the check SUM data in response to the instruction of a ROM interface, and a data error detection/correction unit generating a second check SUM data with reference to the driving data stored in the second storage unit.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: February 18, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Sang-Ho Yu, Kyoung-Don Woo, Young-Jun Hong
  • Publication number: 20130147861
    Abstract: A display device is disclosed. The device includes: a timing controller configured to derive data signals for a display panel from external signals; a date driver configured to derive data voltages from the data signals and apply the data voltage to data lines on the display panel; a gamma IC (integrated circuit) chip configured to apply gamma voltages to the data driver; a power supply IC chip configured to apply a most significant voltage to the data driver; a DAC (digital-to-analog converter) configured to receive the gamma voltages and the most significant voltage from the gamma IC chip and the power supply IC chip and generate the data voltages opposite to the data signals; and a power supply unit configured to convert the gamma voltages and the most significant voltage using the data signals and apply the converted voltages to the DAC.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 13, 2013
    Inventors: Tae Gung Kim, Kyoung Don Woo, Moo Kyoung Hong
  • Patent number: 8427397
    Abstract: The present disclosure relates to a light emitting diode display device which can prevent a drive switching device from degrading.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: April 23, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Yong-Il Kwon, Kyoung-Don Woo, Jae-Do Lee
  • Publication number: 20130083083
    Abstract: A display device, such as a OLED device, and a method of driving the OLED device. The display device includes a gamma voltage generator that generates sequentially decreasing gamma voltages based on sequentially decreasing reference voltages. A data driver selects a gamma voltage from the gamma voltages for driving a pixel based on digital data indicative of a gray scale level for the pixel. In one embodiment the gamma voltage generator includes a resistor string and an input tab that is electrically isolated from the resistor string.
    Type: Application
    Filed: April 11, 2012
    Publication date: April 4, 2013
    Applicant: LG DISPLAY CO. LTD.
    Inventors: Kyoung Don Woo, Eun Jeong Jin
  • Patent number: 8373689
    Abstract: An organic light emitting diode display device capable of achieving a considerable reduction in power consumption by generating a drive signal only for a period, in which the drive signal is actually required, is disclosed. The organic light emitting diode display device includes a DC-DC converter including a switching element to generate a drive signal by controlling an input voltage under a control of a logic, and a driver to supply, to pixels, the drive signal generated from the DC-DC converter in accordance with a timing. The logic includes an AND circuit to AND a control signal for drive signal generation and an output control signal maintained at a logic-high voltage only for a period in which the drive signal is to be supplied, and to supply a result of the ANDing operation.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: February 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hye-Min Park, Kyoung-Don Woo, Hyun Lee, Sang-Woo Seo
  • Patent number: 8344974
    Abstract: An OLED device is disclosed. The OLED device disposes a voltage divider and a switch unit in the output stage of a power supplier, thereby lowering the level of a supply voltage VDD, which is applied to a driver IC in an emission interval, below that of the supply voltage which is applied to the driver IC in a non-emission interval. Accordingly, the OLED device can reduce electric power consumption.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: January 1, 2013
    Assignee: LG Display Co. Ltd.
    Inventors: Hak Su Kim, Kyoung Don Woo, Young Jun Hong
  • Patent number: 8149231
    Abstract: The present invention relates to an apparatus for supplying power source for providing certain voltage to a first display device and a second display device. The apparatus for supplying power source includes a boosting circuit, a boosted voltage detecting circuit and an output selecting circuit. The boosting circuit boosts a battery voltage. The boosted voltage detecting circuit detects the boosted battery voltage, and transmits the detection result to the boosting circuit. The output selecting circuit is coupled to the boosting circuit and the boosted voltage detecting circuit, and provides selectively the boosted battery voltage to a first display device and a second display device. The apparatus provides certain voltage to a first display device and/or a second display device, and thus the size of a dual panel apparatus employing the display devices may be reduced.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: April 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Kyoung Don Woo, Hak Su Kim
  • Publication number: 20110037756
    Abstract: The present invention relates to an apparatus for supplying power source for providing certain voltage to a first display device and a second display device. The apparatus for supplying power source includes a boosting circuit, a boosted voltage detecting circuit and an output selecting circuit. The boosting circuit boosts a battery voltage. The boosted voltage detecting circuit detects the boosted battery voltage, and transmits the detection result to the boosting circuit. The output selecting circuit is coupled to the boosting circuit and the boosted voltage detecting circuit, and provides selectively the boosted battery voltage to a first display device and a second display device. The apparatus provides certain voltage to a first display device and/or a second display device, and thus the size of a dual panel apparatus employing the display devices may be reduced.
    Type: Application
    Filed: September 10, 2010
    Publication date: February 17, 2011
    Inventors: Kyoung Don Woo, Hak Su Kim
  • Patent number: 7889190
    Abstract: The present invention relates to an apparatus for supplying power source for providing power source to a plurality of display devices. The apparatus for supplying power source includes a boosting circuit and a voltage adjusting circuit. The boosting circuit boosts a battery voltage to a first voltage, and supplies the first voltage to a first display device. The voltage adjusting circuit adjusts the first voltage to a second voltage, and supplies the second voltage to a second display device. The apparatus supplies a voltage outputted from a boosting circuit to a first display device, downs the voltage through a voltage adjusting circuit, and then supplies the downed voltage to a second display device. In other words, the apparatus of the present invention may provide voltages having different magnitude to a plurality of display devices, respectively.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: February 15, 2011
    Assignee: LG Display Co., Ltd.
    Inventor: Kyoung Don Woo