Patents by Inventor Joon-Chul Goh

Joon-Chul Goh 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).

  • PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME
    Publication number: 20160322446
    Abstract: There is provided a pixel including an organic light emitting diode (OLED), a first transistor having a first electrode connected to a first power source and configured to control an amount of current supplied from the first power source to the OLED in response to a data signal, a second transistor and a third transistor connected between a second electrode and a gate electrode of the first transistor, and a fourth transistor connected between an initializing power source and a first node that is a common node of the second transistor and the third transistor.
    Type: Application
    Filed: January 14, 2016
    Publication date: November 3, 2016
    Inventors: Su Hyeong PARK, Joon Chul GOH, Bong Hyun YOU, Jun Woo HONG
  • Pixel, display device having the same, and thin film transistor (TFT) substrate for display device
    Patent number: 9478169
    Abstract: A pixel, a display device having the same, and a thin film transistor (TFT) substrate for the display device are disclosed. In one aspect, the pixel includes an emitter configured to emit light based at least in part on a driving current. The pixel also includes a driving transistor including an active layer, a first electrode electrically connected to a first end portion of the active layer, a second electrode electrically connected to a second end portion of the active layer, a first gate electrode configured to receive a data voltage from a data driver so as to form a channel in the active layer, and a second gate electrode configured to receive a bias voltage from a voltage source, wherein the channel is configured to adjust the driving current.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: October 25, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Keun Lim, Chong-Chul Chai, Joon-Chul Goh, Mu-Kyung Jeon
  • Display device and driving method thereof
    Patent number: 9466261
    Abstract: A display device includes a memory which stores gamma data for gamma curves including a first gamma curve and a second gamma curve; a gray voltage generator which generates gray voltages based on the gamma data; a data driver which receives an input image signal from a signal controller and converts the input image signal into a data voltage using the gray voltages; and a display panel including pixels which receives the data voltage and may display an image, where the pixel displays images corresponding to the input image signal during one frame set, one frame set includes consecutive frames, the images displayed by a pixel includes first and second images displayed based on the first and second gamma curves, respectively, a luminance of the first image is not less than a luminance of the second image, and the second image is displayed in two consecutive frames.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 11, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Bong Hyun You, Joon-Chul Goh, Uk Chul Choi, Jung-Won Kim, Nam-Gon Choi, Dong-Won Park
  • Display device and driving circuit thereof for improving the accuracy of gamma tuning
    Patent number: 9460681
    Abstract: A display device and a driving circuit thereof are disclosed. In one aspect, the display device includes a display panel, a gamma reference voltage generator, a data driver and a driving controller. The display panel includes a plurality of pixels, each pixel including first and second sub-pixels. The gamma reference voltage generator generates one or more first gamma reference voltages each having a high gamma value greater than a reference gamma value, and one or more second gamma reference voltages each having a low gamma value less than the reference gamma value. The data driver generates a data voltage based at least in part on one or more of the first and second gamma reference voltages, and provides the data voltage to the first and second sub-pixels. The driving controller determines a gamma value and a data voltage output pattern according to a driving method of the display panel.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: October 4, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Sik Hwang, Joon-Chul Goh, Won-Sik Oh
  • DISPLAY APPARATUS HAVING A REDUCED-WIDTH BEZEL AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20160266426
    Abstract: A display apparatus includes a display panel and a display panel driver. The display panel includes a lower substrate and an upper substrate facing the lower substrate. The lower substrate includes a first base substrate and a flexible substrate. The flexible substrate has an area larger than an area of the first base substrate. The display panel driver includes a gate driver configured to apply a gate signal to a gate line of the display panel and a data driver configured to apply a data voltage to a data line of the display panel.
    Type: Application
    Filed: November 20, 2015
    Publication date: September 15, 2016
    Inventors: A-RAM SONG, JOON-CHUL GOH, SOO-YEON LEE
  • Display device displaying substantially constant luminance and driving method thereof
    Patent number: 9443465
    Abstract: A display device includes: a first switching element which transmits a first data voltage; a second switching element which transmits a second data voltage; a driving transistor connected to the first switching element and the second switching element, where the driving transistor is driven based on the first data voltage and the second data voltage; and an organic light emitting diode connected to the driving transistor, where the organic light emitting diode emits light based on an output of the driving transistor, and a driving method thereof.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: September 13, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyoung Cho, Joon-Chul Goh, Jong-Hee Kim, Cheol-Gon Lee, Jae Keun Lim, Ho Yong Jung, Chong Chul Chai
  • Display device and processing method of image signal thereof
    Patent number: 9430973
    Abstract: A image signal processing method of a liquid crystal display according to an exemplary embodiment of the present invention includes: receiving a previous image signal and a current image signal as two sequential input image signals; performing a first correction (DCC) and a doubling for the current image signal to generate a correction image signal comprising a plurality of doubled frames for the current image signal; and post-processing the portion of the plurality of doubled frames to generate a final correction image signal.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: August 30, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Nam-Gon Choi, Yong Jun Jang, Jung-Won Kim, Geun Jeong Park, Ji-Woong Jeong, Uk Chul Choi, Joon-Chul Goh, Cheol Woo Park, Bong Hyun You
  • DISPLAY APPARATUS HAVING GATE DRIVING CIRCUIT
    Publication number: 20160225307
    Abstract: A display apparatus includes: a display panel including a plurality of pixels respectively connected to a plurality of gate lines; a gate driving circuit including a plurality of driving stages configured to apply gate signals to the gate lines; a voltage generator configured to output a gate-on voltage through a voltage output terminal thereof; and a signal controller configured to sense a variation in current of the voltage output terminal to output a back bias control voltage corresponding to the sensed current variation, wherein each of the driving stages comprises a plurality of oxide thin film transistors and at least one of the oxide thin film transistors is a four-terminal transistor in which a threshold voltage thereof is controlled by the back bias control voltage.
    Type: Application
    Filed: December 21, 2015
    Publication date: August 4, 2016
    Inventors: Soo-wan Yoon, Joon-chul Goh, Young-Soo Yoon, Bonghyun You
  • ELECTROLUMINESCENT DISPLAY AND METHOD OF DRIVING THE SAME
    Publication number: 20160217729
    Abstract: An electroluminescent display and a method of driving the same are disclosed. In one aspect, the display includes a display panel including a plurality of pixel units electrically connected to a plurality of data lines and a plurality of gate lines. The pixel units are arranged in a matrix of a plurality of rows and a plurality of columns, the pixel units in the same column are connected to the same data line, and the pixel units in the same diagonal line of the matrix are connected to the same gate line. The display also includes a data driver located at a first side of the display panel, the data driver being configured to drive the data lines, and a gate driver located at the first side of the display panel and configured to drive the gate lines.
    Type: Application
    Filed: June 30, 2015
    Publication date: July 28, 2016
    Inventors: Jung-Taek Kim, Joon-Chul Goh, Soo-Yeon Lee, Kyoung-Ho Lim, Young-Woo Choi
  • DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME
    Publication number: 20160216839
    Abstract: A display device includes: a processor configured to receive first image data for a display panel from an external system, determine a touch path based on a touch event generated by a touch sensor panel, and output second image data obtained by using the touch path to add overlay data to the first image data; and a control signal generating unit configured to generate a control signal for controlling an operation timing of a gate driver and a data driver, and operate in an interlace mode when the second image data is output to the display panel.
    Type: Application
    Filed: September 22, 2015
    Publication date: July 28, 2016
    Inventors: Su Hyeong PARK, Ho Yong JUNG, Jun-Woo HONG, Joon-Chul GOH, Mun-San PARK, Ho Seok SON
  • Liquid crystal display and driving method thereof
    Patent number: 9378695
    Abstract: A liquid crystal display includes a signal controller to generate a plurality of start pulse signals based on a plurality of eye blinking signals during a predetermined mode of operation. The start pulse signals are generated in a manner different from a vertical synchronization signal. The start signals may be generated to have an irregular spacing which corresponds to the blinking signals, which may be different from a constant spacing used during display of moving images. The predetermined mode may be a still image mode.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: June 28, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ah-Reum Kim, Ja Kyoung Jin, Joon-Chul Goh, Gi Geun Kim, Yun Ki Baek
  • ELECTROLUMINESCENT DISPLAY AND METHOD OF DRIVING THE SAME
    Publication number: 20160180763
    Abstract: An electroluminescent display and a method of driving the same are disclosed. In one aspect, the display includes a display panel including a plurality of pixels configured to operate based on a first power supply voltage having a negative voltage level. The display panel is configured to generate at least one feedback voltage corresponding to an ohmic drop of the first power supply voltage. An analog-to-digital converter is configured to generate at least one digital feedback signal based on the at least one feedback voltage. An adaptive voltage controller is configured to generate a voltage control signal based on input image data, the at least one digital feedback signal, a distribution of the input image data and the ohmic drop of the first power supply voltage. A voltage converter is configured to generate the first power supply voltage based on an input voltage and the voltage control signal.
    Type: Application
    Filed: April 29, 2015
    Publication date: June 23, 2016
    Inventors: Su-Hyeong Park, Ji-Myoung Seo, Hee-Soon Jeong, Soo-Wan Yoon, Ji-Woong Jeong, Jun-Woo Hong, Joon-Chul Goh
  • METHOD OF DRIVING DISPLAY DEVICE
    Publication number: 20160173866
    Abstract: A method of driving a display device includes displaying an image corresponding to a left eye image signal during a first frame set including one or more frames and displaying an image corresponding to a right eye image signal during a second frame set including one or more successive frames, in which the first frame set and the second frame set include at least one frame displaying a first image according to a first gamma curve and at least one frame displaying a second image according to a second gamma curve, and the first frame set and the second frame set include two successive frames displaying the second image.
    Type: Application
    Filed: January 4, 2016
    Publication date: June 16, 2016
    Inventors: Jung-Won KIM, Joon-Chul GOH, Bong Hyun YOU, Uk Chul CHOI
  • Display device and driving method thereof for improving side visibility
    Patent number: 9368055
    Abstract: A display device includes: a similar gray level block detector configured to detect a pixel data block in which a gray level difference between a plurality of pixel data included in an image signal is smaller than or equal to a threshold; a skin tone detector configured to detect the pixel data block including a skin tone; and a gamma processor configured to apply a first gamma to a plurality of pixel data included in the pixel data block when the pixel data block does not include the skin tone and apply a second gamma to the plurality of pixel data included in the pixel data block when the pixel data block includes the skin tone.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: June 14, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Nam-Gon Choi, Joon-Chul Goh, Gi Geun Kim, Yun Ki Baek, Yong Jun Jang, Ah Reum Kim, Geun Jeong Park, Cheol Woo Park, Jeong-Hun So, Dong Gyu Lee
  • Touch substrate and display apparatus having the same
    Patent number: 9342166
    Abstract: In a touch substrate and a display apparatus, the touch substrate includes a first electrode, a second electrode, a first touch electrode and a blocking layer. The first electrode includes an opaque conductive material and extends along a first direction. The second electrode includes the opaque conductive material, extends along a second direction crossing the first direction, and has a gap through which the first electrode extends. The first touch electrode is formed on the first electrode and is electrically connected to the first electrode. The blocking layer overlaps the first and second electrodes.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: May 17, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Young-Joon Cho, Joon-Chul Goh, Ji-Hong Park, Cheol-Gon Lee, Chong-Chul Chai, Jae-Keun Lim
  • DISPLAY APPARATUS
    Publication number: 20160133214
    Abstract: A display apparatus includes a plurality of pixels arranged in columns and rows in a display area, a data line extending in a first direction and connected with pixels of a k-th column (‘k’ is a natural number) and a (k+1)-th column, a gate line extending in a second direction crossing the first direction and connected with ones of the pixels, a gate signal line extending in the first direction and connected with the gate line, and a gate driver in a first peripheral area adjacent to a first longer side of the display area and having a first width, and configured to apply a gate signal to the gate line.
    Type: Application
    Filed: May 1, 2015
    Publication date: May 12, 2016
    Inventors: Ho-Kyoon Kwon, Myoung-Soo Kim, Sang-Ik Lee, Kyoung-Ho Lim, Kwang-Chul Jung, Jun-Ki Jeong, Ki-Seok Cha, Joon-Chul Goh, Bong-Hyun You
  • Display device and method for driving the same
    Patent number: 9330623
    Abstract: A display device including a display panel which includes pixels connected to gate lines and data lines; and an image display control unit controlling an input image signal to be converted into a data signal and, thereby, display an image on the display panel. The image display control unit outputs the data signal so that a position of an image being displayed on the display panel is changed when the image signal is the same for a preselected time period and sets a next position change time period of the image according to a distance between an original position of the image and a changed position of the image.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: May 3, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Donggyu Lee, Joon-Chul Goh, Nam-Gon Choi, Jung-Won Kim, HongSoo Kim, Geunjeong Park
  • DISPLAY DEVICE
    Publication number: 20160117965
    Abstract: A display device includes a display panel including sub-pixels, a first driver adjacent to a first side of the display panel to generate first signals, and a second driver adjacent to the first side to generate second signals. The display panel includes vertical lines including one ends disposed at the first side to apply the first signals to the sub-pixels, diagonal lines crossing the vertical lines to apply the second signals to the sub-pixels, and crossing lines crossing the vertical and diagonal lines. The diagonal lines include first diagonal lines including one ends at the first side and second diagonal lines including one ends at a second side adjacent to the first side. The crossing lines include one ends at the first side and the other ends at the second side. The crossing lines receive the second signals and apply the second signals to the second diagonal lines.
    Type: Application
    Filed: June 15, 2015
    Publication date: April 28, 2016
    Inventors: Sooyeon LEE, Joon-Chul GOH, Jung-Taek KIM, Aram SONG, KyoungHo LIM
  • LIQUID CRYSTAL DISPLAY
    Publication number: 20160116785
    Abstract: A liquid crystal display includes first and second sub-pixels charged with the same voltage during a first period. The voltage charged in the second sub-pixel is decreased after the first period. Since the voltage level of the first sub-pixel is different from the voltage level of the second sub-pixel after the first period, liquid crystal molecules disposed corresponding to the first sub-pixel are aligned in a direction different from that of liquid crystal molecules disposed corresponding to the second sub-pixel. Thus, a side viewing angle of the liquid crystal display is improved.
    Type: Application
    Filed: December 28, 2015
    Publication date: April 28, 2016
    Inventors: Young-Soo YOON, Joon-Chul GOH, Sang-Uk LIM, Chongchul CHAI
  • PIXEL, DISPLAY DEVICE HAVING THE SAME, AND THIN FILM TRANSISTOR (TFT) SUBSTRATE FOR DISPLAY DEVICE
    Publication number: 20160104424
    Abstract: A pixel, a display device having the same, and a thin film transistor (TFT) substrate for the display device are disclosed. In one aspect, the pixel includes an emitter configured to emit light based at least in part on a driving current. The pixel also includes a driving transistor including an active layer, a first electrode electrically connected to a first end portion of the active layer, a second electrode electrically connected to a second end portion of the active layer, a first gate electrode configured to receive a data voltage from a data driver so as to form a channel in the active layer, and a second gate electrode configured to receive a bias voltage from a voltage source, wherein the channel is configured to adjust the driving current.
    Type: Application
    Filed: March 19, 2015
    Publication date: April 14, 2016
    Inventors: Jae-Keun Lim, Chong-Chul Chai, Joon-Chul Goh, Mu-Kyung Jeon