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).

  • Patent number: 9626912
    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: Grant
    Filed: June 30, 2015
    Date of Patent: April 18, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung-Taek Kim, Joon-Chul Goh, Soo-Yeon Lee, Kyoung-Ho Lim, Young-Woo Choi
  • Patent number: 9615003
    Abstract: Gamma applied data generating circuit includes motion vector extractor, gamma pattern generator, first gamma applier, second gamma applier, and output converter. Motion vector extractor extracts motion vector of object. Gamma pattern generator generates first gamma pattern corresponding to first motion vector value and second gamma pattern corresponding to second motion vector value from first time point. Value of motion vector is changed from first motion vector value to second motion vector value at first time point. First and second gamma appliers generate first and second data by applying first and second gamma pattern to input data, respectively. Output converter outputs sum of first data times first weight and second data times second weight as gamma applied data. From first time point to second time point, output converter converts first weight from 1 to 0 and converts second weight from 0 to 1.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: April 4, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Gyu Lee, Joon-Chul Goh, Nam-Gon Choi, Cheol-Woo Park, Bong-Hyun You
  • Publication number: 20170091583
    Abstract: An apparatus for detecting an afterimage candidate region includes: a comparison unit which compares gradation data of an n-th frame with integrated gradation data of an (n?1)-th frame and generates integrated gradation data of the n-th frame, where n is a natural number; a memory which provides the integrated gradation data of the (n?1)-th frame to the comparison unit and stores the integrated gradation data of the n-th frame; and an afterimage candidate region detection unit which detects an afterimage candidate region based on the integrated gradation data of the n-th frame, where each of the integrated gradation data of the n-th frame and the integrated gradation data of the (n?1)-th frame comprises a comparison region and a gradation region.
    Type: Application
    Filed: December 13, 2016
    Publication date: March 30, 2017
    Inventors: Yong Jun JANG, Nam Gon CHOI, Joon Chul GOH, Gi Geun KIM, Geun Jeong PARK, Cheol Woo PARK, Yun Ki BAEK, Jeong Hun SO, Dong Gyu LEE
  • Patent number: 9607581
    Abstract: Provided is a display device including: a display panel, a timing controller, a gate driver, and a data driver. The display panel includes a display area configured to display an image and a non-display area adjacent to one side of the display area. The display area includes oblique lines, intersectional lines crossing and isolated from at least a part of the oblique lines, and pixels. Pixels coupled to the oblique lines or the intersectional lines and arranged along a line in one direction are defined into pixel rows. The display area further includes a plurality of areas divided by the pixel rows being successive. The number of pixels constituting one of adjacent ones of the pixel rows in at least one of the plurality of areas is different from the number of pixels constituting another thereof.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: March 28, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Won Park, Joon-Chul Goh, Bonghyun You, KyoungHo Lim, Sangjin Jeon, Junki Jeong
  • Publication number: 20170069274
    Abstract: A display apparatus includes a display panel for displaying an image and that includes a plurality of display areas, a light source part for providing a light to the display panel, a luminance measurer for measuring a luminance of each display area of the display panel and outputting a panel luminance signal of each display area of the display panel, and a light source driver for driving the light source part based on the panel luminance signal to decrease the light source luminance signal of each display area of the display panel when the panel luminance signal of each display area of the display panel increases and to increase the light source luminance signal of each display area of the display panel when the panel luminance signal of each display area of the display panel decreases.
    Type: Application
    Filed: March 17, 2016
    Publication date: March 9, 2017
    Inventors: JIN-KYU PARK, JAI-HYUN KOH, JOON-CHUL GOH, SEOK-YUN SON, KUK-HWAN AHN
  • Patent number: 9589525
    Abstract: A method of driving a display panel is disclosed. In one aspect, the display panel includes a plurality of pixels arranged in odd and even rows and a plurality of odd and even gate lines respectively connected to the pixels of the corresponding odd and even rows. The method includes outputting odd gate signals to the odd numbered gate lines during two consecutive subframes and outputting even gate signals to the even numbered gate lines during two consecutive subframes. A frame is divided into two subframes.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 7, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung-Won Kim, Joon-Chul Goh, Hong-Soo Kim
  • Publication number: 20170061927
    Abstract: A display apparatus may include a display timing controller and a display panel. The display timing controller generates first output image data based on first input image data and a first gamma function, and generates second output image data based on second input image data and a second gamma function. The display panel operates based on the first output image data during a first duration, and operates based on the second output image data during a second duration subsequent to the first duration. The first and second gamma functions correspond to a first region of the display panel, and a luminance of an image based on the first gamma function is different from a luminance of an image based on the second gamma function.
    Type: Application
    Filed: May 16, 2016
    Publication date: March 2, 2017
    Inventors: YOUNG-SOO YOON, JOON-CHUL GOH, SANG-IK LEE
  • Patent number: 9576538
    Abstract: A display apparatus includes: a panel including a plurality of pixels configured to display an image; an ambient light sensor configured to sense an illumination level of ambient light and to generate ambient light data; a gamma controller configured to control sections of a reference gamma curve based on the ambient light data to generate a controlled gamma curve, the controlled gamma curve defining output data according to input data; a data driver configured to convert an image signal into a data voltage based on the controlled gamma curve and to supply the data voltage to the pixels; and a gate driver configured to supply a gate signal to the pixels.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: February 21, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yun-Ki Baek, Jung-Taek Kim, Yong-Jun Jang, Nam-Gon Choi, Joon-Chul Goh, Ah-Reum Kim
  • Publication number: 20170047028
    Abstract: A display apparatus includes a mode determiner configured to compare image signals of a previous frame and a current frame and to determine an image mode of the current frame, a sync signal generator configured to generate a panel sync signal with a low frequency corresponding to the image mode using an original sync signal with a normal frequency, the low frequency being a non-divisor frequency of the normal frequency and lower than the normal frequency, a data driver configured to drive a data line of a display panel using a data sync signal based on the panel sync signal with the low frequency, and a gate driver configured to drive a gate line of the display panel using a gate sync signal based on the panel sync signal with the low frequency.
    Type: Application
    Filed: March 3, 2016
    Publication date: February 16, 2017
    Inventors: JI-MYOUNG SEO, DONG-WON PARK, JAE-WAN PARK, SANG-Ml KIM, YONG-DOO PARK, KYOUNG-WON LEE, JOON-CHUL GOH, BONGHYUN YOU
  • Patent number: 9570022
    Abstract: A liquid crystal display device includes a liquid crystal panel of a normally black type which receives a plurality of scan signals and a common voltage having a voltage level which periodically varies, and a backlight unit which provides backlight to the liquid crystal panel, where the plurality of scan signals sequentially has a scan-on voltage along a first direction, and the backlight has a luminance which is increased or decreased along the first direction.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: February 14, 2017
    Assignee: SAMSUNG DISPLAY CO. LTD.
    Inventors: Young Soo Yoon, Joon Chul Goh, Jung Taek Kim, Kyoung Ho Lim, Dae Gwang Jang
  • Patent number: 9552534
    Abstract: An apparatus for detecting an afterimage candidate region includes: a comparison unit which compares gradation data of an n-th frame with integrated gradation data of an (n?1)-th frame and generates integrated gradation data of the n-th frame, where n is a natural number; a memory which provides the integrated gradation data of the (n?1)-th frame to the comparison unit and stores the integrated gradation data of the n-th frame; and an afterimage candidate region detection unit which detects an afterimage candidate region based on the integrated gradation data of the n-th frame, where each of the integrated gradation data of the n-th frame and the integrated gradation data of the (n?1)-th frame comprises a comparison region and a gradation region.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: January 24, 2017
    Assignee: SAMSUNG DISPLAY CO. LTD.
    Inventors: Yong Jun Jang, Nam Gon Choi, Joon Chul Goh, Gi Geun Kim, Geun Jeong Park, Cheol Woo Park, Yun Ki Baek, Jeong Hun So, Dong Gyu Lee
  • Patent number: 9542877
    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: Grant
    Filed: April 29, 2015
    Date of Patent: January 10, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Su-Hyeong Park, Ji-Myoung Seo, Hee-Soon Jeong, Soo-Wan Yoon, Ji-Woong Jeong, Jun-Woo Hong, Joon-Chul Goh
  • Patent number: 9530350
    Abstract: A display panel includes a gate line extending in a column direction, a data line extending in a row direction, a pixel including a switching transistor connected to the gate line and the data line, and a voltage applier connected to a gate line of a present stage. The voltage applier to apply a voltage after conversion of the gate-on voltage to a gate-off voltage has started. The voltage is closer to the gate-on voltage than the gate-off voltage.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: December 27, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se Hyoung Cho, Joon-Chul Goh, Jang Mi Kang, Sung Hwan Kim, Il Gon Kim, Sang Hyeon Song, Mee Hye Jung
  • Publication number: 20160372076
    Abstract: A display apparatus includes gate lines extending in a first direction, data lines extending in a second direction crossing the first direction, first color pixels, and second color pixels. A first color pixel arranged in an f-th column between an f-th data line and an (f+1)th data line is connected to one of the f-th data line and the (f+1)th data line. A first color pixel arranged in a g-th column between a g-th data line and a (g+1)th data line is connected to one of a (g?1)th data line and a (g+2)th data line. First color pixels in a first color pixel diagonal group receive data voltages having a same polarity. Second color pixels in a second color pixel diagonal group receive data voltages having a same polarity.
    Type: Application
    Filed: March 8, 2016
    Publication date: December 22, 2016
    Inventors: Jai-hyun KOH, Jin-kyu PARK, Seokyun SON, Kuk-hwan AHN, Joon-chul GOH, Bonghyun YOU
  • Publication number: 20160351103
    Abstract: A display apparatus includes a display panel and a timing controller. The timing controller generates first output image data based on input image data and sets a driving frequency of the display panel as a first frequency in a first operation mode. The timing controller converts the input image data into second output image data and sets the driving frequency of the display panel as a second frequency lower than the first frequency in a second operation mode. The display panel displays a first image based on the first frequency and the first output image data in the first operation mode. The first image is represented by X grayscales. The display panel displays a second image based on the second frequency and the second output image data in the second operation mode. The second image is represented by Y grayscales, where Y is less than X.
    Type: Application
    Filed: January 12, 2016
    Publication date: December 1, 2016
    Inventors: MUN-SAN PARK, JOON-CHUL GOH, WOO-MI BAE, KYOUNG-WON LEE
  • Patent number: 9489909
    Abstract: A method of driving a display panel includes detecting a position of a viewer to output a viewer position detection signal, determining whether the position of the viewer is in a first area or in a second area based on the viewer position detection signal to output a viewer position signal, and driving a unit pixel of the display panel using a plurality of gamma values according to the viewer position signal. The first area is less than a reference distance, and the second area is not less than the reference distance. Thus, side visibility of a display apparatus may be improved.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: November 8, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seok-Ha Hong, Joon-Chul Goh, Bong-Hyun You, Dae-Gwang Jang
  • 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
  • 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
  • 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
  • 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