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: 9726952
    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: Grant
    Filed: December 28, 2015
    Date of Patent: August 8, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-Soo Yoon, Joon-Chul Goh, Sang-Uk Lim, Chongchul Chai
  • Patent number: 9709439
    Abstract: A light sensitive circuit includes a light sensing capacitor and a driving transistor. The light sensing capacitor is configured to sense light of a predetermined one or more wavelengths. The driving transistor includes a gate electrode electrically connected to the light sensing capacitor and is configured to generate a light sensing current according to a voltage of the gate electrode in the driving transistor. A light sensing accuracy and a light sensing signal to noise ratio (SNR) of the display apparatus including a plurality of such light sensing capacitors may be improved relative to ones that do not include such light sensing capacitors.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: July 18, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Chul Goh, Jae-Keun Lim
  • Patent number: 9665739
    Abstract: Display device includes timing controller, display panel, data driver, and scan driver. The timing controller includes an authentication processing unit configured to generate an authentication result based on an authentication control signal. The timing controller converts an input image data signal to data driver control signal and scan driver control signal when the authentication result represents success. The timing controller deactivates the data driver control signal and the scan driver control signal when the authentication result represents fail. The display panel includes plurality of pixels. The data driver generates plurality of data signals based on the data driver control signal and provides the data signals to the pixels through plurality of data signal lines. The scan driver generates plurality of scan signals based on the scan driver control signal and provides the scan signals to the pixels through plurality of scan signals lines.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: May 30, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yun-Ki Baek, Ho-Seok Son, Joon-Chul Goh, Mun-San Park
  • Publication number: 20170148412
    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: Application
    Filed: February 7, 2017
    Publication date: May 25, 2017
    Inventors: Jung-Won Kim, Joon-Chul Goh, Hong-Soo Kim
  • Publication number: 20170124985
    Abstract: A display device includes: a display panel including first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages; a backlight source to provide light to the display panel; a signal controller to divide horizontal image signals into first group image signals and second group image signals, to extract a first maximum grayscale image signal from the first group image signals, and to extract a second maximum grayscale image signal from the second group image signals; a power supply to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first maximum grayscale image signal and a grayscale level of the second maximum grayscale image signal.
    Type: Application
    Filed: August 19, 2016
    Publication date: May 4, 2017
    Inventors: Jung-taek Kim, Kyoungwon Lee, Joon-chul Goh, Youngwoo Choi
  • Publication number: 20170108973
    Abstract: There are provided a touch sensor and a liquid crystal display including the same. A touch sensor includes a plurality of driving electrodes, a plurality of sensing electrodes intersecting the driving electrodes, a plurality of piezoelectric materials disposed between the driving electrodes and the sensing electrodes at intersection points of the driving electrodes and the sensing electrodes, and a touch controller for detecting a touch position and a touch pressure by using sensing signals output from the sensing electrodes.
    Type: Application
    Filed: May 24, 2016
    Publication date: April 20, 2017
    Inventors: Sang Mi KIM, Joon Chul GOH, Kyoung Ho LIM
  • 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