Patents by Inventor Hyun-Ho Cho

Hyun-Ho Cho 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: 11222600
    Abstract: Disclosed are a source driver capable of achieving high speed and high resolution and a display driving circuit including the same. The source driver may include: a first channel group and a second channel group configured to output source driving signals; a first gradation voltage divider configured to generate first gradation voltages using gamma reference voltages and provide the first gradation voltages to the first channel group; and a second gradation voltage divider configured to generate second gradation voltages having the same level as the first gradation voltages using the gamma reference voltages, and provide the second gradation voltages to the second channel group. The first and second gradation voltage dividers are connected to a gamma reference voltage generator configured to provide the gamma reference voltages, and receive the gamma reference voltages having the same voltage range from the gamma reference voltage generator.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: January 11, 2022
    Assignee: Silicon Works Co., Ltd.
    Inventors: Hae Won Lee, Hyun Ho Cho, Jung Bae Yun, Ju Young Shin
  • Publication number: 20200105207
    Abstract: Disclosed are a source driver capable of achieving high speed and high resolution and a display driving circuit including the same. The source driver may include: a first channel group and a second channel group configured to output source driving signals; a first gradation voltage divider configured to generate first gradation voltages using gamma reference voltages and provide the first gradation voltages to the first channel group; and a second gradation voltage divider configured to generate second gradation voltages having the same level as the first gradation voltages using the gamma reference voltages, and provide the second gradation voltages to the second channel group. The first and second gradation voltage dividers are connected to a gamma reference voltage generator configured to provide the gamma reference voltages, and receive the gamma reference voltages having the same voltage range from the gamma reference voltage generator.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 2, 2020
    Inventors: Hae Won Lee, Hyun Ho Cho, Jung Bae Yun, Ju Young Shin
  • Patent number: 10600349
    Abstract: The present invention relates to a display apparatus which drives a display panel to display an image, and a driving circuit thereof. The display apparatus includes a timing controller configured to provide a control option having a value for compensating for pixel data and a gray scale, and a driving circuit configured to combines the control option and the pixel data and output an output voltage.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: March 24, 2020
    Assignee: Silicon Works Co., Ltd.
    Inventors: Hyun Ho Cho, Yong Ik Jung
  • Patent number: 9768046
    Abstract: A wafer storage container includes a shell body including a first side body and a second side body that face, an upper body connected with upper parts of the first side body and the second side body, a rear body connected with an end of one side of each of the first side body and the second side body, and a lower body connected with lower parts of the first side body and the second side body, and configured to define an internal space together with the first side body, the second side body, the upper body, and the rear body.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: September 19, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Ho Cho, Hyeog-Ki Kim, Jung-Hun Nam
  • Publication number: 20170186637
    Abstract: A wafer container includes a base, a guide, a cover, a locking member and a sealing member. The base includes an installing surface thereon. The guide is disposed on the installing surface of the base. The guide is configured to confine a plurality of wafers horizontally stacked upon the installing surface of the base. The cover is configured to cover the installing surface. The locking member is configured to lock the cover to the base. The sealing member is configured to create an air-tight seal between the locking member and the guide.
    Type: Application
    Filed: September 9, 2016
    Publication date: June 29, 2017
    Inventors: HYUN-HO CHO, DONG-YEON KIM, HYEOG-KI KIM, JUNG-HUN NAM, JIN-HO KIM
  • Publication number: 20170098404
    Abstract: Provided is a display driving circuit capable of achieving high speed and high resolution by improving an output slew rate. The display driving circuit may include: a gradation voltage generation unit including a plurality of resistor strings corresponding to a plurality of groups into which channels corresponding to display data are grouped, the plurality of resistor strings being configured to provide gradation voltages to digital-analog converters (DACs) corresponding to the respective channels of the corresponding groups; and a display driving unit including the DACs and buffers corresponding to the respective channels, wherein the DACs convert the corresponding display data into data voltages using the gradation voltages, and the buffers provide the corresponding data voltages as source driving signals to a display panel.
    Type: Application
    Filed: September 27, 2016
    Publication date: April 6, 2017
    Applicant: SILICON WORKS CO., LTD.
    Inventors: Hae Won LEE, Hyun Ho CHO, Jung Bae YUN, Ju Young SHIN
  • Patent number: 9530356
    Abstract: A source driver may include: a transmission line configured to transmit an output signal of a sample and hold circuit which stores pixel information of an organic light emitting diode (OLED) cell; an amplifier is formed a first offset voltage at an input terminal by a parasitic capacitor of the transmission line; and an offset voltage storage unit configured to store the first offset voltage outputted from the amplifier as a second offset voltage while the transmission of the output signal of the sample and hold circuit through the transmission line is turned off, and offset the first offset voltage by providing the second offset voltage to the input terminal of the amplifier when the output signal of the sample and hold circuit is transmitted through the transmission line.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: December 27, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Kyung Jik Min, Hyun Kyu Jeon, Yong Ik Jung, Hyun Ho Cho, Young Bok Kim
  • Publication number: 20160335942
    Abstract: The present invention relates to a display apparatus which drives a display panel to display an image, and a driving circuit thereof. The display apparatus includes a timing controller configured to provide a control option having a value for compensating for pixel data and a gray scale, and a driving circuit configured to combines the control option and the pixel data and output an output voltage.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 17, 2016
    Applicant: SILICON WORKS CO., LTD.
    Inventors: Hyun Ho CHO, Yong Ik JUNG
  • Patent number: 9412308
    Abstract: A sample and hold circuit may include: a main sample and hold circuit configured to sample and hold pixel information of an organic light emitting diode (OLED) cell, and output a first output signal; and a dummy sample and hold circuit configured to sample and hold a reference voltage in synchronization with the main sample and hold circuit, and output a second output signal for offsetting a switching noise signal contained in the first output signal.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: August 9, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Kyung Jik Min, Hyun Kyu Jeon, Yong Ik Jung, Hyun Ho Cho, Young Bok Kim
  • Patent number: 9311858
    Abstract: A circuit for driving an organic light emitting diode display includes a display panel that displays an image by using organic light emitting diodes disposed at intersection areas of a plurality of gate lines and a plurality of data lines; a threshold voltage detection control unit that supplies a precharge voltage by sequentially turning on transistors for threshold voltage detection, which are connected among the data lines and the organic light emitting diodes on the display panel, in units of horizontal lines, and enables threshold voltages to be detected; and a source driver that detects threshold voltages of all organic light emitting diodes arranged on a corresponding horizontal line, and repeats an operation, as necessary, for sampling/holding the detected threshold voltages through M sample/hold circuits, converting the sampled/held threshold voltages into digital signals, and storing the digital signals in a memory.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 12, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Hyun Ho Cho, Yong Icc Jung, Young Bok Kim, Joon Ho Na, Dae Seong Kim, Dae Keun Han
  • Publication number: 20160078835
    Abstract: A display driving circuit may include: an output buffer unit including a plurality of output buffer pairs, wherein among the plurality of output buffer pairs, each of first output buffers has a first voltage driving potential, and each of second output buffers has a second voltage driving potential; an output switch unit configured to directly connect the plurality of output buffer pairs to a plurality of output line pairs or cross and connect the plurality of output buffer pairs to the plurality of output line pairs; and a charge sharing switch unit configured to connect first output lines corresponding to the first output buffers, and connect second output lines corresponding to the second output buffers. Through this configuration, the display driving circuit can reduce power consumption and heat generation.
    Type: Application
    Filed: April 22, 2014
    Publication date: March 17, 2016
    Inventors: Hyun Ho CHO, Joon Ho NA, Hyun Kyu JEON, Yong Ik JUNG
  • Patent number: 9237351
    Abstract: An encoding/decoding apparatus and method for parallel correction of in-loop pixels based on complexity using a video parameter may include a complexity measuring unit to measure a complexity of an in-loop pixel correction process, using video codec parameter information, in a video codec, and a core allocating unit to evenly distribute jobs associated with the in-loop pixel correction process, using the measured complexity.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: January 12, 2016
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATIVE FOUNDATION
    Inventors: Doo Hyun Kim, Dong Gyu Sim, Joon Ho Song, Do Hyung Kim, Eun Kyung Ryu, Shi Hwa Lee, Hyun Ho Cho, Jung Han Seo
  • Publication number: 20150311098
    Abstract: A wafer storage container includes a shell body including a first side body and a second side body that face, an upper body connected with upper parts of the first side body and the second side body, a rear body connected with an end of one side of each of the first side body and the second side body, and a lower body connected with lower parts of the first side body and the second side body, and configured to define an internal space together with the first side body, the second side body, the upper body, and the rear body.
    Type: Application
    Filed: November 13, 2014
    Publication date: October 29, 2015
    Inventors: Hyun-Ho CHO, Hyeog-Ki KIM, Jung-Hun NAM
  • Patent number: 9093244
    Abstract: A method for routing gamma voltages in a flat panel display that includes a plurality of source driver integrated circuits (SDICs) each having a plurality of gamma buffers. The method includes forming routing lines to route a plurality of gamma voltages; connecting the routing lines to output terminals of the gamma buffers; applying the reset gamma voltage to the gamma buffer of selected SDIC after selecting the SDIC in which the gamma voltage is required to be reset in consideration of heating values of the SDICs, and changing connection between a routing line corresponding to the selected gamma buffer and a tap point of a resistor string of the SDIC such that the connection corresponds to the reset gamma voltage.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: July 28, 2015
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Dae-Keun Han, Dae-Seong Kim, Joon-Ho Na, Hong-Hee Son, Hyun-Ho Cho, Hyung-Seog Oh
  • Patent number: 9030453
    Abstract: An LCD driving circuit includes a first buffer configured to have a terminal for a first voltage, a terminal for a second voltage and a terminal for an intermediate voltage between the first voltage and the second voltage, and be driven in a range from the first voltage to the intermediate voltage; and a second buffer configured to have a terminal for the first voltage, a terminal for the second voltage and a terminal for the intermediate voltage, and be driven in a range from the intermediate voltage to the second voltage. The terminal for the intermediate voltage of the first buffer and the terminal for the intermediate voltage of the second buffer are connected with each other, and the first voltage is a highest voltage, the second voltage is a lowest voltage, and the intermediate voltage is in a range from the first voltage to the second voltage.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: May 12, 2015
    Assignee: Silicon Works Co., Ltd.
    Inventors: Hyun Ho Cho, Young Icc Jung, Young Suk Son, Joon Ho Na, Hyung Seog Oh, Dae Seong Kim, Dae Keun Han
  • Patent number: 9014259
    Abstract: An apparatus and method sequentially parses bitstreams based on a removal of an Emulation Prevention Byte (EPB). The apparatus and method may detect an EPB pattern from among sequentially input bitstreams, may store the bitstreams, may store a processed bitstream where the EPB pattern is removed, among the bitstreams, and may select an output of a register buffer based on an input of a buffer selection flag.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: April 21, 2015
    Assignees: Samsung Electronics Co., Ltd., Kwangwoon University Industry-Academic Collaboration Foundation
    Inventors: Donggyu Sim, Doo Hyun Kim, Joon Ho Song, Shi Hwa Lee, Do Hyung Kim, Hyun Ho Cho, Jin Sub Lee, Jeong Han Seo
  • Publication number: 20150091888
    Abstract: A source driver may include: a transmission line configured to transmit an output signal of a sample and hold circuit which stores pixel information of an organic light emitting diode (OLED) cell; an amplifier is formed a first offset voltage at an input terminal by a parasitic capacitor of the transmission line; and an offset voltage storage unit configured to store the first offset voltage outputted from the amplifier as a second offset voltage while the transmission of the output signal of the sample and hold circuit through the transmission line is turned off, and offset the first offset voltage by providing the second offset voltage to the input terminal of the amplifier when the output signal of the sample and hold circuit is transmitted through the transmission line.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 2, 2015
    Inventors: Kyung Jik MIN, Hyun Kyu Jeon, Yong Ik Jung, Hyun Ho Cho, Young Bok Kim
  • Publication number: 20150091618
    Abstract: A sample and hold circuit may include: a main sample and hold circuit configured to sample and hold pixel information of an organic light emitting diode (OLED) cell, and output a first output signal; and a dummy sample and hold circuit configured to sample and hold a reference voltage in synchronization with the main sample and hold circuit, and output a second output signal for offsetting a switching noise signal contained in the first output signal.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 2, 2015
    Inventors: Kyung Jik MIN, Hyun Kyu Jeon, Yong Ik Jung, Hyun Ho Cho, Young Bok Kim
  • Patent number: D978954
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: February 21, 2023
    Assignees: Kia Corporation, Hyundai Motor Company
    Inventors: Heung Sun Bong, Hyun Ho Cho
  • Patent number: D1040695
    Type: Grant
    Filed: July 14, 2023
    Date of Patent: September 3, 2024
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Hyun-Doo Lee, Hong-Seok Choi, Hyun-Ho Cho