Patents by Inventor Hong Kyun Leem

Hong Kyun Leem 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).

  • DC voltage conversion circuit of liquid crystal display apparatus
    Patent number: 8749300
    Abstract: Disclosed is a DC voltage conversion circuit of a liquid crystal display apparatus, including: a main pumping circuit including a plurality of thin film transistors and configured to output voltage for driving a liquid crystal display apparatus when the plurality of thin film transistors are alternately turned on or off; and a switch control signal generator configured to control voltages applied to gates of the plurality of thin film transistors by inversion of a clock signal, in which each thin film transistor is turned on when positive gate-source voltage is applied thereto, and turned off when negative gate-source voltage is applied thereto.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: June 10, 2014
    Assignees: Electronics and Telecommunications Research Institute, Konkuk University Industrial Cooperation Corp.
    Inventors: Jae Eun Pi, Kee Chan Park, Hong Kyun Leem, Joon Dong Kim, Youn Kyung Kim, Ji Sun Kim, Byoung Gon Yu, Sang Hee Park, Him Chan Oh, Min Ki Ryu, Chi Sun Hwang
  • Inverter, NAND gate, and NOR gate
    Patent number: 8710866
    Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: April 29, 2014
    Assignees: Electronics and Telecomunications Research Institute, Konkuk University Industrial Cooperation Corp.
    Inventors: Sang Hee Park, Chi Sun Hwang, Sung Min Yoon, Him Chan Oh, Kee Chan Park, Tao Ren, Hong Kyun Leem, Min Woo Oh, Ji Sun Kim, Jae Eun Pi, Byeong Hoon Kim, Byoung Gon Yu
  • INVERTER, NAND GATE, AND NOR GATE
    Publication number: 20140035622
    Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicants: Konkuk University Industrial Cooperation Corp, ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Hee PARK, Chi Sun Hwang, Sung Min Yoon, Him Chan Oh, Kee Chan Park, Tao Ren, Hong Kyun Leem, Min Woo Oh, Ji Sun Kim, Jae Eun Pi, Byeong Hoon Kim, Byoung Gon Yu
  • INVERTER, NAND GATE, AND NOR GATE
    Publication number: 20140035621
    Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicants: Konkuk University Industrial Cooperation Corp, ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Hee PARK, Chi Sun HWANG, Sung MIN Yoon, Him Chan OH, Kee Chan PARK, Tao REN, Hong Kyun LEEM, Min Woo OH, Ji Sun KIM, Jae Eun PI, Byeong Hoon KIM, Byoung Gon YU
  • Inverter, NAND gate, and NOR gate
    Patent number: 8570066
    Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: October 29, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sang Hee Park, Chi Sun Hwang, Sung Min Yoon, Him Chan Oh, Kee Chan Park, Tao Ren, Hong Kyun Leem, Min Woo Oh, Ji Sun Kim, Jae Eun Pi, Byeong Hoon Kim, Byoung Gon Yu
  • INVERTER, NAND GATE, AND NOR GATE
    Publication number: 20120242370
    Abstract: Disclosed are an inverter, a NAND gate, and a NOR gate. The inverter includes: a pull-up unit constituted by a second thin film transistor outputting a first power voltage to an output terminal according to a voltage applied to a gate; a pull-down unit constituted by a fifth thin film transistor outputting a ground voltage to the output terminal according to an input signal applied to a gate; and a pull-up driver applying a second power voltage or the ground voltage to the gate of the second thin film transistor according to the input signal.
    Type: Application
    Filed: January 20, 2012
    Publication date: September 27, 2012
    Applicants: Konkuk University Industrial Cooperation Corp, ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Hee Park, Chi Sun Hwang, Sung Min Yoon, Him Chan Oh, Kee Chan Park, Tao Ren, Hong Kyun Leem, Min Woo Oh, Ji Sun Kim, Jae Eun Pi, Byeong Hoon Kim, Byoung Gon Yu