Patents by Inventor Pyung-Sik MA

Pyung-Sik MA 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: 11538432
    Abstract: An input stage configured to differentially amplify an input signal and an output signal, a first current mirror and a second current mirror configured to receive a differential current from the input stage, an output stage including first and second output transistors, respectively including a gate connected to the first and second current mirrors, and a slew rate compensation circuit configured to (i) mirror a comparison current generated by comparing a voltage of a first input signal with a voltage of a second input signal, and (ii) provide the mirrored comparison current to the gate of the first or second output transistor.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: December 27, 2022
    Assignee: DB HiTek, Co., Ltd.
    Inventors: Hak Jin Jung, Eun Ji Youn, Pyung Sik Ma
  • Publication number: 20220238081
    Abstract: An input stage configured to differentially amplify an input signal and an output signal, a first current mirror and a second current mirror configured to receive a differential current from the input stage, an output stage including first and second output transistors, respectively including a gate connected to the first and second current mirrors, and a slew rate compensation circuit configured to (i) mirror a comparison current generated by comparing a voltage of a first input signal with a voltage of a second input signal, and (ii) provide the mirrored comparison current to the gate of the first or second output transistor.
    Type: Application
    Filed: December 15, 2021
    Publication date: July 28, 2022
    Inventors: Hak Jin JUNG, Eun Ji YOUN, Pyung Sik MA
  • Patent number: 10978036
    Abstract: A sound absorbing cell according to an exemplary embodiment of the present invention is formed of a plurality of plates that are stacked while interposing an air layer therebetween, wherein the plurality of plates include: a reflective plate that is disposed outermost from a space where sound is generated; and a microperforated plate that is stacked on the reflective plate and having a plurality of holes perforated therein.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 13, 2021
    Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Hyun-Sil Kim, Pyung-Sik Ma, Yun-Ho Seo, Seong-Hyun Lee, Sang Ryul Kim, Bong-Ki Kim, Jae Seung Kim
  • Publication number: 20190080676
    Abstract: A sound absorbing cell according to an exemplary embodiment of the present invention is formed of a plurality of plates that are stacked while interposing an air layer therebetween, wherein the plurality of plates include: a reflective plate that is disposed outermost from a space where sound is generated; and a microperforated plate that is stacked on the reflective plate and having a plurality of holes perforated therein.
    Type: Application
    Filed: February 21, 2018
    Publication date: March 14, 2019
    Inventors: Hyun-Sil Kim, Pyung-Sik Ma, Yun-Ho Seo, Seong-Hyun Lee, Sang Ryul Kim, Bong-Ki Kim, Jae Seung Kim
  • Patent number: 9406273
    Abstract: Disclosed are a flat panel display apparatus and a source driver integrated circuit. The flat panel display apparatus and the source driver integrated circuit supply power to each position in the source driver integrated circuit at a uniform level, so that the output characteristics of a plurality of units using the power are uniform.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: August 2, 2016
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Young Bok Kim, Pyung Sik Ma
  • Publication number: 20150062107
    Abstract: Disclosed are a flat panel display apparatus and a source driver integrated circuit. The flat panel display apparatus and the source driver integrated circuit supply power to each position in the source driver integrated circuit at a uniform level, so that the output characteristics of a plurality of units using the power are uniform.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 5, 2015
    Inventors: Young Bok KIM, Pyung Sik Ma
  • Patent number: 8803859
    Abstract: The present invention relates to a display driving circuit and a display driving system, and more particularly, to a display driving circuit having a half-VDD power supply circuit built therein and a display driving system including the same, in which the display driving circuit is further provided with a half voltage VDD terminal in addition to the highest voltage VDD terminal and the lowest voltage VSS terminal, and the half voltage, which is between the highest voltage and the lowest voltage, is generated and supplied by the half voltage power supply from the inside of the display driving circuit, rather than being supplied from an external power supply.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: August 12, 2014
    Assignee: Silicon Works Co., Ltd.
    Inventors: Hyun Ho Cho, Yong Bok Kim, Pyung Sik Ma, An Young Kim, Yong Icc Jung, Joon Ho Na
  • Patent number: 8599179
    Abstract: Disclosed is a source driver integrated circuit with an improved slew rate by disposing a switching unit, which operates as a resistance component during display driving, before the feedback line of an output buffer. According to the source driver integrated circuit with an improved slew rate, a switching unit, which operates as a resistance component when a signal is transferred, is disposed in the feedback loop of an output buffer, so that the resistance component is not shown to a panel load, thereby improving the slew rate of an output signal. In addition, the improved slew rate makes it possible to easily implement an image through a display.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: December 3, 2013
    Assignee: Silicon Works Co., Ltd.
    Inventors: Ji Hun Kim, Pyung Sik Ma, Young Bok Kim, Hyun Ho Cho, Joon Ho Na
  • Publication number: 20120161661
    Abstract: The present invention relates to a display driving circuit and a display driving system, and more particularly, to a display driving circuit having a half-VDD power supply circuit built therein and a display driving system including the same, in which the display driving circuit is further provided with a half voltage VDD terminal in addition to the highest voltage VDD terminal and the lowest voltage VSS terminal, and the half voltage, which is between the highest voltage and the lowest voltage, is generated and supplied by the half voltage power supply from the inside of the display driving circuit, rather than being supplied from an external power supply.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 28, 2012
    Applicant: SILICON WORKS CO., LTD
    Inventors: Hyun-Ho CHO, Young-Bok KIM, Pyung-Sik MA, An-Young KIM, Yong-Icc JUNG, Joon-Ho NA
  • Publication number: 20120081338
    Abstract: Disclosed is a source driver integrated circuit with an improved slew rate by disposing a switching unit, which operates as a resistance component during display driving, before the feedback line of an output buffer. According to the source driver integrated circuit with an improved slew rate, a switching unit, which operates as a resistance component when a signal is transferred, is disposed in the feedback loop of an output buffer, so that the resistance component is not shown to a panel load, thereby improving the slew rate of an output signal. In addition, the improved slew rate makes it possible to easily implement an image through a display.
    Type: Application
    Filed: September 28, 2011
    Publication date: April 5, 2012
    Applicant: SILICON WORKS CO., LTD
    Inventors: Ji-Hun KIM, Pyung-Sik MA, Young-Bok KIM, Hyun-Ho CHO, Joon-Ho NA