Patents by Inventor Hyeon-Ja Jo

Hyeon-Ja Jo 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: 10783976
    Abstract: A memory device includes a memory cell array comprising a plurality of antifuse memory cells coupled to a plurality of word lines, a plurality of voltage lines and a plurality of bit lines, and a first decoder suitable for generating a word line driving signal associated with a target memory cell among the plurality of antifuse memory cells in response to a first address, and asserting the word line driving signal at least twice during a program operation.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: September 22, 2020
    Assignee: SK hynix Inc.
    Inventor: Hyeon-Ja Jo
  • Publication number: 20190392911
    Abstract: A memory device includes a memory cell array comprising a plurality of antifuse memory cells coupled to a plurality of word lines, a plurality of voltage lines and a plurality of bit lines, and a first decoder suitable for generating a word line driving signal associated with a target memory cell among the plurality of antifuse memory cells in response to a first address, and asserting the word line driving signal at least twice during a program operation.
    Type: Application
    Filed: June 26, 2019
    Publication date: December 26, 2019
    Inventor: Hyeon-Ja JO
  • Patent number: 10229628
    Abstract: A gamma voltage generator includes a reference gamma voltage generating circuit and a gamma voltage generating circuit. The reference gamma voltage generating circuit is configured to generate first reference gamma voltages, second reference gamma voltages, third reference gamma voltages, and a common reference gamma voltage. The gamma voltage generating circuit is configured to generate first gamma voltages, second gamma voltages, and third gamma voltages using the first reference gamma voltages, the second reference gamma voltages, the third reference gamma voltages, and the common reference gamma voltage.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: March 12, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hyeon-Ja Jo
  • Publication number: 20170162108
    Abstract: A gamma voltage generator includes a reference gamma voltage generating circuit and a gamma voltage generating circuit. The reference gamma voltage generating circuit is configured to generate first reference gamma voltages, second reference gamma voltages, third reference gamma voltages, and a common reference gamma voltage. The gamma voltage generating circuit is configured to generate first gamma voltages, second gamma voltages, and third gamma voltages using the first reference gamma voltages, the second reference gamma voltages, the third reference gamma voltages, and the common reference gamma voltage.
    Type: Application
    Filed: December 1, 2016
    Publication date: June 8, 2017
    Inventor: HYEON-JA JO
  • Publication number: 20170069292
    Abstract: An image compensating device includes an image detector, an environmental analyzer, and a compensation coefficient output. The image detector display one or more test images and collects image perception information from a user. The environmental analyzer analyzes an environment of the user based on the image perception information. The compensation coefficient output outputs a compensation coefficient that compensates image data based on the environment of the user.
    Type: Application
    Filed: April 29, 2016
    Publication date: March 9, 2017
    Inventor: Hyeon-Ja JO
  • Patent number: 9343015
    Abstract: An organic light emitting display device includes pixels each including a driving transistor and an organic light emitting diode, and a sensing unit configured to extract threshold voltage information of the driving transistor and degradation information of the organic light emitting diode from each of the pixels, wherein the sensing unit includes a conversion unit configured to convert pixel current supplied from a respective one of the pixels into a first voltage, and configured to convert a reference current from a current source into a second voltage, and a comparison unit configured to calculate a difference between the first voltage and the second voltage, and configured to output a comparison voltage corresponding to the difference.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: May 17, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyeon-Ja Jo
  • Publication number: 20150029171
    Abstract: An organic light emitting display device includes pixels each including a driving transistor and an organic light emitting diode, and a sensing unit configured to extract threshold voltage information of the driving transistor and degradation information of the organic light emitting diode from each of the pixels, wherein the sensing unit includes a conversion unit configured to convert pixel current supplied from a respective one of the pixels into a first voltage, and configured to convert a reference current from a current source into a second voltage, and a comparison unit configured to calculate a difference between the first voltage and the second voltage, and configured to output a comparison voltage corresponding to the difference.
    Type: Application
    Filed: March 31, 2014
    Publication date: January 29, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventor: Hyeon-Ja Jo
  • Publication number: 20140160094
    Abstract: A readout unit having an operation part configured to readout from a pixel circuit of a display panel to receive an input voltage indicating a pixel voltage based on a driving current driving an organic light emitting diode, to receive a reference voltage from a reference voltage terminal, and to compare the input voltage with the reference voltage to output an output voltage indicating a difference between the input voltage and the reference voltage, and an analog-digital converting part configured to convert a converter input voltage using the converter input voltage and an amplified voltage, the converter input voltage being based on the output voltage, the amplified voltage being amplified from the converter input voltage. Thus, change of a pixel may be accurately sensed irrelevantly to a capacitor of a display panel.
    Type: Application
    Filed: May 29, 2013
    Publication date: June 12, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventor: Hyeon-Ja JO
  • Publication number: 20140085171
    Abstract: A driving circuit for a flat panel display device is disclosed. In one aspect, the driving circuit includes a first region having a first width and a first length, a second region on one side of the first region and having the first width and the first length, and a third region on one side of the second region and having a second width and a second length, wherein the second width and the second length are different from the first width and the first length. The driving circuit also includes a fourth region on one side of the third region and having the second width and the second length, wherein each region has one or more transistors of only one type.
    Type: Application
    Filed: January 29, 2013
    Publication date: March 27, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventor: Hyeon-Ja Jo