Patents by Inventor Choong-Sik Ryu

Choong-Sik Ryu 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: 11843885
    Abstract: Disclosed is an image sensing device including a pixel array including a plurality of pixels arranged in rows and columns, and suitable for outputting a plurality of pixel signals, and a plurality of readout circuits coupled to the pixel array, and suitable for compensating for readout deviations among the plurality of pixel signals, based on a plurality of bias voltages having different voltage levels, when reading out the plurality of pixel signals.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: December 12, 2023
    Assignee: SK hynix Inc.
    Inventor: Choong Sik Ryu
  • Patent number: 11764237
    Abstract: An image sensing device includes a pixel array including a plurality of pixels arranged in rows and columns, and suitable for outputting a plurality of pixel signals, and a plurality of readout circuits coupled to the pixel array, and suitable for compensating for readout deviations among the plurality of pixel signals when reading out the plurality of pixel signals.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: September 19, 2023
    Assignee: SK hynix Inc.
    Inventor: Choong-Sik Ryu
  • Publication number: 20210377474
    Abstract: Disclosed is an image sensing device including a pixel array including a plurality of pixels arranged in rows and columns, and suitable for outputting a plurality of pixel signals, and a plurality of readout circuits coupled to the pixel array, and suitable for compensating for readout deviations among the plurality of pixel signals, based on a plurality of bias voltages having different voltage levels, when reading out the plurality of pixel signals.
    Type: Application
    Filed: October 30, 2020
    Publication date: December 2, 2021
    Inventor: Choong Sik RYU
  • Publication number: 20210082980
    Abstract: An image sensing device includes a pixel array including a plurality of pixels arranged in rows and columns, and suitable for outputting a plurality of pixel signals, and a plurality of readout circuits coupled to the pixel array, and suitable for compensating for readout deviations among the plurality of pixel signals when reading out the plurality of pixel signals.
    Type: Application
    Filed: April 27, 2020
    Publication date: March 18, 2021
    Inventor: Choong-Sik RYU
  • Patent number: 10586498
    Abstract: A source driver includes a latch configured to store data based on or in response to a latch signal and output the data stored in the latch, a resistor string including a plurality of resistors configured to provide a plurality of grayscale voltages, a decoder connected to the resistor string, configured to select and output one of the plurality of grayscale voltages based on or in response to the data from the latch, an amplifier including a first input terminal, a second input terminal and an output terminal, a first control switch between the decoder and the first input terminal of the amplifier, and a second control switch between the first input terminal and the second input terminal of the amplifier. The first control switch and the second control switch are alternately turned on and off.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 10, 2020
    Assignee: DB Hitek Co., Ltd.
    Inventor: Choong Sik Ryu
  • Publication number: 20190189061
    Abstract: A source driver includes a latch configured to store data based on or in response to a latch signal and output the data stored in the latch, a resistor string including a plurality of resistors configured to provide a plurality of grayscale voltages, a decoder connected to the resistor string, configured to select and output one of the plurality of grayscale voltages based on or in response to the data from the latch, an amplifier including a first input terminal, a second input terminal and an output terminal, a first control switch between the decoder and the first input terminal of the amplifier, and a second control switch between the first input terminal and the second input terminal of the amplifier. The first control switch and the second control switch are alternately turned on and off.
    Type: Application
    Filed: June 26, 2018
    Publication date: June 20, 2019
    Inventor: Choong Sik RYU
  • Patent number: 9384705
    Abstract: A gate driver is disclosed. The disclosed gate driver includes a shift register configured to generate a shift signal. The shift signal is based on a gate start signal and a gate clock signal. The gate driver further includes a gate drive signal generator configured to generate a gate drive signal. The gate drive signal is based on a gate control signal and the shift signal. The rising edge of the gate control signal precedes the falling edge of the shift signal, and the falling edge of the gate control signal follows the falling edge of the shift signal. The gate drive signal falls from a second voltage to a third voltage in response to the falling edge of the shift signal and rises from the third voltage to a first voltage in response to the falling edge of the gate control signal. The first voltage is higher than the third voltage but lower than the second voltage.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: July 5, 2016
    Assignee: Dongbu Hitek Co., Ltd.
    Inventors: Choong Sik Ryu, Eun Mee Lee
  • Patent number: 9230470
    Abstract: A data driver includes a data storage unit configured to store a data signal therein, a level shifting block configured to shift a level of the data signal and output a level shifted data signal based on the result of the level shifting, a waveform conversion block configured to convert a waveform of the level shifted data signal and generate a conversion data signal (e.g., based on the waveform conversion), and a digital-analog conversion unit configured to output an analog signal based on the conversion data signal, wherein the conversion data signal has a rising time and a descending time that are different from each other.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: January 5, 2016
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Choong Sik Ryu
  • Publication number: 20150339962
    Abstract: A data driver includes a data storage unit configured to store a data signal therein, a level shifting block configured to shift a level of the data signal and output a level shifted data signal based on the result of the level shifting, a waveform conversion block configured to convert a waveform of the level shifted data signal and generate a conversion data signal (e.g., based on the waveform conversion), and a digital-analog conversion unit configured to output an analog signal based on the conversion data signal, wherein the conversion data signal has a rising time and a descending time that are different from each other.
    Type: Application
    Filed: September 30, 2014
    Publication date: November 26, 2015
    Applicant: DONGBU HITEK CO., LTD.
    Inventor: Choong Sik RYU
  • Publication number: 20150325214
    Abstract: A data driver includes a random delay unit configured to receive and delay a first control signal and to generate a random delay signal based on the delay, a latch unit configured to store data in response to the random delay signal, a digital-analog conversion unit configured to convert the data from the latch unit into an analog signal, and an output unit configured to amplify and output the analog signal, wherein the time delay between the first control signal and the random delay signal is random.
    Type: Application
    Filed: February 23, 2015
    Publication date: November 12, 2015
    Applicant: Dongbu HiTek Co., Ltd.
    Inventor: Choong Sik RYU
  • Publication number: 20150294635
    Abstract: A gate driver is disclosed. The disclosed gate driver includes a shift register configured to generate a shift signal. The shift signal is based on a gate start signal and a gate clock signal. The gate driver further includes a gate drive signal generator configured to generate a gate drive signal. The gate drive signal is based on a gate control signal and the shift signal. The rising edge of the gate control signal precedes the falling edge of the shift signal, and the falling edge of the gate control signal follows the falling edge of the shift signal. The gate drive signal falls from a second voltage to a third voltage in response to the falling edge of the shift signal and rises from the third voltage to a first voltage in response to the falling edge of the gate control signal. The first voltage is higher than the third voltage but lower than the second voltage.
    Type: Application
    Filed: June 27, 2014
    Publication date: October 15, 2015
    Inventors: Choong Sik Ryu, Eun Mee Lee
  • Patent number: 8421787
    Abstract: A circuit and method for driving a line repair amplifier includes a line repair amplifier which can be driven by using a single side input which can use an amplifier which drives a gray high side only and an amplifier which drives a gray low side only separately in a liquid crystal display device which uses a line repair amplifier.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 16, 2013
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Choong-Sik Ryu
  • Publication number: 20100164942
    Abstract: A circuit and method for driving a line repair amplifier includes a line repair amplifier which can be driven by using a single side input which can use an amplifier which drives a gray high side only and an amplifier which drives a gray low side only separately in a liquid crystal display device which uses a line repair amplifier.
    Type: Application
    Filed: December 22, 2009
    Publication date: July 1, 2010
    Inventor: Choong-Sik Ryu