Patents by Inventor Deok Young Choi

Deok Young Choi 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: 8582715
    Abstract: A stage circuit is capable of concurrently or progressively supplying scan signals. The stage circuit includes a progressive driver including a first transistor and a second transistor, and a concurrent driver including an 11th transistor and a 12th transistor. When the first transistor, the second transistor, the 11th transistor, and the 12th transistor are turned off, lower voltages than voltages applied to source electrodes are applied to gate electrodes such that the transistors can be stably turned off.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: November 12, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Deok-Young Choi, Yong-Jae Kim
  • Publication number: 20130285888
    Abstract: A scan driver includes scan driving blocks, each including: a first transistor including a gate coupled to a first node and receiving a first clock signal, a first electrode receiving an output control signal, and a second electrode coupled to a scan line at first output; a second transistor including a gate coupled to a second node receiving an input signal according to a second clock signal, and first and second electrodes respectively coupled to a third clock input and the first output; a third transistor including a gate coupled to the first node, a first electrode receiving the output control signal, and a second electrode coupled to an input terminal of a next scan driving block at a second output; and a fourth transistor including a gate coupled to the second node, and first and second electrodes respectively coupled to the third clock input and the second output.
    Type: Application
    Filed: August 24, 2012
    Publication date: October 31, 2013
    Inventors: Bo-Yong Chung, Yong-Sung Park, Deok-Young Choi
  • Patent number: 8547372
    Abstract: A pixel circuit and an organic light emitting diode (OLED) display device using the same are provided. The pixel circuit compensates for a threshold voltage of a driver transistor and for a voltage drop, and separately drives an initialization time to improve a contrast ratio. The pixel circuit further suppresses a leakage current caused by a data voltage using a fixed power source so that current variation caused by the leakage current can be reduced or minimized to improve crosstalk, and the duty of an emission control signal can be adjusted to remove motion blur. The pixel circuit also compensates for a leakage current generated in a turn-off state of a transistor with an increase in a drain-source voltage.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: October 1, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Yong-Sung Park, Deok-Young Choi
  • Patent number: 8497461
    Abstract: Embodiments provide a light sensor circuit for a flat panel display which improves resolution at low luminance and increases the range of sensible ambient light by divisionally driving a frame period, in which light is sensed, into a plurality of sub-frames, and a method of driving the light sensor circuit.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: July 30, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Youb Kim, Yong-Sung Park, Tae-Jin Kim, Deok-Young Choi, Joo-Hyeon Jeong, Soon-Sung Ahn, In-Ho Choi, Brent Jang, Ki-Ju Im
  • Patent number: 8497535
    Abstract: In a multilayered photodiode and a method of manufacturing the same, the multilayered photodiode comprises: a transparent substrate; a gate insulating film formed on the transparent substrate; a first metal layer formed on the gate insulating film; a semiconductor layer formed on the first metal layer so as to be in contact with the first metal layer; and a second metal layer formed on the semiconductor layer so as to be in contact with the semiconductor layer. The photodiode is vertically multilayered, and has a metal-insulator-metal (MIM) structure in which a P-N region is replaced by a metal, and in which a light-receiving region does not block incident light.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: July 30, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Beom Lee, Deok-Young Choi, Dae-Hyun Noh, Yong-Sung Park, Won-Kyu Lee
  • Patent number: 8451251
    Abstract: A light sensing circuit includes a photodiode including a cathode electrode and an anode electrode and for receiving light from the outside and generating a current corresponding to the received light, a driving transistor for amplifying the current generated in the photodiode, a capacitor for storing a first initiation voltage transmitted to the driving transistor, a first switching transistor for compensating for a threshold voltage of the driving transistor corresponding to a current scan signal, and a second switching transistor for transmitting the first initiation voltage corresponding to the current scan signal.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: May 28, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Deok-Young Choi, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Publication number: 20130002340
    Abstract: A stage circuit is capable of concurrently or progressively supplying scan signals. The stage circuit includes a progressive driver including a first transistor and a second transistor, and a concurrent driver including an 11th transistor and a 12th transistor. When the first transistor, the second transistor, the 11th transistor, and the 12th transistor are turned off, lower voltages than voltages applied to source electrodes are applied to gate electrodes such that the transistors can be stably turned off.
    Type: Application
    Filed: October 11, 2011
    Publication date: January 3, 2013
    Inventors: Bo-Yong Chung, Deok-Young Choi, Yong-Jae Kim
  • Patent number: 8334853
    Abstract: A light sensor circuit, includes a light receiving element coupled to a first power supply, a capacitor coupled between the light receiving element and a second power supply, a first transistor including a gate electrode coupled to a first electrode of the capacitor, and a second transistor including a gate electrode coupled to a selection signal line, wherein the first transistor is coupled between the selection signal line and a first electrode of the second transistor, and the second transistor is coupled between a second electrode of the first transistor and an output signal line.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: December 18, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Youb Kim, Yong-Sung Park, Deok-Young Choi, Soon-Sung Ahn, In-Ho Choi, Tae-Jin Kim, Joo-Hyeon Jeong, Brent Jang, Ki-Ju Im
  • Publication number: 20120293496
    Abstract: An OLED display device includes first and second group pixels that emit light during first and second fields, respectively; first and second scan lines respectively coupled to the first and second group pixels; and first and second power lines for respectively supplying first and second power voltages to the first and second group pixels. The first and second power lines are coupled with first electrodes of the respective storage capacitors of the first and second group pixels, and the first power voltage is supplied as a first level voltage for a first period during which the first group pixels concurrently emit light. The first and second power lines are coupled with first electrodes of the respective storage capacitors of the first and second group pixels, and the first power voltage is supplied as a first level voltage for a first period during which the first group pixels concurrently emit light.
    Type: Application
    Filed: February 15, 2012
    Publication date: November 22, 2012
    Inventors: Dong-Wook Park, Ki-Nyeng Kang, Deok-Young Choi
  • Patent number: 8289298
    Abstract: A light sensing circuit, a method of driving the same, and a touch panel including the light sensing circuit, the light sensing circuit including a photodiode generating current according to the brightness of light incident from the outside; a driving transistor having a first electrode to which a first power voltage is applied, a second electrode, and a gate electrode electrically connected to a cathode of the photodiode; a first reset transistor having a first electrode to which an initialization voltage is applied, a second electrode connected to the gate electrode of the driving transistor, and a gate electrode to which a previous scan signal is applied; and a shielding capacitor disposed between the gate electrode of the driving transistor and the cathode of the photodiode. Accordingly, the brightness of light incident on the photodiode can be accurately determined by initializing the cathode of the photodiode by using a constant voltage.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: October 16, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Deok-Young Choi, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Publication number: 20120168836
    Abstract: In a multilayered photodiode and a method of manufacturing the same, the multilayered photodiode comprises: a transparent substrate; a gate insulating film formed on the transparent substrate; a first metal layer formed on the gate insulating film; a semiconductor layer formed on the first metal layer so as to be in contact with the first metal layer; and a second metal layer formed on the semiconductor layer so as to be in contact with the semiconductor layer. The photodiode is vertically multilayered, and has a metal-insulator-metal (MIM) structure in which a P-N region is replaced by a metal, and in which a light-receiving region does not block incident light.
    Type: Application
    Filed: September 2, 2011
    Publication date: July 5, 2012
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Dong-Beom Lee, Deok-Young Choi, Dae-Hyun Noh, Yong-Sung Park, Won-Kyu Lee
  • Patent number: 8207670
    Abstract: A paste composition for forming an electrode includes: Component A: a conductive powder; Component B: a glass frit having a transmittance of about 65% or less at a wavelength of 550 nm; Component C: an organic binder; and Component D: a solvent.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: June 26, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Sang Hee Park, Deok Young Choi, Byung Cheol Lee, Hee In Nam, Hyun Don Kim
  • Patent number: 8183518
    Abstract: Provided is a driving circuit of a photosensing touch panel including: a first photodiode coupled between a first voltage source and a sensing node and for generating a first current in accordance with a brightness of an external incident light and a heat of a finger; a second photodiode coupled between the sensing node and a second voltage source and for generating a second current in accordance with the heat of the finger, the second photodiode being shielded from the external incident light; and an amplifier circuit for detecting the brightness of the external incident light regardless of the heat of the finger by subtracting the second current from the first current at the sensing node.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: May 22, 2012
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Soon-Sung Ahn, Yong-Sung Park, Do-Youb Kim, Deok-Young Choi, In-Ho Choi
  • Publication number: 20120038683
    Abstract: A pixel capable of reducing leakage current (to display an image with desired brightness) is provided. The pixel includes: an organic light emitting diode (OLED) coupled to a second power source; a first transistor for controlling an amount of current that flows from a first power source to the second power source via the OLED; a second transistor coupled between a data line and the first transistor, and configured to turn on when a scan signal is supplied to a scan line; a third transistor and a fourth transistor serially coupled between the first transistor and an initializing power source; and a fifth transistor coupled between a first node coupled to a gate electrode of the first transistor, and a second node that is a common node between the third transistor and the fourth transistor, and configured to turn off in a period where current is supplied to the OLED.
    Type: Application
    Filed: February 17, 2011
    Publication date: February 16, 2012
    Inventors: Yong-Sung Park, Deok-Young Choi, Ji-Hye Eom
  • Publication number: 20120038617
    Abstract: There is provided an organic light emitting display device including: pixels positioned at crossing regions of scan lines and data lines; a first control line and a second control line commonly coupled to the pixels; and a control line driver for supplying a first control signal to the first control line for a reset period and for supplying a second control signal to the second control line for a compensation period, wherein each of the pixels includes: an organic light emitting diode; a first transistor for controlling an amount of current supplied from a first power source to a second power source; a second transistor configured to turn on when the second control signal is supplied; and a fourth transistor for supplying an initial voltage to a gate electrode of the first transistor when the first control signal is supplied.
    Type: Application
    Filed: June 6, 2011
    Publication date: February 16, 2012
    Inventors: Bo-Yong Chung, Deok-Young Choi
  • Publication number: 20120019501
    Abstract: A pixel and display having the pixel are disclosed. The pixel includes transistors along a leakage path from a storage capacitor. The pixel also includes transistors to apply a reference voltage to the leakage path to minimize leakage.
    Type: Application
    Filed: January 21, 2011
    Publication date: January 26, 2012
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventor: Deok-Young Choi
  • Publication number: 20110233387
    Abstract: Embodiments provide a light sensor circuit for a flat panel display which improves resolution at low luminance and increases the range of sensible ambient light by divisionally driving a frame period, in which light is sensed, into a plurality of sub-frames, and a method of driving the light sensor circuit.
    Type: Application
    Filed: March 7, 2011
    Publication date: September 29, 2011
    Inventors: Do-Youb Kim, Yong-Sung Park, Tae-Jin Kim, Deok-Young Choi, Joo-Hyeon Jeong, Soon-Sung Ahn, In-Ho Choi, Brent Jang, Ki-Ju Im
  • Publication number: 20110193768
    Abstract: A pixel includes: an OLED; a first transistor having a first electrode coupled to a power source and a second electrode coupled to the OLED and configured to control a magnitude of current supplied to the OLED; a third transistor having a first electrode coupled a first node and a second electrode coupled to a gate electrode of the first transistor; a capacitor coupled between the first node and a second electrode of the first transistor; a second transistor having a first electrode coupled to the first node and a second electrode coupled to a data line and configured to be turned on when the third transistor is turned off; and a fourth transistor having a first electrode coupled to a gate electrode of the first transistor and a second electrode coupled to a reference power source and configured to be turned on and off concurrently with the second transistor.
    Type: Application
    Filed: September 10, 2010
    Publication date: August 11, 2011
    Inventors: In-Ho Choi, Yong-Sung Park, Deok-Young Choi, Soon-Sung Ahn, Chul-Kyu Kang
  • Publication number: 20110157126
    Abstract: A pixel circuit and an organic light emitting diode (OLED) display device using the same are provided. The pixel circuit compensates for a threshold voltage of a driver transistor and for a voltage drop, and separately drives an initialization time to improve a contrast ratio. The pixel circuit further suppresses a leakage current caused by a data voltage using a fixed power source so that current variation caused by the leakage current can be reduced or minimized to improve crosstalk, and the duty of an emission control signal can be adjusted to remove motion blur. The pixel circuit also compensates for a leakage current generated in a turn-off state of a transistor with an increase in a drain-source voltage.
    Type: Application
    Filed: September 8, 2010
    Publication date: June 30, 2011
    Inventors: Bo-Yong Chung, Yong-Sung Park, Deok-Young Choi
  • Publication number: 20110157144
    Abstract: A pixel of a display with reduced leakage current is disclosed. The pixel includes: an organic light emitting diode; a first transistor for controlling an amount of current flowing from a first power source to a second power source via the organic light emitting diode; a storage capacitor coupled between the first power source and a gate electrode of the first transistor; a plurality of third transistors coupled between the gate electrode and a second electrode of the first transistor; and a plurality of fourth transistors coupled between the gate electrode of the first transistor and an initialization power source. The third and fourth transistors are configured to reduce a leakage current from the storage capacitor to improve the image quality of the display.
    Type: Application
    Filed: September 21, 2010
    Publication date: June 30, 2011
    Inventors: Yong-Sung Park, Bo-Yong Chung, Deok-Young Choi