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).

  • Publication number: 20110134100
    Abstract: An organic electro-luminescent display apparatus can compensate for the threshold voltage and voltage drop of the driving transistor. The organic electro-luminescent display apparatus divides and drives an initialization time, thereby improving a contrast ratio. The organic electro-luminescent display apparatus minimizes or reduces the change of a current due to a leakage current by correcting the leakage current corresponding to a data voltage with a fixed power source, thereby improving crosstalk. The organic electro-luminescent display apparatus adjusts the duty of the emission control signal, thereby removing or reducing motion blur.
    Type: Application
    Filed: August 30, 2010
    Publication date: June 9, 2011
    Inventors: Bo-Yong Chung, Yong-Sung Park, Deok-Young Choi
  • Publication number: 20110050600
    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: Application
    Filed: May 14, 2010
    Publication date: March 3, 2011
    Inventors: Do-Youb Kim, Yong-Sung Park, Deok-Young Choi, Soon-Sung Ahn, In-Ho Choi, Tae-Jin Kim, Joo-Hyeton Jeong, Brent Jang, Ki-Ju Kim
  • Publication number: 20110001711
    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: Application
    Filed: March 9, 2010
    Publication date: January 6, 2011
    Inventors: Deok-Young Choi, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Patent number: 7794627
    Abstract: A paste composition for an electrode includes a conductive material, a colored glass frit, the glass frit exhibiting a blackness (L*) value of about 85 or less, a binder, and a solvent.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: September 14, 2010
    Assignee: Cheil Industries, Inc.
    Inventors: Sang Hee Park, Deok Young Choi, Byung Cheol Lee, Hee In Nam, Hyun Don Kim
  • Publication number: 20100220069
    Abstract: A light sensing circuit, a method of controlling the same, and a touch panel including the light sensing circuit. In the method of controlling the light sensing circuit, including sensing light incident on a photodiode, generating current corresponding to the brightness of the sensed light, amplifying the current using a driving transistor, and outputting the amplified current, the ambient temperature is sensed, and a time period during which the light is sensed by the photodiode or the amplified current is output is controlled by the sensed ambient temperature. Thus, the sensitivity of the light sensing circuit may be constantly maintained without being influenced by the ambient temperature.
    Type: Application
    Filed: November 4, 2009
    Publication date: September 2, 2010
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Deok-Young Choi, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Publication number: 20100156290
    Abstract: A paste composition for an electrode, a PDP including the electrode, and associated methods, the paste composition including a conductive material, a black pigment, a glass frit, and an organic binder, wherein the black pigment includes a magnetic black pigment, the magnetic black pigment being included in an amount of about 0.1 to about 20 wt %, based on the total weight of the composition.
    Type: Application
    Filed: December 16, 2009
    Publication date: June 24, 2010
    Inventors: Yong Hyun Kim, Jae Hwan Oh, Sang Hee Park, Deok Young Choi, Hyun Don Kim
  • Publication number: 20100097350
    Abstract: A photo sensing device, a photo sensing circuit, a touch panel, and a method of sensing an output value of a photo sensing element, in order to remove the influence of a threshold voltage. The device includes a photo sensing unit generating a sensing current according to an intensity of incident light, a driving unit outputting a driving current according to the sensing current generated by the photo sensing unit, and a scanning unit outputting on a data line the driving current of the driving unit in a first mode corresponding to the photo sensing unit gathering light for a predetermined period of time and outputting the driving current in a second mode corresponding to the photo sensing unit initializing.
    Type: Application
    Filed: September 28, 2009
    Publication date: April 22, 2010
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Deok-Young CHOI, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Publication number: 20100097334
    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: Application
    Filed: September 29, 2009
    Publication date: April 22, 2010
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Deok-Young Choi, Yong-Sung Park, Do-Youb Kim, Soon-Sung Ahn, In-Ho Choi
  • Publication number: 20100097354
    Abstract: A light sensing circuit of a touch panel includes a photodiode including an anode and a cathode; a driving transistor including a gate electrode connected to the cathode of the photodiode, a first electrode to receive a first ground voltage, and a second electrode; a first switching transistor including a first electrode connected to the second electrode of the driving transistor, a second electrode to output a data signal, and a gate electrode to receive a scan signal; a first capacitor including a first terminal connected to the cathode of the photodiode, and a second terminal; and a voltage compensating unit to apply a compensation voltage to the second terminal of the first capacitor.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 22, 2010
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Soon-Sung AHN, Yong-Sung Park, Do-Youb Kim, Deok-Young Choi, In-Ho Choi
  • Publication number: 20100012823
    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: Application
    Filed: July 13, 2009
    Publication date: January 21, 2010
    Inventors: Soon-Sung Ahn, Yong-Sung Park, Do-Youb Kim, Deok-Young Choi, In-Ho Choi
  • Publication number: 20090295267
    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: Application
    Filed: May 26, 2009
    Publication date: December 3, 2009
    Inventors: Sang Hee Park, Deok Young Choi, Byung Cheol Lee, Hee In Nam, Hyun Don Kim
  • Publication number: 20090237332
    Abstract: A pixel for use in a light emitting display capable of being stably initialized without a separate initialization power. An exemplary embodiment of the pixel includes six transistors, a storage capacitor, and an organic light emitting diode OLED. A data signal supplied through a data line is transmitted into the pixel in response to a current scan signal supplied through a current scan line. A drive current corresponding to the data signal drives the OLED. One transistor is utilized to diode-connect the driving transistor in response to the current scan signal, compensating for variability in the threshold voltage of the driving transistor. The storage capacitor stores the data signal. The storage capacitor is initialized to a low voltage in response to a previous scan signal supplied before the current scan signal. The organic light emitting diode OLED emits light corresponding to the drive current supplied from the driving transistor.
    Type: Application
    Filed: February 4, 2009
    Publication date: September 24, 2009
    Inventor: Deok-Young Choi
  • Publication number: 20090140957
    Abstract: A pixel circuit with stable lamination is disclosed. A leakage current which would otherwise cause the voltage at the gate of the drive transistor to change, resulting in a change in the current to the OLED, is compensated for by an additional transistor.
    Type: Application
    Filed: July 7, 2008
    Publication date: June 4, 2009
    Inventors: Yong-Sung Park, Deok-Young Choi, Do-Youb Kim
  • Publication number: 20080261077
    Abstract: A paste composition for an electrode includes a conductive material, a colored glass frit, the glass frit exhibiting a blackness (L*) value of about 85 or less, a binder, and a solvent.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 23, 2008
    Inventors: Sang Hee Park, Deok Young Choi, Byung Cheol Lee, Hee In Nam, Hyun Don Kim
  • Publication number: 20080073624
    Abstract: A light-diffusing resin composition is provided. The light-diffusing resin composition comprises a matrix resin containing a conjugated diene rubber resin. The matrix resin may be prepared by graft polymerization of a monomer mixture or a copolymer of an alkyl methacrylate or an alkyl acrylate, an aromatic vinyl compound and a vinylcyan compound onto a conjugated diene rubber resin. The light-diffusing resin composition has advanced mechanical properties, such as high impact resistance and improved processibility.
    Type: Application
    Filed: June 28, 2007
    Publication date: March 27, 2008
    Applicant: LG Chem, Ltd.
    Inventors: Jeong Su Choi, Deok Young Choi, Seung Hyun Kim, Keun Hoon Yoo, Hyong Min Bahn