Patents by Inventor Seok Woo Lee

Seok Woo Lee 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: 7710385
    Abstract: An data driver for driving an LCD device includes a modulator that generates modulated data from input data; and a control circuit to selects between converting the modulated data to first analog data of a driving output and converting the input data to second analog data of the driving output, and to supply the driving output to the plurality of data lines. The driving output may provide a gray-to-gray response time of the LCD device substantially the same as one of a black-to-white and a white-to-black response time of the LCD device by reducing actual liquid crystal response time of the LCD device.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: May 4, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Seok Woo Lee, Hyun Jin So
  • Publication number: 20100103338
    Abstract: A liquid crystal display includes an insulating substrate having a pixel portion divided into a thin film transistor region and a storage region, a first active layer formed on the substrate to cover at least the thin film transistor region, and a storage electrode formed on the first active layer to selectively cover the storage region.
    Type: Application
    Filed: January 6, 2010
    Publication date: April 29, 2010
    Inventors: Seok-Woo LEE, Young-Joo Kim
  • Patent number: 7704807
    Abstract: A multi-channel type thin film transistor includes a gate electrode over a substrate extending along a first direction, a plurality of active layers parallel to and spaced apart from each other extending along a second direction crossing the first direction, and source and drain electrodes spaced apart from each other with respect to the gate electrode and extending along the first direction, wherein each of the plurality of active layers includes a channel region overlapped with the gate electrode, a source region, a drain region, and lightly doped drain (LDD) regions, one between the channel region and the source region and another one between the channel region and the drain region, wherein the LDD regions of the adjacent active layers have different lengths from each other.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: April 27, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Seok-Woo Lee, Jae-Sung Yu
  • Patent number: 7652727
    Abstract: A liquid crystal display and a method for fabricating the same are disclosed. The method for fabricating a liquid crystal display includes preparing an insulating substrate defining a pixel portion divided into a thin film transistor region and a storage region, sequentially forming a polycrystalline silicon film and a storage electrode film on an entire surface of the substrate, selectively patterning the storage electrode film and the polycrystalline silicon film to form a pixel pattern that covers the pixel portion, and selectively removing the storage electrode film in the thin film transistor region to simultaneously form a first active layer in the thin film transistor region and form a storage electrode in the storage region, wherein the active layer is formed of the polycrystalline silicon film and the storage electrode is formed of the storage electrode film.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: January 26, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Seok-Woo Lee, Young-Joo Kim
  • Publication number: 20100009480
    Abstract: A thin film transistor including: an active layer on a substrate, the active layer having at least two unit channels; and source and drain electrodes on the active layer, wherein an interval D between each of the channels is larger than a unit channel width W.
    Type: Application
    Filed: September 16, 2009
    Publication date: January 14, 2010
    Inventor: Seok Woo Lee
  • Patent number: 7645063
    Abstract: A backlight unit, in which an incident surface of a light-guiding plate is formed in a shape of a curve, or a curve-shaped structure is formed in a housing to improve the light efficiency. The backlight unit includes a light source emitting light; a housing surrounding the light source; a light-guiding plate guiding the light emitted from the light source to an LCD panel, wherein the light-guiding plate has an incident surface formed in a shape of a curve; and a reflective sheet formed under the light-guiding plate.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: January 12, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Seok Woo Lee, Do Yune Kim
  • Patent number: 7642554
    Abstract: An array substrate for an LCD device and a method of fabricating the same are disclosed. The array substrate includes: a substrate defining a display area and a non-display area; an n-type driving TFT and a p-type driving TFT in the non-display area; a switching TFT in the display region; a storage capacitor in the display region, the storage capacitor including first to third storage layers sequentially layered with intervening insulating layers, wherein the first storage layer contacts a first semiconductor layer under the first storage layer; and a pixel electrode in the display region, the pixel electrode connected to the switching TFT.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: January 5, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Seok-Woo Lee, Yong-In Park
  • Patent number: 7633573
    Abstract: An LCD device and a method of fabricating the same are provided. The LCD device comprises a first substrate divided into a pixel unit and a circuit unit. Active patterns are disposed in the pixel unit and the circuit unit of the first substrate. A first insulating film is disposed on the first substrate. Gate electrodes are disposed in the pixel unit and the circuit unit of the first substrate, and common lines are disposed in the pixel unit of the first substrate. First contact holes and second contact holes are disposed in regions of the first insulating film, the first interlayer insulating film and the second interlayer insulating film. Source electrodes and drain electrodes electrically connect to the source regions and the drain regions of the active patterns through the first contact holes and the second contact holes.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: December 15, 2009
    Assignee: LG. Display Co., Ltd.
    Inventors: Young-Joo Kim, Seok-Woo Lee
  • Patent number: 7616139
    Abstract: An analog-to-digital converter (ADC) is provided to determine a digital output value according to whether electric current flows between a plurality of probes, to which an input voltage is applied, and a plurality of electrodes. Therefore, high resolution and high speed operation is possible, but with lower power consumption.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: November 10, 2009
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Young-Tack Houng, Sang-Wook Kwon, In-Sang Song, Seung Seob Lee, Kangwon Lee, Seok Woo Lee, Phillip Lee
  • Publication number: 20090269872
    Abstract: An array substrate for a liquid crystal display (LCD) device includes a substrate including a display region and a non-display region, a driving circuit in the non-display region, at least a first thin film transistor (TFT) in the display region, a storage capacitor in the display region including a first storage electrode, a second storage electrode, and a third storage electrode, wherein the first storage electrode includes a first semiconductor layer and a counter electrode, and the third storage electrode includes a first transparent electrode pattern and a first metal pattern, a gate line and a data line crossing each other to define a pixel region in the display region, and a pixel electrode connected to the first TFT in the pixel region.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 29, 2009
    Inventors: Seok-Woo LEE, Yong-In PARK
  • Publication number: 20090263941
    Abstract: A multi-channel type thin film transistor includes a gate electrode over a substrate extending along a first direction, a plurality of active layers parallel to and spaced apart from each other extending along a second direction crossing the first direction, and source and drain electrodes spaced apart from each other with respect to the gate electrode and extending along the first direction, wherein each of the plurality of active layers includes a channel region overlapped with the gate electrode, a source region, a drain region, and lightly doped drain (LDD) regions, one between the channel region and the source region and another one between the channel region and the drain region, wherein the LDD regions of the adjacent active layers have different lengths from each other.
    Type: Application
    Filed: June 22, 2009
    Publication date: October 22, 2009
    Inventors: Seok-Woo Lee, Jae-Sung Yu
  • Patent number: 7605400
    Abstract: A thin film transistor including: an active layer on a substrate, the active layer having at least two unit channels; and source and drain electrodes on the active layer, wherein an interval D between each of the channels is larger than a unit channel width W.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: October 20, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Seok Woo Lee
  • Patent number: 7602454
    Abstract: A liquid crystal display and a method for fabricating the same are disclosed.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: October 13, 2009
    Assignee: LG Display Co., Ltd
    Inventors: Young-Joo Kim, Seok-Woo Lee, Soo-Jeong Park
  • Publication number: 20090251630
    Abstract: A method for fabricating a liquid crystal display (LCD) device includes providing a first substrate including a pixel portion and a circuit portion, the circuit portion having first and second regions; forming an active pattern and a first gate insulation film at the pixel portion and the circuit portion and forming a storage electrode on a portion of the active pattern of the pixel portion; forming a second gate insulation film on the first substrate; forming a gate electrode at the first region and forming p+ source and drain regions at portions of the active pattern of the first region; forming a gate electrode at the pixel portion and the second region, and forming a common line at the pixel portion; forming n+ source and drain regions at the pixel portion and at a portion of the active pattern of the second region; and joining the first and second substrates.
    Type: Application
    Filed: June 9, 2009
    Publication date: October 8, 2009
    Inventors: Soo-Jeong Park, Young-Joo Kim, Seok-Woo Lee
  • Publication number: 20090233392
    Abstract: Disclosed is a liquid crystal display (LCD) device having gate and data driving elements with improved heat dissipation properties. The driving elements each have the following: a source and a drain electrode, each with contact holes that provide electrical contact with an active area formed on the driving element's substrate; multiple separate channels between the source and the drain; and a gate electrode formed crossing the multiple channels. Also formed are dummy contact holes that allow the metal of the electrodes to penetrate to a layer below the active layer without contacting it. The dummy contact hole provides a thermally conductive channel whereby heat that would otherwise build up in the channels, and degrade the performance of the driving element, is conducted through the dummy contact hole and radiated away by the electrode metal.
    Type: Application
    Filed: May 18, 2009
    Publication date: September 17, 2009
    Inventor: Seok Woo Lee
  • Patent number: 7561093
    Abstract: An analog-to-digital (AD) converter and a voltage detecting device thereof are provided. The AD converter includes at least one voltage detecting device which outputs a signal of a frequency determined based on a magnitude of an input voltage using a resonance frequency of a resonator. The AD converter determines a digital output value depending on the output signal from the voltage detecting device. Therefore, the AD converter can achieve a high resolution and a high speed with far less power consumption.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: July 14, 2009
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Young-Tack Houng, Sang-Wook Kwon, In-Sang Song, Seung Seob Lee, Kangwon Lee, Seok Woo Lee, Phillip Lee
  • Patent number: 7551259
    Abstract: A method for fabricating a liquid crystal display (LCD) device includes providing a first substrate including a pixel portion and a circuit portion, the circuit portion having first and second regions; forming an active pattern and a first gate insulation film at the pixel portion and the circuit portion and forming a storage electrode on a portion of the active pattern of the pixel portion; forming a second gate insulation film on the first substrate; forming a gate electrode at the first region and forming p+ source and drain regions at portions of the active pattern of the first region; forming a gate electrode at the pixel portion and the second region, and forming a common line at the pixel portion; forming n+ source and drain regions at the pixel portion and at a portion of the active pattern of the second region; and joining the first and second substrates.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: June 23, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soo-Jeong Park, Young-Joo Kim, Seok-Woo Lee
  • Patent number: 7550331
    Abstract: A multi-channel type thin film transistor includes a gate electrode over a substrate extending along a first direction, a plurality of active layers parallel to and spaced apart from each other extending along a second direction crossing the first direction, and source and drain electrodes spaced apart from each other with respect to the gate electrode and extending along the first direction, wherein each of the plurality of active layers includes a channel region overlapped with the gate electrode, a source region, a drain region, and lightly doped drain (LDD) regions, one between the channel region and the source region and another one between the channel region and the drain region, wherein the LDD regions of the adjacent active layers have different lengths from each other.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: June 23, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Seok-Woo Lee, Jae-Sung Yu
  • Publication number: 20090153763
    Abstract: A thin film transistor including: an active layer on a substrate, the active layer having at least two unit channels; and source and drain electrodes on the active layer, wherein an interval D between each of the channels is larger than a unit channel width W.
    Type: Application
    Filed: February 6, 2009
    Publication date: June 18, 2009
    Inventor: Seok Woo Lee
  • Patent number: 7547919
    Abstract: A polysilicon liquid crystal display (LCD) device having a large width channel includes a buffer layer formed on a substrate, an active layer formed on the buffer layer and having a plurality of heat releasing parts, a gate line formed in a width direction of the active layer, at least one heat releasing path formed in each of the plurality of heat releasing parts, source and drain electrodes symmetrically formed at both sides of the active layer, and a contact hole connecting the source and drain electrodes and the active layer.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: June 16, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Seok-Woo Lee