Patents by Inventor Doo Lee

Doo 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).

  • HIGH VOLTAGE DIRECT CURRENT POWER INCREASE CONTROLLER AND HVDC SYSTEM INCLUDING THE SAME
    Publication number: 20170155248
    Abstract: An HVDC power increase controller includes a command output unit for outputting a current command value according to a disturbance signal to a main controller; a voltage drop determiner receiving an alternating current (AC) voltage and comparing a level of the AC voltage to a lowest level of a voltage causing a rectification failure; and a power tracking determiner receiving a direct current (DC) power and comparing a level of the DC power to an estimated power level corresponding to the current command value. The command output unit adjusts the current command value according to a comparison result of the voltage drop determiner and the power tracking determiner.
    Type: Application
    Filed: November 23, 2016
    Publication date: June 1, 2017
    Inventors: Seong Doo LEE, Soon Ho CHOI, Chan Ki KIM
  • VERTICAL-TYPE ORGANIC LIGHT-EMITTING TRANSISTORS WITH REDUCED LEAKAGE CURRENT AND METHOD FOR FABRICATING THE SAME
    Publication number: 20170110691
    Abstract: A vertical-type organic light-emitting transistor for reducing the off-state leakage current to improve the current and on-off ratio includes a gate electrode, a lower semiconductor layer disposed on the gate electrode, a source electrode disposed on the lower semiconductor layer, and a source insulation film disposed on the source electrode and covering top and sides of the source electrode, wherein the lower semiconductor layer is configured such that an electric charge is injected into the lower semiconductor layer from the source electrode when voltage is applied to the gate electrode.
    Type: Application
    Filed: April 19, 2016
    Publication date: April 20, 2017
    Inventors: Sin-Doo LEE, In-Ho LEE, Gyujeong LEE
  • Display device
    Patent number: 9625946
    Abstract: Provided is a display device, including a flexible display panel; and a first roller connected to the display panel and having an outer surface, the first roller winding the flexible display panel on the outer surface, the first roller winding both in a first rotating direction and in a second rotating direction opposite to the first direction.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: April 18, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung Hun Lee, Youn Joon Kim, Cheol Su Kim, Yoon Jee Shin, Sang Jo Lee, Jang Doo Lee, Ju Suck Lee, Kyung Min Choi
  • DISPLAY DEVICE AND DRIVING METHOD THEREOF SUPPRESSING POWER VOLTAGE RIPPLES
    Publication number: 20160365019
    Abstract: A display device and a driving method thereof can reduce or prevent deterioration of image quality caused by ripples of a power voltage. A display device includes a gamma reference voltage generator generating a plurality of gamma reference voltages using a power voltage. A gamma selection signal generator generates a gamma selection signal corresponding to at least one gamma reference voltage among the gamma reference voltages and the power voltage. A gamma data supply unit stores a plurality of gamma data sets and outputs a gamma data set corresponding to the gamma selection signal from among the gamma data sets. A data driver generates a data signal using the gamma data set supplied from the gamma data supply unit and the gamma reference voltages. A display unit includes data lines transmitting the data signal.
    Type: Application
    Filed: January 19, 2016
    Publication date: December 15, 2016
    Inventors: JEONG DOO LEE, MIN YOUNG PARK, Kl HYUN PYUN
  • PET nonwoven fabric for separator for secondary battery and separator for secondary battery comprising the same
    Patent number: 9508974
    Abstract: A PET nonwoven fabric for a separator for a secondary battery includes first fibers composed of PET having a melting temperature of 240° C. or more and second fibers composed of PET having a melting temperature of 180˜220° C., respective fibers having two types of fibers having different diameters, and has a fine pore size and uniform pore distribution and exhibits superior surface properties, low surface defects, high mechanical strength and excellent mass production. Even when the temperature of a battery is increased to 200° C. or more, the PET nonwoven fabric has heat resistance which prevents thermal runaway and does not generate melting and shrinking.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: November 29, 2016
    Assignee: TOPTEC HNS CO., LTD.
    Inventors: Hyang Doo Lee, Suk Hwa You, Chun Gi Kang, Seung Yong Jee, Do Hyeuk Hwang, Chang Gyu Ahn, Byoung Min Kwon, Hyun Sook Kim
  • Method for forming pattern arrays and organic devices including the pattern arrays
    Patent number: 9496497
    Abstract: The present invention includes forming a hydrophobic thin film on a substrate, removing a portion of the first hydrophobic thin film to form a first hydrophilic region, coating a first organic solution on the substrate and selectively wetting the first hydrophilic region, drying the first organic solution to form a first organic thin film pattern in the first hydrophilic region, forming a second hydrophobic thin film on the first organic thin film pattern, coating a second organic solution and selectively wetting the second organic solution, and drying the second organic solution to form a second organic thin film pattern.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: November 15, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sin-Doo Lee, Yu-Jin Na
  • PRINTED CIRCUIT BOARD, SEMICONDUCTOR PACKAGE AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20160300773
    Abstract: There is provided a printed circuit board includes a substrate having product areas for mounting elements and dummy areas disposed between two neighboring product areas, external connection terminals disposed on the product areas, and a plurality of dummy bumps disposed on the dummy areas.
    Type: Application
    Filed: March 4, 2016
    Publication date: October 13, 2016
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Young Doo LEE, Dae Chul CHOI
  • Spindle jig and auto pallet-changeable machining center having the same
    Patent number: 9415474
    Abstract: A spindle jig and a machining center having the same are disclosed. The machining center includes a spindle jig installed to be movable, a guide rail mounted to guide and move the spindle jig, a spindle that is fitted and supported on the spindle jig, and is equipped with a processing tool and rotates the processing tool, a column on which the spindle jig is mounted, an auto pallet changer equipped with materials, and transferring the materials to a processing area or a non-processing area, a splash guard rotated integrally with the auto pallet exchanger, mounted to be tiltable at a predetermined angle and separating the processing area from the non-processing area, and an upper cover installed to be rotatable on the movement path of the spindle jig along the guide rail. Accordingly, the replacement of the spindle can be quick and easy.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: August 16, 2016
    Assignee: Hyundai Motor Company
    Inventors: Nam-Doo Lee, Joo-OK Park, Heedong Son
  • ROLLABLE DISPLAY DEVICE
    Publication number: 20160163241
    Abstract: A rollable display device includes a flexible display panel displaying an image, a housing accommodating the flexible display panel in a rolled state, the housing having a bent opening portion through which the flexible display panel is pulled out, and a grip attached to the flexible display panel, the grip pulling the flexible display panel out of the housing by an external force.
    Type: Application
    Filed: July 1, 2015
    Publication date: June 9, 2016
    Inventors: Junghun LEE, Youn Joon KIM, Sangjo LEE, Jang Doo LEE, Jusuck LEE, Mi JANG, Kyungmin CHOI
  • FLEXIBLE DISPLAY
    Publication number: 20160161983
    Abstract: A flexible display is disclosed. In one aspect, the flexible display a flexible display panel includes a display area and a peripheral area located on opposing sides of the display area and a first fixing part located over an upper surface of the peripheral area of the flexible display panel. The first fixing part is configured to have a first restoring force that presses on the upper surface of the flexible display panel. The flexible display also includes a second fixing part located below a lower surface of the peripheral area of the flexible display panel. The second fixing part is configured to have a second restoring force that presses on the lower surface of the flexible display panel.
    Type: Application
    Filed: March 31, 2015
    Publication date: June 9, 2016
    Inventors: Jung Hun Lee, Sang Jo Lee, Jang Doo Lee, Ju Suck Lee, Kyung Min Choi, Won Suk Choi
  • DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME
    Publication number: 20160140905
    Abstract: A display device includes: a display panel including a plurality of pixels; and a controller configured to adjust a data signal applied to each of the plurality of pixels, and the plurality of pixels includes a plurality of pixel blocks, and the controller is configured to calculate a remaining lifespan of each of the plurality of pixel blocks and to adjust a maximum luminance of pixels between a first pixel block and a second pixel block based on a remaining lifespan of the first pixel block, by selecting the first pixel block and the second pixel block based on the remaining lifespan of each of the pixel blocks.
    Type: Application
    Filed: May 11, 2015
    Publication date: May 19, 2016
    Inventors: Myoung Hwan Yoo, Jang Doo Lee
  • APPARATUS FOR ACTIVATING MEMBRANE ELECTRODE ASSEMBLY FOR FUEL CELLS
    Publication number: 20160111745
    Abstract: An apparatus for activating a membrane electrode assembly (MEA) for fuel cells includes: a frame. A plurality of separation plates are disposed on an upper side of a base plate, which is disposed on a top portion of the frame, to move straightly in a length direction. The plurality of separation plates are spaced apart from each other with the MEA interposed therebetween in the direction in which the separation plates move. A tilt unit, which is connected to the frame and the base plate, upwardly tilt the base plate with respect to the frame and remove a coolant generated when the MEA is activated.
    Type: Application
    Filed: September 29, 2015
    Publication date: April 21, 2016
    Inventors: Nam Doo LEE, Ji Won YU
  • LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREOF
    Publication number: 20160086561
    Abstract: A liquid crystal display device, including a display panel including data lines and gate lines intersecting the data lines, a gate driver configured to sequentially apply a scan signal to the gate lines, a data driver configured to apply data voltages corresponding to each gate lines to the data lines, a timing controller configured to control the gate driver and the data driver, a power source supply circuit configured to supply a positive power source and a negative power source, a common voltage feedback circuit configured to receive the positive power source and the negative power source from the power source supply circuit, receive a reference voltage and a common voltage from the display panel, and output an amplified feedback signal corresponding to a voltage level difference between the reference voltage and the common voltage.
    Type: Application
    Filed: June 2, 2015
    Publication date: March 24, 2016
    Inventors: Yun-Mi KIM, Ki-Hyun Pyun, Sung-Jun Kim, Ju-Hyun Kim, Yong-Jae Lee, Jeong-Doo Lee, Kyung-Hwa Lim
  • MEMORY, DISPLAY DEVICE INCLUDING THE SAME, AND WRITING METHOD OF THE SAME
    Publication number: 20160078957
    Abstract: A memory is provided, which comprises an electrically erasable and programmable read only memory (EEPROM) configured to store an operation system and to be rewritable in response to a write operation signal, an address comparator configured to be connected to Inter Integrated Circuit (I2C) lines and output the write operation signal to the EEPROM in response to an external signal, a digital-to-analog converter (DAC) unit configured to determine whether to connect a DAC resistor and the I2C lines in response to the external signal and a pull-up resistor unit configured to be connected to the I2C lines.
    Type: Application
    Filed: March 17, 2015
    Publication date: March 17, 2016
    Inventors: Yun Mi KIM, Ki Hyun PYUN, Sung Jun KIM, Min Young PARK, Jeong Doo LEE, Kyung Hwa LIM
  • Organic light emitting diode display and method of driving the same
    Patent number: 9257069
    Abstract: A controller for a display panel may include a first supply circuit to output first and second driving voltages to a sub-pixel of a first color; and a second supply circuit to output third and fourth driving voltages to a sub-pixel of a second color. The first driving voltage may be greater than the second driving voltage, and the third driving voltage may be greater than the fourth driving voltage. Also, at least three of the first, second, third, and fourth driving voltages may be different from one another.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: February 9, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Leonid Kaplan, Heung-Yeol Na, Ho-Ryun Chung, Wang-Jo Lee, Jang-Doo Lee
  • DISPLAY DEVICE
    Publication number: 20160034000
    Abstract: Provided is a display device, including a flexible display panel; and a first roller connected to the display panel and having an outer surface, the first roller winding the flexible display panel on the outer surface, the first roller winding both in a first rotating direction and in a second rotating direction opposite to the first direction.
    Type: Application
    Filed: December 4, 2014
    Publication date: February 4, 2016
    Inventors: Jung Hun LEE, Youn Joon KIM, Cheol Su KIM, Yoon Jee SHIN, Sang Jo LEE, Jang Doo LEE, Ju Suck LEE, Kyung Min CHOI
  • VARIABLE GATE CLOCK GENERATOR, DISPLAY DEVICE INCLUDING THE SAME AND METHOD OF DRIVING DISPLAY DEVICE
    Publication number: 20160027387
    Abstract: A display device includes a display panel, a variable gate clock generator and a gate driver. The display panel includes a plurality of pixels coupled to a plurality of data lines and a plurality of gate lines, respectively. The variable gate clock generator generates a first variable gate clock signal and a second variable gate clock signal having respective duty ratios that are varied depending on a brightness of a frame image. The gate driver generates a plurality of gate driving signals for driving the gate lines in response to the first and second variable gate clock signals.
    Type: Application
    Filed: December 8, 2014
    Publication date: January 28, 2016
    Inventors: MIN-YOUNG PARK, JEON-DOO LEE, SUNG-JUN KIM, YUN-MI KIM, KYUNG-HWA LIM, KI-HYUN PYUN
  • METHOD OF EXTRACTING MINERAL SOMATID AND METHOD OF MANUFACTURING ADVANCED MULTIFUNCTIONAL MATERIAL USING THE SAME
    Publication number: 20150374753
    Abstract: A method of manufacturing a healing and multifunctional natural gel using mineral somatid quantum energy living bodies (QELBs). The composite material including mineral somatid is produced by separating mineral somatid from the mineral, culturing the separated mineral somatid, and combining the cultured mineral somatid with powder. The composite material is harmless, has no biological side effects, has multiple functions including cancer suppression, immune enhancement, skin reconstruction, self-heating, cold activeness, VOC deodorization and harmful electromagnetic radiation shielding and absorption, and serves to increase flavor and beneficial components by promoting fermentation and ripening.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 31, 2015
    Inventor: jong doo LEE
  • HYBRID NONWOVEN SEPARATOR HAVING INVERTED STRUCTURE
    Publication number: 20150372273
    Abstract: A hybrid nonwoven separator having an inverted structure includes a nanofiber layer; and a substrate layer composed of a nonwoven fabric provided on both surfaces of the nanofiber layer to form an outermost layer. Because this separator is configured such that the substrate layer having a comparatively low coefficient of friction is disposed as the outermost layer thereof, structural defects generable in the course of manufacturing a separator can be prevented, thermal deformation of the nanofiber layer of the separator can be blocked, and also closure of pores of the nanofiber layer can be prevented thanks to pre-filtering, thus remarkably extending the lifespan of the separator.
    Type: Application
    Filed: February 18, 2013
    Publication date: December 24, 2015
    Inventor: Hyang Doo LEE
  • SEPARATOR HAVING HIGH ELECTROLYTE WETTABILITY FOR SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20150325829
    Abstract: Provided is a separator having high wettability for a secondary battery, including a polyolefin substrate, a nanofiber hot melt layer formed on one or both surfaces of the substrate, and a nanofiber electrolyte wetting layer formed on the hot melt layer, wherein the hot melt layer is applied in an amount of 0.05˜2.5 g/m2, and the electrolyte wetting layer has a porosity of 55˜89%. The separator according to the current invention has superior heat resistance and high mechanical strength and can exhibit a shutdown function, and has superior porosity and pore size so as to be adapted for a separator for a secondary battery, thereby manifesting high ionic conductivity and preventing battery performance from deteriorating.
    Type: Application
    Filed: February 18, 2013
    Publication date: November 12, 2015
    Inventor: Hyang Doo LEE