Patents by Inventor Won Yong Lee

Won Yong 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).

  • Publication number: 20110081587
    Abstract: Provided is an apparatus for detecting leak in fuel cells. The apparatus includes: a detection gas intake unit connected to a detection gas storage; a supply unit supplying detection gas to supply manifolds of the fuel cells; a recovering unit connected to exhaust manifolds of the fuel cells; and a measuring unit measuring pressure of the detection gas supplied to the fuel cells, wherein in the fuel cells, a product and cooling fluid are exhausted through the exhaust manifolds after cathode/anode reaction gas and cooling fluid are supplied to the inside through the supply manifolds to generate an electrochemical reaction. Accordingly, presence of leak and leaked portions of the entire fuel cells are detected by using an inert detection gas.
    Type: Application
    Filed: August 27, 2010
    Publication date: April 7, 2011
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Gu-Gon Park, Minjin Kim, Young-Jun Sohn, Young-Woo Choi, Seok-Hee Park, Sung-Dae Yim, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, Chang-Soo Kim
  • Patent number: 7913572
    Abstract: Disclosed is an integrated multi-measurement system for measuring physical properties including thickness, electrical resistance and differential pressure of a gas diffusion layer for a polymer electrolyte fuel cell with respect to compression. The integrated multi-measurement system simultaneously measures changes in the physical properties of the gas diffusion layer depending on pressure upon measurement of the physical properties of the gas diffusion layer of the fuel cell and also measures through-plane permeability in which a gas is passed through a sample in a direction perpendicular to the sample and in-plane permeability in which a gas is passed through a sample in a direction parallel to the sample.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: March 29, 2011
    Assignee: Korea Institute of Energy Research
    Inventors: Gu-Gon Park, Jin-Soo Park, Min-Jin Kim, Young-Jun Sohn, Seok-Hee Park, Sung-Dae Yim, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, Chang-Soo Kim
  • Publication number: 20110059387
    Abstract: A highly proton conductive polymer electrolyte composite membrane for a fuel cell is provided. The composite membrane includes crosslinked polyvinylsulfonic acid. The composite membrane is produced by impregnating a mixed solution of vinylsulfonic acid as a monomer, a hydroxyl group-containing bisacrylamide as a crosslinking agent and a photoinitiator or thermal initiator into a microporous polymer support, polymerizing the monomer, and simultaneously thermal-crosslinking or photo-crosslinking the polymer to form a chemically crosslinked polymer electrolyte membrane which is also physically crosslinked with the porous support. Further provided is a method for producing the composite membrane in a simple manner at low cost as well as a fuel cell using the composite membrane.
    Type: Application
    Filed: December 23, 2008
    Publication date: March 10, 2011
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Young Woo Choi, Jin Soo Park, Chang Soo Kim, Gu Gon Park, Seok Hee Park, Sung Dae Lim, Tae Hyun Yang, Young Gi Yoon, Min Jin Kim, Kyoung Youn Kim, Young Jun Sohn, Won Yong Lee
  • Publication number: 20110053030
    Abstract: Provided are a fuel cell with a porous gas diffusion layer having a flow channel and a method for manufacturing the same. A metal separator without a flow channel is used, but a flow channel for providing a reaction gas is formed in a gas diffusion layer made of a porous material. This improves precision of stack manufacturing and allows free design of the cooling part. The gas diffusion layer is made of a porous metal material so as to maximize electrical transfer efficiency and improve endurance against physical stress.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 3, 2011
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Young-Jun Sohn, Minjin Kim, Gu-Gon Park, Seok-Hee Park, Sung-Dae Yim, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, Chang-Soo Kim
  • Publication number: 20110001934
    Abstract: An illumination optical unit and a display apparatus having the same are provided. The display apparatus includes an illumination optical unit which generates and illuminates light; a display element which forms an image by the light illuminated from the illumination optical unit; and a projection optical unit which projects the image formed in the display element on a screen. The illumination optical unit includes a light source which includes a light emitting area, and a polarization converting unit which includes a plurality of polarization prisms which polarize and convert an entering light from the light source. The light source is disposed so that a long width of the light emitting area corresponds to a long width of the polarization prisms.
    Type: Application
    Filed: February 18, 2010
    Publication date: January 6, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seok-chan HONG, Won-yong LEE, Joon-seok MOON
  • Publication number: 20110001936
    Abstract: An optical system is provided. The optical system includes a luminous system which comprises a plurality of light source devices and an image unit; and a projection system which receives light having an image through the luminous system, and enlarges and projects the light, wherein the plurality of light source devices comprise a reflection member which reflects light beam emitted from the light source devices, and are disposed so that the light beam emitted from the light source devices is reflected by the reflection member one time and enters to the image unit.
    Type: Application
    Filed: November 16, 2009
    Publication date: January 6, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jae-hyun PARK, Jeong-ho NHO, Sung-tae KIM, Won-yong LEE, Yong-Dok CHA
  • Patent number: 7828448
    Abstract: An illumination unit and an image projection apparatus employing the same. The illumination unit includes: a first reflective surface reflecting light incident thereon; a light-emitting device generating and emitting illuminating light; and a second reflective surface reflecting light emitted from the light-emitting device to a light source surface that includes the light-emitting device.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 9, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-hoi Kim, Won-yong Lee, Young-chol Lee, Kye-hoon Lee
  • Publication number: 20100123848
    Abstract: A light emitting diode (LED) module includes a plurality of LEDs which emit light, and a metal substrate on which the LEDs are mounted and which includes a fixing part to be directly fixed to an outer frame, wherein the metal substrate is a heat sink that absorbs heat generated by the LEDs.
    Type: Application
    Filed: June 29, 2009
    Publication date: May 20, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Boing-jo KANG, Kyoung-choul JANG, Won-yong LEE, Sang-ik KIM
  • Patent number: 7568805
    Abstract: An illumination unit includes multiple light source units to emit light having different wavelengths, and a synthesizing prism to synthesize the emitted light. The synthesizing prism includes a first triangular prism (tp) having a first outer surface (os) to transmit (reflect) the light according to the light's input a direction, and first and second boundary surfaces (bs), a second tp having a second os to transmit the light, a third bs facing the second bs, and a fourth bs, a third tp having a third os to transmit (reflect) the light according the light's input direction, a fifth bs facing the fourth bs, and a sixth bs facing the first bs, and a color separation portion arranged at least one of positions between the second and third bs, the fourth and fifth bs, and the sixth and first bs, to selectively transmit (reflect) the light according to wavelengths thereof.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: August 4, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kye-hoon Lee, Won-yong Lee, Young-chol Lee, Kirill Sokolov
  • Patent number: 7448758
    Abstract: An illumination unit includes first, second, third, and fourth light source units to emit first, second, third, and fourth light beams of different wavelength bands, and a hexahedral color synthesis prism to synthesize the first, second, third, and fourth light beams emitted from the first, second, third, and fourth light source units to propagate the first, second, third, and fourth light beams can propagate along the same path with respect to each other.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: November 11, 2008
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jong-hoi Kim, Young-chol Lee, Kye-hoon Lee, Won-yong Lee
  • Publication number: 20080252299
    Abstract: The present invention provides a cell or stack for evaluating the performance of a fuel cell and a method of evaluating the performance of the fuel cell using the cell or stack, in which a semiconductor thermoelectric device, attached to the side surface of the unit cell or stack of the fuel cell, is provided so as to evaluate the performance of the fuel cell in an environment in which temperature is maintained at a uniform temperature. According to the present invention, the temperatures of an anode and a cathode of the fuel cell can be precisely changed or maintained. Further, the performance of the fuel cell can also be measured in sub-zero temperature conditions without requiring a separate environmental chamber. A rate of temperature decrease, at which the temperature decreases to a certain sub-zero temperature, or a rate of temperature increase can be precisely controlled.
    Type: Application
    Filed: July 9, 2007
    Publication date: October 16, 2008
    Inventors: Gu-Gon Park, Jin-Soo Park, Min-Jin Kim, Young-Jun Sohn, Seok-Hee Park, Sung-Dae Yim, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, Chang-Soo Kim
  • Patent number: 7331694
    Abstract: An illuminating unit having a plurality of light emitting devices and collimators and a projection type image display apparatus using the same are provided. The illuminating unit includes: a plurality of light emitting devices which output light beams of predetermined wavelengths; a plurality of collimators, each having a parabolic reflection surface for reflecting the light beam in a predetermined direction, a mounting section for locating the light emitting device at the focal point of the parabolic reflection surface, a light output surface opposite to the parabolic reflection surface, and a light guide section for guiding the light beam reflected from the parabolic reflection surface to the light output surface; and one or more fixing members having two or more steps for mounting the light emitting devices and the collimators on their top surface. A plurality of light emitting devices and collimators are efficiently arranged in a small space.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: February 19, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kye-hoon Lee, Won-yong Lee, Young-chol Lee
  • Patent number: 7331680
    Abstract: An illumination unit with an improved color synthesis prism, which can synthesize light beams emitted from compact light sources, and a projection type image display apparatus employing the illumination unit.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: February 19, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kye-hoon Lee, Young-chol Lee, Won-yong Lee
  • Patent number: 7306352
    Abstract: An illuminator includes a concave mirror to reflect incident light in a predetermined direction, an inner reflective mirror provided on an optical axis of the concave mirror and having a reflective surface at least one surface thereof, a light source installed on at least one surface of the inner reflective mirror to generate and illuminate light, and a retro-reflective mirror provided at a focal point of the light reflected from the concave mirror, or in a vicinity of the focal point, and having an aperture through which some of the light illuminated from the light source and reflected by the concave mirror passes and a retro-reflective surface to reflect remaining light not passing through the aperture back toward the concave mirror.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: December 11, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kirill Sokolov, Alexel Borodouline, Young-chol Lee, Won-yong Lee
  • Patent number: 7267441
    Abstract: A projection display including first through third light source units to radiate first through third light beams having different colors, respectively, a light path combining unit to combine paths of the first through third light beams, an optical modulator to sequentially modulate the first through third light beams according to image information, and a projection lens unit to magnify and project the modulated light beams onto a screen. The light path combining unit includes first and second prisms. The first prism includes first and second incidence surfaces, through which the first and second light beams are incident, respectively, a first emission surface, and a first selective reflection surface to transmit the second light beam toward the first emission surface.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 11, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-chol Lee, Won-yong Lee, Kirill Sokolov, Kye-hoon Lee
  • Patent number: 7267446
    Abstract: A projection display includes first through third light source units to radiate first through third light beams, respectively, having different colors, an X-cube prism to combine paths of the first through third light beams, an optical modulator to sequentially modulate the first through third light beams according to image information, and a projection lens unit to magnify and project the modulated light beams onto a screen. Each of the first through third light source units includes at least one optical module. The optical module includes a collimator having a first reflective surface in a parabolic shape, and a compact light source located in the vicinity of a focal point of the first reflective surface.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 11, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-chol Lee, Won-yong Lee, Kirill Sokolov, Kye-hoon Lee
  • Publication number: 20070128751
    Abstract: A display device having a uniform brightness and control method thereof are provided, which includes a circuit board having a light emitting diode mounting area, a light source unit comprising a plurality of light emitting diodes mounted to the light emitting diode mounting area so that light emitting characteristics can be symmetrical around the center of the light emitting diode mounting area, a light uniformizing unit for creating a uniform light from the light emitting diodes, a micro display unit located in front of the light uniformizing unit, a projection lens unit located in front of the micro display unit, and a screen located in front of the projection lens unit. Thus, the display device provides uniform brightness and color.
    Type: Application
    Filed: October 20, 2006
    Publication date: June 7, 2007
    Inventors: Kye-hoon Lee, Won-yong Lee, Byung-jo Kang
  • Patent number: 7210788
    Abstract: A color prism capable of separating incident light into four color beams and synthesizing incident four-color beams, and a projection-type image display apparatus employing the color prism. The color prism includes: first through third triangular prisms each having two boundary surfaces which face the other two triangular prisms, and an outer surface which transmits or reflects incident light according to an incidence angle of the light; and first through third dichroic filters respectively interposed among the first through third triangular prisms and selectively transmits or reflects incident light according to wavelength so as to separate incident light into first through fourth light beams according to wavelength ranges and synthesize incident first through fourth light beams.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: May 1, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kye-hoon Lee, Young-chol Lee, Won-yong Lee
  • Patent number: 7182497
    Abstract: An illumination unit is provided which includes a glass rod including a parabolic reflection surface, a light incident surface facing the parabolic reflection surface, a concave portion formed inwardly in the light incident surface at a position of a focal point of the parabolic reflection surface, and a light guide portion facing the parabolic reflection surface and having a rectangular section. An LED module is disposed at the focal point of the parabolic reflection surface and emitting light to the parabolic reflection surface through the concave portion. A surface of the light guide portion parallel to the light incident surface is stepped from the light incident surface in a direction in which the rectangular section of the light guide portion decreases.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: February 27, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kye-hoon Lee, Young-chol Lee, Won-yong Lee
  • Publication number: 20060274278
    Abstract: An illumination system and a projection system capable of enhancing light efficiency and contrast. The projection system includes a display panel from which light incident to a projection lens unit is controlled according to the rotation of a plurality of micromirrors and an asymmetric stop which adjusts an angle of effective light incident from the display panel. The illumination system emitting light to the projection system includes: one or more light source units each including a single or an array of light emitting devices and having a light exit surface with an aspect ratio different from an aspect ratio of the display panel; and an aspect ratio adjusting unit adjusting the aspect ratio of the light such that the aspect ratio of the light exit surface of each of the light source units can be equal to the aspect ratio of the display panel.
    Type: Application
    Filed: January 20, 2006
    Publication date: December 7, 2006
    Inventors: Kye-hoon Lee, Won-yong Lee, Jong-hoi Kim