Patents by Inventor Woong-Jae Chang

Woong-Jae Chang 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: 8135292
    Abstract: A fixing device includes a pressing member, a belt member which rotates in contact with the pressing member and forms a nip with the pressing member, a first roller member and a second roller member to guide a rotation of the belt member, and a heating member which is mounted in one of the first roller member or the second roller member to heat the belt member, the heating member including at least two heaters to respectively heat at least two areas on the belt member corresponding to at least two width dimensions substantially parallel to a rotational axis of the one of the first roller member and the second roller member, and a sensor member to control a temperature of the belt member. The heating member includes a first heater to heat a central portion of the one of the first roller member and the second roller member, and a second heater to heat opposite ends of the one of the first roller member and the second roller member.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: March 13, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woong-jae Chang
  • Patent number: 8072556
    Abstract: A liquid crystal display which includes a liquid crystal panel which displays an image, a middle frame in which the liquid crystal panel is positioned, an upper container which is disposed above the middle frame and includes the liquid crystal panel therein along with the middle frame, a lower container which has a bottom surface and a plurality of sidewalls that surround the bottom surface, is disposed below the middle frame and is coupled to the upper container, and at least one connection element which is disposed between the upper container and one of the sidewalls of the lower container and connects the lower container and the upper container.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: December 6, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon-soo Kwon, Jung-tae Kang, Jin-ho Ha, Woong-jae Chang
  • Patent number: 8066394
    Abstract: A backlight assembly includes a plurality of lamps, a receiving container and a conductive member. Each of the lamps includes a lamp body, a first electrode part disposed at a first end portion of the lamp body and a second electrode part disposed at a second end portion of the lamp body, the second end portion being opposite to the first end portion. The receiving container includes a bottom plate on which the lamps are disposed and a sidewall disposed at edge portions of the bottom plate to define a receiving space. The receiving container has a plurality of grounding portions formed on the bottom plate or the sidewalls. The conductive member electrically connects the second electrode part to one of the grounding portions.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: November 29, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Ju Kim, Min-Ho Ok, Yoon-Soo Kwon, Jung-Tae Kang, Sang-Hoon Park, Jin-Ho Ha, Woong-Jae Chang
  • Patent number: 7953348
    Abstract: A fusing device of an image forming apparatus which applies principles of leverage, and an image forming apparatus containing such a device. The fusing device includes a fusing unit having a heating roller and a pressure roller facing each other and which rotate together, a cover which opens and closes the fusing unit, and a pressure and release unit, one end of which is rotatably fixed to a rotating shaft, the pressure and release unit containing a member having a pressuring unit which pressures the pressure roller towards the heating roller when the cover opens and shuts, and a pressured part, which is farther from the rotating shaft than the pressuring part and which receives pressure from the cover.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 31, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woong-jae Chang, Sea-chul Bae
  • Patent number: 7920221
    Abstract: A backlight assembly which includes a first mold comprising a frame including a plurality of side portions defining an opening; and a light source disposed in the opening, wherein an external surface of the side portions includes a reverse-inclined surface extending downwardly and inwardly from an upper portion of the external surface and a width of the side portions is smaller at the upper portion and becomes larger downwardly.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: April 5, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woong-jae Chang
  • Publication number: 20110002113
    Abstract: A backlight assembly includes a plurality of lamps, a receiving container and a conductive member. Each of the lamps includes a lamp body, a first electrode part disposed at a first end portion of the lamp body and a second electrode part disposed at a second end portion of the lamp body, the second end portion being opposite to the first end portion. The receiving container includes a bottom plate on which the lamps are disposed and a sidewall disposed at edge portions of the bottom plate to define a receiving space. The receiving container has a plurality of grounding portions formed on the bottom plate or the sidewalls. The conductive member electrically connects the second electrode part to one of the grounding portions.
    Type: Application
    Filed: August 24, 2010
    Publication date: January 6, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Won-Ju Kim, Min-Ho Ok, Yoon-Soo Kwon, Jung-Tae Kang, Sang-Hoon Park, Jin-Ho Ha, Woong-Jae Chang
  • Patent number: 7806544
    Abstract: A backlight assembly includes a plurality of lamps, a receiving container and a conductive member. Each of the lamps includes a lamp body, a first electrode part disposed at a first end portion of the lamp body and a second electrode part disposed at a second end portion of the lamp body, the second end portion being opposite to the first end portion. The receiving container includes a bottom plate on which the lamps are disposed and a sidewall disposed at edge portions of the bottom plate to define a receiving space. The receiving container has a plurality of grounding portions formed on the bottom plate or the sidewalls. The conductive member electrically connects the second electrode part to one of the grounding portions.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: October 5, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Ju Kim, Min-Ho Ok, Yoon-Soo Kwon, Jung-Tae Kang, Sang-Hoon Park, Jin-Ho Ha, Woong-Jae Chang
  • Patent number: 7758233
    Abstract: A lamp assembly includes a lamp housing for housing one or more predefined tubular lamps and at least a first lamp socket for coupling to and removably retaining respective first electrodes of the one or more lamps and for further coupling an integral conduction path of the lamp housing to at least one of the first electrodes.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: July 20, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woong-Jae Chang, Jung-Tae Kang, Joo-Yeon Won
  • Patent number: 7718141
    Abstract: An automatic VOC concentration control apparatus is capable of adjusting the concentration of VOC in a catalytic device under a predetermined value. The automatic VOC concentration control apparatus includes a housing having an inlet port and an outlet port for introducing and discharging VOC vapor, respectively, one or more cooling tubes for cooling the VOC vapor introduced through the inlet port, and one or more porous members for holding droplets of VOC liquid thereon as the VOC vapor is condensed into liquid.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: May 18, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woong-jae Chang
  • Patent number: 7714952
    Abstract: A backlight assembly capable of reducing a frame size, and a liquid crystal display (LCD) apparatus having the backlight assembly is provided. The backlight assembly includes a bottom chassis having a receiving space, a lamp unit disposed at an edge portion of the receiving space, a light-guide plate disposed on the receiving space and an optical sheet. The lamp unit includes a light-emitting lamp a lamp cover covering a portion of the lamp and a sheet-fixing part that protrudes in an upward direction. The light-guide plate guides light from the lamp unit toward an upward direction. The optical sheet includes a fixing hole in which the sheet-fixing part is be inserted.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: May 11, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woong-Jae Chang
  • Patent number: 7637765
    Abstract: A lamp socket includes a socket body, a power supplying member and a socket cover. The socket body has a connecting hole formed in the socket body. The connecting hole is opened. The power supplying member is disposed in the connecting hole and an electrode supporting terminal having a supporting groove, so that supports an electrode portion of a lamp disposed in the power supplying member. The socket cover is partially and separably insertable in the connecting hole, to fix the electrode portion of the lamp. A backlight assembly includes a receiving container, a plurality of lamps and lamp sockets.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 29, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woong-Jae Chang, Jung-Tae Kang, Jin-Ho Ha, Yoon-Soo Kwon
  • Publication number: 20090128731
    Abstract: A liquid crystal display which includes a liquid crystal panel which displays an image, a middle frame in which the liquid crystal panel is positioned, an upper container which is disposed above the middle frame and includes the liquid crystal panel therein along with the middle frame, a lower container which has a bottom surface and a plurality of sidewalls that surround the bottom surface, is disposed below the middle frame and is coupled to the upper container, and at least one connection element which is disposed between the upper container and one of the sidewalls of the lower container and connects the lower container and the upper container.
    Type: Application
    Filed: June 2, 2008
    Publication date: May 21, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yoon-soo Kwon, Jung-tae Kang, Jin-ho Ha, Woong-jae Chang
  • Patent number: 7527406
    Abstract: A backlight assembly includes a receiving container, a first side mold, a printed circuit board and a plurality of lamps. The first side mold is on the side of the receiving container. The printed circuit board is combined with the first side mold, the printed circuit board including a plurality of conductive clips and a power supply line assembly for transmitting a lamp driving electric power. The lamps are combined with the conductive clips to generate light based on the lamp driving electric power. The power supply line assembly includes a first conductive line electrically connected to a subgroup of conductive clips and a second conductive line electrically connected to the other conductive clips. The first and second conductive lines are supplied with the lamp driving electric powers that have reverse phases to each other. Therefore, noise is decreased according to its waterfall curve to improve an image display quality.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: May 5, 2009
    Assignee: Samsung Electronics, Co., Ltd.
    Inventors: Yoon-Soo Kwon, Jung-Tae Kang, Sang-Hoon Park, Jin-Ho Ha, Woong-Jae Chang
  • Patent number: 7493076
    Abstract: A paper-discharging guide unit for guiding a printing paper to be discharged outside a wet electrophotographic image forming apparatus and for absorbing volatile organic compound gases soaked in the printing paper comprises a guide frame forming a discharge passage for the printing paper, a plurality of guide ribs formed in pairs of slanted lines symmetrical with respect to a centerline of the discharge direction of the printing paper of the guide frame inside the guide frame and guiding the printing paper, and an air-absorbing portion disposed below the guide frame and absorbing air from a plurality of spaces between the guide frame and the plurality of guide ribs.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: February 17, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woong-Jae Chang
  • Publication number: 20080304848
    Abstract: A fixing device includes a pressing member, a belt member which rotates in contact with the pressing member and forms a nip with the pressing member, a first roller member and a second roller member to guide a rotation of the belt member, and a heating member which is mounted in one of the first roller member or the second roller member to heat the belt member, the heating member including at least two heaters to respectively heat at least two areas on the belt member corresponding to at least two width dimensions substantially parallel to a rotational axis of the one of the first roller member and the second roller member, and a sensor member to control a temperature of the belt member. The heating member includes a first heater to heat a central portion of the one of the first roller member and the second roller member, and a second heater to heat opposite ends of the one of the first roller member and the second roller member.
    Type: Application
    Filed: January 25, 2008
    Publication date: December 11, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Woong-jae CHANG
  • Publication number: 20080252808
    Abstract: A backlight assembly which includes a light source and a first mold receiving the light source, the first mold comprising a frame having a plurality of side walls defining an open interior portion. At least one side portion, an external surface of a side wall of the first mold has at least one reverse-inclined surface extending downwardly at an angle toward the interior side of the side wall.
    Type: Application
    Filed: July 13, 2007
    Publication date: October 16, 2008
    Inventor: Woong-jae Chang
  • Publication number: 20080124146
    Abstract: An image forming apparatus includes a fixing belt which is rotatably mounted, a support roller which is in contact with an inner surface of the fixing belt to support the fixing belt, a press member which pressurizes a portion of the fixing belt toward a paper, and a press roller which is in pressure contact with the support roller and the press member, the fixing belt being positioned between the press roller and the support roller and between the press roller and the press member. At least one of the support roller and the press roller has a concave shape such that a diameter of both ends of the at least one of the support roller and the press roller is larger than a diameter of a middle portion, and the press member is formed with a curved portion which is convexly formed at a middle portion of the at least one of the support roller and the press roller.
    Type: Application
    Filed: June 12, 2007
    Publication date: May 29, 2008
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Sea Chul BAE, Woong Jae Chang
  • Patent number: 7377677
    Abstract: A backlight assembly with excellent light efficiency and a display device provided with the backlight assembly is provided where the backlight assembly includes a plurality of light sources longitudinally arranged in parallel to each other, and a fixing member receiving the plurality of light sources. When a display area, formed by light emitted from the plurality of light sources, is divided by the plurality of light sources into a plurality of display area sections, an average area of the display area sections between light sources adjacent to each other is less than or equal to an area of a display area section between an edge of the display area and the light source most adjacent thereto.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: May 27, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Tae Kang, Yoon-Soo Kwon, Woong-Jae Chang
  • Publication number: 20080106900
    Abstract: A lamp socket includes a socket body, a power supplying member and a socket cover. The socket body has a connecting hole formed in the socket body. The connecting hole is opened. The power supplying member is disposed in the connecting hole and an electrode supporting terminal having a supporting groove, so that supports an electrode portion of a lamp disposed in the power supplying member. The socket cover is partially and separably insertable in the connecting hole, to fix the electrode portion of the lamp. A backlight assembly includes a receiving container, a plurality of lamps and lamp sockets.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 8, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woong-Jae Chang, Jung-Tae Kang, Jin-Ho Ha, Yoon-Soo Kwon
  • Publication number: 20080069589
    Abstract: A fusing device of an image forming apparatus which applies principles of leverage, and an image forming apparatus containing such a device. The fusing device includes a fusing unit having a heating roller and a pressure roller facing each other and which rotate together, a cover which opens and closes the fusing unit, and a pressure and release unit, one end of which is rotatably fixed to a rotating shaft, the pressure and release unit containing a member having a pressuring unit which pressures the pressure roller towards the heating roller when the cover opens and shuts, and a pressured part, which is farther from the rotating shaft than the pressuring part and which receives pressure from the cover.
    Type: Application
    Filed: April 17, 2007
    Publication date: March 20, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Woong-jae CHANG, Sea-chul Bae