Patents by Inventor Joo-woan Cho

Joo-woan Cho 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: 8197113
    Abstract: Provided is a display device for an embodiment in which a central axis of a light guide plate (LGP) and a central axis of one or more light sources are matched with each other to maximize efficiency of the light sources, and which has an ultra-slim structure. The display device may include: a display panel which displays an image; an LGP which guides light to the display panel; light sources which are disposed on a side of the LGP and provide light to the LGP; a circuit board which is disposed on a side of the display panel with the light sources mounted on a surface thereof, and driving chips which drive the display panel mounted on an opposite surface thereof; and a frame which houses the LGP and the light sources and on which the circuit board and the display panel are mounted.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se-Ki Park, Joo-Woan Cho, Sung-Kyu Shim, Young-Keun Lee
  • Patent number: 8197082
    Abstract: The present invention relates to a backlight unit with a light emitting diode block assembly connected thereto, and a liquid crystal display having the backlight unit. In one embodiment, the backlight unit includes a plurality of light source blocks each of which includes a substrate having a light source and an electrode portion formed thereon; a connector electrically connecting the light source blocks to each other, coupled to the light source blocks in contact with one side of the connector, and fastening the light source blocks to each other by cross-coupling the light source blocks; and a supporter disposed on the other side of the connector. In this manner, LED blocks can be simultaneously both electrically and mechanically coupled, using a relatively small and simple number of connectors, facilitating reliability and ease of manufacture.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-Sik Choi, Byung-Choon Yang
  • Patent number: 8167477
    Abstract: A lamp socket includes a body receiving a lamp, and a power supplying member disposed inside the body, the power supplying member a conductive elastomer, the power supplying member electrically interconnecting the lamp and an inverter substrate on which an inverter is mounted. The power supplying member includes a lamp connector receiving a lead wire of the lamp, and an inverter connector formed integrally with the lamp connector, wherein the inverter connector receives a protrusion of the inverter substrate to encircle the protrusion.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 1, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Du-Hwan Chung, Joo-Woan Cho, Seong-Sik Choi, Yong-Woo Lee, Hyun-Chul Bae, Cheol-Yong Noh
  • Patent number: 8162674
    Abstract: A backlight assembly includes a first substrate, a first electrode disposed on the first substrate, a second substrate disposed opposite to the first substrate, and a connector. The connector is disposed on the second substrate and includes a second electrode connected to the first electrode, and an elastic member which applies a force to the second electrode. The connector increases a contact force between the first electrode and the second electrode by applying the force to the second electrode.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: April 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-Sik Choi, Yong-Woo Lee
  • Publication number: 20120081925
    Abstract: A display apparatus includes a light source unit, a supporter, a light guide plate, and a display panel. The light source unit includes a substrate and a plurality of light sources disposed on a front surface of the substrate to emit a light. The supporter supports the light source unit. The light guide plate includes a light incident surface facing the front surface of the substrate, to which the light is incident, and a light exiting surface from which the light exits. The display panel receives the light from the light guide plate to display an image.
    Type: Application
    Filed: July 27, 2011
    Publication date: April 5, 2012
    Inventors: Joo Woan CHO, Seongsik Choi, YongWoo Lee
  • Patent number: 8142065
    Abstract: A backlight assembly includes at least one light-generating board, a light source driving board and a coupling board. The light-generating board generates light. The light source driving board provides control signals to the light-generating board. The coupling board is coupled via slot connectors to the light-generating board and the light source driving board to electrically connect the light-generating board and the light source driving board to each other. Thus, manufacturing efficiency may be improved in comparison with electrically connecting the light-generating board and the light source driving board through wires.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: March 27, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Du-Hwan Chung, Byung-Choon Yang
  • Patent number: 8061862
    Abstract: Provided is a backlight assembly which includes integral power supply sockets and ground sockets, in which the number of parts is reduced in addition to the manufacturing cost. The backlight assembly includes a lamp including a lamp tube and an electrode that protrudes beyond either end of the lamp tube, a power supply socket including a first plate that has a first guide groove through which the electrode is inserted and a plate spring that is disposed on one side of the first plate and fixes the electrode in the first guide groove by pressurizing the electrode, and a bottom chassis containing the lamp and the power supply socket therein, in which the first plate and the plate spring are formed of a conductive material.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: November 22, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-sik Choi, Du-hwan Chung, Cheol-yong Noh
  • Publication number: 20110216556
    Abstract: A display apparatus includes a light guide plate guiding a light, a light source arranged in a side portion of the light guide plate to generate the light, a display panel receiving the light from the light guide plate to display an image, a frame including a sidewall and a support part extended from the sidewall to support the display panel, and an optical member arranged between the light guide plate and the display panel to control a path of the light exiting from the light guide plate. The optical member includes a first side portion and a second side portion, a side surface of the first side portion faces a side surface of the support part, and the second side portion is positioned between the support part and the light guide plate.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 8, 2011
    Inventors: Joo Woan CHO, Yong Woo Lee
  • Publication number: 20110188263
    Abstract: Provided are a backlight assembly and a display device having the same. The backlight assembly includes; a light guide plate (“LGP”) having a light incident portion upon which light is incident and an opposite portion which is disposed substantially opposite to the light incident portion, a lower housing which accommodates the LGP therein, and at least one LGP fixing tape which fixes the LGP into the lower housing, wherein the at least one LGP fixing tape is interposed between the lower housing and lower surfaces of two opposite ends of the light incident portion of the LGP.
    Type: Application
    Filed: December 30, 2010
    Publication date: August 4, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-Woan CHO, Yong-Woo LEE, Hyoung-Joo KIM
  • Patent number: 7967623
    Abstract: A lamp socket includes a socket housing and a plurality of power supply members. The socket housing has a plurality of connecting holes extended in a vertical direction. The power supply members are disposed in the connecting holes, respectively, and each of the power supply members includes a plurality of lamp connecting parts and an inverter connecting part. The lamp connecting parts are protruded from an upper surface of the socket housing and include first and second portions facing each other. The inverter connecting part is integrally formed with the lamp connecting parts, and is protruded from a lower surface of the socket housing.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: June 28, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-Sik Choi, Hyeon-Yong Jang, Tae-Seok Jang, Jin-Sung Choi, Du-Hwan Chung, Dong-Hoon Kim, Seung-Ha Shin
  • Publication number: 20110149557
    Abstract: A lamp socket includes a body receiving a lamp, and a power supplying member disposed inside the body, the power supplying member comprising an electrical conductive material having elasticity, wherein the power supplying member electrically interconnects the lamp and an inverter substrate on which an inverter is mounted, wherein the power supplying member includes a lamp connector receiving a lead wire of the lamp, and an inverter connector formed integrally with the lamp connector, wherein the inverter connector receives a protrusion of the inverter substrate to encircle the protrusion.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 23, 2011
    Inventors: DU-HWAN CHUNG, Joo-Woan Cho, Seong-Sik Choi, Yong-Woo Lee, Hyun-Chul Bae, Cheol-Yong Noh
  • Publication number: 20110128756
    Abstract: A backlight assembly includes a plurality of point light sources, a light guide plate (“LGP”) and a printed circuit board (“PCB”). The LGP has a light incident face in which light is incident, a side surface extending from an edge portion of the light incident face, and a fixing groove which is formed from the side surface toward an inner portion thereof. The PCB includes a point light source disposing portion in which the point light sources are disposed along a first direction, an extending portion extending from the point light disposing portion along a second direction substantially perpendicular to the first direction, and a protrusion which is fixed at an end portion of the extending portion. The protrusion of the PCB is coupled with the fixing groove of the LGP.
    Type: Application
    Filed: May 20, 2010
    Publication date: June 2, 2011
    Inventors: Joo-Woan Cho, Sung-Kyu Shim, Sang-Hoon Lee, Joo-Young Kim, Taek-Sun Shin, Jin-Hee Park, Kwang-Wook Choi
  • Publication number: 20110116256
    Abstract: Provided is a backlight assembly which includes integral power supply sockets and ground sockets, in which the number of parts is reduced in addition to the manufacturing cost. The backlight assembly includes a lamp including a lamp tube and an electrode that protrudes beyond either end of the lamp tube, a power supply socket including a first plate that has a first guide groove through which the electrode is inserted and a plate spring that is disposed on one side of the first plate and fixes the electrode in the first guide groove by pressurizing the electrode, and a bottom chassis containing the lamp and the power supply socket therein, in which the first plate and the plate spring are formed of a conductive material.
    Type: Application
    Filed: January 21, 2011
    Publication date: May 19, 2011
    Inventors: Joo-Woan CHO, Seong-sik Choi, Du-hwan Chung, Cheol-yong Noh
  • Patent number: 7942685
    Abstract: A lamp socket includes a power-up device including a conductive material and supplying power to a lamp electrode, and a housing receiving the power transmitting member. The power transmitting member includes an inverter connector, a first lamp electrode supporter, and an terminal unit. The first lamp electrode supporter is connected to the inverter connector and formed with a lamp electrode receiving section into which the lamp electrode is inserted. The terminal unit has a fixed terminal connected to the first lamp electrode supporter, a free-end terminal supporting the lamp electrode such that the lamp electrode adheres to the lamp electrode receiving section, and a connection terminal that connects the fixed terminal to the free-end terminal in the housing.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 17, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-Sik Choi
  • Patent number: 7926965
    Abstract: A lamp socket that can reduce the thickness of both sides of a display device includes a socket main body having a contact hole formed therein, and a power-applying member coupled to the socket main body through the contact hole, and provided with a lamp connection terminal, an inverter connection terminal, and a terminal connection part connected with the lamp connection terminal in a bent form so as to connect the lamp connection terminal with the inverter connection terminal. Accordingly, the thickness of both sides of the display device including the lamp sockets is reduced, and the compatibility of the product is extended.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: April 19, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-Sik Choi, Yong-Woo Lee, Hyun-Chul Bae, Du-Hwan Chung, Cheol-Yong Noh
  • Patent number: 7903201
    Abstract: A liquid crystal display device includes a liquid crystal display panel, a plurality of light sources disposed behind the liquid crystal display panel, and a cover which accommodates the light sources. The cover includes a first cover part parallel with the liquid crystal display panel and disposed behind the light sources, a second cover part bent upward from an end portion of the first cover part, and a third cover part bent upward from the first cover part which faces the light sources. An end portion of the light sources is disposed between the second cover part and the third cover part.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: March 8, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-woan Cho, Du-hwan Chung, Tae-seok Jang, Seong-sik Choi
  • Publication number: 20110044071
    Abstract: A display device includes a light source assembly, a light guide plate (LGP), a lower receiving container, a reinforcing member, a display panel and an upper receiving container. The lower receiving container includes a first coupling portion formed on the first bottom surface. The reinforcing member includes a pressing down part structured to pressing down on an upper surface adjacent to a corner portion of the LGP and a fixing part integrally extending from an end portion of the pressing down part in parallel with a first sidewall of the lower receiving container to have a second coupling portion being coupled with the first coupling portion. The reinforcing member covers the light source assembly. The display panel is disposed on the LGP and the reinforcing member. The upper receiving container includes a third coupling portion coupled to the first coupling portion and the second coupling portion through a coupling member.
    Type: Application
    Filed: January 19, 2010
    Publication date: February 24, 2011
    Inventors: Joo-Woan CHO, Yong-Woo Lee, Se-Ki Park
  • Patent number: 7884894
    Abstract: A liquid crystal display device includes a liquid crystal display panel, a plurality of lamps disposed behind the liquid crystal display panel, and a container which accommodates the lamps. The container includes a first container component parallel with the liquid crystal display panel and disposed behind the lamp, a second container component upwardly bent from an end part of the first container component, and a third container component that is cut away from the first container component and is upwardly bent from the first container component. The liquid crystal display device also includes a reflective member including a first reflective member at least partially disposed between the first container component and the lamp, and a second reflective member separated from the first reflective member and covering the third container component.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: February 8, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-woan Cho, Seong-sik Choi, Du-hwan Chung
  • Patent number: 7883231
    Abstract: Provided is a backlight assembly which includes integral power supply sockets and ground sockets, in which the number of parts is reduced in addition to the manufacturing cost. The backlight assembly includes a lamp including a lamp tube and an electrode that protrudes beyond either end of the lamp tube, a power supply socket including a first plate that has a first guide groove through which the electrode is inserted and a plate spring that is disposed on one side of the first plate and fixes the electrode in the first guide groove by pressurizing the electrode, and a bottom chassis containing the lamp and the power supply socket therein, in which the first plate and the plate spring are formed of a conductive material.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: February 8, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Woan Cho, Seong-sik Choi, Du-hwan Chung, Cheol-yong Noh
  • Publication number: 20100328339
    Abstract: A display apparatus includes a backlight unit generating light, a display panel including a plurality of pixels controlling transmittance of the light based upon pixel data, a timing controller compensating the pixel data, and a data driver driving the display panel based upon the compensated pixel data. The display panel includes a first area to which the light having a first brightness is supplied and a second area to which the light having a second brightness lower than the first brightness is supplied. The timing controller compensates for the pixel data supplied to at least one area of the first and second areas using a predetermined compensation value to reduce a brightness difference between the first and second areas.
    Type: Application
    Filed: December 16, 2009
    Publication date: December 30, 2010
    Inventors: Joo Woan Cho, Gicherl Kim, Jaejoong Kwon, Sung-Kyu Shim, SEul-Gi Kim