Patents by Inventor Du-Hwan Chung

Du-Hwan Chung 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: 7549881
    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: July 24, 2007
    Date of Patent: June 23, 2009
    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: 20090128734
    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: Application
    Filed: June 11, 2008
    Publication date: May 21, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-Woan CHO, Seong-Sik CHOI, Yong-Woo LEE, Hyun-Chul BAE, Du-Hwan CHUNG, Cheol-Yong NOH
  • Publication number: 20090027904
    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: July 18, 2008
    Publication date: January 29, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Du-Hwan Chung, Joo-Woan Cho, Seong-Sik Choi, Yong-Woo Lee, Hyun-Chul Bae, Cheol-Yong Noh
  • Publication number: 20080316739
    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: May 15, 2008
    Publication date: December 25, 2008
    Inventors: Joo-woan Cho, Seong-sik Choi, Du-hwan Chung, Cheol-yong Noh
  • Publication number: 20080180593
    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: Application
    Filed: October 31, 2007
    Publication date: July 31, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Joo-woan CHO, Seong-sik CHOI, Du-hwan CHUNG
  • Publication number: 20080117351
    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: Application
    Filed: October 31, 2007
    Publication date: May 22, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-woan CHO, Du-hwan CHUNG, Tae-seok JANG, Seong-sik CHOI
  • Publication number: 20080074576
    Abstract: A liquid crystal display device includes a liquid crystal panel, a light source unit, a socket unit into which an end portion of the light source unit is inserted, and an accommodation casing accommodating the light source unit and the socket unit. The socket unit includes a clamp supports the light source unit, a socket main body coupled to the accommodation casing and including insertion holes accommodating the clamp, and a coupling protrusion. The socket unit also includes a socket locker including an opening unit providing an insertion position into which the coupling protrusion is inserted, and a coupling position into which the socket locker is coupled to the socket main body.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 27, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-woan CHO, Seong-sik CHOI, Du-hwan CHUNG, Dong-hoon KIM, Tae-seok JANG
  • Publication number: 20080024068
    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: Application
    Filed: July 24, 2007
    Publication date: January 31, 2008
    Inventors: Joo-Woan Cho, Seong-Sik Choi, Hyeong-Yong Jang, Tae-Seok Jang, Jin-Sung Choi, Du-Hwan Chung, Dong-Hoon Kim, Seung-Ha Shin
  • Publication number: 20080024073
    Abstract: A lamp driving circuit includes: a voltage supply part including a first voltage supply part and a second voltage supply part; a first circuit part including a first terminal, a second terminal and a first coil; a second circuit part including a second coil electromagnetically coupled to the first coil and which supplies a voltage to a lamp; and an electric current detecting part which detects an electric current of the first coil and includes a detecting resistor and an electric current detector.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 31, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyeon-Yong JANG, Seong-Sik CHOI, Du-Hwan CHUNG, Moon-Shik KANG, Song-Yi HAN
  • Publication number: 20080013310
    Abstract: A backlight assembly includes an optical unit including a lamp unit emitting light. The backlight assembly also includes a receiving container. The receiving container includes a plurality of side walls, a bottom plate separably combined with the side walls, and a combining element for combining the side walls with the bottom plate. The receiving container receives the optical unit in a receiving space defined by the side walls, the bottom plate, and the combining element.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 17, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seock-Hwan KANG, Du-Hwan CHUNG
  • Publication number: 20070153155
    Abstract: A liquid crystal display (“LCD”) includes an LCD panel, a light guiding plate disposed beneath the LCD panel, a light source part disposed at a lateral side of the light guiding plate, a cover comprising a first surface parallel with the light guiding plate and a second surface extending from the first surface, and accommodating the light guiding plate and the light source part, and a light source cover which encompasses the light source part, reflects light from the light source part to the light guiding plate, and comprises an expansion part protruded toward the cover to contact the cover.
    Type: Application
    Filed: January 3, 2007
    Publication date: July 5, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Du-hwan CHUNG, Seok-won LEE, Choong-sik KIM
  • Publication number: 20070132361
    Abstract: A backlight assembly includes a flat fluorescent lamp, a buffering member and a bottom chassis. The flat fluorescent lamp includes a lamp body generating light and an electrode portion formed on the lamp body. The buffering member contacts the electrode portion and includes at least one hole. The bottom chassis includes a bottom plate and a sidewall to receive the flat fluorescent lamp and the buffering member and includes at least one hole.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 14, 2007
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Du-Hwan Chung, Byung-Cheon Yoo, Hyun-Chul Bae, Hea-Chun Lee
  • Publication number: 20070081322
    Abstract: A backlight assembly includes a container, a plurality of lamps and a lamp-fixing member. The container includes a bottom face and side faces extending therefrom that define a receiving space. The lamps are arranged in parallel with each other in the container. The lamp-fixing member includes a support body installed in the container and arranged in a direction intersecting a lengthwise direction of extension of each of the lamps, a lamp-fixing portion protruding from the support body and covering a respective lamp, and a boss protruding from an inner face of the lamp-fixing portion and extending toward a center of the respective lamp to fix the respective lamp with a corresponding lamp-fixing portion via a point or line contact. Thus, a local decrease in temperature of the lamp covered by the lamp-fixing portion may be prevented to improve image display quality by preventing or eliminating dark spots.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 12, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Seong-Sik CHOI, Kyung-Rok KO, Du-Hwan CHUNG, Min-Ho OK
  • Publication number: 20070053177
    Abstract: A backlight assembly includes a receiving container, a lamp, a fixing member and a lamp holder. The lamp is disposed in the receiving container. The fixing member is disposed over the receiving container. The lamp holder has a hole into which the lamp is inserted, and a protruding portion supporting the fixing member. The protruding portion has a structure capable of making line contact or reduced surface contact with the fixing member. As a result, heat transfer from the lamp holder to the fixing member may be decreased to enhance display quality.
    Type: Application
    Filed: September 5, 2006
    Publication date: March 8, 2007
    Inventors: Seong-Sik Choi, Du-Hwan Chung
  • Publication number: 20060158897
    Abstract: In a backlight assembly and an LCD apparatus including a receiving unit formed by an injection molding process, a plurality of sidewalls is protruded from a bottom plate, and a receiving space is defined by the sidewalls and the bottom plate. A strength-reinforcing member is formed on a rear surface of the bottom plate to thereby reinforce a bending strength of the bottom plate. Accordingly, the receiving unit for receiving a lamp unit is formed using a material used with an injection molding process, and the strength-reinforcing member reinforces the bending strength of the bottom plate. Cost and weight of the backlight assembly and the LCD apparatus may be sufficiently reduced.
    Type: Application
    Filed: January 17, 2006
    Publication date: July 20, 2006
    Inventors: Seong-Sik Choi, Dong-Lyoul Shin, Doo-Won Lee, Kui-Yong Choi, Jae-Hwan Chun, Du-Hwan Chung
  • Publication number: 20060103775
    Abstract: A reflection sheet improving a display quality, a backlight unit including the reflection sheet and a display device including the backlight unit is provided. The reflection sheet includes a reflection layer and a heat emission layer. The reflection layer reflects a light supplied from a light source. The heat emission layer contacts the reflection layer to emit a heat generated from the light source. The heat emission insulates the light source from the receiving member to suppress a leakage current of the light source.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 18, 2006
    Inventor: Du-Hwan Chung
  • Publication number: 20060103774
    Abstract: A display device includes a display panel displaying an image, a backlight assembly providing the display panel with light, a receiving container, and a light-blocking member. The backlight assembly includes a light source, an optical sheet disposed over the light source and a light-reflecting sheet disposed under the light source. The receiving container includes a bottom plate having an opening portion, and defines a receiving space for receiving the display panel and the backlight assembly. The light-blocking member is disposed at a backside surface of the light-reflecting sheet. Therefore, heat generated from the light source is easily dissipated through the opening to enhance display quality.
    Type: Application
    Filed: August 17, 2005
    Publication date: May 18, 2006
    Inventors: Sang-Sun Han, Du-Hwan Chung
  • Publication number: 20060062015
    Abstract: In a radiant pad, a backlight assembly and a display device, the backlight assembly has a light source, a receiving container and a heat absorbing member. The receiving container receives the light source and the heat absorbing member to absorb radiant heat emitted by the light source. The backlight assembly further includes a discharge member disposed at an exterior surface of the receiving container to discharge heat from the light source transmitted through the receiving container. Accordingly, a temperature of the backlight assembly is lowered and a temperature difference between left and right areas of the backlight assembly is also reduced, thereby improving brightness properties.
    Type: Application
    Filed: August 12, 2005
    Publication date: March 23, 2006
    Inventors: Du-Hwan Chung, Jong-Dae Park