# US 2010/0165237 A1 · Backlight unit and liquid crystal display having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0165237 A1 - Document ID: US20100165237A1 - Status: Published application - Kind: A1 - Application number: 12/632,894 - Filed: 2009-12-08 - Published: 2010-07-01 - Earliest claimed: 2008-12-30 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Sung Soo JUNG - Web page: https://patentgrep.com/patent/US20100165237A1 ## CPC - G02B 6/0083: {Details of electrical connections of light sources to drivers, circuit boards, or the like} - G02B 6/0073: {Light emitting diode [LED]} - G02F 1/133608: {including particular frames or supporting means} - G02F 1/133612: {Electrical details} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A backlight unit and a liquid crystal display having the same. The backlight unit includes a lower cover, an interconnection coupling hole, an inverter board, and an interconnection. The lower cover accommodates a printed circuit board, which mounts at least one light emitting diode thereon and is provided at one side thereof with a first connector. The interconnection coupling hole is formed in a bottom surface of the lower cover at a position corresponding to the first connector. The inverter board is disposed on a rear surface of the lower cover to apply a driving voltage to the at least one light emitting diode. The interconnection is provided at one end thereof with a second connector to electrically connect the printed circuit board to the inverter board. A coupling part of the first connector coupled to the second connector is directed to the interconnection coupling hole, so the assembling time of the backlight unit and the liquid crystal display is reduced, thereby improving the productivity of the backlight unit and the liquid crystal display. ## Claims ### Claim 1 A backlight unit, comprising; a lower cover provided with a bottom surface extended in a first direction to accommodate a printed circuit board, the printed circuit board having at least one light emitting diode mounted thereon and a first connector provided at one side of the printed circuit board; an inverter board disposed on a rear surface of the lower cover to apply a driving voltage to the at least one light emitting diode; an interconnection having a second connector provided at an end thereof to electrically connect the printed circuit board to the inverter board; an interconnection coupling hole formed in the bottom surface of the lower cover to cause at least one of the first connector and the second connector to pass through the lower cover, wherein the first connector is provided with a coupling part directed in a second direction crossing the first direction to couple the first connector to the second connector through the coupling part. ### Claim 2 (depends on 1) The backlight unit of claim 1, wherein the interconnection coupling hole is formed at a position corresponding to the first connector, and the coupling part of the first connector is disposed to face the interconnection coupling hole. ### Claim 3 (depends on 1) The backlight unit of claim 1, wherein the coupling part is directed in an outward direction of the bottom surface. ### Claim 4 (depends on 1) The backlight unit of claim 1, wherein the printed circuit board is fixed to a fixing member, the fixing member being provided on the lower cover and including thermally conductive metal. ### Claim 5 (depends on 1) The backlight unit of claim 1, wherein the interconnection coupling hole is formed at a position corresponding to the first connector, and the coupling part of the first connector protrudes through the interconnection coupling hole. ### Claim 6 (depends on 1) The backlight unit of claim 1, wherein the interconnection passes through the interconnection coupling hole and is extended toward the first connector, and the second connector is coupled to the coupling part of the first connector in a direction perpendicular to the first direction. ### Claim 7 A backlight unit, comprising: a light guide plate; a printed circuit board on which at least one light emitting diode is mounted to radiate light to a side surface of the light guide plate; a lower cover provided with an interconnection coupling hole formed at one side of a bottom surface thereof to accommodate the light guide plate and the printed circuit board therein; an inverter board disposed at a rear surface of the lower cover to apply a driving voltage to the light emitting diode; and a first connector formed on the printed circuit board to connect the inverter board and the at least one light emitting diode, wherein a coupling part of the first connector is directed in an outward direction of the bottom surface of the lower cover and is coupled to an interconnection which is connected to the inverter board. ### Claim 8 (depends on 7) The backlight unit of claim 7, further comprising a second connector provided at one end of the interconnection so as to be coupled to the first connector. ### Claim 9 (depends on 8) The backlight unit of claim 8, wherein the second connector is coupled to the first connector via the interconnection coupling hole. ### Claim 10 (depends on 8) The backlight unit of claim 8, wherein the interconnection coupling hole is formed at a position to face the first connector. ### Claim 11 (depends on 10) The backlight unit of claim 10, wherein the coupling part of the first connector protrudes through the interconnection coupling hole. ### Claim 12 (depends on 10) The backlight unit of claim 10, wherein the coupling part of the first connector is directed to the interconnection coupling hole. ### Claim 13 A liquid crystal display, comprising: a liquid crystal display panel; a backlight unit including a light guide plate to provide light to the liquid crystal display panel and a printed circuit board on which a plurality of light emitting diodes are mounted to radiate light toward the light guide plate, the printed circuit board including a first connector provided at one side of the printed circuit board; a lower cover to accommodate the liquid crystal display panel and the backlight unit and having an interconnection coupling hole formed at a position corresponding to the first connector; an inverter board installed on a rear surface of the lower cover to apply a driving voltage to the light emitting diodes; and an interconnection having one end connected to the inverter board, and an opposite end connected to the first connector through the interconnection coupling hole. ### Claim 14 (depends on 13) The liquid crystal display of claim 13, wherein a coupling part of the first connector coupled to the second connector is directed to the interconnection coupling hole. ### Claim 15 (depends on 14) The liquid crystal display of claim 14, wherein the first connector is provided in a socket type and the second connector is provided in a plug type. ### Claim 16 (depends on 14) The liquid crystal display of claim 14, wherein the coupling part of the first connector protrudes from the rear surface of the lower cover through the interconnection coupling hole. ### Claim 17 (depends on 14) The liquid crystal display of claim 14, wherein a fixing member including thermally conductive metal is provided on the lower cover to fix the printed circuit board. ### Claim 18 A liquid crystal display, comprising: an upper cover and a lower cover; a liquid crystal display panel disposed between the upper cover and the lower cover; an optical film disposed between the liquid crystal display panel and the lower cover; a light guide plate disposed between the optical film and the lower cover; an inverter board installed on a rear surface of the lower cover; a printed circuit board having at least one light emitting diode, and disposed to face a side of the light guide plate; a first connector mounted on the printed circuit board so as to be connected to the at least one light emitting diode, and provided with a coupling part disposed perpendicular to a bottom surface of the lower cover so as to be directed in an outward direction of the bottom surface of the lower cover; an interconnection having one end which is connected to the inverter board, and an opposite end which is connected to the coupling part, so as to connect the inverter board and the first connector; and an interconnection coupling hole formed at one side of a bottom surface of the lower cover to pass the interconnection. ### Claim 19 (depends on 18) The liquid crystal display according to claim 18, wherein the interconnection coupling hole is formed at a position corresponding to the first connector. ### Claim 20 (depends on 19) The liquid crystal display according to claim 19, wherein the coupling part is disposed at the inside of the lower cover to face the interconnection coupling hole. ### Claim 21 (depends on 19) The liquid crystal display according to claim 19, wherein the coupling part is disposed at the outside of the lower cover through the interconnection coupling hole.