KR100840257B1 - Backlight Assembly for Liquid Crystal Display - Google Patents

Abstract

Disclosed is a backlight assembly for a liquid crystal display device for improving workability and product quality in alignment of a reflector with a return wire in a direct type liquid crystal display device. A plurality of lamps having a first electrode and a second electrode are arranged above the reflecting plate, and a plurality of first wires connected to the lamp have one end connected to each of the first electrodes, and the plurality of second wires have one end each of the second electrodes. Is connected to. The first connector is connected to the other end of the first wire to provide a first power supply voltage provided from the outside to the first electrode, and the second connector is provided with a second power supply voltage provided from the outside. The third connector is connected to the other end of the second wire to provide a second power supply voltage provided from the second connector to the second electrode. Accordingly, workability can be improved and quality can be improved by assembling the reflector and then connecting the return wire to the intermediate connector by providing a contact connector in the middle of the return wire.

Direct Type, Backlight, Connector, Plug, Socket, Return Wire

Description

BACK LIGHT ASSEMBLY FOR LIQUID CRYSTAL DISPLAY}

1 is a view for explaining a general backlight assembly for a liquid crystal display device.

2 is a view for explaining a backlight assembly for a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a view for explaining the cold electrode connection of FIG.

4 is a diagram for describing a backlight assembly for a liquid crystal display according to another exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: reflector 200: lamp array

210, 220, 230, 240: lamp 300: hot electrode connection

400: first cold electrode connection portion 414, 424: socket

416, 426: Plug 500: Second cold electrode connection

600: third cold electrode connector 700: fourth cold electrode connector

410, 420: connector for the first cold electrode 510, 520: connector for the second cold electrode

212, 222, 232, 242: wire for hot electrodes                 

214, 224, 234, 244: wire for cold electrode

The present invention relates to a backlight assembly for a liquid crystal display device, and more particularly, to a backlight assembly for a liquid crystal display device for improving workability and product quality during alignment of a reflective plate and a return wire in a direct type liquid crystal display device. .

In general, a liquid crystal display device uses an edge type backlight assembly having a structure in which light of a lamp is incident on a liquid crystal display panel through a light guide plate according to an installation position of a lamp, and light generated from the lamp is uniformly distributed by a diffuser plate. Next, it is divided into a backlight assembly of a direct method having a structure that is incident on the liquid crystal display panel.

The edge method in which the lamp unit is installed on the side of the light guide plate is mainly applied to a relatively small liquid crystal display device such as a monitor of a laptop (Lap-Top) type computer and a desktop (desk-top type) computer. It has good properties, long service life, and is advantageous for thinning a liquid crystal display device.

On the other hand, as the size of the liquid crystal display device is increased to 20 inches or more, the direct-type backlight assembly, which is mainly developed, is to directly illuminate the front of the LCD panel by arranging a plurality of lamps in a row on the lower surface of the diffusion plate. .

The direct method is mainly used for a large screen liquid crystal display device requiring high brightness because the light utilization efficiency is higher than that of the edge method.                         

1 is a view for explaining a general backlight assembly for a liquid crystal display device, in particular a view for explaining a direct type backlight assembly.

Referring to FIG. 1, a typical backlight assembly for a liquid crystal display device includes a reflector 10, a plurality of lamps 22, 24, 26, and 28 disposed on the reflector, and a plurality of lamps 22, 24, 26, and 28. First to fourth wires 31, 33, 35, and 37 respectively connected to the hot electrodes, and fifth to eighth wires 32, 34, and 36 respectively connected to the cold electrodes of the lamps 22, 24, 26, and 28, respectively. , 38), and first to fourth connectors 42, 44, 46, and 48. Here, the first to fourth connectors 42, 44, 46, and 48 are connected to the hot electrodes and the cold electrodes of the lamps 22, 24, 26, and 28, respectively, to supply power voltages supplied from the outside to the lamps 22, 24. , 26 and 28, respectively.

When assembling, the lamp array is arranged on the reflective plate 10 and wires for supplying power to the arranged lamp arrays are connected to the connectors through the lower portion of the reflector to supply power to the lamp.

However, when processing the lamp wire in the conventional direct backlight assembly, there are many difficulties in the direct backlight assembly process because there is a reflector between the lamp and the lamp wire.

That is, the method of connecting the hot electrode and the cold electrode of each lamp to one connector, respectively, there is a problem that the number of processes increases because the number of wires.

In addition, since the reflector plate between the lamp and the return wire should be installed, there is a problem in that it is difficult to assemble the reflector, and there is a problem in that a fatal error in quality occurs such that the return wire is touched during assembly and the coating is peeled off.

Accordingly, the technical and problem of the present invention are to solve such a conventional problem, and an object of the present invention is to provide a backlight for a liquid crystal display device for facilitating the assembly of a reflector installed between a lamp and a return wire in a direct type liquid crystal display device. To provide an assembly.

According to one aspect of the present invention, there is provided a backlight assembly for a liquid crystal display device comprising: a reflector; A plurality of lamps arranged on the reflector and having a first electrode and a second electrode, a plurality of first wires having one end connected to each of the first electrodes, and a plurality of second ends having one end connected to each of the second electrodes Lamp array with wires; A first connector connected to the other end of the first wire and configured to provide a first power supply voltage from the outside to the first electrode; A second connector for receiving a second power voltage provided from the outside; And a third connector connected to the other end of the second wire and configured to provide the second electrode with a second power supply voltage provided from the second connector.

According to such a backlight assembly for a liquid crystal display device, workability can be improved by assembling a reflector plate and then connecting the return wire to the intermediate connector by installing a contact connector in the middle of the return wire. can do.                     

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

FIG. 2 is a diagram for describing a backlight assembly for a liquid crystal display according to an exemplary embodiment of the present invention. In particular, FIG.

Referring to FIG. 2, a backlight assembly for a liquid crystal display according to an exemplary embodiment of the present invention may include a reflector 100, a lamp array 200, a hot electrode connector 300, a first cold electrode connector 400, and a first assembly. A quadruple equation including two cold electrode connectors 500 and four lamps connected in parallel will be described as an example.

The reflector 100 is disposed under the lamp array 200 to reflect the light emitted from the lamp array 200 to improve the efficiency of the light.

The lamp array 200 may include first to fourth lamps 210, 220, 230, and 240 arranged on the reflective plate 100, and wires 212 for first to fourth hot electrodes connected to the hot electrodes of the respective lamps. , 222, 232, and 242, and the first to fourth cold electrode wires 214, 224, 234, and 244 connected to the cold electrodes of the respective lamps, the hot electrode connection part 300 and the first cold electrode connection part. Each connected to 400.

In more detail, the hot electrode of the first lamp 210 is connected to the wire 112 for the first hot electrode, the cold electrode of the first lamp 210 is connected to the wire 214 for the first cold electrode, The hot electrode of the second lamp 220 is connected to the second hot electrode wire 222, and the cold electrode of the second lamp 220 is connected to the second cold electrode wire 224.

In addition, the hot electrode of the third lamp 230 is connected to the third hot electrode wire 232, the cold electrode of the third lamp 230 is connected to the third cold electrode wire 234, the fourth The hot electrode of the lamp 240 is connected to the fourth hot electrode wire 242, and the cold electrode of the fourth lamp 240 is connected to the fourth cold electrode wire 244.

In general, the first to fourth cold electrode wires 214, 224, 234, and 244 have a length of the first to fourth hot electrode wires 212, 222, 232. Although smaller than the length of 242, the length of the first to fourth cold electrode wires 214, 224, 234, and 244 is the length of the first to fourth hot electrode wires 212, 222, 232, and 242. It might be larger than the length.

On the other hand, the hot electrode connection portion 300 is composed of the first and second hot electrode connectors (310, 320), the first to fourth lamps 210, 220, 230, 240 to each of the hot electrodes. Here, the first and second hot electrode connectors 310 and 320 are preferably plug-in.

Of course, although two lamps are connected in parallel to one hot electrode connector in one embodiment, one lamp may be connected to one hot electrode connector, and three or more may be connected to one hot electrode connector. The lamps may be connected in parallel.

The first cold electrode connector 400 includes the first and second cold electrode connectors 410 and 420, and includes first to second external voltages, preferably ground powers, connected to each other through connector connections. Four cold electrodes are provided to the cold electrodes of the first to fourth lamps 210, 220, 230, and 240 through the wires 214, 224, 234, and 244.                     

More specifically, the first cold electrode connector 410 may include a first socket 414 and a second cold electrode connector 500 connected to the cold electrodes of the first and second lamps 210 and 220, respectively. The plug 416 provides a second power supply voltage to the cold electrodes of the first and second lamps 210 and 220 through the fastening of the first socket 414 and the first plug 416.

In addition, the second cold electrode connector 420 may include a second socket 424 connected to the cold electrodes of the third and fourth lamps 230 and 240, and a second plug 426 connected to the second cold electrode connector 500, respectively. And a second power supply voltage to the cold electrodes of the third and fourth lamps 230 and 240 through fastening of the second socket 424 and the second plug 426, respectively.

Of course, in the drawings, two lamps are connected to one cold electrode connector in parallel in one embodiment, but one lamp may be connected to one cold electrode connector, and three or more may be connected to one cold electrode connector. The lamps may be connected in parallel.

The second cold electrode connector 500 includes the first and second cold electrode connectors 510 and 520, and receives the second power voltage, preferably the ground power, provided from the outside, and thus the first cold electrode connector 400. And the first and second cold electrode connectors 410 and 420, respectively. Here, the first and second cold electrode connectors 510 and 520 are preferably plug-in.

FIG. 3 is a view for explaining the cold electrode connection part of FIG. 2 described above. In particular, FIG. 3 is a view for explaining an example of a connector for a first cold electrode.

2 and 3, the first socket 414 connected to the cold electrodes of the first and second lamps 210 and 220, respectively, is accommodated in a predetermined storage container provided on the side wall of the mold frame. Of course, it is preferable that the position where the first socket 414 is accommodated is a predetermined area that does not affect the effective display area of the liquid crystal display panel in which the light emitted from the lamp is disposed.

As is known, a mold frame generally consists of an open bottom surface and four side walls, each of which consists of an inner side wall formed in a reflecting plate side direction and an outer side wall formed in a bottom chassis side direction, and an opened bottom. The reflecting plate is disposed on the surface, and a plurality of lamps are accommodated on the upper side of the disposed reflecting plate and the side of the mold frame, and spaced apart by a predetermined distance through a predetermined support member on the upper side of the mold frame to mount the diffuser plate.

The first plug 416 connected to the first cold electrode connector 510 of the second cold electrode connector 500 may be detachable, and the first plug connected to the cold electrode of the assembled lamp after the lamp is assembled on the reflector plate. The second power supply voltage is provided to the cold electrode of the lamp through the fastening with the socket 414.

As such, when assembling the direct type backlight assembly, power can be supplied through fastening the socket connected to the cold electrode of the lamp and the plug for providing the second power voltage without assembling a separate return wire after assembling the reflector. As a result, the number of working steps can be reduced, and the problem that the return wire touches the lower part of the reflector and the coating is peeled off can be solved.

In the above description, the two-to-one direct backlight assembly for connecting two lamps with one connector has been described, but it is also easily applied to the many-to-one direct backlight assembly for connecting a plurality of lamps with one connector. This will be possible.

4 is a view for explaining a direct type backlight assembly according to another embodiment of the present invention. In particular, it is a view for explaining the back surface of the backlight assembly.

Referring to FIG. 4, a backlight assembly for a liquid crystal display according to another exemplary embodiment of the present invention may include a reflector plate 100, a lamp array 200, a hot electrode connector 300, a third cold electrode connector 600, and a third cold electrode connector 600. Four cold electrode connection unit 700, including four lamps are connected in parallel to the four equations as an example, and the same reference numerals for the same components when compared with FIG. 2 described above, the description thereof will be omitted.

The third cold electrode connector 600 is formed of a cold electrode connector, and receives first and fourth cold electrode wires 214 and 224 connected to each other by receiving an external second power voltage, preferably ground power, through a connector connection. 234 and 244 to the cold electrodes of the first to fourth lamps 210, 220, 230, and 240, respectively.

More specifically, the cold electrode connector is a plug 612 connected to the socket 610 and the second cold electrode connection 700 connected to the cold electrodes of the first to fourth lamps 210, 220, 230, and 240, respectively. And a second power supply voltage provided from the fourth cold electrode connection part 700 via the wire 614 through the fastening of the socket 610 and the plug 612 to the first to fourth cold electrode wires ( It is provided to the cold electrodes of the first to fourth lamps 210, 220, 230, 240 via 214, 224, 234, 244, respectively.

3, the socket 610 connected to the first to fourth cold electrode wires 214, 224, 234, and 244 is mounted on the sidewall of the mold frame and fastened to the socket 610. The plug 612 is connected to the wire 614 connected to the fourth cold electrode connector 700 to provide a second power voltage to the cold electrode of each lamp through connector connection after assembling the reflector.

The fourth cold electrode connector 700 includes a cold electrode connector 710, and receives a second power supply voltage, preferably ground power, provided from the outside and provides the cold electrode connector 600 to the cold electrode connector 600. Here, the cold electrode connector 710 is preferably a plug.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

As described above, according to the present invention, the socket is connected to at least one lamp wire connected to the cold electrode of the lamp, and then the lamp is connected to the lamp socket, and then the second power supply voltage is supplied to the socket. By combining the plug, it is possible to solve the problem of damage to the lamp wire caused by the reflector or a decrease in working efficiency when assembling the direct backlight assembly.

Claims (4)

Reflector; A plurality of lamps arranged on the reflector and having a first electrode and a second electrode, a plurality of first wires having one end connected to each of the first electrodes, and a plurality of second ends having one end connected to each of the second electrodes Lamp array with wires; A first connector connected to the other end of the first wire and configured to provide a first power supply voltage from the outside to the first electrode; A second connector for receiving a second power voltage provided from the outside; And And a third connector connected to the other end of the second wire and configured to provide a second power supply voltage provided from the second connector to the second electrode. The method of claim 1, wherein the third connector, A plug connected with the second connector through the third wire; And And a socket for supplying a second power supply voltage provided from the plug to the second electrode via the second wire through fastening with the plug. The backlight assembly of claim 2, wherein the socket is fastened to the plug after the lamp array is arranged on the reflective plate. The backlight assembly of claim 1, wherein the third connector is accommodated in an inner wall of a mold frame accommodating the lamp array.

Images