KR101148209B1 - Back-light assembly and display apparatus having the same - Google Patents

Abstract

Disclosed are a backlight assembly and a display device having the same, which can reduce power consumption while improving productivity. The backlight assembly includes one or more U-shaped lamps generating light in response to the first and second driving voltages and an inverter outputting the first and second driving voltages. The at least one U-shaped lamp includes first and second external electrodes formed to surround the outer circumferential surfaces of the first and second ends of the U-shaped lamp tube and the U-shaped lamp tube, respectively, to receive the first and second driving voltages, respectively. do. The inverter provides first and second driving voltages to the first and second external electrodes, respectively, in response to external power supplied from the outside. Accordingly, power consumption may be reduced while improving productivity of the backlight assembly and the display device having the same.

Description

BACK-LIGHT ASSEMBLY AND DISPLAY APPARATUS HAVING THE SAME}

1 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention.

FIG. 2 is a combined perspective view of the backlight assembly shown in FIG. 1.

3 is a plan view of the backlight assembly illustrated in FIG. 2.

4 is a cross-sectional view taken along the line II ′ of FIG. 3.

FIG. 5 is a cross-sectional view taken along the line II-II ′ of FIG. 3.

6 is an exploded perspective view of a backlight assembly according to another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of the backlight assembly illustrated in FIG. 6 taken along a cutting line III-III ′.

8 is a perspective view illustrating in detail the first mold cover illustrated in FIG. 6.

9 is a perspective view showing in detail a plurality of the fixing member shown in FIG.

FIG. 10 is a cross-sectional view taken along the line IV-IV ′ of FIG. 9.

FIG. 11 is a plan view specifically illustrating a positional relationship between a sensing sensor and a U-shaped lamp illustrated in FIG. 6.

12 is an exploded perspective view of 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: U-shaped lamp 110: U-shaped lamp tube

120 and 130: first and second external electrodes 210 and 220: first and second electrode plates

300: mold frame 400: inverter

410, 420: first and second wire 500, 1000: backlight assembly

600: storage container 710: diffusion plate

720: diffusion sheet 730: reflector

810, 820: first and second mold cover 900: fixing member

The present invention relates to a backlight assembly and a display device having the same, and more particularly, to a backlight assembly and a display device having the same, which can reduce power consumption while improving productivity.

A liquid crystal display device, which is one of display devices, includes a liquid crystal display panel for displaying an image and a backlight assembly for supplying light to the liquid crystal display panel.

In recent years, as the size of the liquid crystal display panel increases, the size of the backlight assembly also increases. As a result, the backlight assembly adopts a direct type structure in which the backlight assembly is disposed parallel to each other on the rear surface of the liquid crystal display panel to provide light directly to the liquid crystal display panel.                         

Such a direct backlight assembly includes a plurality of lamps for high brightness and brightness uniformity. In general, a plurality of lamps employed in the direct backlight assembly is composed of cold cathode fluorescent lamps. Accordingly, the direct type backlight assembly further includes a plurality of inverters for driving the plurality of lamps in parallel. As a result, the manufacturing cost of the direct type backlight assembly is increased and productivity is lowered.

In addition, the direct backlight assembly further includes a wire for electrically connecting the plurality of inverters and the plurality of lamps. Since a plurality of inverters are provided at one end of the plurality of lamps, a wire connected to the other end of the plurality of lamps is returned to one end side. However, the return wire generates a leakage current, lowering the brightness uniformity of the direct backlight assembly, and increasing power consumption.

Accordingly, it is an object of the present invention to provide a backlight assembly capable of reducing power consumption while improving productivity.

Another object of the present invention is to provide a display device having the above-described backlight assembly.

According to an aspect of the present invention, a backlight assembly includes one or more U-shaped lamps, an inverter, a first electrode plate, and a second electrode plate that generate light in response to the first and second driving voltages.

The U-shaped lamp includes first and second external electrodes formed to surround the outer circumferential surfaces of the first and second ends of the U-shaped lamp tube and the U-shaped lamp tube, respectively, to receive the first and second driving voltages, respectively. do. The inverter outputs the first and second driving voltages in response to external power supplied from the outside.

The first electrode plate is coupled to the first external electrode to provide the first driving voltage from the inverter to the first external electrode, and the second electrode plate is coupled to the second external electrode to prevent from the inverter. Supplying the second driving voltage to the second external electrode;

A display device according to another aspect of the present invention includes a display panel for displaying an image using light and a backlight assembly provided under the display panel and generating the light and providing the light to the display panel.

The backlight assembly includes one or more U-shaped lamps, an inverter, a first electrode plate, and a second electrode plate that generate light in response to the first and second dynamic voltages.

The U-shaped lamp includes first and second external electrodes formed to surround the outer circumferential surfaces of the first and second ends of the U-shaped lamp tube and the U-shaped lamp tube, respectively, to receive the first and second driving voltages, respectively. do. The inverter outputs the first and second driving voltages in response to external power supplied from the outside.

The first electrode plate is coupled to the first external electrode to provide the first driving voltage from the inverter to the first external electrode, and the second electrode plate is coupled to the second external electrode to prevent from the inverter. Supplying the second driving voltage to the second external electrode;

According to such a backlight assembly and a display device having the same, since one inverter for driving a plurality of U-shaped lamps is provided, productivity of the backlight assembly is improved and power consumption of the backlight assembly can be reduced by removing the return wire. .

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

1 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention, Figure 2 is a combined perspective view of the backlight assembly shown in FIG.

1 and 2, a backlight assembly 500 according to an embodiment of the present invention includes a plurality of U-shaped lamps 100, first and second electrode plates 210 and 220, and a mold frame 300. And an interlock 400.

Each of the plurality of U-shaped lamps 100 includes a U-shaped lamp tube 110 and first and second external electrodes 120 and 130 to generate light. The first external electrode 120 is formed to surround the outer surface of the first end of the U-shaped lamp tube 110. The second external electrode 130 is formed to surround the outer surface of the second end of the U-shaped lamp tube 110.

Each of the U-shaped lamp tubes 110 extends long in a predetermined direction to generate light, and a second light emitting part extending in parallel with the first light emitting part 111 to generate light ( 112 and the curved portion 113 bent with a predetermined curvature to connect the first and second light emitting portions 111 and 112.

The first electrode plate 210 protrudes from the first base substrate 211 and the first base substrate 211 extending in a direction perpendicular to the first and second light emitting parts 111 and 112. A plurality of first electrode clips 212 is coupled to the first ends of the plurality of U-shaped lamps 100. Here, the plurality of first electrode clips 212 are spaced apart from each other at predetermined intervals. The second electrode plate 220 protrudes from the second base substrate 221 and the second base substrate 221 extending in parallel with the first base substrate 211 and the plurality of U-shaped lamps 100. And a plurality of second electrode clips 222 that engage with the second ends of the. Here, the plurality of second electrode clips 222 are spaced apart from each other at a predetermined interval.

The plurality of first and second electrode clips 212 and 222 not only serve to fix the plurality of U-shaped lamps 100 at designated positions, but also the first and second electrodes provided from the inverter 400. A driving voltage is applied to the first and second external electrodes 120 and 130 of each of the plurality of U-shaped lamps 100, respectively.

As shown in FIG. 2, the first electrode plate 210 is provided between the second electrode plate 220 and the plurality of U-shaped lamps 100. Each of the plurality of first electrode clips 212 formed on the first electrode plate 210 is provided between two adjacent second electrode clips 222 formed on the second electrode plate 220. Thus, the plurality of first electrode clips 212 are only connected to the first external electrodes 120 of the plurality of U-shaped lamps 100, and the plurality of second electrode clips 222 are only the plurality of first electrode clips 212. It is connected to the second external electrode 130 of the U-shaped lamp (100).

The inverter 400 outputs the first and second driving voltages in response to an external power source provided from the outside. The inverter 400 is electrically connected to the first and second electrode plates 210 and 220 through first and second wires 410 and 420, respectively. The first driving voltage provided to the first electrode plate 210 is applied to the first external electrode 120 through the plurality of first electrode clips 212. In addition, the second driving voltage provided to the second electrode plate 220 is applied to the second external electrode 130 through the plurality of second electrode clips 222. Accordingly, each of the plurality of U-shaped lamps 100 generates light in response to the first and second driving voltages.

Here, the first driving voltage is a reference voltage, and the second driving voltage is an AC voltage swinging on the basis of the first driving voltage. For example, the first driving voltage is a ground voltage. In addition, the first driving voltage and the second driving voltage may be alternating voltages swinging in phase with each other.

The mold frame 300 has a rectangular plate shape having a predetermined thickness to accommodate the first and second electrode plates 210 and 220. The mold frame 300 is made of an insulating material to electrically insulate the first and second electrode plates 210 and 220.

The mold frame 300 is provided with a first slit 311 for accommodating the first base substrate 211 and a second slit (not shown) for accommodating the second base substrate 221. The first slit 311 is formed by cutting the mold frame 300 from the first side surface 310 to the center portion, and the second slit 321 forms the mold frame 300 on the first side surface 310. It is formed by cutting from the second side surface 320 opposite to the center. Accordingly, the first electrode plate 210 is slid in the first direction D1 in the first slit 311, and the second electrode plate 220 is disposed in the second slit 321. Sliding and received in a second direction D2 opposite to the first direction D1.

In addition, a plurality of first and second openings 312 and 322 are formed in the mold frame 300. The plurality of first openings 312 are formed by cutting the mold frame 300 provided above the first slit 311, and the plurality of second openings 322 are the second slits 321. It is formed by cutting the mold frame 300 provided on the upper portion. Accordingly, the plurality of first electrode clips 212 are exposed on the surface of the mold frame 300 through the plurality of first openings 312, and the plurality of second electrode clips 222 are exposed to the plurality of first electrode clips 212. The surface of the mold frame 300 is exposed through the second opening 322.

As shown in FIG. 1, the plurality of U-shaped lamps 100 input the first and second driving voltages from one interlock 400 through the first and second electrode plates 210 and 220. Receive. Therefore, the backlight assembly 500 may include only one inverter to drive the plurality of U-shaped lamps 100, and as a result, productivity of the backlight assembly 500 may be improved.

In addition, first and second wires 410 and 420 for electrically connecting the plurality of U-shaped lamps 100 and the inverter 400 are provided at one side of the backlight assembly 500. Therefore, leakage current generated by the return wire can be eliminated, and as a result, power consumption of the backlight assembly 500 can be reduced.

3 is a plan view of the backlight assembly illustrated in FIG. 2.

Referring to FIG. 3, the first electrode clip 212 formed on the first electrode plate 210 is adjacent to each other with the second electrode clip 222 formed on the second electrode plate 220. The first light emitting part 111 of the U-shaped lamp 100 is coupled to the first electrode clip 212, and the second light emitting part 112 of the U-shaped lamp 100 is the second electrode clip 222. ) Is combined. Therefore, the first external electrode 120 formed at the first end of the first light emitting part 111 is electrically connected to the first electrode clip 212, and the second end of the second light emitting part 112. The second external electrode 130 formed on the second electrode clip 222 is electrically connected to the second external electrode 130.

A first hole 211a penetrating the first end of the first base substrate 211 is formed in the first electrode plate 210, and the second base plate 221 is formed in the second electrode plate 220. A second hole 221a penetrating the second end is formed. The first and second holes 211a and 221a are provided to be coupled to the first and second wires 410 and 420 illustrated in FIG. 1. Accordingly, the first and second wires 410 and 420 are connected to the first and second electrode plates through first and second screws (not shown) fastened to the first and second holes 211a and 221a. And electrically connected to 210 and 220.

Meanwhile, the separation distance d1 of the second electrode clip 222 adjacent to the first electrode clip 212 is 10 to 50 mm. Since the shortest distances of the first and second light emitting parts 111 and 112 to prevent bright lines from occurring in the backlight assembly 500 are 10 to 50 mm, the separation distance between the first and second electrode clips 212 and 222 may be It is maintained at 10 to 50 mm.

The shortest distance d2 of the first electrode plate 210 and the second electrode plate 220 is 2 mm. When the first and second electrode plates 210 and 220 are spaced at a distance of at least 2 mm, interference does not occur between signals applied to the first and second electrode plates 210 and 220.                     

FIG. 4 is a cross-sectional view taken along the cutting line II ′ of FIG. 3, and FIG. 5 is a cross-sectional view taken along the cutting line II-II ′ of FIG. 3.

4 and 5, the mold frame 300 includes a first locking protrusion 330 protruding from the top surface. The first locking protrusion 330 is in contact with the first ends of the plurality of U-shaped lamps 100 to prevent the plurality of U-shaped lamps 100 from flowing in the longitudinal direction.

Meanwhile, the second electrode plate 220 includes a second locking protrusion 223 protruding from the second base substrate 221. The second locking protrusion 223 is in contact with the second ends of the plurality of U-shaped lamps 100 to prevent the plurality of U-shaped lamps 100 from flowing in the longitudinal direction.

As an example of the present invention, in order to prevent the plurality of U-shaped lamps 100 from flowing in the longitudinal direction, the first and second locking protrusions 330 on the mold frame 300 and the second electrode plate 210. , 223), respectively, are shown. Although not shown in the drawings, as another example of the present invention, both the first and second locking protrusions 330 and 223 may be formed on the second electrode plate 220.

The first electrode plate 210 further includes a first fixing protrusion 211b in which a portion of the first base substrate 211 is cut and protrudes below the bottom surface of the first base substrate 211. In addition, the second electrode plate 220 further includes a second fixing protrusion 221b in which a portion of the second base substrate 221 is cut and protrudes below the bottom surface of the second base substrate 221. .                     

Meanwhile, a first fixing part corresponding to the first fixing protrusion 211b is coupled to a first surface of the mold frame 300 facing the first base substrate 211 accommodated in the first slit 311. The groove 311a is formed. Therefore, the first electrode plate 210 accommodated in the first direction D1 is not separated from the mold frame 300 by the first fixing protrusion 211b.

In addition, a second fixing part corresponding to the second fixing protrusion 221b is coupled to a second surface of the mold frame 300 facing the second base substrate 221 accommodated in the second slit 312. Grooves 312a are formed. Therefore, the second electrode plate 220 accommodated in the second direction D2 is not separated from the mold frame 300 by the second fixing protrusion 221b.

The structures of the first and second electrode plates 210 and 220 may be variously modified without being limited to the structures shown in FIGS. 1 to 5.

6 is an exploded perspective view of a backlight assembly according to another exemplary embodiment of the present invention, and FIG. 7 is a partial cross-sectional view of the backlight assembly illustrated in FIG. 6 taken along a cutting line III-III ′. However, the same reference numerals are given to the same components as those shown in FIG. 1 among the components illustrated in FIGS. 6 and 7, and detailed description thereof will be omitted.

6 and 7, the backlight assembly 1000 according to another embodiment of the present invention may include a plurality of U-shaped lamps 100, first and second electrode plates 210 and 220, and a mold frame 300. , An interleaver 400 and a storage container 600.                     

The storage container 600 includes a bottom surface 610 and a side wall 620 that is bent from the bottom surface 610 and extends in the storage space defined by the bottom surface 610 and the side wall 620. The plurality of U-shaped lamps 100, the first and second electrode plates 210 and 220, and the mold frame 300 are accommodated. Meanwhile, the inverter 400 is seated on the rear surface of the storage container 610.

A diffusion plate 710 and an optical sheet 720 are provided on the plurality of U-shaped lamps 100. The diffusion plate 710 and the optical sheet 720 diffuse light emitted from the plurality of U-shaped lamps 100 to improve luminance uniformity and viewing angle of the backlight assembly 1000. The distance from the center of the first light emitting part 111 (shown in FIG. 1) to the center of the second light emitting part 112 (shown in FIG. 1) is the U-shaped lamp 100 and the diffusion plate 710. 3 times or less of the separation distance.

The reflective plate 730 is further provided between the plurality of U-shaped lamps 100 and the bottom surface 610. The reflector 730 reflects the light leaked from the plurality of U-shaped lamps 100 toward the diffuser plate 710, thereby improving the light efficiency of the backlight assembly 100.

The backlight assembly includes a first mold cover 810 and a plurality of U-shaped lamps 100 covering the first and second ends of the plurality of U-shaped lamps 100 accommodated in the storage container 600. It further comprises a second mold cover 820 to cover the bent portion 113 of the.

8 is a perspective view illustrating in detail the first mold cover illustrated in FIG. 6. In FIG. 8, the structure of the first mold cover 810 having the same structure as that of the second mold cover 820 is described, thereby replacing the description of the structure of the second mold cover 820.

7 and 8, the first mold cover 810 is directed from the upper surface 811 and the upper surface 811 to the bottom surface 610 in parallel with the bottom surface 610 of the storage container 600. It includes an inclined surface 812 extending inclined to. The inclined surface 812 is formed with a receiving groove 812a through which the U-shaped lamp 100 passes. The first mold cover 810 covers an ineffective light emitting area of the U-shaped lamp 100 that is substantially free of light, and does not cover an effective light emitting area of the U-shaped lamp 100 in which light is generated. As a result, brightness uniformity of the backlight assembly 1000 is improved.

On the other hand, the upper surface 611 of the first mold cover 810 is further formed with a step 622 for guiding the storage position of the diffusion plate 710 and the optical sheet 720.

6 and 7, the backlight assembly 1000 further includes a plurality of fixing members 900. The plurality of fixing members 900 will be described in detail later with reference to FIGS. 9 and 10.

In addition, the backlight assembly 1000 may include a plurality of sensing sensors 430 for sensing a tube current of each of the plurality of U-shaped lamps 100 and outputting a sensing signal, and a circuit board on which the plurality of sensing sensors 430 are mounted. 440) further. The plurality of sensing sensors 430 and the circuit board 440 will be described in detail later with reference to FIG. 11.

FIG. 9 is a detailed perspective view illustrating a plurality of fixing members illustrated in FIG. 6, and FIG. 10 is a cross-sectional view taken along the cutting line IV-IV ′ of FIG. 9.                     

9 and 10, each of the plurality of fixing members 900 fixes the support part 910 for supporting the U-shaped lamp 100 and the support part 910 to the reflector plates and the storage containers 730 and 600. And a fixing part 920. The support part 910 has a groove 911 having a predetermined diameter w1 and an opening 912 into which the bent part 113 of the U-shaped lamp 100 is inserted. Here, the diameter w1 of the groove 911 is greater than or equal to the diameter of the bent portion 113, and the diameter w2 of the opening 912 is smaller than the diameter w2 of the groove 911.

When the bent part 113 of the U-shaped lamp 100 is inserted through the opening 912, the bent part 113 of the U-shaped lamp 100 is received in the groove 911. Therefore, the U-shaped lamp 100 is fixed to the support part 910 in a state accommodated in the groove 911.

Here, the support portion 910 is made of a material having a predetermined elasticity, when the bent portion 113 of the U-shaped lamp 100 is inserted into the opening 912, the opening 912 is the U-shaped lamp ( The bent part 113 of 100 is opened so that it can pass.

Meanwhile, the fixing part 920 protrudes from the bottom surface of the support part 910 and is sequentially inserted into the first and second through holes 731 and 611 formed in the reflector plate 730 and the storage container 600. The fixing part 920 is closely coupled to the first and second through holes 731 and 611 so as not to be easily removed from the reflecting plate 730 and the storage container 600. Accordingly, the support part 910 is fixed to the reflector plate 730 and the storage container 600 by the fixing part 920.

Each of the plurality of fixing members 900 may have various forms in addition to the above-described structure.                     

FIG. 11 is a plan view specifically illustrating a positional relationship between a sensing sensor and a U-shaped lamp illustrated in FIG. 6.

Referring to FIG. 11, the plurality of U-shaped lamps 100 extend in the third direction D3, and the circuit board 440 extends in the second direction D2 perpendicular to the third direction D3. It extends, and a plurality of detection sensors 430 are mounted on the circuit board 440.

The plurality of detection sensors 311 are each formed in a plate shape having conductivity, and are disposed to face each of the plurality of U-shaped lamps 100. Each of the plurality of detection sensors 430 outputs a detection signal generated by electromagnetic induction by a magnetic force line changed according to the currents of the plurality of U-shaped lamps 100, thereby preventing leakage currents of the U-shaped lamps 100 facing each other. Detect it.

The circuit board 310 is electrically connected to an inverter 400 (shown in FIG. 6) to provide the sensing signals output from the plurality of sensing sensors 430 to the inverter 400.

The inverter 400 controls the driving of the plurality of U-shaped lamps 100 in response to the detection signal. After the inverter 400 determines whether the U-shaped lamps 100 operate normally by using the detection signal, when the at least one U-shaped lamp 100 does not have a normal leakage current, all U-shaped lamps The lamp driving voltage is not applied to the 100.

Therefore, when the leakage current flowing through the specific lamp is larger or smaller than the reference value, the plurality of U-shaped lamps 100 may be prevented from being operated to prevent damage to the specific lamp.

12 is an exploded perspective view of a liquid crystal display according to another exemplary embodiment of the present invention.

Referring to FIG. 12, the liquid crystal display device 1400 according to another exemplary embodiment includes a backlight assembly 1000 generating light and a display unit 1100 displaying an image of the light.

The display unit 1100 includes a liquid crystal display panel 1110 for displaying an image, data and gate printed circuit boards 1120 and 1130, and data and gate flexible films 1140 and 1150. The data and gate printed circuit boards 1120 and 1130 are electrically connected to the liquid crystal display panel 1110 through the data and gate flexible films 1140 and 1150. Each of the data and gate flexible films 1140 and 1150 converts and outputs various control signals provided from the data and gate printed circuit boards 1120 and 1130 into driving signals for driving the liquid crystal display panel 1110. The data and gate driving chips 1142 and 1152 are mounted.

The liquid crystal display panel 1110 may include a thin film transistor (TFT) substrate 1112, a color filter substrate 1114 coupled to the TFT substrate 1112, and the TFT substrate 1112. And a liquid crystal layer 1116 interposed between the color filter substrate 1114 and the color filter substrate 1114.

The TFT substrate 1112 is a transparent glass substrate on which a switching element TFT (not shown) is formed in a matrix form. Data and gate lines are respectively connected to the source and gate terminals of the TFTs, and a pixel electrode (not shown) made of a transparent conductive material is connected to the drain terminal.

The color filter substrate 1114 is a substrate on which an RGB pixel (not shown), which is a color pixel, and a common electrode (not shown) made of a transparent conductive material are formed.

The liquid crystal display device 1400 further includes a top chassis 1200 and a guide frame 1300. The top chassis 1200 covers the edge of the liquid crystal display panel 1110 and is coupled to face the storage container 600 to fix the liquid crystal display panel 1110 to an upper portion of the backlight assembly 100. The top chassis 1200 prevents the liquid crystal display panel 1110 from being damaged by an external impact and prevents the liquid crystal display panel 1110 from being separated from the backlight assembly 1000.

The guide frame 1300 is disposed between the backlight assembly 1000 and the liquid crystal display panel 1110 to fix the diffuser plate 710 and the optical sheet 720 at a designated position, and the liquid crystal display. Guide the storage position of the panel 1110.

According to such a backlight assembly and a display device having the same, since only one inverter for providing the first and second driving voltages is provided in the plurality of U-shaped lamps, productivity of the backlight assembly may be improved.

In addition, the first and second wires for electrically connecting the plurality of U-shaped lamps and the inverter are provided at one side of the backlight assembly, thereby eliminating the leakage current generated by the return wire, thereby reducing the power consumption of the backlight assembly. Can be saved.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (23)

It is formed of a U-shaped lamp tube and the first and second external electrodes respectively formed to surround the outer surface of the first and second ends of the U-shaped lamp tube to receive the first and second driving voltage, respectively, to generate light A plurality of U-shaped lamps; An inverter configured to output the first and second driving voltages in response to external power supplied from the outside; A first electrode plate coupled to the first external electrode to provide the first driving voltage from the inverter to the first external electrodes; And A second electrode plate coupled to the second external electrode to provide the second driving voltage from the inverter to the second external electrodes, The first electrode plate, A first base substrate extending in the direction in which the first and second external electrodes of the U-shaped lamps line up and receiving the first driving voltage from the inverter; And A plurality of first electrode clips protruding from the first base substrate and respectively coupled to corresponding first ends of the U-shaped lamps to provide the first driving voltage to the first external electrodes; The second electrode plate, A second base substrate disposed in parallel with the first electrode plate and receiving the second driving voltage from the inverter; And A plurality of second electrode clips protruding from the second base substrate and respectively coupled to corresponding second ends of the U-shaped lamps to provide the second driving voltage to the second external electrodes; And the first electrode plate and the second electrode plate are spaced apart from each other in a direction perpendicular to the direction in which the first and second external electrodes line up. delete The backlight assembly of claim 1, further comprising a mold frame accommodating the first and second electrode plates. The method of claim 3, wherein the mold frame is made of an insulating material, The mold frame is a backlight assembly, characterized in that the first and second coupling portion is coupled to the first and second electrode plate. The method of claim 4, wherein the first coupling portion is made of a first slit in which the first base substrate is accommodated in a sliding manner, And the second coupling part comprises a second slit in which the second base substrate is accommodated in a sliding manner. The method of claim 5, wherein the first slit is formed by cutting the mold frame from the first side to the central side, The second slit is formed by cutting the mold frame from the second side opposite to the first side toward the center side. The method of claim 6, wherein the mold frame is formed with first and second openings for exposing the first and second electrode clips of the first and second electrode plate, And the first and second openings are formed by cutting the mold frame provided on the first and second slits. The method of claim 3, wherein the first and second electrode plates further include first and second fixing protrusions protruding from the first and second base substrates, respectively. And the mold frame has first and second fixing grooves for receiving the first and second fixing protrusions, respectively, to fix the first and second base substrates from being separated from the mold frame. The backlight assembly of claim 3, further comprising a first locking protrusion protruding from the mold frame to prevent the U-shaped lamp from flowing in the longitudinal direction. The backlight assembly of claim 1, wherein the second electrode plate further includes a second locking protrusion protruding from the second base substrate to prevent the plurality of U-shaped lamps from flowing in the longitudinal direction. The method of claim 1, wherein the first electrode clip is interposed between two adjacent second electrode clips, The first electrode clip is a backlight assembly, characterized in that spaced apart from the adjacent two second electrode clip at a distance of 10 ~ 50mm. The backlight assembly of claim 1, wherein a distance between the first electrode plate and the second electrode plate is 2 mm or more. According to claim 1, wherein the U-shaped lamp tube, A first light emitting part extending in a predetermined direction; A second light emitting part extending in parallel with the first light emitting part; And And a curved portion bent with a predetermined curvature to connect the first and second light emitting portions. 15. The backlight assembly of claim 13, further comprising a plurality of fixing members coupled to the bent portion for fixing the plurality of U-shaped lamps at a designated position. 15. The method of claim 13, further comprising a diffuser plate for diffusing light emitted from the U-shaped lamp, The distance from the center of the first light emitting portion to the center of the second light emitting portion is a backlight assembly, characterized in that less than three times the separation distance of the U-shaped lamp and the diffusion plate. According to claim 13, Receiving vessel for receiving the plurality of U-shaped lamps; A first mold cover covering first and second ends of the plurality of U-shaped lamps accommodated in the storage container; And And a second mold cover covering the bends of the plurality of U-shaped lamps. The backlight assembly of claim 1, wherein the first driving voltage is a reference voltage, and the second driving voltage is an AC voltage swinging based on the reference voltage. The backlight assembly of claim 1, wherein the first and second driving voltages are alternating voltages swinging in phase with each other. A display panel displaying an image using light; And A backlight assembly provided below the display panel and configured to generate the light and provide the light to the display panel; The backlight assembly, It consists of a U-shaped lamp tube and the first and second external electrodes respectively formed to surround the outer surfaces of the first and second ends of the U-shaped lamp tube and receives the first and second driving voltages, respectively, to generate light. A plurality of U-shaped lamps; An inverter configured to output the first and second driving voltages in response to external power supplied from the outside; A first electrode plate coupled to the first external electrode to provide the first driving voltage from the inverter to the first external electrode; And A second electrode plate coupled to the second external electrode to provide the second driving voltage from the inverter to the second external electrode; The first electrode plate, A first base substrate extending in the direction in which the first and second external electrodes of the U-shaped lamps line up and receiving the first driving voltage from the inverter; And A plurality of first electrode clips protruding from the first base substrate and respectively coupled to corresponding first ends of the U-shaped lamps to provide the first driving voltage to the first external electrodes; The second electrode plate, A second base substrate disposed in parallel with the first electrode plate and receiving the second driving voltage from the inverter; And A plurality of second electrode clips protruding from the second base substrate and respectively coupled to corresponding second ends of the U-shaped lamps to provide the second driving voltage to the second external electrodes; And the first electrode plate and the second electrode plate are spaced apart from each other in a direction perpendicular to the direction in which the first and second external electrodes line up. delete The display device of claim 19, further comprising a mold frame made of an insulating material to accommodate the first and second electrode plates. 20. The display device of claim 19, further comprising: a storage container accommodating the backlight assembly and the display panel; And And a top chassis coupled to the storage container and covering a portion of the display panel to fix the display panel to the storage container. The display device of claim 22, wherein the inverter is disposed on a rear surface of the storage container.

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