KR20060005157A - Backlight assembly and display apparatus having the same - Google Patents

Abstract

Disclosed are a backlight assembly and a display device having the same to reduce manufacturing costs. The plurality of lamps have a lamp tube and external electrodes formed on both ends of the lamp tube, and the first and second lamp holders are formed at both ends of the lamps to fix the lamps, and apply a predetermined power supply voltage to the external electrodes. The first container is formed under the lamps to receive the lamps, and the lamp reflector is formed between the first container and the lamps to cover the external electrodes of the lamps, and reflects the light leaking from the lamps. The first storage container and the external electrode are insulated. Accordingly, the lamp reflector may be extended to insulate the lamp electrode portion and the bottom sash, so that a separate component for insulation between the lamp electrode portion and the bottom sash is unnecessary, thereby reducing manufacturing costs.

Description

BACKLIGHT ASSEMBLY AND DISPLAY APPARATUS HAVING THE SAME}

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

FIG. 2 is a cross-sectional view taken along line II ′ of FIG. 1.

3 is a perspective view showing another example of the configuration of the first and second lamp holder and the lamp reflector shown in FIG.

4 is an exploded perspective view illustrating a liquid crystal display having the backlight assembly illustrated in FIG. 1.

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

100: lamp unit 200: first lamp holder

300: second lamp holder 400: lamp reflector

500: bottom chassis 600: diffuser plate

700: optical sheet 800: first mold frame

810: second mold frame 900: adhesive member

The present invention relates to a display device, and more particularly, to a backlight assembly and a display device having the same that can reduce manufacturing costs.

Recently, as the size of the display device increases, the size of the display panel and the backlight assembly also increases. As a result, the display device has widely adopted a direct type backlight assembly having a plurality of lamps arranged side by side at the rear of the display panel to provide light directly to the display panel.

Such a direct type backlight assembly requires a large number of lamps for high brightness and uniformity of brightness, and also requires a large number of inverters for driving the plurality of lamps, resulting in high manufacturing costs.

In order to solve this problem, recently, an external electrode lamp capable of driving in parallel capable of driving a plurality of lamps with one inverter has been developed. The external electrode lamp has an external electrode formed by surrounding both ends of the lamp tube into which the discharge gas is injected to the outside, and generates light in response to a driving voltage provided from the inverter.

The bottom chassis for accommodating the lamps is generally formed of a metallic material. Therefore, when the external electrode lamp is accommodated in the bottom chassis, insulation between the external electrode and the bottom chassis is required.

As such, a lower mold frame is formed between the external electrode and the bottom chassis to insulate the external electrode of the external electrode lamp from the bottom chassis. In addition, the row mold frame also serves to fix the electrode of the external electrode lamp.

However, the backlight assembly having the above-described configuration has a problem in that a manufacturing cost increases because a low mold frame, which is a separate component for insulating the electrode portion of the external electrode lamp and the bottom chassis, is formed.

Accordingly, the present invention is to solve the above problems, an object of the present invention to provide a backlight assembly that can insulate the bottom portion and the electrode portion of the external electrode lamp while reducing the manufacturing cost.

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

A plurality of lamps of the present invention for achieving the above object has a lamp tube and an external electrode formed on both ends of the lamp tube, the first and second lamp holders are formed at both ends of the lamps, respectively, And a predetermined power supply voltage is applied to the external electrode, and a first storage container is formed under the lamps to accommodate the lamps, and a lamp reflector may cover the external electrodes of the lamps. A light is formed between the storage container and the lamps to reflect light leaking from the lamps and to insulate the first storage container and the external electrode.

According to another aspect of the present invention, there is provided a backlight assembly including a plurality of lamps having external electrodes formed at both ends, a first storage container formed under the lamps to receive the lamps, and the outside of the lamps. A lamp reflector formed between the first accommodating container and the lamps to cover an electrode, reflecting light leaking from the lamps, and insulating the first accommodating container and the external electrode; The unit displays an image using the light provided from the backlight assembly.

According to such a backlight assembly and a display device having the same, the lamp reflector is extended to insulate the lamp electrode portion from the bottom chassis, so that a separate component is not required to insulate the lamp electrode portion from the bottom chassis. Can be reduced.

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

1 is an exploded perspective view showing a backlight assembly according to the present invention, Figure 2 is a cross-sectional view taken along the line II 'of FIG.

1 and 2, the backlight assembly 1000 according to the present invention includes a lamp unit 100, a first lamp holder 200, a second lamp holder 300, a lamp reflector 400, and a bottom chassis ( 500).

Here, the lamp unit 100 is composed of a plurality of lamps 110 arranged in parallel. Each of the plurality of lamps 110 includes an external electrode lamp having a rod-shaped lamp tube 120 and first and second external electrodes 130 and 140 formed at both ends of the lamp tube 120, respectively. (External Electrode Fluorescent Lamp: EEFL).

Discharge gas (not shown) is injected into the lamp tube 110, and the first and second external electrodes 130 and 140 are formed of a conductive material to surround the outside of the lamp tube 120. . The lamp 110 generates light in response to the first and second driving voltages provided through the first and second external electrodes 130 and 140 from the outside.

The first lamp holder 200 extends from the first fixing plate 210 and the first fixing plate 210 so as to fix one end of the plurality of lamps 110. Is made of.

The first clip part 220 is formed corresponding to the positions of the first external electrodes 130 of the plurality of lamps 110, and is formed to be fitted with the first external electrodes 130. One end of 110 is fixed. In addition, the first fixing plate 210 connects the first clip part 220 to each other, and serves to apply the first driving voltage provided from the outside to the first external electrodes 130 of the plurality of lamps 110. Do this.

Meanwhile, the second lamp holder 300 extends from the second fixing plate 310 and the second fixing plate 310 so as to fix the other ends of the plurality of lamps 110. Is made of.

The second clip part 320 is formed corresponding to the positions of the second external electrodes 140 of the plurality of lamps 110, and is formed to be fitted with the second external electrodes 140. The other end of the 110 is fixed. In addition, the second fixing plate 310 connects the second clip part 320 to each other, and serves to apply the second driving voltage provided from the outside to the second external electrodes 140 of the plurality of lamps 110. Do this.

The lamp reflector 400 is formed under the lamp unit 100 to reflect the light leaked downward from the plurality of lamps 110 upward.

In addition, the bottom chassis 500 is configured under the lamp reflector 110 to accommodate the lamp reflector 400, the first lamp holder 200, the second lamp holder 300, and the lamp unit 100. In this case, the bottom chassis 500 is formed of a metal material.

The lamp reflector 400 not only reflects the light leaked downward, but also insulates the bottom chassis 500 from the first and second external electrodes 230 and 140 of the plurality of lamps 110.

That is, the lamp reflector 400 has the same horizontal length as the lengths of the plurality of lamps 110 and has the same length as the lengths of the first and second fixing plates 200 and 300. Therefore, the lamp reflector 400 has a formation area capable of covering not only the lamp tubes 120 of the plurality of lamps 110 but also the first and second external electrodes 130 and 140. Accordingly, the lamp reflector 400 is also positioned between the first and second fixing plates 210 and 310 that secure the first and second external electrodes 130 and 140 and the bottom chassis 500.

In this case, the lamp reflector 400 is formed of polyethylene terephthalate (PET) which is a material having excellent insulation. The polyethylene terephthalate has an electrical resistivity of about 2 × 10 ¹⁵ [ohm · cm].

As described above, since the lamp reflector 400 is extended and the lamp reflector 400 is also positioned between the bottom chassis 500 and the first and second fixing plates 210 and 310, the bottom chassis 500 and the first and second fixation plates are positioned. 210 and 310 are insulated from each other by the lamp reflector 400. That is, the bottom chassis 500 and the first and second external electrodes 130 and 140, which are electrode parts of the lamp 110, are insulated from each other.

Meanwhile, the backlight assembly 1000 according to the present invention further includes a first mold frame 600, a second mold frame 610, a diffusion plate 700, and optical sheets 800.

The first mold frame 600 is formed at a position corresponding to the first lamp holder 200, and the second mold frame 610 is formed at a position corresponding to the second lamp holder 300.

Here, the first mold frame 600 is formed to be inclined at a predetermined angle in the direction of the lamp tube 120 to cover the first external electrodes 130 of the plurality of lamps 110, the plurality of lamps 110 A first sidewall 604 having an insertion hole 602 into which the lamp 110 is inserted, and formed at an upper end of the first sidewall 604 to correspond to the position of the diffuser plate 700 and the optical sheet 800. ) Is formed of a stepped 606 on which it is seated and a second sidewall 608 extending vertically from the top of the stepped 606 in the direction of the bottom chassis 500.

In this case, the first mold frame 600 forms a predetermined storage space therein by the first sidewall 604, the step 606, and the second sidewall 608, and a first lamp holder in the storage space. 200 is stored.

In addition, the first mold frame 606 protrudes from a portion of the first sidewall 604 and the step 606 toward the first lamp holder 200 accommodated in the storage space, so that the first lamp holder 200 may be opened. It further includes a fixing member 609 for pressing in the direction of the lamp reflector 400. In this case, the first lamp holder 200 is pressed by the fixing member 609 and fixed to the lamp reflector 400.                     

In this case, the fixing member 609 protrudes from the first sidewall 604 and the step 606, but may be protruded from the first side wall 604 or the step 606.

On the other hand, since the second mold frame 610 has the same configuration as the first mold frame 600, a detailed description thereof will be omitted.

That is, the second mold frame 610 has a predetermined storage space therein and accommodates the second lamp holder 300 in the storage space. In addition, the second mold frame 610 presses the second lamp holder 300 accommodated in the inner storage space toward the lamp reflector 400.

As such, the first and second lamp holders 200 and 300 are urged toward the lamp reflector 400 by the fixing members 609 formed in the first and second mold frames 600 and 610. 200 and 300 are fixed to the lamp reflector 400.

In addition, an adhesive member 900 is formed below the first lamp holder 200 and the second lamp holder 300 to improve the fixing force of fixing the first and second lamp holders 200 and 300 to the lamp reflector 400. Let's do it. At this time, the adhesive member 900 is a double-sided tape.

The diffusion plate 700 and the optical sheet 800 are sequentially mounted on the first and second mold frames 600 and 610 to diffuse light generated from the plurality of lamps 110 and to provide optical characteristics of the light. To improve.

In the above, the first and second lamp holders 200 and 300 are fixed to the lamp reflector 400 by the fixing member 609 and the adhesive member 900 of the first and second mold frames 600 and 610. The first and second lamp holders 200 and 300 may be fixed to the lamp reflector 400 by various other methods.

3 is a perspective view showing another example of the configuration of the first and second lamp holder and the lamp reflector shown in FIG.

As shown in FIG. 3, the first lamp holder 1100 extends from the first fixing plate 1110 and the first fixing plate 1110 to fix the first external electrode 130 of the lamp of FIG. 1. Made of a first clip portion 1120. In this case, the first lamp holder 1100 further includes a first fixing hole 1130 formed in the first fixing plate 1110 between the first clip parts 1120.

In addition, the second lamp holder 1200 may be a second clip part 1220 protruding from the second fixing plate 1210 and the second fixing plate 1210 to fix the second external electrode 140 of the lamp. Is done. In this case, the second lamp holder 1200 further includes a second fixing hole 1230 formed in the second fixing plate 1210 between the second clip parts 1220.

On the other hand, the lamp reflector 1300 is formed at a position corresponding to the first fixing hole 1230, the first insertion hole 1310 and the second fixing hole 1230 inserted into the first fixing hole 1130. The second insertion hole 1320 is formed at a corresponding position and is inserted into the second fixing hole 1230.

In the above configuration, the first insertion hole 1310 is inserted into the first fixing hole 1130 of the first lamp holder 1100 and the second fixing hole 1230 of the second lamp holder 1200. As the insertion cone 1320 is inserted, the first and second lamp holders 1100 and 1200 are fixed to the lamp reflector 1300.                     

4 is an exploded perspective view illustrating a liquid crystal display having the backlight assembly illustrated in FIG. 1.

As shown in FIG. 4, the liquid crystal display according to the present invention includes a display unit 2000 for displaying an image and a backlight assembly 1000 for providing light to the display unit 2000.

The display unit 2000 includes a liquid crystal display panel 2100 constituting a screen, a gate side and a data side printed circuit board 2200 and 2300 for driving the liquid crystal display panel 2100.

The backlight assembly 1000 has the same configuration as shown in FIG. 1.

That is, the backlight assembly 100 may include a lamp unit 100 including a plurality of lamps 110 for generating light, first and second lamp holders 200 and 300 for fixing the lamps 110 to a designated position, It includes a lamp reflector 400 and a bottom chassis 500 for reflecting the light.

The first lamp holder 200 includes a first clip plate 220 into which the first fixing plate 210 and the first external electrode 130 of the lamp 110 are fitted. The first fixing plate 210 applies a first driving voltage provided from the outside to the first external electrode 130 of the lamp 110.

The second lamp holder 300 includes a second clip plate 320 into which the second fixing plate 310 and the second external electrode 140 of the lamp 110 are fitted. The second fixing plate 310 applies a second driving voltage provided from the outside to the second external electrode 140 of the lamp 110.

The lamp reflector 400 not only reflects the light leaking from the lamp unit 100 but also insulates the lamp 110 from the bottom chassis 500.

That is, the lamp reflector 400 has a length equal to the length of the plurality of lamps 110 and has a length equal to the length of the first lamp holder 200 and the second lamp holder 300. Therefore, the lamp reflector 400 has a formation area capable of covering not only the lamp tubes 120 of the plurality of lamps 110 but also the first and second external electrodes 130 and 140.

Therefore, the lamp reflector 400 is formed of a material having excellent insulation, and the first lamp holder 200, the second lamp holder 300, and the bottom chassis 500 fixing the first and second external electrodes 130 and 140. It is also located between). Accordingly, the bottom chassis 500 and the first and second external electrodes 130 and 140 of the plurality of lamps 110 are insulated from each other.

In addition, the backlight assembly 1000 may include a diffusion plate 700 that diffuses the light, an optical sheet 800 that is provided on the diffusion plate 700, and improves optical characteristics of the light. The apparatus further includes first and second mold frames 600 and 610 accommodating the optical sheet 800 therein and accommodating the first and second lamp holders 200 and 300 therein.

Here, the first and second mold frames 600 and 610 are accommodated in predetermined storage spaces formed therein.

In addition, the first and second mold frames 600 and 610 may press the first and second lamp holders 200 and 300 stored therein to fix the first and second lamp holders 200 and 300 to the lamp reflector 400. And a fixing member 609. At this time, the adhesive member 900 is formed below the first and second fixing plates 210 and 310 of the first and second lamp holders 200 and 300 to fix the lamp reflecting plate 400 and the first and second lamp holders 200 and 300. To improve.

The liquid crystal display device is formed on the optical sheet 800 to fix the upper mold frame 2400 and the display unit 200 to support the liquid crystal display panel 2100 to the backlight assembly 1000. A top chassis 2500 is further included.

Although the present invention has been described using a liquid crystal display as an example, it can be applied to various other display devices.

As described above, the present invention forms a lamp reflector to cover the lower portion of the external electrodes of the lamps, thereby insulating the bottom chassis and the external electrodes of the lamps. The present invention also fixes the lamps to the lamp reflector by pressing external electrodes of the lamps by a mold frame accommodating a lamp holder for fixing the lamps in an inner space.

Therefore, since the present invention insulates the external chassis and the bottom chassis of the lamps by a lamp reflector, a separate component for insulation, such as a low mold frame, is unnecessary, thereby reducing the manufacturing cost.

Although described with reference to the embodiments described above, those skilled in the art or those skilled in the art without departing from the spirit and scope of the invention described in the claims below It will be understood that various modifications and changes can be made.

Claims (12)

A plurality of lamps having a lamp tube and external electrodes formed outside both ends of the lamp tube; First and second lamp holders formed at both ends of the lamps to fix the lamps, and to apply a predetermined power voltage to the external electrode; A first accommodation container formed under the lamps to accommodate the lamps; And A lamp reflector formed between the first storage container and the lamps to cover the external electrodes of the lamps, reflecting light leaking from the lamps, and insulating the first storage container and the external electrode; Backlight assembly comprising a. The backlight assembly of claim 1, wherein the lamp reflector is formed of an insulating material. The backlight assembly of claim 2, wherein the insulation material is polyethylene terephthalate (PET). 4. The backlight assembly of claim 3, wherein the polyethylene terephthalate has an electrical resistivity of about 2x10 ¹⁵ [ohmcm]. The method of claim 1, A second accommodating container accommodating the first and second lamp holders therein and fixing the first and second lamp holders to the lamp reflector; And And a diffusion member formed on the second storage container to diffuse the light. The method of claim 5, wherein the second storage container A first sidewall formed at an angle to cover the external electrodes of the lamps and having an insertion hole into which the external electrodes are inserted; A stepped portion formed on an upper end of the first sidewall and on which the diffusion member is seated; And And a second sidewall extending vertically from an upper end of the step in the direction of the first storage container. The backlight assembly of claim 6, further comprising a fixing member protruding from the second storage container toward the first or second lamp holder accommodated therein to press the first or second lamp holder. The lamp holder of claim 1, wherein the lamp holder is A clip part into which the external electrodes of the lamps are fitted; And And a fixing plate connecting the clip parts to each other and providing a driving voltage to the external electrode. The backlight assembly of claim 8, further comprising an adhesive member formed under the fixing plate to fix the fixing plate to the lamp reflector. The lamp holder of claim 1, wherein the lamp holder is A clip part into which the external electrodes of the lamps are fitted; A fixing plate connecting the clip parts to each other and providing a driving voltage to the external electrode; And And a fixing hole formed in the fixing plate between the clip parts. The backlight assembly of claim 10, wherein the lamp reflector further comprises an insertion cone formed at a position corresponding to the fixing hole and inserted into the fixing hole. A plurality of lamps having external electrodes formed at both ends, a first storage container formed under the lamps to receive the lamps, and between the first storage container and the lamps so as to cover the external electrodes of the lamps; A backlight assembly formed on the reflector to reflect light leaking from the lamps, and including a lamp reflector to insulate the first container and the external electrode; And And a display unit configured to display an image using light provided from the backlight assembly.

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