KR20080046842A - Light emitting diode block and backlight unit and liquid crystal display having the same - Google Patents

Abstract

A light emitting diode block assembly and a back light unit and an LCD(Liquid Crystal Display) by using the same are provided to design a connection pad for connecting with plural light emitting diode blocks in order not to cover the light beam emitted from a light emitting diode. A light emission diode block includes a light emitting diode(160) mounted on a substrate(100). A connection member(150) is formed at least a side of the substrate. When connecting plural light emission diode blocks, a connection pad connects adjacent connection members with each other. The connection pad includes a base plate. A connection member is protruded from a side of the base plate. An electrode connection member is mounted on a side of the base plate. The connection member includes a hook. The connection member includes an electrode member connected electrically with the light emission diode. The electrode members of adjacent light emission diode blocks are connected with each other by the electrode connection member. The electrode connection member includes a leaf spring.

Description

Light emitting diode block assembly and backlight unit and liquid crystal display using same

1 is a plan view of a light emitting diode block according to the present invention;

2 is a perspective view of a connection pad according to the present invention;

Figure 3 is a schematic side view showing a state after connection of the connection pad and the LED block according to the present invention.

4 is a schematic exploded perspective view of a backlight unit according to the present invention;

5 is a schematic cross-sectional view showing a state after assembly of the backlight unit according to the present invention;

6 is a schematic exploded perspective view of a liquid crystal display device according to the present invention;

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

100: substrate 120: through hole

140: electrode portion 160: light emitting diode

200: base plate 220: connecting member

240: electrode connection portion 300: light emitting diode block

320: light emitting diode block assembly 310: connection pad

The present invention relates to a backlight unit and a liquid crystal display device using the light emitting diode block assembly, and more particularly, to a light emitting diode block assembly to which a light emitting diode block assembly is connected as a connecting member, and a backlight unit and a liquid crystal display device using the same.

 Recently, flat panel displays such as liquid crystal displays (LCDs) and plasma display panels (PDPs) are rapidly developing in place of cathode ray tubes (CRTs).

Among such flat panel display devices, the liquid crystal display device does not have self-luminous light unlike a plasma display device and the like, and requires a light source. Accordingly, the liquid crystal display device may include various light sources according to the screen display method. For example, the backlight unit including the light source may be disposed behind the liquid crystal display panel.

As a light source of the backlight unit, a point light source such as a light emitting diode (LED) 160 is generally used, an electroluminescent lamp (EL), or a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp). Use a line light source such as CCFL.

Among the light sources, when the backlight unit using the light emitting diode is applied to a large liquid crystal display device of 40 inches or more, a large number of light emitting diode blocks are mounted on the substrate due to the limitation of the SMT machine that mounts the light emitting diode on the substrate. It is used as a light source of the backlight unit by connecting two dogs.

In this case, the light emitting diode block according to the related art forms a connector in which wiring is connected to the light emitting diode block when the plurality of light emitting diode blocks are connected to connect the block and the block.

In the connection method using the connector method, a connector mounting process including a wiring must be performed before connecting the light emitting diode block, and problems such as contact instability and disconnection of wire may occur depending on the connector. In addition, since the connector and the wiring having a certain volume must be accommodated in the inner space of the backlight unit having the limited space, there is a problem that the wiring of the connector should be arranged together with the utilization of the internal space.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a reliable and bulky light emitting diode block assembly, a backlight unit and a liquid crystal display using the same.

In order to achieve the above object, the present invention provides a light emitting diode block including a substrate, a light emitting diode mounted on the substrate, a connection part formed on at least one side of the substrate, and a plurality of light emitting diode blocks. It provides a light emitting diode block assembly comprising a connection pad for connecting the.

In this case, the connection pad may include a base plate, a connection member protruding on one surface of the base plate, and an electrode connection part mounted on one surface of the base plate, and the connection member may include a hook.

The connecting member may have a stepped shape in which an upper region close to the base plate is larger in diameter than the lower region, and the diameter of the upper region is larger than the diameter of the through hole.

The connection part may include a through hole, and the light emitting diode block may be coupled to an adjacent light emitting diode block by coupling the connection member and the through hole.

In addition, it is preferable that the connection part includes an electrode part electrically connected to the light emitting diode, and the electrode parts of the light emitting diode blocks adjacent to each other by the electrode connection part are electrically connected to each other.

The electrode connection part may include a leaf spring.

In addition, the light emitting diode may further include a reflective member formed between the light emitting diodes on the substrate, and the reflective member may be fixed by the connection pad. In this case, the base plate is preferably formed of the same material as the reflective member.

The present invention also provides a light emitting diode block including a substrate, a light emitting diode mounted on the substrate, a connecting portion formed on at least one side of the substrate, and a connection for connecting between adjacent connecting portions when the plurality of light emitting diode blocks are connected. It provides a backlight unit comprising a light emitting diode block assembly having a pad. In addition, the backlight unit according to the present invention may further include an accommodating member accommodating the light emitting diode block assembly and the coupling hole is formed, and the connection member of the connection pad is coupled to the coupling hole through the through hole of the light emitting diode block. Can be.

The present invention also provides a light emitting diode block including a substrate, a light emitting diode mounted on the substrate, a connecting portion formed on at least one side of the substrate, and a connection for connecting between adjacent connecting portions when the plurality of light emitting diode blocks are connected. A backlight unit comprising a light emitting diode block assembly having a pad and a liquid crystal display panel for displaying an image by receiving light from the backlight unit.

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

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a plan view of a light emitting diode block according to the present invention, FIG. 2 is a perspective view of a connection pad according to the present invention, and FIG. 3 is a schematic side view showing a state after connection of the connection pad and the light emitting diode block according to the present invention. .

As shown in FIG. 1, a light emitting diode block according to the present invention includes a light emitting diode 160, a substrate 100 for mounting the light emitting diode 160, and a connection part formed at one side and the other side of the substrate 100. And 150.

The light emitting diode 160 is a light source of a light emitting diode block according to the present invention, a compound semiconductor laminate structure having a pn junction structure, a light emitting chip using a phenomenon of emitting light by recombination of minority carriers (electrons or holes), and the light emitting It may include a base member for mounting the chip, and an external power input member for applying external power to the light emitting chip. The present invention may use a plurality of light emitting diodes 160 as described above to satisfy the luminance required by the liquid crystal display.

The substrate 100 is for mounting the light emitting diode 160 and applying an external power, and may include a printed circuit board (PCB).

In the substrate 100 according to the present invention, a predetermined wiring is formed to mount a plurality of light emitting diodes 160 and to apply external power thereto, and the plurality of light emitting diodes 160 are electrically connected to each other by the wiring. Can be connected. In addition, the substrate 100 according to the present invention includes a connection portion 150 for connecting a plurality of light emitting diode blocks.

The connection part 150 is for connecting a plurality of light emitting diode blocks and connecting power to each other. One set of a through hole 120 and an electrode part 140 on one side and the other side of the substrate 100 is provided. It can be formed as.

The through hole 120 is coupled with a connection pad to be described later when combining a plurality of light emitting diode blocks to provide a fastening force. In the present invention, the through holes 120 include first through fourth through holes 121, 122, 123, and 124. can do. In this case, each of the first through fourth through holes 121, 122, 123, and 124 is composed of three through holes, and the first and second through holes 121 and 122 are disposed on one side of the substrate 100. The third and fourth through holes 123 and 124 may be formed to be spaced apart from each other on the other side of the substrate 100. However, the present invention is not limited thereto, and the through holes 120 may be formed on one side and the other side of the substrate 100, respectively. Of course, two or more through holes 120 may be formed on one side and the other side of the substrate 100, respectively. In addition, the through hole 120 is preferably formed of a metal because it must have a coupling force with the connection member of the connection pad. In addition, the through hole 120 is preferably formed on the surface of the substrate 100 to be coupled to the connection member of the connection pad. However, the present invention is not limited thereto, and the through hole 120 may be formed in the substrate 100.

The electrode unit 140 is for connecting power to the light emitting diodes 160 mounted on the respective light emitting diode blocks when the plurality of light emitting diode blocks are combined. The first to fourth electrode parts 141, 142, 143, 144). In this case, the first electrode part 141 includes first to fourth electrodes 141a to 141d, and the second electrode part 142 includes fifth to eighth electrodes 142a to 142d. In addition, the third electrode part 143 includes ninth through twelfth electrodes 143a through 143d, and the fourth electrode part 144 includes thirteenth through sixteenth electrodes 144a through 144d.

The electrode unit 140 extends from the wiring formed on the substrate 100, and forms the electrode unit 140 by exposing the wiring to one side and the other side of the substrate 100. In addition, the electrode 140 may be formed in a concave shape in order to be coupled to the electrode connecting portion of the connection pad to be described later. That is, a recess 210 having a concave shape may be formed in the substrate 100, and an electrode extending from a wiring may be provided on the bottom surface of the groove 210. In addition, the electrode unit 140 may be formed adjacent to the through-hole 120 to increase the fastening force when coupled with the connection pad.

In the present invention, the first to fourth electrode parts 141, 142, 143, and 144 are described as having four electrodes, respectively, but the present invention is not limited thereto. The number of electrodes included in the 142, 143, and 144 may be four or less or more. For example, when the first and second electrode portions 141 and 142 are formed on one side of the substrate 100, and the third and fourth electrode portions 143 and 144 are formed on the other side of the substrate 100. The first to fourth electrode units 141, 142, 143, and 144 may each include one electrode to connect power to a plurality of light emitting diode blocks. Of course, the number of electrode portions 140 may also be flexible.

Referring to Figure 2, the present invention is shown a connection pad 310 for connecting the connection portion 150 between the LED block having the structure as described above.

The connection pad 310 is for coupling the light emitting diode block according to the present invention, and as shown in FIG. 2, the base plate 200, the connection member 220 and the electrode connection part formed on the base plate 200. 240.

The connection member 220 is coupled to the through hole 120 to provide a fastening force, and includes first and second connection members 221 and 222. In this embodiment, a hook is used as the connection member 220.

In addition, the first connection member 221 may be connected to the through hole 120 of one LED block, and the second connection member 222 may be connected to the through hole 120 of another LED block. . In addition, the through-hole 120 formed in the connection member 220 and the substrate 100 for this purpose is preferably formed in a shape corresponding to each other. At this time, it is preferable that a plurality of first and second connection members 221 and 222 are each formed to increase the fastening force with the light emitting diode block. In the present exemplary embodiment, three first and second connecting members 221 and 222 are formed. Of course, the connecting member 220 may be formed in three or less or three or more on one side and the other side of the base plate 200, respectively.

In addition, the connection member 220 according to the present embodiment gives a step to the area connected to the base plate 200, the connection member 220 is inserted into the through-hole of the substrate 100 and then foreign matters in the hole It can prevent the inflow. At this time, the connecting member 220 is larger in diameter than the lower portion by the step, the diameter of the upper portion is preferably larger than the diameter of the through hole of the substrate 100, the diameter of the lower portion penetrates the substrate 100 It is desirable to be smaller than or equal to the diameter of the hole.

As shown in FIG. 3, the electrode connector 240 connects the one LED block and the electrode 140 of the other LED block and the other LED block when the other LED block is connected. To fourth electrode connection parts 240a to 240d. The first to fourth electrode connection parts 240a to 240d may be connected to correspond to the electrode part 140 of the electrode part 140. In addition, the electrode connecting portion 240 preferably has elasticity so that it can be more firmly connected when connected to the electrode portion 140 of the substrate 100, accordingly in the present embodiment as the electrode connecting portion 240 Let's use Spring. In this case, a portion of the electrode connection portion 240 in contact with the electrode portion 140 is based on the surface contact, but is not limited thereto, and a protrusion may be partially formed on the portion to be contacted to increase the contact force.

In the present embodiment, the electrode connecting portion 240 is formed on the base plate 200 to form a groove 210 corresponding to the electrode connecting portion 240, and then the electrode connecting portion 240 is mounted on the groove 210. Can be. In this case, a protrusion, for example, a hook is formed in the groove 210 on which the electrode connector 240 is to be mounted, and a through hole is formed in the electrode connector 240 to form the electrode connector 240 in the base plate 200. I can attach it. Of course, this is only an example of a method of mounting the electrode connecting portion 240 to the base plate 200, but is not limited thereto, and the electrode connecting portion 240 is mounted to the base plate 200 without departing from the object of the present invention. You can use any method you can.

Meanwhile, in the present exemplary embodiment, the electrode connection part 240 is described as including first to fourth electrode connection parts 240a to 240d. However, the present invention is not limited thereto, and the electrode part 140 formed on the substrate 100 is provided. According to the number of electrodes included in the number of the electrode connection portion 240 may be changed fluidly.

The base plate 200 is for supporting the connecting member 220 and the electrode connecting portion 240, it is preferably made of a non-conductive material so that the electrode connecting portion 240 is not conductive to each other.

In addition, the thickness of the base plate 200 is preferably smaller than the thickness of the light emitting diode 160 so as not to block the path of the light emitted from the light emitting diode 160 when the light emitting diode block and the other light emitting diode block is coupled. However, the present invention is not limited thereto, and the base plate 200 may have a thickness equal to or smaller than the thickness of the light emitting diode 160.

In addition, the base plate 200 is a base plate 200 of the connection member 220 when a reflecting member (not shown), that is, a reflecting plate is formed between the light emitting diodes 160 mounted on the substrate 100. ) Base plate 200 also serves as a reflecting plate using the same material as the side mold material using a reflective plate formed on the periphery of the light emitting diode, for example, a material such as PC-White.

As described above, the present invention can omit the connector by connecting a plurality of light emitting diode blocks with the connection member 220, thereby reducing the manufacturing cost.

Next, a backlight unit according to the present invention will be described with reference to the accompanying drawings. Descriptions overlapping with the foregoing description will be omitted or briefly described.

4 is a schematic exploded perspective view of a backlight unit according to the present invention, Figure 5 is a schematic cross-sectional view showing a state after assembly of the backlight unit according to the present invention.

As shown in FIG. 4, the backlight unit according to the present invention includes a light emitting diode assembly 320, an optical sheet 500 provided on the light emitting diode assembly 320, the light emitting diode assembly 320 and an optical sheet. A lower accommodating member 400 for accommodating 500 is included.

The light emitting diode assembly 320 is a combination of a plurality of light emitting diode blocks 300, each of the plurality of light emitting diode blocks 300 as shown in Figure 1, the light emitting diode 160 and the light emitting diode 160 ) And a connection part 150 formed on one side and the other side of the substrate 100. In addition, it includes a connection pad 310 for connecting the connection portion 150 formed in the plurality of light emitting diode blocks (300).

The connection part 150 is used to connect a plurality of light emitting diode blocks 300 to each other and to connect power to each other. The through hole 450 and the electrode part 140 may be formed at one side and the other side of the substrate 100. It can be formed as one set.

The connection pad 310 is for coupling a plurality of light emitting diode blocks 300 according to the present invention, and as shown in FIG. 2, the base plate 200 and a connection member formed on the base plate 200 ( 220 and an electrode connector 240.

According to the present invention having the structure as described above, the connection part 150 formed in the plurality of light emitting diode blocks 300 may be connected using the connection pad 310 having the connection member 220 and the electrode connection part 240 formed thereon.

In addition, the connection member 220 is provided with a step in the area connected to the base plate 200, the connection member 220 is inserted into the through-hole 120 of the substrate 100, the external foreign matter through the through-hole 120 ) Can be prevented from entering. At this time, the connecting member 220 is larger in diameter than the lower portion by the step, the diameter of the upper portion is preferably larger than the diameter of the through-hole 120 of the substrate 100, the diameter of the lower substrate It is preferable that the diameter of the through hole 120 is equal to or smaller than the diameter of the through hole 120.

In addition, the connection member 220 according to the present embodiment may be coupled to the lower housing member 400 as shown in FIG. That is, after the coupling hole 450 corresponding to the connection member 220 is formed in the lower accommodating member, the lower accommodating member is formed through the through hole 120 formed in the substrate 100. Can be coupled to the coupling hole 450 of (400). At this time, the diameter of the lower portion of the connecting member 220 is preferably the same or smaller than the diameter of the coupling hole 450. In addition, when the light emitting diode block 300 is coupled to and fixed to the lower housing member 400 using the connection member 220 as described above, it may be fixed as a reflector (not shown) formed between the light emitting diodes. . In this case, the base plate 200 of the connection member 220 is made of the same material as the side mold material formed at the periphery of the light emitting diode, for example, the base plate 200 using a material such as resin mixed with TiO ₂ . It is also desirable to serve as a reflector.

As described above, in the LED block 300 according to the present invention, wiring and connectors may be omitted, and thus the backlight unit may be electrically stabilized, and manufacturing cost may be reduced due to the reduction in the number of parts.

In addition, in the prior art, in the assembling process, the connectors mounted on one side and the other side of the light emitting diode block must be alternately coupled one by one, but the wiring should be arranged. However, the present invention provides a connection member in the through hole formed in the substrate of the light emitting diode block 300. Simply press to combine, reducing the assembly process and its time.

In addition, the present invention is designed so that the thickness of the connection pad 310 for connecting the plurality of light emitting diode blocks 300 does not block the light emitted from the light emitting diode 160 can prevent a defect such as a dark portion.

On the other hand, the optical sheet 500 is to improve the quality and the efficiency of the light emitted from the plurality of light emitting diode blocks 300, in this embodiment will include a diffusion sheet 510 and the prism sheet 520. Can be.

The diffusion sheet 510 is positioned on the upper surface of the plurality of light emitting diode blocks 300 to uniformly diffuse the light emitted from the plurality of light emitting diode blocks 300 to the front direction of the prism sheet 520 and the liquid crystal display panel. In order to reduce the spread of bright spots, bright lines, spots, and the like by transmitting the light, the viewing angle is preferably located between the plurality of light emitting diode blocks 300 and the prism sheet 520. The diffusion sheet 510 may be manufactured using polycarbonate (PC) resin or polyester (PET) resin.

The prism sheet 520 is for refracting and condensing the light emitted from the diffusion sheet 510 to increase the brightness to be incident on the liquid crystal display panel. To this end, the upper surface of the plurality of light emitting diode blocks 300, ie, It is preferably located between the light emitting diode block 300 and the liquid crystal display panel. As the prism sheet 520, a strip-shaped micro-prism is formed on a base material such as polyester, and two horizontal and vertical sheets may be used as one set.

The lower accommodating member 400 may be formed in a box shape of a rectangular parallelepiped in which an upper surface thereof is opened, and an accommodating space having a predetermined depth may be formed inside. The lower accommodating member 400 may include a bottom surface and sidewalls extending vertically from each edge from the bottom surface. In addition, a coupling hole 450 for fastening the connection member 220 of the connection pad 310 is formed on the bottom surface. The light emitting diode block 300 and the optical sheet 500 may be accommodated and fixed in the accommodation space of the lower housing member 400 as described above.

Next, a liquid crystal display using the backlight unit according to the present invention described above will be described with reference to the accompanying drawings. Descriptions overlapping with the foregoing description will be omitted or briefly described.

6 is a schematic exploded perspective view of a liquid crystal display according to the present invention.

Referring to FIG. 6, a liquid crystal display according to the present invention includes a liquid crystal display panel 2200, an LED assembly 320, an optical sheet 500 and an upper portion of the LED assembly 320. A backlight unit 1000 including a lower accommodating member 400 for accommodating the assembly 320 and the optical sheet 500, a mold frame 2000 for accommodating the backlight unit 1000, and a liquid crystal display panel. 2200 and an upper accommodating member 2400 for wrapping a predetermined region and a side portion of the upper portion of the backlight unit 1000.

The liquid crystal display panel 2200 may include a thin film transistor substrate 2220, a data side and gate side tape carrier package (TCP) 2260a and 2280a connected to the thin film transistor substrate 2220, a data side, Data side and gate side printed circuit boards 2260b and 2280b respectively connected to the gate side tape carrier packages 2260a and 2280a, the color filter substrate 2240 corresponding to the thin film transistor substrate 2220, and the thin film transistor substrate ( A liquid crystal layer (not shown) injected between the 2220 and the color filter substrate 2240. In addition, the display device may further include a polarizer (not shown) formed to correspond to the upper portion of the color filter substrate 2240 and the lower portion of the thin film transistor substrate 2220, respectively.

The color filter substrate 2240 is a substrate in which red (R), green (G), and blue (B) pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. A common electrode (not shown) made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO), which is a transparent conductive thin film, is formed on the front surface of the color filter substrate 2240. have.

The thin film transistor substrate 2220 is a transparent glass substrate in which thin film transistors (TFTs) and pixel electrodes are formed in a matrix form. The data line is connected to the source terminal of the thin film transistors, and the gate line is connected to the gate terminal. In addition, a pixel electrode (not shown) made of a transparent electrode made of a transparent conductive material is connected to the drain terminal. When an electrical signal is input to the data line and the gate line, each thin film transistor is turned on or turned off to apply an electrical signal necessary for pixel formation to a drain terminal.

The backlight unit 1000 may include a light emitting diode assembly 320 generating light and an upper portion of the light emitting diode assembly 320 to improve the quality of light emitted from the light emitting diode assembly 320 and to improve efficiency. An optical sheet 500 and a lower accommodating member 400 for accommodating the light emitting diode assembly 320 and the optical sheet 500 are included. In this case, a driving unit (not shown) for driving the light emitting diode assembly 320 may be included.

The light emitting diode assembly 320 is a combination of a plurality of light emitting diode blocks 300, each of the plurality of light emitting diode blocks 300 as shown in Figure 1, the light emitting diode 160 and the light emitting diode 160 ) And a connection part 150 formed on one side and the other side of the substrate 100. In addition, it includes a connection pad 310 for connecting the connection portion 150 formed in the plurality of light emitting diode blocks (300).

The connection part 150 is for connecting a plurality of light emitting diode blocks 300 to each other and connecting power, and connecting the through hole 120 and the electrode part 140 to one side and the other side of the substrate 100. It can be formed as one set.

The connection pad 310 is for coupling the plurality of light emitting diode blocks 300 according to the present invention, and as shown in FIG. 2, the base plate 200 and the connection member formed on the base plate 200 ( 220 and an electrode connector 240.

According to the present invention having the structure as described above, the connection parts 150 formed on the plurality of light emitting diode blocks 300 may be connected using the connection pads 310 in which the connection member 220 and the electrode connection part 240 are formed.

As described above, in the LED block 300 according to the present invention, the wiring unit and the connector may be omitted so that the backlight unit may be electrically stabilized, and manufacturing cost may be reduced due to the reduction of the number of parts.

In addition, in the prior art, in the assembling process, the connectors mounted on one side and the other side of the light emitting diode block must be alternately coupled one by one, but the wiring should be arranged. Simply press to combine, reducing the assembly process and its time.

In addition, the present invention is designed so that the thickness of the connection pad 310 for connecting the plurality of light emitting diode blocks 300 does not block the light emitted from the light emitting diode 160 can prevent a defect such as a dark portion.

The mold frame 2000 is formed in a rectangular frame shape and includes a planar portion and sidewall portions bent at right angles therefrom. A mounting portion (not shown) may be formed on the flat portion to allow the liquid crystal display panel 2200 to be mounted thereon. The seating part may use a fixing protrusion for contacting and aligning the edge side surfaces of the liquid crystal display panel 2200, respectively, or may be formed using a predetermined stepped step surface. In the mold frame 2000, the optical sheet 500 and the plurality of light emitting diode blocks 300 with the lower housing member 400 are fixed.

The upper accommodating member 2400 is configured in the form of a rectangular window frame having a flat portion and sidewall portions bent at right angles therefrom. The planar portion of the upper accommodating member 2400 may support a portion of the edge of the liquid crystal display panel 2200 at a lower portion thereof, and the sidewall portion may be coupled to face the sidewalls of the lower accommodating member 400. The upper accommodating member 2400 and the lower accommodating member 400 are preferably manufactured using metal having excellent strength, light weight, and low deformation.

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

As described above, in the present invention, the LED block may be electrically stabilized since wiring and connectors are omitted, and the LED assembly and the backlight unit and the liquid crystal using the same may reduce manufacturing cost due to the reduction of the number of parts. A display device can be provided.

In addition, the present invention can provide a light emitting diode assembly, a backlight unit and a liquid crystal display device using the same because the assembly process and time is reduced by simply coupling the connecting member to the through-hole formed in the substrate.

In addition, the present invention is designed so that the thickness of the connection pad for connecting a plurality of light emitting diode blocks does not block the light emitted from the light emitting diode to prevent a defect such as a dark portion, the backlight unit and the liquid crystal using the same A display device can be provided.

Claims (12)

A light emitting diode block including a substrate, a light emitting diode mounted on the substrate, and a connection portion formed on at least one side of the substrate; The light emitting diode block assembly comprising a connection pad for connecting between adjacent connection when the plurality of light emitting diode blocks are connected. The method according to claim 1, The connection pad, With base plate, A connection member protruding from one surface of the base plate; Light emitting diode block assembly comprising an electrode connection portion mounted to one surface of the base plate. The method according to claim 2, The connecting member is a light emitting diode block assembly, characterized in that it comprises a hook. The method according to claim 3, The connecting member has a stepped shape in which an upper region close to the base plate is larger in diameter than the lower region, The diameter of the upper region is larger than the diameter of the through-hole LED block assembly. The method according to claim 2 or 3, The connection part includes a through hole, The light emitting diode block assembly is coupled to the adjacent light emitting diode block by the coupling of the connecting member and the through-hole. The method according to claim 2 or 3, The connection part includes an electrode part electrically connected to the light emitting diode, The electrode block of the light emitting diode block adjacent to each other by the electrode connecting portion, characterized in that the light emitting diode block assembly. The method according to claim 6, The electrode connection portion of the light emitting diode block assembly, characterized in that it comprises a leaf spring. The method according to claim 1, Further comprising a reflective member formed between the light emitting diodes on the substrate and is an insulator, The reflective member is a light emitting diode block assembly, characterized in that fixed by the connection pad. The method according to claim 8, The base plate is a light emitting diode block assembly, characterized in that formed of the same material as the reflective member. A light emitting diode block including a substrate, a light emitting diode mounted on the substrate, and a connection portion formed on at least one side of the substrate; And a light emitting diode block assembly having a connection pad for connecting between adjacent connection parts when connecting the plurality of light emitting diode blocks. The method according to claim 10, Further comprising a receiving member for receiving the light emitting diode block assembly, the coupling hole is formed, The connection member of the connection pad is coupled to the coupling hole through the through-hole of the light emitting diode block. A light emitting diode block including a substrate, a light emitting diode mounted on the substrate, a connection portion formed on at least one side of the substrate, and a connection pad for connecting a plurality of light emitting diode blocks between adjacent connection portions; A backlight unit comprising a diode block assembly, And a liquid crystal display panel for receiving light from the backlight unit to display an image.

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