KR20060063307A - A back light assembly - Google Patents

Abstract

The present invention relates to a backlight assembly that can solve the difficulty of assembly by using a lead wire made of an elastic material having a variable length, and can prevent damage to a lamp, and includes at least one light source that emits light and transmits the light to a liquid crystal panel. ; An outer case accommodating the light source therein; A side supporter having a through hole surrounding an outer circumferential surface of the light source and supporting the light source through the through hole and coupled to both sides of the outer case; A printed circuit board coupled to one side of the side supporter so as to face an end of the light source exposed through the through hole; And a lead wire electrically connecting the electrode of the light source to the printed circuit board and having elasticity.

LCD, Backlight Assembly, Fluorescent Lamp, Lead Wire, Side Supporter

Description

Back light assembly {A back light assembly}

1 is a perspective view of a conventional backlight assembly

2 is a configuration diagram of a lamp array having first and second printed circuit boards connected at both ends thereof;

3A is a diagram for explaining a problem caused when the length of each lead wire is longer than an appropriate length.

3B is a view for explaining a problem caused when the length of each lead wire is shorter than the proper length.

4 is a perspective view of a backlight assembly according to an embodiment of the present invention;

5A and 5B illustrate another shape of the first and second lead wires of FIG. 4.

6 is a detailed configuration diagram of the lamp of FIG.

7A to 7C are views for explaining a method of assembling a backlight assembly according to an embodiment of the present invention when the length of the first and second lead wires is longer than an appropriate length.

8A and 8B are views for explaining a method of assembling a backlight assembly according to an embodiment of the present invention when the length of the first and second lead wires is shorter than an appropriate length.

* Explanation of symbols on the main parts of the drawings

400: lamp 410: outer case

420a: first side supporter 420b: second side supporter                 

430a: first printed circuit board 430b: second printed circuit board

455a: first electrode 455b: second electrode

477a: first bolt 477b: second bolt

408: through hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight assembly of a liquid crystal display device. The present invention relates to a backlight assembly capable of solving assembly difficulties and preventing damage to a lamp by using a lead wire made of an elastic material having a variable length.

In recent years, research on flat panel display devices has been actively conducted. Among them, liquid crystal display devices (LCDs), field emission display devices (FEDs), electro-luminescence display devices (ELDs), and PDPs (PDPs) Plasma Display Pannels).

Among them, LCD is the most widely used as a substitute for CRT (Cathode Ray Tube) for the use of mobile image display device because of the excellent image quality, light weight, thinness, and low power consumption, and mobile type such as monitor of notebook computer. In addition, it is being developed in various ways such as a monitor of a television and a computer for receiving and displaying broadcast signals.

As described above, although various technical advances have been made in order for the liquid crystal display device to serve as a screen display device in various fields, the task of improving the image quality as the screen display device has many advantages and disadvantages.

Therefore, in order to use a liquid crystal display device in various parts as a general screen display device, the key to development is how much high definition images such as high definition, high brightness, and large area can be realized while maintaining the characteristics of light weight, thinness, and low power consumption. It can be said.

Such a liquid crystal display device may be broadly divided into a liquid crystal panel displaying an image and a driving unit for applying a driving signal to the liquid crystal panel, wherein the liquid crystal panel includes a first and second substrates having spaces, and It consists of a liquid crystal layer injected between a 1st board | substrate and a 2nd board | substrate.

On the other hand, such a liquid crystal display device itself is non-luminescent, so a separate external light source for irradiating light is required.

In particular, in the case of a transmissive liquid crystal display, a separate dimming device that emits light and guides the back of the liquid crystal panel is required.

The back light includes an edge type and a direct type.

In the direct type, a light emitting lamp is disposed on a flat surface. Since the shape of the light emitting lamp appears on the liquid crystal panel, the gap between the light emitting lamp and the liquid crystal panel should be maintained, and light scattering means should be disposed for the uniform distribution of light quantity. Therefore, there is a limit to thinning.

In addition, as the liquid crystal panel becomes larger, the area of the light exit surface of the backlight is also increased. When the direct backlight is enlarged, the light exit surface is not flat unless the light scattering means secures a sufficient thickness. Therefore, the thickness of the light scattering means must be sufficiently secured.

On the other hand, the edge type is to install a light emitting lamp on the outside and to distribute the light to the entire surface using a light guide plate, the light emitting lamp is installed on the side, there is a problem that the brightness is low because the light must pass through the light guide plate. In addition, high optical design and processing techniques for the light guide plate are required for uniform distribution of luminance.

Since the direct type and edge type have their disadvantages, the direct type backlight is mainly used in the liquid crystal display device where brightness is more important than the screen thickness, and the thickness such as a notebook PC or a monitor PC is important. In the liquid crystal display device, an edge type backlight is mainly used.

The backlight configured as described above uses a fluorescent lamp (hot cathode, cold cathode) as a light source. The fluorescent lamp generates less heat than a heat radiation type lighting device such as an incandescent lamp and can be manufactured without any length limitation in the form of a line. It has a long service life and various advantages to withstand frequent flashing.

Hereinafter, a conventional backlight assembly will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a conventional backlight assembly.

In the conventional backlight assembly, as shown in FIG. 1, a plurality of lamps 100 are arranged in one direction at a predetermined interval inside the outer case 110, and one side edge of the outer case 110 is provided. The first side supporter 120a for fixing one ends of the lamps 100 is coupled thereto, and fixing the other ends of the lamps 100 to the other edge of the outer case 110. The second side supporter 120b is coupled thereto.

The first and second side supporters 120a and 120b have a bar shape, and a U-shaped through hole 108 penetrating through the first and second side supporters 120a and 120b is formed. The through holes 108 are formed in plural at the same interval as the interval of the lamps 100, one end of each of the lamps 100 in each of the through holes 108 of the first side supporter (120a) The other end of each lamp 100 is inserted into each through hole 108 of the second side supporter 120b. In this way, each side supporter (120a, 120b) is coupled to the outer case 110, it is supported by restraining both ends of the lamp 100 through the through hole 108.

Although not shown in the drawing, one end of the lamp 100 is fitted with a first lamp holder made of a rubber material surrounding the outer circumferential surface of the one end, and an outer circumferential surface of the other end is attached to the other end of the lamp 100. A second lamp holder of surrounding rubber material is formed. The first lamp holder is formed to be in close contact with the inner wall of the through hole 108 formed in the first side supporter 120a so that an impact applied to the first side supporter 120a is transmitted to one end of the lamp 100. It prevents it from becoming. In addition, the second lamp holder prevents the shock applied to the second side supporter 120b from being transmitted to the other end of the lamp 100.                         

A first lead wire 155a is connected to one end of the lamp 100, and a second lead wire 155b is connected to the other end of the lamp 100. The first lead wire 155a is electrically connected to the first printed circuit board 130a, and the second lead wire 155b is electrically connected to the second printed circuit board 130b. The first lead wire 155a transmits a voltage transmitted through an inverter (not shown) mounted on the first printed circuit board 130a to a first electrode (not shown) formed inside the lamp 100. The second lead wire 155b transmits a voltage transmitted through an inverter (not shown) mounted on the second printed circuit board 130b to form a second electrode formed inside the lamp 100. It serves to communicate (not shown).

Meanwhile, the side supporters 120a and 120b, the printed circuit boards 130a and 130b, and the outer case 110 are coupled to each other using a plurality of bolts 177a and 177b.

That is, the first bolt 177a is inserted into each of the side supporters 120a and 120b by penetrating the outer case 110, thereby fastening the outer case 110 and the side supporters 120a and 120b. do. The second bolt 177b penetrates through each of the printed circuit boards 130a and 130b and is inserted into each of the side supporters 120a and 120b, thereby providing the respective printed circuit boards 130a and 130b and the respective side supporters ( Fasten between 120a and 120b).

Referring to the assembly process of the conventional backlight assembly configured as described above in detail as follows.

2 is a configuration diagram of a lamp array in which first and second printed circuit boards are connected at both ends.                         

First, the lamps 100 are arranged at regular intervals, the first printed circuit board 130a is positioned on the left side of the lamps 100, and the second printed circuit board () is located on the right side of the lamps 100. 130b). Here, holes are formed in the printed circuit boards 130a and 130a at predetermined intervals so that the lead wires 155a and 155b of the lamps 100 can pass therethrough.

Subsequently, the first printed circuit board 130a is advanced toward the lamps 100 so that the first lead wires 155a of the lamps 100 pass through the holes.

Next, a portion of the first lead wire 155a that passes through the hole and emerges from the opposite side of the first printed circuit board 130a is cut to an appropriate length. The cut first lead wire 155a is soldered to electrically connect the first lead wire 155a and the first printed circuit board 130a to each other.

Subsequently, a lamp holder is fitted to one end of each of the lamps 100. Slit is formed in the lamp holder to expose the first lead wire 155a to the outside.

In the manner as described above, the second lead wire 155b and the second printed circuit board 130b are electrically connected to each other.

Then, as shown in FIG. 2, a lamp array 220 is formed in which the lamp 100 and the first and second printed circuit boards 130a and 130b are integrally formed.

Subsequently, as illustrated in FIG. 2, the lamp array 220 is accommodated in the outer case 110. In this case, the lamps 100 are supported by the respective lamp holders, and are spaced apart from the inner bottom surface of the outer case 110 by a predetermined interval.                         

Next, the first side supporter 120a is coupled to one side edge of the outer case 110 to fix one ends of the lamps 100, and the second side supporter 120b is fixed to the outer case 110. The other ends of the lamps 100 are fixed to the other ends of the lamps 100.

Subsequently, the outer case 110 and the respective side supporters 120a and 120b are fastened to each other using a first bolt 177a, and the respective side supporters 120a and 120b are connected to each other using a second bolt 177b. And each of the printed circuit boards 130a and 130b are fastened to each other.

In this case, when the outer case 110, the side supporters 120a and 120b, and the printed circuit boards 130a and 130b are coupled to each other, the lengths of the lead wires 155a and 155b are longer than appropriate lengths. Or, if it is shorter than the proper length, the following problems may occur. That is, the length difference between the lead wires 155a and 155b may occur during cutting and soldering of the lead wires 155a and 155b. In particular, since the process is performed by hand, the frequency of occurrence of the lead wires 155a and 155b is greater.

FIG. 3A is a diagram illustrating a problem that occurs when the length of each lead wire is longer than an appropriate length, and FIG. 3B is a diagram illustrating a problem that occurs when the length of each lead wire is shorter than the proper length.

As shown in FIG. 3A, when the first lead wire 155a and the second lead wire 155b are longer than an appropriate length, the first printed circuit board 130a may be connected to the first side supporter 120a. Since it may not be in close contact with each other, a gap d may be generated between the first printed circuit board 130a and the first side supporter 120a. In this manner, the clearance d is generated between the second printed circuit board 130b and the second side supporter 120b.

Thereafter, as the second bolt 177b is fastened, the first printed circuit board 130a is in close contact with the first side supporter 120a while traveling toward the first side supporter 120a. 2 The printed circuit board 130b is in close contact with the second side supporter 120b while traveling toward the second side supporter 120b.

At this time, the first lead wire 155a connected to the first printed circuit board 130a exerts pressure on one end of the lamp 100 in the first direction shown in FIG. 3A. In addition, the second lead wire 155b connected to the second printed circuit board 130b applies pressure to the other end of the lamp 100 in the second direction shown in FIG. 3A. Then, the lamp 100 may be bent by the force applied to both ends thereof, or may be broken in severe cases.

In addition, as shown in FIG. 3B, when the first and second lead wires 155a and 155b are shorter than the appropriate lengths, the first and second printed circuit boards 130a and 130b may have the first and second leads. The second side supporters 120a and 120b are invaded into the outer case 110 to be installed, so that the first and second side supporters 120a and 120b are not coupled to the outer case 110. .

In addition, when an external rotor shock is applied, it is applied to the lamp 100 through the lead wires 155a and 155b, and the lamp 100 may be damaged.

The present invention has been made to solve the above problems, by using an elastic lead wire that can be changed to an appropriate length, to solve the difficulty of assembly, to provide a backlight assembly that can prevent the lamp breakage The purpose is.

Lamp of the backlight assembly according to the present invention for achieving the above object, at least one light source for emitting the light to the liquid crystal panel; An outer case accommodating the light source therein; A side supporter having a through hole surrounding an outer circumferential surface of the light source and supporting the light source through the through hole and coupled to both sides of the outer case; A printed circuit board coupled to one side of the side supporter so as to face an end of the light source exposed through the through hole; And a lead wire electrically connecting the electrode of the light source to the printed circuit board and having elasticity.

Hereinafter, a lamp of a backlight assembly according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view of a backlight assembly according to an exemplary embodiment of the present invention, and FIGS. 5A and 5B are views illustrating still another shape of the first and second lead wires of FIG. 4.

In the backlight assembly according to the exemplary embodiment of the present invention, as shown in FIG. 4, a plurality of lamps 400 are arranged in one direction at a predetermined interval in the outer case 410, and the outer case 410 is provided. The first side supporter 420a for fixing one ends of the lamps 400 is coupled to one edge of the lamp 400, and the other edge of the lamps 400 is provided at the other edge of the outer case 410. The second side supporter 420b for securing the ends is coupled.

The first and second side supporters 420a and 420b have a bar shape, and a U-shaped through hole 408 penetrating through the first and second side supporters 420a and 420b is formed. The through holes 408 are formed in plural at the same intervals as those of the lamps 400, and one end of each of the lamps 400 is formed in each through hole 408 of the first side supporter 420a. The other end of each lamp 400 is inserted into each through hole 408 of the second side supporter 420b. As described above, each of the side supporters 420a and 420b is coupled to the outer case 410 and is supported while restraining both ends of the lamp 400 through the through hole 408.

Although not shown in the drawing, one end of the lamp 400 is fitted with a first lamp holder made of a rubber material surrounding the outer circumferential surface of the one end, and an outer circumferential surface of the other end is attached to the other end of the lamp 400. A second lamp holder of surrounding rubber material is formed. The first lamp holder is formed to be in close contact with the inner wall of the through hole 408 formed in the first side supporter 420a so that an impact applied to the first side supporter 420a is transmitted to one end of the lamp 400. It prevents it from becoming. The second lamp holder prevents the shock applied to the second side supporter 420b from being transmitted to the other end of the lamp 400.

A first lead wire 455a is connected to one end of the lamp 400, and a second lead wire 455b is connected to the other end of the lamp 400. The first lead wire 455a is electrically connected to the first printed circuit board 430a, and the second lead wire 455b is electrically connected to the second printed circuit board 430b. The first and second lead wires 455a and 455b are made of a material having elasticity, and have a spring-like shape to double the elastic force. The first lead wire 455a transmits a voltage transmitted through an inverter (not shown) mounted on the first printed circuit board 430a to a first electrode (not shown) formed inside the lamp 400. The second lead wire 455b is configured to transfer a voltage transmitted through an inverter (not shown) mounted on the second printed circuit board 430b to the inside of the lamp 400. It serves to communicate (not shown).

The first and the first lead wires 455a and 455b are made of materials having elasticity, that is, spring steel, hard steel wire, piano wire, oil temper wire, stainless steel wire, brass wire, nickel white wire, phosphor bronze copper, or beryllium copper wire. Can be formed.

In addition, since the first and second lead wires 455a and 455b are made of the same material and shape as described above, the first and second lead wires 455a and 455b also serve to cushion shocks applied from the outside.

That is, the first lead wire 455a serves to buffer the external shock applied to the first printed circuit board 430a from being transmitted to one end of the lamp 400, and the second lead wire 455b is It serves to buffer the shock applied to the second printed circuit board 430b from being transmitted to the other end of the lamp 400.

In addition, as illustrated in FIGS. 5A and 5B, the above-described buffering effect may be exhibited even when the first and second lead wires 455a and 455b are formed in a zigzag shape, an S shape, or the like.                     

Although not shown in the drawings, a reflection plate (not shown) is further provided on the inner bottom surface of the outer case to reflect the light emitted from the lamp 400 to the display unit side of the liquid crystal panel. The upper surface of the side supporter (420a, 420b) is a diffuser plate for receiving the light emitted from the lamp 400 and uniformly diffused, and formed on the diffusion plate, the light diffused uniformly from the diffuser plate Optical sheets such as a polarizing film for receiving the light and increasing the brightness of the light to provide to the display unit of the liquid crystal panel are further provided, and the upper portion of the optical sheets prevents the flow of the optical sheets and at the same time the liquid crystal A side panel for accommodating the panel is further provided. Here, the side panel is provided between the optical sheet and the liquid crystal panel to surround the upper edge of the optical sheet and the lower edge of the liquid crystal panel. In addition, the backlight assembly according to the embodiment of the present invention further includes a top case surrounding the upper edge of the liquid crystal panel and the side of the side panel. The top case serves to fix the liquid crystal panel and the side panels 420a and 420b.

On the other hand, the lamp 400 may use a fluorescent lamp containing a fluorescent material therein, which will be described in more detail as follows.

6 is a detailed block diagram illustrating the lamp of FIG. 4.

Referring to the lamp 400, as shown in FIG. 6, the first electrode 666a and the second electrode 666b are formed in the rod-shaped glass tube 600. The first electrode 666a is formed at one end of the glass tube 600, and the second electrode 666b is formed at the other end of the glass tube 600. In addition, a first bead glass 611a for sealing the inside of the glass tube 600 is formed at one end of the glass tube 600, and at the other end of the glass tube 600. A second bead glass 611b is formed in which the glass tube 600 is hermetically sealed.

In addition, a first sealing line 601a passing through the first bead glass 611a and a second sealing line 601b passing through the second bead glass 611b are formed in the glass tube 600. It is. One side of the first sealing line 601a is located inside the glass tube 600 and is connected to the first electrode 666a, and the other side of the first sealing line 601a is outside the glass tube 600. Is exposed to be connected to the first lead wire 455a. In addition, one side of the second sealing line 601b is located inside the glass tube 600 and is connected to the second electrode 666b, and the other side of the second sealing line 601b is the glass tube 600. It is exposed to the outside of the second lead wire 455b.

Meanwhile, the electrodes 666a and 666b receive a voltage from the outside through the lead wires 455a and 455b. The lead wires 455a and 455b are provided outside the glass tube 600. Since the electrodes 666a and 666b are formed inside the glass tube 600, the sealing lines 601a and 601b penetrate the glass tube 600 to connect the lead wires to the electrodes 666a and 666b. Connect to each other. At this time, since the fluorescent material inside the glass tube 600 may leak to the outside at the interface between the glass tube 600 and the sealing line, the bead glass (611a, 611b) at both ends of the glass tube 600 It is fused to prevent leakage of the fluorescent material.                     

The side supporters 420a and 420b, the printed circuit boards 430a and 430b, and the outer case 410 are coupled to each other by a plurality of bolts 477a and 477b.

That is, the first bolt 477a penetrates through the outer case 410 and is inserted into each of the side supporters 420a and 420b, thereby fastening the outer case 410 and each of the side supporters 420a and 420b. do. The second bolt 477b penetrates through each of the printed circuit boards 430a and 430b and is inserted into each of the side supporters 420a and 420b, whereby each of the printed circuit boards 430a and 430b and each side supporter ( Fasten between 420a and 420b).

Here, a method for solving the problem that occurs when the length of the first and second lead wires 455a and 455b is longer than an appropriate length, and the length of the first and second lead wires 455a and 455b is larger than an appropriate length. A method for solving the problem that occurs when the shorter is described in detail through the process of assembling the backlight assembly of the present invention as follows.

7A to 7C are views for explaining a method of assembling a backlight assembly according to an embodiment of the present invention when the lengths of the first and second lead wires are longer than an appropriate length.

First, the lamps 400 are arranged at regular intervals, the first printed circuit board 430a is positioned on the left side of the lamps 400, and the second printed circuit board 430b is disposed on the right side of the lamps 400. ). Here, holes are formed in the printed circuit boards 430a and 430b at predetermined intervals so that the lead wires 455a and 455b of the lamps 400 can pass therethrough.

Subsequently, the first printed circuit board 430a is advanced toward the lamp 400 so that the first lead wires 455a of the lamps 400 pass through the holes.                     

Next, the portion of the first lead wire 455a that passes through the hole and emerges from the opposite side of the first printed circuit board 430a is cut to an appropriate length. The cut first lead wire 455a is soldered to electrically connect the first lead wire 455a and the first printed circuit board 430a to each other.

Subsequently, a first lamp holder is fitted to one end of each of the lamps 400. A slit is formed in the first lamp holder to expose the first lead wire 455a to the outside.

Next, in the manner as described above, the second lead wire 455b and the second printed circuit board 430b are electrically connected to each other. Then, a lamp array in which a plurality of lamps 400 are connected to the first and second printed circuit boards 430a and 430b is formed.

Subsequently, as illustrated in FIG. 7A, the lamp array is accommodated in the outer case 410. In this case, the lamps 400 are supported by the lamp holder and spaced apart from the inner bottom surface of the outer case 410 by a predetermined interval.

Next, as illustrated in FIG. 7B, the first side supporter 420a is coupled to one edge of the outer case 410 to fix one ends of the lamps 400, and the second side supporter ( 420b is coupled to the other edge of the outer case 410 to fix the other ends of the lamps 400.

In this case, as shown in FIG. 7B, when the lengths of the first and second lead wires 455a and 455b are longer than appropriate lengths, the first printed circuit board 430a may be formed in the first side supporter. Since the contact surface 420a is not in close contact with each other, a gap d is generated between the first printed circuit board 430a and the first side supporter 420a. In this way, a gap d is generated between the second printed circuit board 430b and the second side supporter 420b.

Subsequently, as illustrated in FIG. 7C, the outer case 410 and the respective side supporters 420a and 420b are fastened to each other by using a first bolt 477a, and the second bolt 477b is used to fasten each other. The side supporters 420a and 420b and the printed circuit boards 430a and 430b are fastened to each other.

Here, as the second bolt 477b is fastened, the first printed circuit board 430a is in close contact with the first side supporter 420a while traveling toward the first side supporter 420a. 2 The printed circuit board 430b is in close contact with the second side supporter 420b while traveling toward the second side supporter 420b.

In this case, the shape of the first lead wire 455a connected to the first printed circuit board 430a is deformed by the pressure (the pressure in the first direction) pressed by the first printed circuit board 430a. That is, since the first lead wire 455a is elastic and has a spring shape, it is contracted. Therefore, the first printed circuit board 430a may be fastened to the first side supporter 420a more easily than before. In addition, since the pressure applied by the first printed circuit board 430a is buffered due to the elastic force of the first lead wire 455a, the pressure transmitted to one end of the lamp 400 is minimized.

Similarly, the shape of the second lead wire 455b connected to the second printed circuit board 430b is deformed by the pressure (pressure in the second direction) pressed by the second printed circuit board 430b. That is, since the second lead wire 455b is elastic and has a spring shape, it is contracted. Therefore, the second printed circuit board 430b may be fastened to the second side supporter 420b more easily than before. In addition, due to the elastic force of the second lead wire 455b, since the pressure applied by the second printed circuit board 430b is buffered, the pressure transmitted to the other end of the lamp 400 may be minimized.

8A and 8B illustrate a method of assembling a backlight assembly according to an exemplary embodiment of the present invention when the length of the first and second lead wires is shorter than an appropriate length.

First, as described above, the lamp array is connected by connecting the first and second printed circuit boards 430a and 430b to both ends of the lamp 400.

Subsequently, as illustrated in FIG. 8A, the lamp array is accommodated in the outer case 410. Here, since the lengths of the first and second lead wires 455a and 455b are shorter than the proper lengths, the first and second printed circuit boards 430a and 430b are formed in the first and second side supporters. The first and second side supporters 420a and 420b are not coupled to the outer case 410 because the first and second side supporters 420b are invaded into the inner case 410 to be installed.

In this case, as shown in FIG. 8A, when the first printed circuit board 430a is pulled in an outer direction (third direction) of the outer case 410 so as to move away from one end of the lamp 400. The first lead wire 455a connected to one end of the first printed circuit board 430a and the lamp 400 is expanded by its elastic force, and thus the length of the first lead wire 455a is increased. do. Therefore, the first printed circuit board 430a can be easily pulled out of the outer case 410.

Similarly, when the second printed circuit board 430b is pulled in the outward direction (fourth direction) of the outer case 410 so as to move away from the other end of the lamp 400, the second printed circuit board 430b and the second lead wire 455b connected to the other end of the lamp 400 are expanded by their elastic force, thereby lengthening the length of the second lead wire 455b. Therefore, the second printed circuit board 430b can be easily pulled out of the outer case 410.

Subsequently, as shown in FIG. 8B, the first and second sides of the first and second printed circuit boards 430a and 430b are pulled to both sides so as to be located outside the outer case 410. The supporters 420a and 420b are coupled to the edges of the outer case 410. The first and second side supporters 420a and 420b and the outer case 410 are fastened to each other using a first bolt 477a.

On the other hand, when the force to pull the first and second printed circuit boards (430a, 430b) on both sides is removed, the first and second lead wires (455a, 455b) is contracted again by a restoring force, wherein, The first printed circuit board 430a connected to the first lead wire 455a comes into contact with the first side supporter 420a, and the second printed circuit board 430b connected to the second lead wire 455b comes from the first printed circuit board 430a. In contact with the two side supporter 420b. In this state, the first printed circuit board 430a and the first side supporter 420a are fastened to each other by using a second bolt 477b, and the second printed circuit board 430b and the first printed circuit board 430a are fastened to each other. The two side supporters 420b are fastened to each other using the second bolt 477b.

Therefore, the first printed circuit board 430a may be fastened to the first side supporter 420a more easily than before. In addition, since the pressure applied by the second printed circuit board 430b is buffered due to the elastic force of the second lead wire 455b, the pressure transmitted to the other end of the lamp 400 is minimized.

Similarly, the second printed circuit board 430b may be more easily fastened to the second side supporter 420b than before. In addition, since the pressure applied by the second printed circuit board 430b is buffered due to the elastic force of the second lead wire 455b, the pressure transmitted to the other end of the lamp 400 is minimized.

On the other hand, in order for each of the lead wires 455a and 455b to act as a cushioning material, the lead wires 455a and 455b should be designed to be lower than their maximum stress. The maximum stress depends on the material of the lead wires 455a and 455b.

In addition, the restoring force of each of the lead wires 455a and 455b varies in size depending on the shape of each of the lead wires 455a and 455b. For example, when each of the lead wires 455a and 455b has a spring shape, the restoring force of each of the lead wires 455a and 455b depends on the number of rotations of the lead wires 455a and 455b. That is, each of the lead wires 455a and 455b has a higher restoring force as the number of revolutions increases. When the lead wires 455a and 455b have a zigzag or S-shape, the lead wires 455a and 455b vary depending on the number of curved portions of the lead wires 455a and 455b. That is, each of the lead wires 455a and 455b has a higher restoring force as the curved portion increases.                     

On the other hand, as the restoring force increases, the buffering effect of each lead wire increases, but as the restoring force increases, the pressure applied to the end of the lamp also increases. It is desirable to adjust.

 The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The backlight assembly according to the present invention as described above has the following effects.

The lead wire provided in the backlight assembly according to the present invention is made of an elastic material and has a spring shape. That is, the length of the lead wire is easily variable, and also acts as a shock absorber against external impact. Therefore, the backlight assembly of the present invention can solve the difficulty of assembly caused by the difference in the length of the lead wire, and can prevent the damage of the lamp by alleviating the external impact.

Claims (5)

At least one light source that emits light and transmits the light to the liquid crystal panel; An outer case accommodating the light source therein; A side supporter having a through hole surrounding an outer circumferential surface of the light source and supporting the light source through the through hole and coupled to both sides of the outer case; A printed circuit board coupled to one side of the side supporter so as to face an end of the light source exposed through the through hole; And, And a lead wire electrically connecting the electrode of the light source to the printed circuit board and having elasticity. The method of claim 1, The lead wire is a backlight assembly, characterized in that formed of any one of a spring shape, zigzag shape, and S-shape. The method of claim 1, The lead wire is any one of a spring steel, hard steel wire, piano wire, oil temper wire, stainless steel wire, brass wire, Yangbaek wire, phosphor bronze copper wire, beryllium copper wire. The method of claim 1, And the light source is a fluorescent lamp. The method of claim 4, wherein The fluorescent lamp, the glass tube containing a fluorescent material therein; An electrode formed inside the glass tube; A bead glass formed in the glass tube to seal the inside of the glass tube; And, And a sealing line penetrating through the bead glass and having one side connected to the electrode and the other side connected to the lead wire.

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