KR20070076690A - Backlight assembly and assembling method thereof - Google Patents

Abstract

A backlight assembly and an assembly method thereof are provided to closely fix a light source module to a bottom chassis and improve productivity by forming a coupling hole in the light source module, and a protrusion corresponding to the coupling hole on the bottom chassis, and coupling the coupling hole with the protrusion. A light source supplies light. A light source module(100) includes the light source, and includes at least one coupling hole(130). A bottom chassis(200) includes a protrusion(210) inserted in the coupling hole corresponding to the coupling hole. The bottom chassis and the light source module are closely fixed with each other by the coupling between the protrusion and the coupling hole. The light source is a light emission diode. The protrusion protrudes upwardly of the bottom chassis.

Description

Backlight assembly and assembly method thereof {BACKLIGHT ASSEMBLY AND ASSEMBLING METHOD THEREOF}

1 is a view for explaining the assembly method of a conventional backlight assembly.

2 is an assembled perspective view of a backlight assembly according to a first embodiment of the present invention.

2A to 2D are cross-sectional views sequentially illustrating a method of assembling a backlight assembly according to a first embodiment of the present invention.

3 is an assembled perspective view of a backlight assembly according to a second embodiment of the present invention.

3A to 3D are views illustrating a method of assembling a backlight assembly according to a second embodiment of the present invention.

4A and 4B illustrate modified protrusions according to a third exemplary embodiment of the present invention.

5 is an assembled perspective view of a backlight assembly according to a fourth embodiment of the present invention.

5A to 5C are views illustrating an assembly process of a backlight assembly according to a fourth embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: light source module 110: printed circuit board

120: light emitting diode 130: coupling hole

200: bottom chassis 210, 220, 230: protrusion

210 ', 220', 220 '', 230 ': deformed protrusions

The present invention relates to a backlight assembly, and more particularly, to a backlight assembly for fixing a printed circuit board to a bottom chassis and a method of assembly thereof.

Recently, a liquid crystal display (LCD), which is widely used as a flat panel display device, is a passive optical device that does not emit light by itself, and thus displays an image by attaching a backlight unit as a light source to a rear surface of the liquid crystal panel. Therefore, the characteristics of the entire liquid crystal display device are affected by the structure of the backlight unit.

Such a backlight unit has an edge type that requires a light guide plate to change the linear light of the lamp to surface light according to the position of the light source relative to the display surface, and directly below the display surface where the lamp is not needed because the lamp is positioned below the display surface. It is divided into forms.

In the backlight assembly using a light emitting diode (LED) instead of a lamp as a light source, a plurality of red, green, and blue LEDs 12 are mounted on a printed circuit board 11, as shown in FIG. The light source modules 10-1 to 10-n, the bottom chassis 20 for fixing the plurality of light source modules 10-1 to 10-n, and an optical sheet such as a diffuser plate or a prism sheet, not shown. And LED driving circuit. At this time, in order to maintain the efficiency of the LED to transfer the heat generated from the LED 12 to the bottom chassis 20 to cool the light source modules (10-1 to 10-n) to the bottom chassis (20) 13) to make close contact. That is, the light source modules 10-1 to 10-n are fixed to the bottom chassis 20 by screwing through a screw hole formed in the printed circuit board 11.

However, since the conventional backlight assembly is fixed and assembled by using a plurality of fixing screws on one printed circuit board 11, it takes a long time to assemble the plurality of printed circuit boards, thereby reducing productivity.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a backlight assembly and a method of manufacturing the same, which can shorten the assembly time and tightly adhere the light source module to the bottom chassis.

In order to achieve the above object, the present invention provides a light source for supplying light, a light source module mounted with the light source and formed at least one coupling hole, and a protrusion inserted into the coupling hole corresponding to the coupling hole. The bottom chassis includes a bottom chassis, and the bottom chassis and the light source module are tightly fixed by coupling the protrusion and the coupling hole.

The light source is characterized in that the light emitting diode.

The protrusion is formed to protrude toward the upper side of the bottom chassis.

Further comprising a pressure means for modifying the shape of the protrusion, and pressing the up and down using the pressure means to the protrusion to secure the edge of the coupling hole by the upper end of the protrusion larger than the coupling hole.

On the other hand, the protrusion may form a 'c' shaped incision in the bottom chassis and may be formed to protrude in a rectangular shape formed by pushing the cut-out portion upward.

In addition, the protrusion is formed by attaching a rectangular plate erected at right angles to the bottom chassis.

Here, the protrusion formed in the rectangular plate is brought into close contact with the edge of the coupling hole, and then the pressure is applied to the protrusion to open the protrusion to both sides, thereby fixing the light source module.

In addition, the protrusion formed by the rectangular plate is brought into close contact with the edge of the coupling hole, and then the twisted protrusion is fixed by covering the light source module by twisting the protrusion.

In order to achieve the above object, the present invention comprises the steps of providing a light source module is mounted with a light source and the coupling hole is formed, providing a bottom chassis with a protrusion corresponding to the coupling hole, and the coupling hole in the And inserting a protrusion, and deforming the protrusion to fix the light source module to the bottom chassis.

In the providing of the bottom chassis, the protrusions formed on the bottom chassis may further include protruding in a trapezoidal shape.

In addition, the step of fixing the light source module in close contact with the bottom chassis further comprises pressing the up and down using the pressure means to the protrusion to fix the edge of the coupling hole by making the upper end of the protrusion larger than the coupling hole. .

On the other hand, in the step of providing the bottom chassis, the protrusion is a step of forming a 'c' shaped incision in the bottom chassis and the step of forming the rectangular plate formed at right angles by pushing the cut portion to the upper side to protrude. Include.

In the providing of the bottom chassis, the protrusion may further include forming a rectangular plate erected at right angles to the bottom chassis.

Here, the step of fixing the light source module in close contact with the bottom chassis is fixed by pressing the protrusion formed in the rectangular plate to the corner of the coupling hole and then applying pressure to the protrusion to open both sides of the protrusion module to cover the light source module. It further comprises the step.

The fixing of the light source module in close contact with the bottom chassis may further include fixing the protrusion formed by the rectangular plate to the corner of the coupling hole and then twisting the protrusion to fix the twisted protrusion by covering the light source module. .

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

The present invention forms a protrusion on the bottom chassis of the metal material, and forms a coupling hole for coupling with the protrusion on the printed circuit board, and then inserts the protrusion into the coupling hole to place the light source module on the bottom chassis using pressure means. The light source module is combined with the bottom chassis by deforming all protrusions in a single process. Here, specific embodiments will be described according to the shape of the protrusion and the physical method of deforming the protrusion.

In the embodiment of the present invention, for convenience of description, only one light source module and one row of protrusions corresponding thereto are illustrated, but in order to mount a plurality of light source modules in one bottom chassis, a plurality of row protrusions should be formed correspondingly. .

[First Embodiment]

2 is a perspective view illustrating an assembly of a light source module and a bottom chassis according to a first embodiment of the present invention, and FIGS. 2A to 2D are views illustrating an assembly process of a backlight assembly according to a first embodiment of the present invention.

Referring to FIG. 2, a backlight assembly according to the present invention includes a plurality of red, green, and blue LEDs 120 mounted on a printed circuit board 110, and combining at least one or more combinations with a bottom chassis 200. The light source module 100 having the hole 130 is provided.

The bottom chassis 200 is a metal material, and a protrusion 210 corresponding to a coupling hole 130 formed on the printed circuit board 110 of the light source module 100 is formed in one-to-one correspondence, and the protrusion 210 is a coupling hole. The position is aligned so that it can be inserted into 130. Here, the protrusion 210 formed in the bottom chassis 200 of the backlight assembly according to the first embodiment of the present invention protrudes in a trapezoidal shape.

The protrusion 210 is inserted into the coupling hole 130 to be deformed by the pressure of the external pressure means 300 and 301 to fix the light source module 100 to the bottom chassis 200. Here, the upper surface of the deformed protrusion 210 'is formed larger than the coupling hole 130 to firmly fix the printed circuit board 110 to the bottom chassis 200.

In the method of assembling the backlight assembly according to the first embodiment of the present invention, after forming the coupling hole 130 in the light source module 100 and forming the protrusion 210 in the bottom chassis 200 in accordance with the coupling hole 130, Combining the coupling hole 130 of the light source module 100 with the bottom chassis 200 in accordance with the protrusion 210, and applying pressure to the pressure means 300, 301 to deform the shape of the protrusion 210. Cover the printed circuit board 110 of (100). Accordingly, the deformed protrusion 210 ′ fixes the light source module 100 on the bottom chassis 200 while pressing the printed circuit board 110 of the light source module 100 from above.

First, as illustrated in FIGS. 2A and 2B, the protrusion 210 of the bottom chassis 200 and the coupling hole 130 formed in the light source module 100 are aligned and inserted. The protrusion 210 of the inserted bottom chassis 200 protrudes to the outside of the coupling hole 130. 2C and 2D, the protrusion 210 is deformed by applying pressure up and down using the pressure means 300 and 301. At this time, the protrusion 210 is deformed so that the light source module 100 is firmly fixed to the bottom chassis 200. As described above, the present invention couples the light source module 100 to the bottom chassis 200 by forming a deformed protrusion 210 'by applying pressure to the protrusion 210 of the metal material using ductility and malleability of the metal.

Second Embodiment

3 is a perspective view illustrating an assembly of a light source module and a bottom chassis according to a second embodiment of the present invention, and FIGS. 3A to 3D are views illustrating an assembly process of a printed circuit board and a bottom chassis according to a second embodiment of the present invention. to be.

3 has the same components except that the shape of the protrusion 130 is different from that of FIG. 2. Therefore, the description of the same components will be omitted.

Referring to FIG. 3, the bottom chassis 200 includes a plurality of protrusions 220 having a rectangular plate perpendicular to the coupling holes 130 formed on the light source module 100 in a one-to-one correspondence. Protruding portion 220 forms a 'c' shaped incision in the bottom chassis 200 and is formed by pushing the cut surface upwards.

The procedure for fixing the light source module 100 and the bottom chassis 200 of the second embodiment as shown in Figure 3a to 3d, to form a coupling hole 130 in the light source module 100 and the coupling hole ( After forming a plurality of protrusions 220 having a rectangular plate perpendicular to the bottom chassis 200 so as to correspond to 130, the coupling holes 130 formed in the light source module 100 are inserted in accordance with the protrusion 220. Then, the protrusion 220 is pressed using the upper pressure means 310 for pressing the upper surface of the protrusion 220 and the support means 311 for supporting the opening formed by the protrusion 220. In this way, the protrusion 220 is pressed to deform the shape of the protrusion 220 to cover the printed circuit board 110 of the light source module 100. Accordingly, the deformed protrusion 220 ′ fixes the light source module 100 on the bottom chassis 200 while pressing the printed circuit board 110 of the light source module 100 from above.

Next, a method of assembling the backlight assembly according to the second embodiment of the present invention will be described with reference to FIGS. 3A to 3D.

3A and 3B, after aligning the protrusion 220 of the bottom chassis 200 and the coupling hole 130 formed in the light source module 100, the coupling hole 130 is inserted into the protrusion 200. . Accordingly, the coupling hole 130 is inserted into the protrusion 220 of the bottom chassis 200 so that the protrusion 220 protrudes out of the printed circuit board 110. Next, as shown in FIGS. 3C and 3D, pressure is applied using the pressure means 310 and the support means 311 to deform the protrusion 220 into a bilaterally spaced form. As shown in FIG. 3D, the modified protrusion 220 ′ securely fixes the light source module 100 to the bottom chassis 200. At this time, it is possible to allow deformation of the protrusions within a range that is not electrically and thermally affected.

Third Embodiment

4A and 4B are views illustrating the shape of the modified protrusion according to the third embodiment of the present invention.

In the third embodiment, after combining the shape of the protrusion 220 as in the second embodiment with the coupling hole 130 of the light source module 100, the protrusion 220 is twisted to fix the light source module 100.

The coupling hole 130 of the light source module 100 is combined with the bottom chassis 200 to fit the protrusion 220, and the protrusion 220 is twisted to deform the shape of the printed circuit board 110 of the light source module 100. Cover it. Accordingly, the light source module 100 is fixed on the bottom chassis 200 while the deformed protrusion 220 ″ presses the printed circuit board 110 from above.

[Example 4]

5 is a perspective view illustrating an assembly of a light source module and a bottom chassis according to a fourth embodiment of the present invention, and FIGS. 5A to 5C are views illustrating an assembly process of a backlight assembly according to a fourth embodiment of the present invention.

Referring to FIG. 5, the light source module 100 of the present invention is mounted on a plurality of red, green, and blue LEDs 120 on a printed circuit board 110, and coupled to a plurality of bottom chassis 200. The hole 130 is formed.

The bottom chassis 200 has a plurality of protrusions 230 formed in one-to-one correspondence with the coupling holes 130 formed on the printed circuit board 110 of the light source module 100, and the protrusions 230 are coupling holes. The position is aligned so that it can be inserted into 130. The protrusion 230 of the fourth embodiment is formed such that two rectangular plates having a gap protrude from the bottom chassis 200. The protrusion 230 is in close contact with the edge of the coupling hole 130 formed in the light source module 100, and then the mechanical pressure is applied between the two protrusions to open the protrusions to both sides to fix the printed circuit board 110 by pressing it.

Referring to FIG. 5A, a coupling hole 130 is inserted into the protrusion 230 of the bottom chassis 200 to protrude the protrusion 210. Referring to FIG. 5B, the protrusion 230 and the coupling hole 130 are coupled to depress the protrusion 230 by using a pressure device having a sharp tip in the state where the protrusion 230 protrudes upward. As illustrated in FIG. 5C, when the pressure is applied through the pressure device, the deformed protrusion 230 ′ is formed to firmly fix the light source module 100 to the bottom chassis 200.

Here, the protrusion 230 may be twisted as described above to form a deformed protrusion to fix the light source module 100 to the bottom chassis 200.

As described above, the backlight assembly and the assembly method thereof according to the present invention can greatly improve productivity by fixing the light source module to the bottom chassis by modifying the shape of the protrusion formed in the bottom chassis during the assembly process of the light source module and the bottom chassis. have.

In addition, since the screws fixing the printed circuit board and the bottom chassis included in the light source module are not used, cost reduction can be obtained.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. You will understand that you can.

Claims (15)

A light source for supplying light; A light source module in which the light source is mounted and at least one coupling hole is formed; A bottom chassis having a protrusion formed in the coupling hole corresponding to the coupling hole; And the bottom chassis and the light source module are tightly fixed by coupling the protrusion and the coupling hole. The method of claim 1, And the light source is a light emitting diode. The method of claim 1, The protrusion assembly protrudes toward the upper side of the bottom chassis. The method of claim 3, wherein And a pressure means for modifying the shape of the protrusion, and pressing up and down by using the pressure means on the protrusion to fix an edge of the coupling hole by making the upper end of the protrusion larger than the coupling hole. . The method of claim 1, The protrusion is a backlight assembly, characterized in that to form a '' 'shaped incision in the bottom chassis and to protrude in a rectangular shape by pushing the cut portion upward. The method of claim 1, And the protrusion forms a rectangular plate erected at right angles to the bottom chassis. The method according to any one of claims 5 and 6, And a protrusion formed by the rectangular plate in close contact with an edge of the coupling hole, and then applying pressure to the protrusion to open the protrusion to both sides to cover the light source module and to fix the protrusion. The method according to any one of claims 5 and 6, And a protrusion formed by the rectangular plate in close contact with an edge of the coupling hole, and then twisting the protrusion to fix the protrusion to cover the light source module. Providing a light source for supplying light, and a light source module in which the light source is mounted and the coupling hole is formed; Providing a bottom chassis in which protrusions are formed corresponding to the coupling holes; Inserting the protrusion into the coupling hole; And deforming the protrusion to fix the light source module to the bottom chassis. The method of claim 9, In preparing the bottom chassis, And a protrusion formed in the bottom chassis to protrude in a trapezoidal shape. The method of claim 10, The step of fixing the light source module in close contact with the bottom chassis, And pressing up and down by using pressure means on the protrusion to fix an edge of the coupling hole so that an upper end of the protrusion is larger than the coupling hole. The method of claim 9, In preparing the bottom chassis, And forming a 'c' shaped incision in the bottom chassis and pushing the cut portion upward to form a rectangular plate formed at a right angle to protrude. The method of claim 9, In preparing the bottom chassis, And the projecting portion further comprises forming a rectangular plate erected at right angles to the bottom chassis. The method according to any one of claims 12 and 13, The step of fixing the light source module in close contact with the bottom chassis, And attaching the protrusion formed by the rectangular plate to the edge of the coupling hole and then applying pressure to the protrusion to fix the protrusion to both sides to cover and press the light source module to fix the protrusion. The method according to any one of claims 12 and 13, The step of fixing the light source module in close contact with the bottom chassis, And fixing the protrusion formed by the rectangular plate to the edge of the coupling hole and twisting the protrusion to fix the twisted protrusion by covering the light source module.

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