KR20100002971A - Socket and backlight unit using the same - Google Patents

Abstract

PURPOSE: A socket and a BLU(Backlight Unit) using a coupling structure are provided to implement a thin shape by improving a coupling structure of a socket which a lamp is connected with a PCB(Printed Circuit Board). CONSTITUTION: A terminal(32) comprises first and second connection units. The first connection unit has a top which is opened so that a lamp(20) be connected in the top to the lower part. The second connection unit prepares in the first connection unit. And the lower part is opened so that lamp be connected in the lower part to the top. A housing(31) comprises the first and second connection hole. The first connection hole settles the terminal on the top of a bottom chassis(10). In order that in the first connection hole, the lamp is connected to the top in accord with the first connection unit. In order that in the second connection hole, an inverter is connected in accord with the second connection unit.

Description

Socket and backlight unit using the same {SOCKET AND BACKLIGHT UNIT USING THE SAME}

The present invention relates to a socket and a backlight unit using the same, and more particularly, to a socket and a backlight unit using the same to improve the coupling structure of a printed circuit board configured with an inverter and a socket to which a lamp is connected. .

In general, the liquid crystal display cannot emit light by itself, and thus displays an image by irradiating the liquid crystal panel of the liquid crystal display using a separate light source. Therefore, the liquid crystal display is provided with a backlight unit to irradiate light to the liquid crystal panel.

Here, the backlight unit is divided into an edge method and a direct method according to the installation position of the lamp, the edge method is a method in which the lamp is arranged on one side or both sides of the diffuser plate for guiding the light, the direct method is directly below the diffuser plate. A plurality of lamps are arranged in the lamp to irradiate light toward the liquid crystal panel.

In addition, the backlight unit is provided with an LCD panel in front of the bottom chassis, and a plurality of lamps therebetween, and a plurality of sockets for connecting the power inverter and the lamp while being fixed to the bottom chassis.

In the case where the cold cathode fluorescent lamp is applied as a lamp, a plurality of sockets are provided on the left side and the right side or the upper side and the lower side of the bottom chassis, and the lamp connection pins of the cold cathode fluorescent lamp are connected to both sockets of the cold cathode fluorescent lamp.

At this time, the connection of the lamp connection pin of the cold cathode fluorescent lamp (hereinafter referred to as the "lamp") has been previously made by soldering, etc. However, a lot of manpower and time are required for the soldering operation. It can be connected by directly fitting to the terminal housed in the terminal.

In addition, the terminal is provided with lamp connection parts to be in close contact with each other by self-elasticity, and when the lamp connection pin is inserted into the closely contacted lamp connection part, the cold cathode fluorescent lamp or the connection pin is directly pressed by the force enough to overcome the self elasticity To be connected to the

In addition, the lower portion of the terminal is provided with a substrate connecting portion to be fitted with the printed circuit board constituting the inverter, the housing extends downward to support the printed circuit board from the lower portion.

Accordingly, the socket is fitted into the bottom chassis to protrude from the upper portion of the bottom chassis so that the lamp can be connected to the upper portion, and the lower portion of the socket protrudes further from the lower side of the substrate so that the inverter circuit can be connected from the side.

However, when the components constituting the inverter circuit of the printed circuit board are provided toward the bottom chassis, since the printed circuit board may not be in close contact with the bottom chassis, the components constituting the inverter circuit are installed on the opposite side of the bottom chassis. Therefore, since the socket must be formed to be protruded in consideration of the thickness of the component and the substrate to be connected to the printed circuit board, there is a problem that it is difficult to thin.

The present invention has been made in view of the above necessity, and an object of the present invention is to provide a socket and a backlight unit using the same to improve the coupling structure of a printed circuit board configured with an inverter and a socket to which a lamp is connected. .

A socket of the present invention according to an aspect for achieving the above object is provided in parallel with the first connection portion and the first connection portion which is opened upwardly so that the lamp can be connected from the top to the bottom, and connected from the bottom to the top A terminal provided with a second connecting portion which is opened downwardly so that the terminal is provided; And a housing provided with a second connecting hole corresponding to the second connecting portion so that the inverter can be connected.

In this case, it is preferable that the first connection portion and the second connection portion are provided integrally, and the connection directions are shifted from each other.

According to an aspect of the present invention, there is provided a backlight unit including a first connection part installed in a bottom chassis and connected to a lamp, and a second connection part provided in parallel with the first connection part and connected to a printed circuit board. And a plug provided perpendicularly to an upper surface of the printed circuit board so as to be vertically connected from the lower part to the upper part.

The first connecting portion and the second connecting portion may be provided integrally with each other, and the connecting directions may be shifted from each other.

The printed circuit board includes a support member for vertically supporting the plug, wherein the support member is coupled to the printed circuit board together with the plug, and the support member is positioned to determine a position when the printed circuit board is coupled to the printed circuit board. It is preferable to include a crystal protrusion.

In addition, it is preferable that the end portion of the plug includes a seating portion formed along the outer circumferential surface of the plug so as to be prevented from being inserted and separated while increasing the connection force with the second connecting portion.

In addition, the printed circuit board has a component for the inverter configuration is disposed between the plug installed in the upper portion and the adjacent plug, it is preferable that the bottom chassis includes a receiving hole for receiving the component.

According to another aspect of the present invention, there is provided a backlight unit of the present invention, comprising: a socket provided with a bottom chassis provided with a first connecting portion to which a lamp is connected and a terminal having a second connecting portion to be connected to a printed circuit board; 2 a plug provided perpendicularly to the upper surface of the printed circuit board so as to be connected vertically to the connecting portion, and installed between the bottom chassis to guide the plug to be connected to the second connecting portion of the socket, and the upper printed circuit board and the bottom chassis. It includes a board guide for insulating between.

In this case, it is preferable that the first connection portion and the second connection portion are provided integrally, and the connection directions are shifted from each other.

The printed circuit board includes a supporting member for vertically supporting the plug, the supporting member is coupled to the printed circuit board together with the plug, and the supporting member is positioned to determine a position when the printed circuit board is coupled to the printed circuit board. It is preferable to include a crystal protrusion.

In addition, it is preferable that the end portion of the plug includes a seating portion formed along the outer circumferential surface of the plug so as to be prevented from being inserted and separated while increasing the connecting force.

On the other hand, the printed circuit board has a component for the inverter configuration is disposed between the plug installed in the upper portion and the adjacent plug, the bottom chassis preferably comprises a receiving hole for receiving the component.

In addition, the board guide preferably includes an accommodating groove extending to one side to accommodate a part accommodated in the accommodating hole.

As described above, the socket of the present invention and the backlight unit using the same include a socket having a first connection part and a second connection part connected to each other and a plug connected perpendicularly to a printed circuit board. Since the upper surface of the printed circuit board is provided to intersect with the first connection part, the upper surface of the printed circuit board may be in close contact with the bottom surface of the bottom chassis, thereby reducing the backlight unit.

In addition, by forming a receiving hole of the bottom chassis, including the board guide formed with a receiving groove, the components installed in the printed circuit board is accommodated in the receiving hole and the receiving groove has the effect of eliminating the difficulty of thinning due to the component.

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

In the following description of the present invention, the terms defined are defined in consideration of functions in the present invention, and should not be understood as a meaning of limiting the technical components of the present invention.

1 is a cross-sectional view showing a backlight unit according to an embodiment of the present invention. 2 is an exploded cross-sectional view illustrating a backlight unit according to an embodiment of the present invention. In addition, Figure 3 is a perspective view showing a printed circuit board and a socket according to an embodiment of the present invention. On the other hand, Figure 4 is a cross-sectional view showing a part fastening structure according to an embodiment of the present invention.

1 to 4, the backlight unit 100 according to an embodiment of the present invention is installed as a light source of a liquid crystal display as shown in FIGS. 1 to 3. A liquid crystal display device in which 100 is installed is provided with a liquid crystal panel not shown in front, and a top chassis 1 coupled to the backlight unit 100 to fix the liquid crystal panel is provided.

In addition, the backlight unit 100 may include at least one lamp 20, a bottom chassis 10 having a predetermined size so that the plurality of lamps 20 may be installed, and the lamp 20 at the bottom chassis 10. And a socket 30 for fixing the lamp 20 to the bottom chassis 10 and a plug 53 connected to the socket 30 and a printed circuit board 50 on which the plug 53 is installed. .

Here, the bottom chassis 10 is bent upward, downward, left and right edges are coupled to the top chassis 1, and provides a space in which the lamp 20 can be installed in the center. At least one socket 30 is installed at the edge to allow the lamp 20 to be installed.

In this case, the socket 30 installed in the bottom chassis 10 is installed in one of two methods of bolting or fitting to both sides of the bottom chassis 10 to correspond to the connection pins 21 provided on both sides of the lamp 20. . And the socket 30 is installed in the bottom chassis 10 at regular intervals so that the lamp 20 can be installed side by side.

Therefore, the bottom chassis 10 is provided with at least one or more socket holes 11 in which the sockets 30 are installed at regular intervals. In addition, the bottom chassis 10 has a reflective surface, or a reflection sheet (not shown) is coupled to reflect the light of the lamp 20.

In addition, the upper side of the bottom chassis 10 is coupled along the edge side side 3 for protecting the socket 30 and the lamp 20, so that at least one seat can be installed thereon, and is installed thereon A middle mold 2 is provided to allow the sheet to be fixed. Since the side mold 3 and the middle mold 2 are well known techniques, detailed descriptions thereof will be omitted.

The socket 30 includes a terminal 32 connected to the connecting pin 21 of the lamp 20, and a housing 31 in which the terminal 32 is installed. The terminal 32 is provided with a first connecting portion 32a to which the connecting pin 21 of the lamp 20 is connected, and a second connecting portion 32b to which the plug 53 is connected. Here, the lamp 20 has a structure in which the first connecting portion 32a and the second connecting portion 32b are integrally formed or electrically connected to each other.

Accordingly, the first connecting portion 32a is opened upward so that the connecting pin 21 of the lamp 20 can be connected from the top to the bottom, and the second connecting portion 32b is connected to the plug 53 from the bottom to the top. So that it is opened downward. In addition, the first connecting portion 32a is formed to extend upward from both sides, and the second connecting portion 32b is formed extending from both sides downward to connect the first connecting portion 32a and the second connecting portion 32b. It is provided so that a direction may mutually shift | deviate.

Accordingly, the housing 31 is provided with a first connection hole 31a, which is opened upwardly so that the lamp 20 can be fitted in the first connection portion 32a, and downwards so that the plug 53 can be inserted and connected. The second connection hole 31b is opened.

At this time, one side of the first connection hole (31a) is provided with a support portion 31c which is in close contact with the outer circumference of the lamp 20, the first connection portion (32a) extending one side is fitted into the first connection portion (32a) lamp 20 The locking part 32c is provided so that the connection pin 21 of () may be supported. In addition, the first connecting portion 32a and the second connecting portion 32b may be made of an elastic material so as to be clamped in a form surrounding the connecting pin 21 and the plug 53.

In addition, the second connection hole 31b is provided with an induction part 31d having an inclination in which the plug 53 is easily guided to the second connection part 32b.

In addition, the socket 30 is bolted or fitted to the top of the socket hole 11 of the bottom chassis 10. The printed circuit board 50 is installed below the bottom chassis 10. At this time, the board guide 40 is provided between the bottom chassis 10 and the printed circuit board 50 to insulate.

In this case, the board guide 40 is provided as an insulating plate having a predetermined thickness. The plug 53 of the printed circuit board 50 is connected to the second connecting portion 32b of the socket 30 through the second connecting hole 31b. Guide holes 41 are provided to allow connection.

The printed circuit board 50 constitutes an inverter circuit (not shown) and includes at least one plug 53 and at least one component 51 constituting the inverter. At this time, the component 51 is not limited to the component 51 constituting the inverter.

The plug 53 is connected to the inverter circuit of the printed circuit board 50 and is connected to the upper portion of the printed circuit board 50 so as to be vertically connected to the second connecting portion 32b provided at the terminal 32 of the socket 30. It is installed perpendicular to the surface. At this time, the plug 53 is installed in a form that is partially embedded through the printed circuit board 50.

In addition, when the plug 53 is installed on the printed circuit board 50, the support member 54 supporting the plug 53 in the vertical state while guiding the plug 53 to be vertically installed on the upper surface of the printed circuit board 50 is provided. Is prepared. At this time, the support member 54 is provided with a synthetic resin material of the insulating material, it is fixed to the printed circuit board 50 in the form of partially wrapping the plug 53.

And the support member 54 is provided with a positioning projection 55 on one side to determine the position according to the installation direction of the plug 53. The printed circuit board 50 is provided with a positioning groove 52 into which the positioning protrusion 55 is inserted. In addition, the guide hole 41 of the board guide 40 is provided to have a size that the support member 54 is inserted.

Accordingly, the plug 53 is vertically floated from the lower portion to the upper portion of the second connection portion 32b of the socket 30, and the printed circuit board 50 to which the plug 53 is coupled is the bottom surface of the bottom chassis 10. It will be in close contact with the stacked form. Since the bottom chassis 10 and the printed circuit board 50 are insulated from each other by the board guide 40, the structure is thinner.

At this time, in order to prevent the plug 53 from being easily separated from the second connecting portion 32b while being connected to the second connecting portion 32b, the plug 53 has a groove or hole shape as illustrated in FIG. 5. A seating portion 53a may be provided.

On the other hand, the bottom chassis 10 allows the component 51 of the inverter installed in the printed circuit board 50 to be accommodated between the socket hole 11 to which the socket 30 is coupled and the adjacent socket hole 11. At least one accommodation hole 12 is provided.

As shown in FIG. 4, the receiving guide 42 is provided to extend the board guide 40 in the direction of the adjacent socket hole 11 so as to cover the component 51 accommodated in the socket hole 11. At this time, the board guide 40 is provided so that the extended portion so that the receiving groove 42 can be formed to be fitted from the lower portion to the upper portion in the receiving hole 12 of the bottom chassis 10, and accommodated in the extended portion The groove 42 is formed to be opened downward.

Therefore, when the printed circuit board 50 is connected to the socket 30 by the plug 53 in a state where the printed circuit board 50 is closely attached to the bottom chassis 10 with the board guider therebetween, the plug 53 of the printed circuit board 50 Components 51 provided between the adjacent plugs 53 are accommodated in the accommodation grooves 42, respectively.

The component 51 constituting the inverter circuit of the printed circuit board 50 is provided on a surface facing the bottom chassis 10 and is disposed between the socket hole 11 and the adjacent socket hole 11 of the bottom chassis 10. It is arranged to be located at. On the other hand, the bottom of the printed circuit board 50 is provided with a board cover 4 coupled to the bottom of the bottom chassis 10 to cover the printed circuit board 50.

Although the technical idea of the socket of the present invention and the backlight unit using the same has been described with the accompanying drawings, this is by way of example and not by way of limitation of the present invention.

Therefore, it is obvious that any person with ordinary skill in the art can make various modifications and imitations such as dimensions, shapes, structures, etc. without departing from the scope of the technical idea of the present invention. It is included in the scope of the technical idea of this invention.

1 is a cross-sectional view showing a backlight unit according to an embodiment of the present invention.

Figure 2 is an exploded cross-sectional view showing a backlight unit according to an embodiment of the present invention.

3 is a perspective view showing a printed circuit board and a socket according to an embodiment of the present invention.

Figure 4 is a cross-sectional view showing a part fastening structure according to an embodiment of the present invention.

5 is a cross-sectional view showing a plug of a backlight unit according to another embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: backlight unit 10: bottom chassis

20: lamp 30: socket

40: board guide 50: printed circuit board

Claims (15)

A terminal provided in parallel with the first connection part opened upwardly to allow the lamp to be connected from the upper part to the lower part, and a second connection part provided in parallel with the lower part so as to be connected from the lower part to the upper part; The terminal is fixed to the top of the bottom chassis, the first connection hole is provided in accordance with the first connecting portion to be connected to the lamp, the second connection is matched to the second connecting portion so that the inverter can be connected And a housing provided with a hole. The method of claim 1, The first connecting portion and the second connecting portion is provided integrally, characterized in that the connection direction is provided to be different from each other. A socket provided at a bottom chassis, the terminal having a first connection portion connected to a lamp, and a second connection portion provided in parallel with the first connection portion and connected to the printed circuit board; And a plug provided perpendicularly to an upper surface of the printed circuit board so as to be vertically connected from a lower portion to an upper portion of the second connection portion. The method of claim 3, The first connecting portion and the second connecting portion is provided integrally, characterized in that the connection direction is provided to be different from each other. The method of claim 3, The printed circuit board includes a backing unit comprising a support member for vertically supporting the plug. The method of claim 5, The support member is coupled to the printed circuit board with the plug, The support member is a backlight unit, characterized in that it comprises a positioning projection for determining the position when bonded to the printed circuit board. The method of claim 3, The end of the plug is a backlight unit, characterized in that the mounting portion is formed along the outer peripheral surface to prevent the insertion and separation while increasing the connection force with the second connecting portion. The method of claim 3, In the printed circuit board, a component for forming an inverter is disposed between an upper plug and an adjacent plug. And the bottom chassis includes a receiving hole in which the component is accommodated. A socket provided at a bottom chassis and provided with a terminal having a first connection portion to which a lamp is connected and a second connection portion to be connected to the printed circuit board; A plug provided perpendicularly to an upper surface of the printed circuit board so as to be vertically connected to the second connection unit; And a board guide installed between the bottom chassis to guide the plug to be connected to the second connection part of the socket and to insulate the upper printed circuit board from the bottom chassis. The method of claim 9, The first connecting portion and the second connecting portion is provided integrally, characterized in that the connection direction is provided to be different from each other. The method of claim 9, The printed circuit board includes a backing unit comprising a support member for vertically supporting the plug. The method of claim 11, The support member is coupled to the printed circuit board with the plug, The support member is a backlight unit, characterized in that it comprises a positioning projection for determining the position when bonded to the printed circuit board. The method of claim 9, The end of the plug is a backlight unit, characterized in that the mounting portion is formed along the outer peripheral surface to prevent the insertion and separation while increasing the connecting force to the second connection portion. The method of claim 9, In the printed circuit board, a component for configuring an inverter is disposed between a plug installed at an upper portion and an adjacent plug. And the bottom chassis includes a receiving hole in which the component is accommodated. The method of claim 14, The board guide may include a receiving groove extending to one side to accommodate a part accommodated in the receiving hole.

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