KR20090004012A

KR20090004012A - Lamp socket

Info

Publication number: KR20090004012A
Application number: KR1020070067883A
Authority: KR
Inventors: 조주완; 최성식
Original assignee: 삼성전자주식회사
Priority date: 2007-07-06
Filing date: 2007-07-06
Publication date: 2009-01-12

Abstract

A lamp socket decreasing the number of components and simplifying the operation process are provided to increase the reliability of product by improving connecting force between a lamp and the lamp socket by using a contact terminal and a housing. A lamp socket(500) includes a contact terminal(550) and a housing. The contact terminal is electrically connected to lamp and fixes the lamp. The housing is connected to the contact terminal. The contact terminal comprises the contact body part(551), a first contact part(553) and a first connecting part. The first contact element is formed to be extended from the contact body portion. The housing includes a housing body part(511), a guide unit(517) and a second connecting part. The housing body part accommodates the contact terminal. The guide unit is formed within the housing body part in order to guide the location of the first contact part.

Description

Lamp socket {Lamp socket}

The present invention relates to a lamp socket, a backlight unit having the same, and a method of manufacturing a backlight unit, and more particularly, to a lamp socket having a reduced number of parts and a simplified work process, and a backlight unit having the same and a method of manufacturing a backlight unit. .

The liquid crystal display device displays a desired image on the liquid crystal display panel by adjusting the amount of light transmitted according to the image signals applied to the plurality of control switches arranged in a matrix form. Since the LCD does not emit light by itself, a light source such as a backlight is required. Generally, a lamp unit including a lamp and an inverter for supplying power to the lamp is used as the light source.

Most of the methods used for fixing lamps are holding types. These holding types are soldered wires to the lamp leads and then bonded to the housing using a silicone-based elastic material. It is a method of coupling to an inverter. However, this method requires manual soldering of the lamp leads and wires by hand, and all operations such as fastening to the holder and fastening of the connector are performed by hand, which leads to various problems such as assembly and productivity of each part and the number of parts. Have

On the other hand, in the case of the socket type (Socket Type) improved by this, the socket is used as a component for fixing the lamp. This improves the assembly and workability compared to the conventional soldering and holding type using wires, but a large number of parts are used per socket for fixing the lamp, which increases the number of work processes and the cost. There is this.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a lamp socket, a backlight unit having the same, and a method of manufacturing a backlight unit having a reduced number of parts and a simplified work process.

According to an embodiment of the present invention, a contact terminal electrically connected to a lamp and fixing the lamp; And a housing coupled to the contact terminal, wherein the contact terminal comprises: a contact body part; A first contact portion formed to extend from the contact body portion and to which the lamp is disposed and fixed; And a first fastening part formed on one surface of the contact body part, wherein the housing comprises: a housing body part accommodating the contact terminal; A guide part formed in the housing body part to guide the position of the first contact part; And a second fastening part formed on the housing body part and fastened to the first fastening part of the contact terminal.

The contact terminal further includes a second contact portion coupled to the inverter and electrically connected to the inverter, and the housing further includes an opening formed in the housing body portion to expose a portion of the second contact portion.

The contact terminal further includes a pressing portion formed at one end of the contact body portion.

The pressing portion extends in a direction different from an extending direction of the contact body portion.

The first contact portion has a head formed of a structure having elasticity, and a fixed strength of a lamp disposed and fixed to the head is variable.

The heads are spaced apart from each other and consist of first and second heads arranged oppositely.

The first head and the second head are formed to be interconnected.

The first fastening portion and the second fastening portion include a fastening protrusion or a fastening hole.

The second contact portion is formed in a structure having elasticity.

According to another embodiment of the present invention, a lamp having a lamp tube and lamp leads provided at both ends of the lamp tube; And a lamp socket configured to apply power to the lamp and to fix the lamp, wherein the lamp socket is electrically connected to the lamp and fixes the lamp. And a housing coupled to the contact terminal, wherein the contact terminal comprises: a contact body part; A first contact portion formed to extend from the contact body portion and to which the lamp lead is disposed and fixed; And a first fastening part formed on one surface of the contact body part, wherein the housing comprises: a housing body part accommodating the contact terminal; A guide part formed in the housing body part to guide the position of the first contact part; And a second fastening part formed on the housing body part and fastened to the first fastening part of the contact terminal.

The backlight unit further includes an inverter for supplying power to the lamp, the contact terminal further includes a second contact portion coupled to the inverter and electrically connected to the housing, and the housing includes a portion of the second contact portion. In order to expose, further comprises an opening formed in the housing body portion.

According to another embodiment of the present invention, a contact including a contact body portion, a first contact portion formed extending from the contact body portion, the lamp is disposed and fixed and a first fastening portion formed on one surface of the contact body portion Terminals; And a housing body part accommodating the contact terminal, a guide part formed in the housing body part to guide the position of the first contact part, and formed in the housing body part, the first fastening part of the contact terminal. Preparing a lamp socket having a housing including a second fastening portion to be fastened; Placing a lamp in a first contact portion of the lamp socket; And fixing the lamp to the first contact part.

The fixing of the lamp to the first contact unit may include pressing the contact terminal; And fastening a first fastening part of the contact terminal and a second fastening part of the housing.

Pressing the contact terminal includes disposing the first contact portion in the housing body portion via the guide portion.

The number of parts is reduced, the work process is simplified, the defect rate can be significantly reduced, and the overall manufacturing cost can be reduced.

In addition, it is possible to improve the fastening force between the lamp and the lamp socket, thereby obtaining the effect of improving the product reliability.

1 is a schematic perspective view of a lamp socket according to an embodiment of the present invention, Figure 2a is a perspective view showing a housing of the lamp socket, Figure 2b is a perspective view showing a contact terminal of the lamp socket.

1 to 2B, the lamp socket 500 includes a housing 510 and a contact terminal 550, and the housing 510 includes a housing body 511, an opening 513, and a second fastening portion. 515 and a guide portion 517, and the contact terminal 550 includes a contact body portion 551, a first contact portion 553, a second contact portion 555, a pressing portion 557, and a first portion. The fastening part 559 is included.

The housing 510 is fastened to the contact terminal 550, and the contact terminal 550 is electrically connected to the lamp lead 420 of the lamp and fixes the lamp. In this case, a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) is used as the lamp. Cold-polarized fluorescent lamp (CCFL) is composed of a lamp tube (not shown) and the lamp lead 420 provided at both ends of the lamp tube, when the power is applied from the outside through the lamp lead 420, the discharge gas in the lamp tube is plasma The generated invisible light stimulates the fluorescent material layer to emit visible light to the outside.

The contact terminal 550 is in direct contact with the lamp lead 420, and is a component that fixes the lamp lead 420. The contact terminal 550 has a function of applying power supplied through the inverter described below to the lamp lead 420. Perform.

The contact terminal 550 is formed to extend from the contact body portion 551, the contact body portion 551, the first contact portion 553 to which the lamp lead 420 is disposed and fixed, and the contact body portion 551. The first fastening part 559 formed on one surface of the) and the second contact part 555 fastened to the inverter and electrically connected.

The contact body portion 551 extends in a generally vertical direction, and the first contact portion 553 is formed to be spaced apart from the contact body portion 551 by extending from one surface of the contact body portion 551, that is, the front surface. .

The first contact portion 553 has a head formed of an elastic structure, and the lamp lead 420 is disposed and fixed to the head of the first contact portion 553. In this embodiment, the head is composed of a first head 553a and a second head 553b, and the first head 553a and the second head 553b are opposed to each other and are spaced apart from each other. At this time, the first head 553a and the second head 553b are formed in a shape in which one end is bent to have elasticity. However, the structure having elasticity is not limited thereto, and may be variously modified. The lamp lead is disposed and fixed in a space between the first head 553a and the second head 553b, and is formed to enable left and right movement of the first head 553a and the second head 553b, and thus, the first head. The interval between the 553a and the second head 553b may be wider or narrower. As such, by adjusting the distance between the first head 553a and the second head 553b, the fixing strength of the lamp lead fixed to the first contact portion 553 can be varied.

In the present embodiment, the first head 553a and the second head 553b are separated from each other, but are not limited thereto. One end of the first head 553a and one end of the second head 553b may be mutually separated. In connection, both may be integrally formed.

The first fastening part 559 is formed to protrude toward the other surface of the contact body part 551, that is, the rear surface. That is, the first fastening part 559 is formed in the form of a hook or protrusion on the back of the contact body 551. The first fastening part 559 is fastened to the second fastening part 515 of the housing 510 to strengthen the fastening force between the contact terminal 550 and the housing 510. In the present embodiment, the first fastening part 559 is formed in the form of a hook or a protrusion, but is not limited thereto, and may be formed in the shape of a fastening groove or a fastening hole. If the first fastening part 559 is formed in the form of a fastening groove or a fastening hole, the second fastening part 515 is formed in the form of a hook or a protrusion.

The second contact portion 555 extends from one end of the contact body portion 551, and extends in a direction crossing the extension direction of the contact body portion 551, that is, in a horizontal direction. An inverter electrode (not shown) to be described below will be inserted into and electrically connected to the second contact portion 555. The second contact portion 555 may be formed in a structure having elasticity. In the present exemplary embodiment, one surface of a portion of the second contact portion 555 contacting the inverter electrode is formed in a folded shape to impart elasticity to the second contact portion 555, but is not limited thereto. It may be configured in the form.

The pressing unit 557 extends from the other end of the contact body 551, and extends in a direction intersecting with an extension direction of the contact body 551, that is, in a horizontal direction. The pressing unit 557 is used as an area for applying an external force to move the contact terminal 550 in the vertical direction. That is, when a force is applied to the pressing portion 557, the contact terminal 550 moves entirely into the housing body portion 511, and the first contact portion 553 moves along the guide portion 517. In addition, while the first fastening part 559 also moves downward, while being fastened with the second fastening part 515, the contact terminal 550 is prevented from being detached from the housing 510 by an external impact.

The housing body part 511 of the housing 510 provides a space for accommodating the contact terminal 550. The guide part 517 is formed in the housing body part 511 to guide the position of the first contact part 553 of the contact terminal 550.

The second fastening part 515 is formed on the rear surface of the housing body part 511 and is fastened to the first fastening part 559 of the contact terminal. In the present embodiment, the second fastening part 515 is formed in the form of a fastening groove or a fastening hole, but is not limited thereto, and may be formed in a fastening protrusion or a hook shape.

The opening 513 is formed at the lower end of the housing body portion 511 in a shape and size corresponding thereto to expose a portion of the second contact portion 555 and to allow the inverter electrode to be inserted therein.

3A to 5B illustrate a process of assembling a lamp socket and a lamp, and FIGS. 6 to 8 illustrate cross-sectional views corresponding to each process. Hereinafter, a process of assembling a lamp socket and a lamp will be described with reference to the drawings.

3A is a perspective view of a lamp socket with contact terminals disposed in a housing, FIG. 3B is a front view of the lamp socket, FIG. 3C is a side view of the lamp socket, FIG. 3D is a rear view of the lamp socket, and FIG. 6 is shown in FIG. 3A. Sectional drawing which cut | disconnected the lamp socket shown along the II 'line.

3A to 3D and 6, a lamp socket in which a contact terminal 550 is inserted into a housing 510 is assembled. The contact body portion 551 and the second contact portion 555 of the contact terminal 550 are disposed in the housing body portion 511 of the housing 510, and at least a portion of the first contact portion 553 is the housing body portion. 511 is disposed outside, and the first fastening part 559 and the second fastening part 515 are in a state before being fastened to each other. In addition, the inverter electrode 620 of the inverter is also in a state before being inserted into the second contact portion 555.

4A and 4B are a perspective view and a cross-sectional view showing a state in which a lamp is placed in a lamp socket, and FIG. 7 is a cross-sectional view of the lamp socket shown in FIG. 4A taken along line II-II '.

4A, 4B, and 7, the lamp lead is moved and the lamp lead 420 is disposed in the first contact portion 553 of the contact terminal. As such, when the lamp lead 420 is disposed between the first contact portion 553, that is, the first head and the second head, the first head and the second head are separated from each other by the thickness of the lamp lead 420. You lose. The reason is that there is no arrangement of components on the left and right sides of the first head and the second head that prevents the movement of the first head and the second head. In addition, the inverter electrode 620 of the inverter is in a state before being inserted into the second contact portion 555.

5A and 5B are perspective views and cross-sectional views illustrating a state in which a lamp is fixed to a lamp socket, and FIG. 8 is a cross-sectional view of the lamp socket of FIG. 5A taken along line III-III '.

5A, 5B, and 8, an external force is applied to the pressing portion 557 of the contact terminal in the direction of the arrow, that is, downward, so that the entire first contact portion 553 of the contact terminal is in the housing body portion 511. It is inserted.

When an external force is applied to the pressing portion 557 in the direction of the arrow, the contact body portion 551 moves downward, and as a result, the first contact portion 553 and the first fastening portion 559 also move downward. The first contact portion 553 moves along the guide portion 517, and an outer portion of the first contact portion 553 is in contact with the guide portion 517. As a result, while the first head and the second head of the first contact portion 553 are lowered inwardly by the guide portion 517, the strength of fixing the lamp lead 420 becomes higher, so that the lamp The lead 420 is more firmly fixed to the first contact portion 553.

In addition, while the first fastening part 559 also moves downward, while being fastened with the second fastening part 515, the contact terminal 550 is prevented from being detached from the housing 510 by an external impact.

Then, as shown in FIG. 8, when the inverter electrode 620 is inserted into the second contact portion 555, the second contact portion 555 also includes the pressing portion 557 and the contact body portion 551. Due to the external force transmitted through the elastic deformation, this force serves to more firmly fix the inverter electrode (620).

FIG. 9A is a schematic exploded perspective view of a liquid crystal display including a backlight unit having a lamp socket according to the present invention, and FIG. 9B is an enlarged view of a portion of the chassis of the liquid crystal display shown in FIG. 9A.

9A and 9B, the LCD may include an upper chassis 300, an LCD panel 100, driving circuit parts 220 and 240, a mold frame 800, a plurality of optical sheets 710, and a diffusion plate ( 720, lamp 400 and lower chassis 900.

The driving circuits 220 and 240 are connected to the LCD panel 100, include a gate side printed circuit board 224 for mounting a control IC and applying a predetermined gate signal to a gate line of the TFT substrate 120, and a control. A data side printed circuit board 244 for mounting an integrated circuit (IC) and applying a predetermined data signal to a data line of the TFT substrate 120, between the TFT substrate 120 and the gate side printed circuit board 224. And a gate side flexible printed circuit board 222 for connecting the TFTs, and a data side flexible printed circuit board 242 for connecting between the TFT substrate 120 and the data side printed circuit board 244.

The gate side and data side printed circuit boards 224 and 244 are connected to the gate side and data side flexible printed circuit boards 222 and 242 to apply a gate driving signal and an external image signal. In this case, the gate side and data side printed circuit boards 224 and 244 may be integrated to form a single printed circuit board. In addition, the flexible printed circuit boards 222 and 242 are equipped with a driving IC (not shown), and the LCD (Read, Green, Blue) signals generated from the printed circuit boards 224 and 244, digital power supplies, etc. To 100.

The upper chassis 300 is formed in a rectangular frame shape having a flat portion and a sidewall portion bent at right angles to prevent the LCD panel 100 and the driving circuit parts 220 and 240 from being separated from each other and at the same time to protect the LCD panel 100 and the driving circuit parts 220 and 240 from being impacted from the outside. A plurality of optical sheets 710 and a diffusion plate 720 are stacked from the base surface of the storage space formed under the mold frame 800, and the plurality of lamps 400 and the lamps 400 for fixing the plurality of lamps 400 and 400 in the lower chassis. The lamp socket 500 is disposed.

Lamp sockets 500 are fastened and fixed to one side and the other side of the lower chassis 900, and an inverter 600 is disposed on a lower surface of the lower chassis 900, and an inverter electrode (not shown) of the inverter 600. ) Is inserted into a second contact portion (not shown) of the lamp socket 500.

What has been described above is only an exemplary embodiment of a lamp socket, a backlight unit having the same, and a backlight unit manufacturing method according to the present invention, and the present invention is not limited to the above-described embodiment, which is claimed in the following claims. As will be apparent to those skilled in the art to which the present invention pertains without departing from the spirit of the present invention, the technical spirit of the present invention may be modified to the extent that various modifications can be made.

1 is a schematic perspective view of a lamp socket according to an embodiment of the present invention.

2A is a perspective view illustrating a housing of a lamp socket, and FIG. 2B is a perspective view illustrating a contact terminal of a lamp socket.

3A is a perspective view of a lamp socket with contact terminals disposed in the housing, FIG. 3B is a front view of the lamp socket, FIG. 3C is a side view of the lamp socket, and FIG. 3D is a rear view of the lamp socket.

4A and 4B are a perspective view and a sectional view showing a state in which a lamp is placed in a lamp socket.

5A and 5B are perspective views and cross-sectional views illustrating a state in which a lamp is fixed to a lamp socket.

FIG. 6 is a cross-sectional view of the lamp socket of FIG. 3A taken along line II ′. FIG.

FIG. 7 is a cross-sectional view of the lamp socket illustrated in FIG. 4A taken along line II-II ′.

FIG. 8 is a cross-sectional view of the lamp socket illustrated in FIG. 5A taken along line III-III ′.

* Description of the symbols for the main parts of the drawings *

400: lamp 500: lamp socket

510: housing 511: housing body portion

513: opening 515: second fastening portion

517: guide portion 550: contact terminal

551: contact body portion 553: first contact portion

555: second contact portion 557: pressing portion

559: first fastening portion

Claims

A contact terminal electrically connected to the lamp and fixing the lamp; And a housing coupled to the contact terminal,

The contact terminal,

Contact body portion; A first contact portion formed to extend from the contact body portion and to which the lamp is disposed and fixed; And a first fastening part formed on one surface of the contact body part.

The housing,

A housing body part accommodating the contact terminal; A guide part formed in the housing body part to guide the position of the first contact part; And a second fastening part formed in the housing body part and fastened to the first fastening part of the contact terminal.