KR100788400B1 - Power connector and direct backlight unit - Google Patents

Abstract

The present invention relates to a power supply connecting device of a direct type backlight device for electrically connecting the lead wires of a fluorescent lamp. A first pressurizing portion having a shape; and a second pressurizing portion extending from each central end of the first pressurizing portion and curved downward in a semicircular shape to the outside; And a third pressurizing part extending inclined outwardly from the second pressurizing part, the end portion of which is rounded in a semicircle shape and protruded upward and is connected in a horizontal direction.

The power connection device having the above configuration does not need a separate conductive cable to supply power to the internal electrode of the fluorescent lamp, and thus has a simple structure. As a result, the manufacturing and coupling process of the backlight assembly is simple and inexpensive. Stable bonding with and there is no fear of breaking the binding site.

Description

Fluorescent Lamp lead wire Connector and Direct-type Backlight assembly using kind}

1 is a view showing the structure of a cold cathode fluorescent lamp according to the prior art,

2 is a view showing a structure in which a cold cathode fluorescent lamp is coupled to a backlight device according to the prior art;

3 is a view showing a structure in which a conductive line of a fluorescent lamp according to the prior art is electrically connected;

4 is a perspective view showing a structure of a lead wire power supply device of a fluorescent lamp according to a first embodiment of the present invention;

5 is a view illustrating a state before a power supply device and a lead wire of a fluorescent lamp are coupled according to the first embodiment of the present invention;

6 is a view showing a state after the power connection device and the lead wire of the fluorescent lamp are coupled according to the first embodiment of the present invention;

7 is a view illustrating a substrate to which a power connection device according to a first embodiment of the present invention is coupled;

8 is a perspective view showing a structure of a lead wire power supply device of a fluorescent lamp according to a second embodiment of the present invention;

9 is a view illustrating a state before a power supply device and a lead wire of a fluorescent lamp are coupled according to the second embodiment of the present invention;

10 is a view showing a state after the power supply device and the lead wire of the fluorescent lamp are coupled according to the second embodiment of the present invention;

11 is a detailed view of a backlight device according to a third embodiment of the present invention;

12 is a perspective view showing one side cross-sectional structure of a backlight device according to a third embodiment of the present invention;

13 is a detailed view of a backlight device according to a fourth embodiment of the present invention.

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

10 fluorescent lamp 11: glass tube

12 internal electrode 13 lead wire

20: cover bottom 30: power connection device

31: first pressure unit 32: second pressure unit

33: third pressing section 34: lead section

35 support 40 substrate

50: guide plate 51: lamp guide

52,52 ': Lead wire guide 53: Guide wall

60: cover plate 61: first support protrusion

62: second support protrusion

The present invention relates to a backlight device, and more particularly, to a power connection device of a direct type backlight device for electrically connecting the lead wire of a fluorescent lamp.

Recently, as the information society develops, the demand for display devices is increasing in various forms. Accordingly, liquid crystal display (LCD), plasma display panel (PDP), electro luminescent display (ELD), and vacuum fluorescent display (VFD) Various flat panel display devices have been researched and developed.

Here, LCD, which is a liquid crystal display device, is used as a mobile flat panel display device due to its excellent image quality, light weight, thinness, and low power consumption, and is particularly used as a laptop, computer monitor, and television monitor.

However, LCDs do not emit light by themselves and require a separate external light source to realize high quality images. Therefore, the LCD structure further includes a backlight unit as a light source of the liquid crystal display panel in addition to the liquid crystal display panel, so that the backlight unit uniformly supplies a high brightness light source to the liquid crystal display panel, thereby realizing high quality images.

In general, a backlight of a liquid crystal display is classified into an edge-lighting and a direct-lighting backlight according to a method of disposing a light source.

Here, the side backlight is mainly used in liquid crystal display devices for thinning portable communication devices due to its relatively thin thickness, and the direct type backlight is a liquid crystal for high brightness large screens such as notebooks and TV monitors due to high light efficiency. It is mainly used for display devices. In particular, in the case of the direct type backlight, the use of the liquid crystal display device is increasing in size to several tens of inches or more.

Light sources used in these backlights include cylindrical fluorescent lamps such as Cold Cathode Fluorescent Lamps (CCFL), Hot Cathode Fluorescent Lamps (HCFL), and External Electrode Fluorescent Lamps (EEFL). Or various light sources such as LED (Light Emitting Diode) devices and EL (Electro Luminescence) devices.

Since the light sources have advantages and disadvantages according to the type of backlight, various light sources may be used depending on the backlight, but cold cathode fluorescent lamps are mainly used for direct-type backlights that require high brightness and increase in size.

1 is a view illustrating a structure of a cold cathode fluorescent lamp according to the related art, and FIG. 2 is a view showing a detailed structure in which a cold cathode fluorescent lamp is coupled to a direct backlight device.

As shown in FIG. 1, a typical cold cathode fluorescent lamp (hereinafter referred to as 'CCFL') has mercury (Hg), argon gas (Ar), and neon gas (Hg) inside a tube-shaped glass tube 11. An inert gas such as Ne) is filled in, and phosphors are formed on the inner wall of the glass tube 11, and both sides of the glass tube 11 form a structure in which internal electrodes 12 of an anode and a cathode are provided.

In this structure, when an electric field is applied to the internal electrode 12, electrons emitted from the cathode excite an inert gas to emit ultraviolet rays, and the ultraviolet rays are irradiated onto the applied phosphor to change into white visible light, thereby functioning as a lamp. do. In addition, the conventional CCFL has a structure in which a conductive electrical connection lead 13 is connected to the internal electrode 12 to protrude outward from both sides of the glass tube 11 to apply an electric field to the internal electrode from the outside.

 Meanwhile, in the direct backlight device using the CCFL, a coupling structure for applying power to the CCFL will be described in detail with reference to FIGS. 2 and 3.

CCFL 10 is coupled to the cover bottom 20 by the fixing means 14, both sides of the lamp is fixed, the conductive cable 15 is integrally connected to the fixing means 14, the conductive cable 15 One side of the connector 16 is provided. The connector 16 is coupled to the coupling means 18 of the inverter 17 to apply power to the CCFL.

In the direct backlight device having the above structure, as shown in FIG. 3, the conductive line 19 inside the conductive cable and the lead line 13 of the CCFL internal electrode are coupled by a process such as welding.

In this case, the manufacturing process of the backlight device becomes difficult, and the manufacturing cost increases due to many components, in particular, the conductive line 19 due to the flow of the conductive cable 15 connecting the CCFL 10 to the inverter 50. There is a high possibility that a problem occurs in the electrical connection between the lead wire 13. That is, when a problem occurs in the electrical connection of the CCFL (10) is a serious problem in the backlight device, not only difficult to replace the CCFL but also requires a large cost.

The present invention has been proposed to solve the above problems, in the direct type backlight device using a fluorescent lamp, the structure is simple, but can be easily fixed to the fluorescent lamp cover cover, and also the lead wire of the fluorescent lamp An object of the present invention is to provide a lead wire connection device of a fluorescent lamp that can be stably coupled and a backlight device using the same.

In order to achieve the above object, the power supply device of the present invention is a fluorescent lamp lead power supply device of a direct backlight device, which is a flat plate of metal, which is separated from the center and formed downward inclined toward both outsides. A second pressing portion extending from each central end of the first pressing portion and bent downward in a semicircular shape to the outside; A third pressurizing portion extending from the second pressurizing portion while being inclined outwardly, the end portion of which is rounded in a semicircular shape and protruded upward and connected horizontally; The first pressing portion and the second pressing portion is a hole formed in the center of the metal plate to facilitate the elastic deformation of the first pressing portion and the second pressing portion; A lead part extending horizontally to be in electrical contact with an outside at both ends of the first pressing part; And a support part which is vertically bent downward to support the power connection device at both centers of both end portions of the first pressing part. The lead wire of the fluorescent lamp is inserted while the upper side of the second pressing part is opened. The central portion of the first pressing portion is moved below the reference line of the elastic inflection point by pressurization, and the fluorescent lamp lead wire is mechanically crimped by mechanical crimping by the leaf springs in which the opened second pressing portion is the first pressing portions on both sides. And a lower portion of the fluorescent lamp lead wire is supported by the restoring force of the third pressing unit.

In the above-described configuration, the power connection device further includes an extension part which is bent downward from the first pressing part and is bent by an elastic force when the central portion of the first pressing part is moved below the reference line of the elastic inflection point. It is characterized in that it is configured to supplement the leaf spring function of the first pressing portion by adding an auxiliary pressing function by moving to.

In addition, the direct type backlight device of the present invention is a direct type backlight device in which a plurality of fluorescent lamps are arranged in the cover bottom, the fluorescent lamp formed by protruding lead wires for both sides of the glass tube for electrical connection; A first pressing part having a shape separated from and separated from both sides toward an outer side, extending from each central end of the first pressing part, and a second pressing part bent downward in a semicircular shape to the outside, and A third pressurizing part extending from the second pressurizing part to be inclined outwardly, the end portion of which is rounded in a semicircular shape and protruded upward and connected horizontally; the first pressurizing part and the second pressurizing part Holes formed in the center of the metal plate to facilitate elastic deformation of the first pressing portion and the second pressing portion, and both end portions of the first pressing portion A power connection device including a lead part extending horizontally to be in electrical contact with the outside, and a support part vertically bent downward to support the power connection device at both centers of both ends of the first pressing part; A circuit board fixed to support both ends of the power connection device and configured to connect the power connection device and a power supply unit, on which the power connection device is mounted; A guide plate for stably mounting the fluorescent lamp and the substrate; And a cover plate for supporting the fluorescent lamp and the power connection device.

In the above-described configuration, the guide plate prevents excessive movement of the lamp guide for seating the end of the fluorescent lamp, the lead wire guide for mounting the lead wire of the fluorescent lamp, and the third pressing part of the power connection device. The contact surface is formed for each, characterized in that the cover plate is formed with a first support protrusion for supporting the first pressing portion of the power connection device and a second support protrusion for supporting the end of the fluorescent lamp seated, respectively.

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

[First Embodiment]

4 is a perspective view showing the structure of a lead wire power connection device of the fluorescent lamp according to the first embodiment of the present invention.

Referring to FIG. 4, the power connection device 30 according to the first embodiment of the present invention has a metal flat shape, and the center of the first pressing part 31 and the first pressing part 31 which are inclined downward to the outside. It consists of a second pressing portion 32 formed at the end, the third pressing portion 33 is formed extending from the end of the second pressing portion 32, the outer end of the first pressing portion 31 The lead part 34 and the support part 35 are formed, respectively. In addition, each of the above components is formed on both sides in a form in which the first pressing portion 31 protrudes upward with respect to the center to form a power connection device.

Looking at this in more detail, the above-described first pressing portion 31 is formed so that the flat metal plate branching to both sides protrudes slightly from the center to form an inclined surface, the lead wire of the fluorescent lamp in the center before being combined with the fluorescent lamp A predetermined interval is formed to allow insertion of (13 in Fig. 1).

In addition, when the backlight device is formed, a lead part 34 for electrically contacting an externally supplied power source is horizontally extended at both ends of the first pressing part 31, and the first pressing part 31 is formed. In the center of both ends of the support portion 35 is bent downward to support the power connection device to the substrate 40 which will be described later. In this case, it is preferable that the fixing protrusion 36 protrudes outward from the end of the support part 35 to prevent the power connection device 30 from being easily separated from the substrate 40.

The second pressing part 32 is formed to extend from the center of the first pressing part, and is bent downward at each end of the center of the first pressing part, in which case the lead wire of the fluorescent lamp is inserted into contact with the second pressing part 32. While rounded in a semi-circular shape of bent downward is formed on both sides. In addition, the hole 37 is formed at the center of the second pressing portion 32 to facilitate deformation of the second pressing portion 32 composed of the rounded metal plate and to facilitate electrical contact with the fluorescent lamp lead wire 13. It is preferable that this be formed.

The third pressing part 33 is formed to extend outwardly inclined from the second pressing part 32, and after extending to a predetermined length, the third pressing part 33 is bent while being rounded inward again and rounded at both sides. The ends are connected in a straight line to form a unit.

The first pressing part 31 and the second pressing part 32 which are finally branched to both sides by the third pressing part 33 having such a shape are also integrally connected to each other, and the third pressing part 33 ), The metal plate-type power connector has elasticity.

5 and 6 are views showing a state in which the power connection device according to the first embodiment of the present invention is coupled to the lead wire of the fluorescent lamp, and FIG. 7 is a view showing a substrate to which the power connection device is coupled. The power connection device according to the first embodiment of the present invention is configured to be fixedly coupled to the substrate as shown.

Referring to the drawings, the power connection device 30 is coupled to the substrate 40, the electrical coupling of the fluorescent lamp lead 13 and the power connection device 30 is first shown in Figure 5 fluorescent lamp lead 13 ) Is inserted between the second pressing section where the first upper side is opened. In such a state, when a force is applied from the upper side to the lower side with respect to the center of the first pressing portion protruding upward, the second pressing portion 32 and the third pressing portion 33 are caused by the elasticity of the metal plate as shown in FIG. 6. ) Is inserted into the first groove 41 of the substrate 40, the first pressing portion 31 is lowered below the reference line (A). At this time, the third pressing portion 33 is in contact with the upper surface contact surface 54 of the guide plate 50 to prevent the third pressing portion 33 from being excessively pressed downwards to the fluorescent lamp 10 in the correct position. It can be fixed.

At this time, the fluorescent lamp lead wire 13 inserted into the second pressing part 32 is pressed by both sides by the second pressing part 32 to be fixed while making electrical contact. In addition, the lead portion 34 of the power connection device 30 is in contact with the metal electrode provided on the upper surface of the substrate, the support portion 35 is fitted into the second groove 42 of the substrate to contact the wall surface of the second groove The power connector is supported, and the fixing protrusion 36 is caught on the lower surface of the substrate 40 so that the power connector is not easily separated.

On the other hand, the power connection device 30 is fixedly coupled to the substrate 40 to form a backlight assembly. Referring to FIG. 7, the substrate 40 according to the first embodiment of the present invention has a groove 41 in which the second pressing part 32 and the third pressing part 33 of the power connection device are inserted. Is formed in, the groove 42 is formed on the outside into which the support portion 35 of the power connection device can be inserted. In addition, the upper surface of the outer groove 42 is formed to form a structure in which the conductive copper foil 43, which can be in contact with the lead portion 34 of the power connection device is integrally coupled.

Second Embodiment

8 is a perspective view illustrating a structure of a lead wire power supply device of a fluorescent lamp according to a second embodiment of the present invention, and FIGS. 9 and 10 are lead lines of a fluorescent lamp of the power supply device according to the second embodiment of the present invention. Figure is a view showing a state coupled with.

Referring to FIG. 8, in the power connection device 30 according to the second embodiment of the present invention, in the power connection device 30 according to the first embodiment, the first pressing part 31 inclined downward toward the outside. An extension portion 38 having an outer end portion of which is bent downwardly and curved is further formed to have a predetermined length, and at the end portion of the extension portion 38, the lead portion 34 and the support portion 35 as in the first embodiment are formed. Are each formed. In addition, the structure with respect to a 2nd press part and a 3rd press part is also the same structure as 1st Example.

In particular, the extension portion 38 in the second embodiment is bent while forming a curved surface with a predetermined curvature from the first pressing portion 31 to facilitate the elastic deformation of the first pressing portion 31, the extension portion 38 ) Supplements the function of the leaf spring as the first pressing part by adding an auxiliary pressing function by moving outward when an external force is applied to the first pressing part. In addition, a hole 37 is formed in the center of the first press part 31 and the second press part 31 to facilitate elastic deformation of the first press part and the second press part.

In the second embodiment of this structure, when the pressing force is applied from the upper side, as shown in FIG. 10, the first pressing unit 31 is lowered below the reference line A. In this case, the third pressing unit 33 is By contacting the upper surface 44 of the substrate 40, the fluorescent lamp 10 can be fixed in place.

Meanwhile, in the case of the power connection device 30 according to the second embodiment, as shown in FIGS. 9 and 10, the second press part 32 and the third press part 33 are inserted into the substrate 40. The first groove 41 is not formed.

Third Embodiment

11 and 12 are partial perspective views showing in detail a direct type backlight device according to a third embodiment of the present invention.

Referring to the drawings, the direct type backlight device 100 according to the third embodiment of the present invention includes a power connection device for contacting a plurality of fluorescent lamps 10 and lead wires of the fluorescent lamps in the cover bottom 20 ( 30), a substrate 40 for fixing the power connection device, a guide plate 50 for mounting the substrate, and a cover plate 60 for protecting the power connection portion of the fluorescent lamp.

Here, the cover bottom 20 and the fluorescent lamp 10 are configurations of a general direct type backlight device, and a detailed description thereof will be omitted. The configuration of the power connection device 30 and the substrate 40 is a configuration according to the first embodiment. Hereinafter, the guide plate 50 and the cover plate 60 will be described in detail.

The above-described guide plate 50 is to stably seat the substrate 40 to which the power connection device 30 is coupled to the inside of the cover bottom 20, and to support the fluorescent lamp 10. To this end, the guide plate 50 is formed with a lamp guide 51 for mounting the end of the fluorescent lamp and lead wire guides 52 and 52 'for mounting the lead wire of the fluorescent lamp, respectively. In addition, the guide wall 53 is formed to prevent foreign substances, which may be generated in the process of assembling the backlight assembly, from being introduced into the cover bottom 20. Here, the guides 51, 52, 52 ′ of the guide plate 50 and the second pressing part 32 of the power connection device 30 are positioned on a straight line with respect to the lead wire 13 of the fluorescent lamp.

The cover plate 60 is for supporting the connecting portion of the lead wire 13 and the power connecting device for supplying power to the fluorescent lamp, and is assembled on the upper side of the connecting portion to prevent the change of the connection condition due to external force. . That is, the lower end of the cover plate, the end of the fluorescent lamp, the lead wire, the power connection device, the substrate, the guide plate is located.

In the cover plate 60 of the backlight device according to the third embodiment of the present invention, the first supporting protrusion 61 is formed downward in a place where the first pressing part of the power connection device is located, and the lead wire 13 of the fluorescent lamp The power connection device 30 coupled and inserted into the first groove 41 of the substrate is configured to press-support the first pressing part 31 such that the power connection device 30 is not returned to the upper side by an external force. In addition, a second support protrusion 62 for supporting the lamp is formed so that the fluorescent lamp seated on the lamp guide 51 of the guide plate 50 is not separated.

11 and 12 illustrate the backlight device to which the power connection device and the substrate are applied according to the first embodiment of the present invention, the second device of the present invention is shown in FIG. The power connection device and the substrate according to the embodiment may be similarly applied. In this case, the substrate 40 is not provided with a groove 41 for inserting the second pressing portion 32 and the third pressing portion 33. Only the groove 42 into which the support part 35 is inserted is formed.

Although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above-described embodiments, and various changes may be made by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention. It may be changed and implemented.

As described above, the power connection device of the fluorescent lamp lead wire according to the present invention does not need a separate conductive cable to supply power to the internal electrode of the fluorescent lamp, and thus has a simple structure. It is simple and inexpensive, and there is no fear that the joining site is broken by being reliably coupled with the lead wire.

Claims (4)

In the fluorescent lamp lead wire power supply of the direct type backlight device, In the plate type of metal, A first pressing unit having a shape separated from the center and formed downward inclined toward both outer sides; Wow A second pressurizing portion extending from each central end of the first pressurizing portion, the second pressurizing portion being bent downward in a semicircular shape to the outside; A third pressurizing portion extending from the second pressurizing portion while being inclined outwardly, the end portion of which is rounded in a semicircular shape and protruded upward and connected horizontally; The first pressing portion and the second pressing portion is a hole formed in the center of the metal plate to facilitate the elastic deformation of the first pressing portion and the second pressing portion; A lead part extending horizontally to be in electrical contact with an outside at both ends of the first pressing part; And And a support part which is formed vertically bent downward to support the power connection device at the centers of both end portions of the first pressing part. The lead wire of the fluorescent lamp is inserted while the upper side of the second pressing part is opened, and the center part of the first pressing part is moved below the reference line of the elastic inflection point by pressing, so that the opened second pressing part is the first pressing part on both sides. The fluorescent lamp lead wire can be improved by mechanical crimping by a leaf spring, and the lower part of the fluorescent lamp lead wire is coupled by the restoring force of the third pressing part so as to be supported. Power connector. The method of claim 1, wherein the power connection device is further formed extending from the first pressure portion is bent downward curved, When the central portion of the first pressing portion is moved below the reference line of the elastic inflection point by moving outward by the elastic force to add an auxiliary pressing function, characterized in that configured to complement the leaf spring function of the first pressing portion Lead wire power connector of the lamp. In the direct type backlight device in which a plurality of fluorescent lamps are disposed in the cover bottom, A fluorescent lamp formed by protruding lead wires for electrical connection to both sides of the glass tube; and The plate is made of metal, separated from the center and extending downwardly toward both outer sides, extending from each central end of the first pressing portion, extending downward at each semicircle to form a rounded downward bending outward. A second pressing unit and a third pressing unit extending inclined outwardly from the second pressing unit, the end portions of which are rounded in a semicircle shape and protruded upwards and are connected horizontally; The pressurizing portion and the second pressurizing portion extend horizontally to be in electrical contact with the outside at both ends of the hole formed in the center of the metal plate to facilitate elastic deformation of the first pressurizing portion and the second pressurizing portion. Is formed by bending vertically downward to support the power connection device at the centers of both ends of the lead part and the first pressing part which are formed A power connection device composed of branches; Wow, A circuit board fixed to support both ends of the power connection device and configured to connect the power connection device and a power supply unit, on which the power connection device is mounted; A guide plate for stably mounting the fluorescent lamp and the substrate; And And a cover plate for supporting the fluorescent lamp and the power connection device. The guide plate of claim 3, wherein the guide plate for mounting the end of the fluorescent lamp, the lead wire guide for mounting the lead wire of the fluorescent lamp, and the third pressing unit of the power connection device are prevented from being excessively moved downward. A contact surface for each of which is formed, and the cover plate has a first support protrusion for supporting the first pressing part of the power connection device and a second support protrusion for supporting an end of the fluorescent lamp seated, respectively. Type backlight device.

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