KR100997638B1 - Device for connecting a led board and chassis and back light utiling the same - Google Patents

Abstract

PURPOSE: A combination device of an LED module substrate and a chassis and a backlight using the same are provided to enhance the combination force of a frame or the chassis and the LEN module substrate and to enhance the combination force of the chassis and LED module substrate, thereby enhancing reliability according to the combination. CONSTITUTION: A plurality of LED is installed in an LED module substrate(40). A combination method combines the LED module substrate and a chassis or a frame. A light guiding unit(50) examines the light examined from an LED of the LED module substrate to the liquid display panel side. The combination method continuously or discontinuously has a combination member in longitudinal direction to rear surface of the LED module substrate.

Description

Device for connecting a LED board and chassis and back light utiling the same}

The present invention relates to a backlight, and more particularly, to a coupling device of an LED module substrate and a chassis having an improved coupling structure of an LED module substrate and a chassis, and a backlight using the same.

Due to the rapidly developing semiconductor technology, the demand for flat panel display devices having improved performances such as image resolution, brightness, contrast, etc. is exploding due to the compactness and light weight of flat panel display devices.

Among these flat panel display devices, liquid crystal display (LCD), plasma display, organic EL display, and LED display, which have recently been in the spotlight, have advantages such as flat panel display and low power consumption, and thus, have a conventional CRT (cathode cathode). It is attracting attention as an alternative means to overcome the disadvantages of the ray tube.

Among the flat panel display devices described above, the liquid crystal display device does not form an image by itself and emits light, but receives light from the outside to form an image. Therefore, the LCD cannot display an image in a dark place. In order to solve such a problem, a backlight is provided on the rear surface of the liquid crystal display so that the image can be viewed even in a dark place by irradiating light.

The backlight for irradiating light to the liquid crystal display includes an edge method for irradiating light from the side of the panel and a direct method for irradiating light from the rear surface.

One example of such a backlight is disclosed in Japanese Laid-Open Patent Publication No. 60-216435. In the surface light source device, partition walls are alternately provided inside a container having a sealed space to form a meandering discharge space, and electrodes are provided at both ends of the discharge space. Phosphor layers are formed above and below the discharge space.

 In the conventional surface light source device configured as described above, when a predetermined potential is applied to the electrode, a glow discharge occurs in the discharge space, and ultraviolet light of the generated light excites the phosphor layer to emit light from the phosphor layer.

However, such a backlight cannot emit uniform luminance due to weak light emission at the edge of the discharge space, has a problem of requiring a high voltage for discharge and easily deteriorating the electrode.

The study of the backlight using light emitting diode modules (hereinafter, abbreviated as LED modules) that can reduce the above points and improve the white balance characteristics has been actively conducted.

The backlight using the LED module has an advantage that the liquid crystal display device can be thinned, but the LED module is formed of a thin plate, and since a lot of heat is generated during light emission, installation and light emission are not easy.

The fixing of the LED module and the supporting frame or the chassis used as the backlight is performed by a set screw. However, the combination using the set screw is not good bond, it takes a lot of labor and can not improve the productivity. In particular, it is difficult to form a tab for coupling the set screw to the thin plate.

In addition, in the case of the LED module, since a relatively large amount of heat is generated as described above from the LED, a separate heat dissipation means is required for cooling the heat dissipation means. .

On the other hand, Utility Model Registration No. 2000-07455 discloses a main board coupling device of a television, and Patent Publication No. 2005-003250 discloses a coupling module system of a liquid crystal display device. The main substrate and the peripheral substrate coupling device is disclosed.

Since the coupling devices described above have a structure in which a hook is simply coupled to the chassis, there is a problem in that the fixing force of the circuit board is relatively lowered and the play is generated between each other. Such a gap has a problem that the light source is shaken when used as a backlight of the liquid crystal display device using the LED module, which is the main cause of deterioration of the image quality of the liquid crystal display device.

The present invention can increase the coupling force between the LED module substrate and the frame or chassis in order to solve the above problems, and the coupling device of the LED module substrate and the chassis that can be fixed to the chassis without shaking the LED module substrate and the same The purpose is to provide a used backlight.

Another object of the present invention is to provide a backlight using a combination device of an LED module substrate and a chassis that can improve the image quality by irradiating uniform light from the side or the back of the liquid crystal module.

In order to achieve the above object, a coupling device of an LED module substrate and a chassis of the present invention includes an LED module substrate on which light emitting diodes are installed in a predetermined pattern, and a frame or a chassis coupled to the LED module substrate by a coupling means.

The coupling means is a continuous or discontinuous coupling member is formed in the longitudinal direction on the back of the LED module substrate, characterized in that the coupling groove is coupled to the coupling member is formed in the frame or chassis to which the LED module substrate is coupled. do.

In the present invention, the coupling member has a protrusion protruding from the rear surface of the LED module substrate, a coupling protrusion is formed on at least one side of the protrusion, the at least one inner surface of the coupling groove to prevent separation of the coupling protrusion Grooves are formed.

The coupling member to be coupled to each other, and the cross section of the coupling groove may be formed in one of dovetail truncated triangle, circle, tee shape, rhombus shape, trapezoidal shape. Although the coupling member is formed on the LED module substrate and the coupling groove is formed on the frame or the chassis, the present invention is not limited thereto. The coupling member may be formed on the LED module substrate or the chassis.

Alternatively, a backlight using a combination device of an LED module substrate and a chassis for achieving the above object is coupled to a frame or chassis for supporting the liquid crystal display panel, and coupled to the frame or chassis by light emitting means to irradiate light to the liquid crystal display panel. An LED module substrate having a plurality of LEDs installed therein, Coupling means for coupling the LED module substrate to the chassis or frame, and a light guide plate unit for irradiating light emitted from the LEDs of the LED module substrate toward the liquid crystal display panel. Equipped,

The coupling means has a coupling member formed continuously or discontinuously in the longitudinal direction on the back surface of the LED module substrate, characterized in that the coupling groove is coupled to the coupling member is formed in the frame or chassis to which the LED module substrate is coupled. It is done.

In the present invention, the chassis has a support partition formed on a side corresponding to the edge portion of the liquid crystal display panel, the coupling groove having a cross-sectional dovetail shape in the longitudinal direction on the inner surface of the support partition corresponding to the edge portion of the liquid crystal display panel. Is provided, a coupling member corresponding to the coupling groove is formed on the back of the LED module substrate, the LED module substrate coupled to the support partition is moved to prevent the coupling member is separated from the coupling groove by coupling the coupling member. It is provided with a stopper.

The chassis is provided with an LED module support portion on the side corresponding to the rear surface of the liquid crystal display panel, a coupling member having a cross-sectional dovetail shape continuously or discontinuously in the longitudinal direction of the support portion, and the rear surface of the LED module substrate A coupling groove corresponding to the coupling protrusion is formed, and a stopper is provided on at least one side of the chassis or the LED module substrate to prevent the coupling of the LED module substrate and the support from being separated from the coupling groove by moving the LED module substrate.

Backlight using the coupling device of the LED module substrate and the chassis according to the present invention can increase the coupling force between the frame or the chassis and the LED module substrate to increase the coupling force between the chassis and the LED module substrate and increase the reliability of the combination, the LED module for the chassis It is possible to fundamentally prevent the shaking of the substrate.

In addition, productivity can be improved by reducing the labor associated with the combination of the LED module board and the chassis.

The backlight using the combination of the LED module substrate and the chassis according to the present invention is disclosed a coupling structure for coupling the LED module substrate formed in a predetermined pattern to a frame or a chassis, in particular a thin metal plate and a thin plate LED 1 and 2 illustrate an backlight including a frame molded to support a liquid crystal display panel.

Referring to the drawings, the backlight 10 using the LED module substrate and the coupling device of the chassis is provided by a frame or chassis 20 for supporting the liquid crystal display panel 100 and coupling means 30 to the frame or chassis. The LED module substrate 40 coupled to irradiate light to the liquid crystal display panel, and a light guide plate unit for irradiating light emitted from the LEDs of the LED module substrate 40 to the liquid crystal display panel. 50).

The backlight according to the present invention configured as described above will be described in more detail for each component as follows.

The LED module substrate 40 is a plurality of LEDs 42 are installed in a predetermined pattern on the substrate 41 in a predetermined pattern, the substrate 41 may be made of a methyl substrate. The substrate 41 may be formed on a strip having a predetermined width. However, the substrate 41 is not limited thereto, and any substrate can be used as long as it can irradiate the liquid crystal display panel 100 with light from an edge or a back surface.

The substrate 41 may be formed of a metal plate. An insulating layer may be formed on an upper surface of the metal substrate using the metal plate, and an electrode line for supplying power to the LEDs may be formed in a predetermined pattern on the insulating layer. And components for driving the LED 42 may be installed on the electrode line.

The frame or chassis 20 supports the liquid crystal display panel and supports the LED module substrate 40. The frame or chassis 20 surrounds the side surface of the liquid crystal display panel 100 to cover the body 21 and the edge of the body. The support partition 22 is formed continuously or discontinuously in the. The support bulkhead 22 of the main body 21 may be formed by combining a plurality of members, that is, a plate-like member constituting the main body and a member constituting the support bulkhead, or may be manufactured by aluminum die casting.

The main body 21 or the support partition 22 of the chassis 20 may further include heat dissipation means 60 for dissipating heat generated from the LEDs.

The coupling means 30 is for coupling the LED module substrate 40 to the chassis 20, the coupling member 31 is formed continuously or discontinuously in the longitudinal direction on the back surface of the LED module substrate 100 The coupling groove 35 coupled to the coupling member 31 is formed in the support partition wall 22 of the frame or chassis 20 to which the LED module substrate 100 is coupled. Herein, the coupling member 31 may be formed in the support partition wall 22 of the chassis 20, and the coupling groove 35 may be formed in the LED module substrate 40.

The coupling member 31 of the coupling means 30 has a protrusion 31 protruding from the bowel of the substrate and a coupling protrusion 33 formed on at least one side of the protrusion 32, and the coupling groove 35. At least one side of the inner surface of the groove 36 to prevent the separation of the coupling protrusion 33 is formed. The cross-section of the coupling member 31 and the coupling groove 35 coupled to each other may be formed in one of a dovetail truncated triangle, a circle, a tee, a rhombus, and a trapezoid as shown in FIGS. 3 to 8. have. Although the coupling member 31 is formed on the LED module substrate and the coupling groove is formed on the frame or the chassis, the coupling member 31 is not limited thereto and the coupling member may be formed on the substrate or the chassis.

On the other hand, when the LED module substrate 40 is made of a thin plate coupling member 31 may be formed by a lancing process as shown in FIGS. 4, 5 and 7. That is, except by punching the base of the LED module substrate or the support bulkhead 22 may be formed by bending it in one side, that is, the coupling direction.

In addition, as shown in FIGS. 11 and 12, the coupling member 80 may be separately manufactured and coupled to the chassis. In this case, the coupling member 80 forms a through hole 81 in the chassis and is separately manufactured. The base of the coupling member 80 may be coupled to the chassis by being pressed or coated or welded. The coupling member is manufactured separately, but the configuration is the same as the above-described embodiment.

When the coupling groove 35 is discontinuously formed, the inlet 37 into which the coupling member is inserted is relatively large so that the coupling protrusion 33 of the coupling member 31 can be inserted therein.

In addition, the at least one side of the support bulkhead 22 or the LED module substrate 40 has the LED module substrate 40 relatively moved in a state where the support bulkhead 22 and the LED module substrate 41 are coupled to each other to engage the coupling member 31. ) Is formed a stopper (38) to prevent separation from the coupling groove (35).

The heat dissipation means 60 is for dissipating heat generated from the LEDs. The heat dissipation fins 61 are formed by the LED module substrate 40 or the support partition wall 22. 9, as shown in FIG. 9, the LED module substrate 40 or the chassis 20 may be integrally formed, or the LED module substrate 40 and the chassis may be lancing processed. In addition, the heat dissipation means may be formed in the channel-shaped air flow passage 62 in the longitudinal direction in the guide partition or chassis (see Fig. 10).

The channel-shaped airflow passage 62 may maximize the cooling effect by smoothly flowing the airflow by the chimney effect.

On the other hand, the liquid crystal display panel 100 is coupled to each other to form an injection space in which the liquid crystal is injected, the electrode and the alignment layer are formed on the opposite sides of the glass substrate, respectively, between the liquid crystal is injected Has a configuration. And a color filter layer may be further provided to implement a color image.

The light guide plate unit 50 may irradiate light emitted from the LEDs of the LED module substrate 40 to the rear side of the liquid crystal display panel 100. 51 and the diffusion plate 52 coupled to the light guide plate 51. In addition, a separate scattering pattern for scattering light may be formed on a side surface corresponding to the LED of the LED module substrate.

FIG. 13 shows another embodiment of a coupling device of an LED module substrate and a chassis and a backlight using the same according to the present invention. The same reference numerals as the above embodiment indicate the same components.

Referring to the drawings, the backlight according to the present invention supports a liquid crystal display panel 100 in a direct method of irradiating light from the back of the liquid crystal display panel 100 and a frame for supporting the LED module substrate 40 or The chassis 70 is provided with a support 71 for coupling the LED module substrate 40 corresponding to the rear surface of the liquid crystal display panel 100 by the coupling means 30.

The support part 70 may be formed of strip members spaced apart from each other by a predetermined distance, but is not limited thereto. The support part 70 may be formed in a plate shape by aluminum die casting.

And the coupling means 30 for coupling the support portion 71 and the LED module substrate 40 has a coupling groove 31 is formed in the LED module substrate 40, the coupling protrusion 35 is formed in the support portion 71 Is formed. One side of the support portion 71 is provided with a stopper 37 for preventing the movement of the LED module substrate 40 to prevent the separation of the coupling protrusion 35 and the coupling groove 31 is substantially the same as the embodiment described above. Since it is the same, it will not be described again.

Coupling device of the LED module substrate and the chassis of the present invention configured as described above and the backlight using the same is inserted into the coupling groove 31 formed in the support partition wall 22 is inserted into the coupling groove 35 formed on the LED module substrate 40 The chassis 20 and the LED module substrate 40 are coupled to each other by allowing the coupling protrusion 33 of the coupling member 31 to be coupled to the recess 36 of the coupling groove 35. The stopper is used to fix the coupling position of the LED module substrate 40.

As described above, the combination of the chassis and the LED module substrate can be easily combined by the combination thereof, thereby improving productivity, and preventing the LED module substrate from being shaken with respect to the chassis 20. Since the LED substrate module is provided with a heat sink, the heat generated from the LED can be easily cooled, thereby preventing the LED from deteriorating.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The present invention is a combination of the LED module substrate and the chassis and the backlight using the same can be applied to the backlight of the billboard as well as various LED image display device.

1 is a perspective view showing a backlight using a coupling device of the substrate and the chassis of the LED module according to the present invention,

Figure 2 is an exploded perspective view showing a coupling device of the substrate and the chassis of the LED module,

3 is a cross-sectional view showing a state in which the chassis and the LED module substrate is coupled,

Figure 4 is an exploded perspective view showing another embodiment of the coupling means according to the present invention,

5 is a cross-sectional view of the coupling means shown in FIG.

6 and 7 are a perspective view showing another embodiment of the coupling means according to the present invention,

8 to 10 is a perspective view showing a heat dissipation means according to the present invention,

11 and 12 is an exploded perspective view showing another embodiment of the coupling means,

Figure 13 is a perspective view showing another embodiment of the backlight using a coupling device of the substrate and the chassis of the LED module according to the present invention.

Claims (2)

Frame or chassis for supporting the liquid crystal display panel, LED module substrate is coupled to the frame or chassis by a coupling means for irradiating light to the liquid crystal display panel, a plurality of LED is installed, the LED module substrate and the chassis Or coupling means for coupling a frame, and a light guide plate unit for irradiating light emitted from the LED of the LED module substrate to a liquid crystal display panel. The coupling means is a coupling member is formed continuously or discontinuously in the longitudinal direction on the back of the LED module substrate, characterized in that the coupling groove is coupled to the coupling member is formed in the frame or chassis to which the LED module substrate is coupled. Backlight using a combination of LED module board and chassis. The method of claim 1, The chassis has a support partition formed on a side corresponding to an edge of the LCD panel, a coupling groove having a cross-sectional dovetail shape in a longitudinal direction is provided on an inner surface of the support partition corresponding to an edge of the LCD panel. A stopper is formed on the back surface of the LED module substrate to correspond to the coupling groove, and the stopper prevents the coupling member from being separated from the coupling groove in a state in which the coupling member of the LED module substrate is coupled to the coupling groove formed in the support partition wall. Backlight using a coupling device of the LED module substrate and the chassis comprising a.

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