KR100983588B1 - Liquid Crystal Display Device - Google Patents

Abstract

In order to more stably fix the inverter of the liquid crystal display device, the present invention provides a support main for accommodating the liquid crystal display panel and the backlight unit; A cover bottom provided below the support main; An inverter mounted on a rear surface of the cover bottom to convert a current supplied to the backlight unit; A plurality of inverter fixing devices detachably mounted to a bottom surface of the cover bottom and fixing the inverter; And it provides a liquid crystal display device comprising a gap adjusting member mounted between the fixing device and the inverter.

LCD, Inverter, Fixing Device, Spacing Member

Description

[0001] The present invention relates to a liquid crystal display device,

1 is an exploded perspective view of a liquid crystal display device

2 is a rear view of a liquid crystal display device according to the prior art.

3 is a side view of a liquid crystal display according to the prior art.

4 is a side view of the liquid crystal display according to the present invention.

5 is a perspective view showing a fixing device of the inverter according to the present invention.

6 is a view illustrating a rear surface of the liquid crystal display according to the present invention.

Description of the Related Art

20: top case 114: cover bottom

115: inverter fixing device 116: gap adjusting member

140: inverter

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a structure for stably fixing an inverter provided on the rear surface of the liquid crystal display device.                         

In general, a liquid crystal display device includes a liquid crystal display panel in which liquid crystal is injected between upper and lower glass substrates, a polarizing sheet attached to upper and lower surfaces of the liquid crystal display panel to polarize light, and a constant light to the liquid crystal display panel. It comprises a backlight having a light source and a light guide plate for supplying the. Here, the liquid crystal display panel is a device for displaying a desired image by switching the liquid crystal cells in accordance with an image signal input from the outside.

1 is a detailed exploded view of a liquid crystal display device having a backlight structure of a direct type.

As shown in FIG. 1, the liquid crystal display is divided into a backlight unit 12 and a liquid crystal display panel 11, and the backlight unit 12 and the liquid crystal display panel 11 include a support main 13 and a top. It is supported by the case 20.

A reflector plate (not shown), a plurality of lamps 12d, a diffusion plate 12a, and a plurality of diffusion sheets 12b and 12c are mounted as a backlight inside the support main 13 made of a plastic material.

A liquid crystal display panel 11 is mounted above the backlight unit 12, and a top case 20 made of metal is covered with the upper side of the liquid crystal display panel 11 to be fastened and fixed to the support main 13. do. In addition, a cover bottom 14 is generally provided on the rear surface of the support main 13, which is a support frame of the liquid crystal display, to reinforce the lower support structure. Upper and lower polarizing sheets are attached to upper and lower portions of the liquid crystal display panel 11, respectively.                         

Here, since the liquid crystal display panel 11 itself does not emit light, light should be uniformly incident from the lower surface of the screen display area of the liquid crystal display panel 11. To this end, the support main 13 is provided with a lamp 12d that emits light. The lamp 12d uses a CCFL (Cold Cathod Fluorescent Lamp) and is connected to the lamp 12d. Is on the back of the liquid crystal display.

Since an alternating current is used as the electric energy for driving the lamps 12d, an inverter (not shown) is installed on the back of the liquid crystal display to obtain a desired current. The inverter converts electrical energy of direct current supplied from an external power source into alternating current. Therefore, the wires connected to the lamps must be connected to the inverter and the lamps are driven to emit light by the electric energy of the alternating current converted from the inverter.

2 is a diagram illustrating a rear surface of a liquid crystal display panel equipped with a cover bottom according to the related art.

As shown in FIG. 2, the rear surface of the liquid crystal display device is covered with a cover bottom 14 made of a metal material, and the cover bottom 14 has a bending portion 15 for fixing the inverter. The bending part 15 is formed to protrude downward by a die processing for bending after the cover bottom 14 is pierced.

In this case, since the inverter has a rectangular shape, the bending part 15 is formed at a plurality of locations along the edge of the inverter.                         

The inverter is fixed to the inside of the protruding bending portions 15, and a screw fastening hole 15a is formed in the bending portion 15. Therefore, the inverter is fixed by screwing through the hole 15a.

3 is a view showing a heat radiation structure of the inverter according to the prior art.

As shown in FIG. 3, a heat dissipation pad 41 is inserted between the inverter 40 and the cover bottom 14. Since the inverter 40 generates heat while converting current, the inverter 40 functions as one heat source. When the inverter 40 is in direct contact with the cover bottom 14, heat generated in the inverter 40 is transferred to the liquid crystal display panel, causing malfunction. Therefore, the heat dissipation pad 41 is inserted between the cover bottom 14 and the inverter 40 to prevent heat generated from the inverter 40 from being transferred upward.

However, the fixing structure of the inverter according to the prior art as described above has the following problems.

First, in the prior art, since the bending of the cover bottom itself is performed, the bending parts are formed. Therefore, when the size of the inverter is changed, there is a problem of manufacturing a new mold to change the position of the bending part correspondingly.

Second, the heat dissipation pad used in the prior art has a problem that the heat dissipation function can no longer be performed since the heat dissipation pad itself is heated to a predetermined temperature or more after a predetermined time.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid crystal display device having a structure for more stably fixing the inverter.

In order to achieve the above object, the present invention provides a support main for accommodating a liquid crystal display panel and a backlight unit; A cover bottom provided below the support main; An inverter mounted on a rear surface of the cover bottom to convert a current supplied to the backlight unit; A plurality of fixing devices detachably mounted on a lower surface of the cover bottom and fixing the inverter; And it provides a liquid crystal display device comprising a gap adjusting member mounted between the fixing device and the inverter.

The liquid crystal display according to the present invention having the above characteristics will be described in more detail with reference to the accompanying drawings.

4 is a side view of a liquid crystal display device having an inverter fixing device according to the present invention.

As shown in FIG. 4, the LCD according to the present invention includes a support main (13 in FIG. 1), a cover bottom 114, an inverter 140, and a fixing device 115 for fixing the inverter 140. It is made to include. Here, the liquid crystal display panel 11 of FIG. 1 and the backlight unit 12 of FIG. 1 are accommodated inside the support main. The liquid crystal display panel displays a desired image by switching the liquid crystal cells provided therein. In addition, the backlight unit provides uniform light to the bottom surface of the liquid crystal display panel.

To this end, the backlight unit comprises various sheets and lamps. The top case 20 is mounted on the upper side of the support main, and the cover bottom 115 is mounted on the lower side. In addition, an inverter 140 is mounted on a bottom surface of the cover bottom 115. The inverter 140 converts the current supplied to the backlight unit into a desired state.

Meanwhile, in the liquid crystal display according to the present invention, a plurality of fixing devices 115 for fixing the inverter 140 are detachably mounted on the bottom surface of the cover bottom 114. Accordingly, the inverter 140 is stably fixed to the rear surface of the liquid crystal display by being fastened to the fixing device 115.

Here, the fixing device 115 is manufactured using a screw on the rear surface of the cover bottom 114. That is, fastening holes are formed in the fixing device 115 and the cover bottom 114, respectively, to fix the fixing device 115 by fastening a screw to the fastening hole.

In addition, the fixing device 115 may be fastened using a hook without being limited to the fastening method as described above. That is, the fixing device 115 may be fixed by inserting and hooking a hook formed on one surface of the fixing device 115 into a hole formed in the cover bottom 114.

Since the fixing device 115 is detachably configured, even when the size of the inverter 140 is changed or the number of inverters is large, the fixing device 115 can be flexibly responded. For example, when the size of the inverter 140 is changed, it is easy to move the fixing device 115 to a position corresponding to the size of the inverter 140 to be fastened. Therefore, in the related art, when the size of the inverter 140 is changed, the problem of having to manufacture the mold again is solved.                     

5 is a perspective view showing a fixing device according to the present invention.

4 and 5, the cross section of the fixing device 115 is formed in a '-' shape. Here, the bottom surface of the fixing device 115 is fastened and fixed to the bottom surface of the cover bottom 114, the vertically protruding portion is in close contact with the side of the inverter 140 is fastened.

In addition, the gap adjusting member 116 is installed on the bottom surface of the fixing device 115, the inverter 140 is mounted above the gap adjusting member 116. That is, the gap adjusting member 116 is mounted between the fixing device 115 and the inverter 140.

Thus, a space is formed between the inverter 140 and the cover bottom 114. Since the space forms an air layer having very little heat transfer, heat generated from the inverter 140 is prevented from being transferred to the liquid crystal display panel.

That is, when the air layer is heated by the heat generated by the inverter 140, the air heated by natural convection is discharged to the outside to form an effective heat dissipation structure. Therefore, even when the air layer is continuously heated for a predetermined time or more, heat is prevented from being transferred to the cover bottom 114 above a predetermined temperature.

The thicker the air layer, the more heat transfer is prevented. However, in order to reduce the thickness of the liquid crystal display, the thickness of the air layer is preferably minimized. Therefore, it is desirable to minimize the thickness of the air layer within a range where heat transfer is prevented above a certain level. Here, since the thickness of the air layer corresponds to the thickness of the gap adjusting member 116, the thickness of the gap adjusting member 116 is adjusted to meet the above conditions.

The gap adjusting member 116 has a certain strength, and is made of a heat resistant strong material. Here, the gap adjusting member 116 is preferably made of Teflon having a certain thickness. Since the Teflon satisfies the above conditions and has low thermal conductivity, the heat generated from the inverter 140 is prevented from being transferred to the cover bottom 114 as much as possible.

On the other hand, a plurality of fixing devices 115 are provided along the edge of the inverter 140 to be mounted on the rear surface of the cover bottom 114.

6 is a diagram illustrating a rear surface of the liquid crystal display according to the present invention.

As shown in FIG. 6, the fixing device 140 is detachably mounted along both sides of the inverter 140 at the rear surface of the cover bottom 114. As shown, it is preferable that the fixing device 115 is mounted at two or more places on each side.

In addition, it will be understood from the foregoing description that the present invention can be implemented by changing the position and the number of the fixing device according to the number of inverters or the size of the inverter to be installed on the rear surface of the cover bottom.

As described above, the liquid crystal display according to the present invention can obtain the following effects.

First, in the liquid crystal display device according to the present invention, since the fixing device for fixing the inverter is detachably provided, even when the size of the inverter is changed, it is possible to flexibly cope without having to manufacture a mold or the like again.

Second, according to the present invention, an air layer is formed in a space between the inverter and the cover bottom, and even though the air layer is heated by the inverter, it can be more effectively radiated by natural convection.

Claims (8)

A support main housing accommodating a liquid crystal display panel and a backlight unit; A cover bottom provided below the support main; An inverter mounted on a rear surface of the cover bottom to convert a current supplied to the backlight unit; A plurality of fixing devices detachably mounted on a lower surface of the cover bottom and fixing the inverter; And And a gap adjusting member mounted between the fixing device and the inverter. The method of claim 1, A cross section of the fixing device is characterized in that the liquid crystal display device consisting of a 'b' shape. The method of claim 2, One side of the fixing device is fastened to the bottom of the cover is fixed, the other side of the liquid crystal display device characterized in that the fastening. delete The method of claim 1, And the gap adjusting member is made of Teflon having a predetermined thickness. The method of claim 1, And the fixing device is fastened to the rear surface of the cover bottom by using a screw. The method of claim 1, And the fixing device is fastened to a rear surface of the cover bottom by using a hook. The method of claim 1, And the fixing device and the inverter are fastened by using a screw.

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