KR100669367B1 - Plasma display device without color band appearance - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device which eliminates the color stripe phenomenon shown in a plasma display panel. To this end, the plasma display apparatus of the present invention includes two plasma display panels, a chassis base disposed substantially parallel to the plasma display panel, and interposed between the plasma display panel and the chassis base to closely contact the plasma display panel and the chassis base. The above-described thermal conductive members and a buffer member attached between the plasma display panel and the chassis base along the outermost portion of the thermal conductive member, wherein the thermal conductive members are disposed to directly face neighboring sides. Through the present invention, color stripe phenomenon on the plasma display panel screen can be eliminated while maintaining the adhesion between the plasma display panel and the chassis base.

Plasma Display Panels, Color Strips, Spacing, Thermal Conduction Members

Description

Plasma display without color stripe phenomenon {PLASMA DISPLAY DEVICE WITHOUT COLOR BAND APPEARANCE}

1 is an exploded perspective view of a plasma display device according to an embodiment of the present invention.

2 is a rear view of the plasma display panel according to the first embodiment of the present invention.

3 is a rear view of the plasma display panel according to the second embodiment of the present invention.

4 is a rear view of the plasma display panel according to the third embodiment of the present invention.

5 is a rear view of the plasma display panel according to the experimental example of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device in which a color stripe phenomenon shown in a plasma display panel is eliminated.

As is known, the plasma display apparatus is an apparatus for displaying an image on a plasma display panel (PDP) using plasma generated by gas discharge. Therefore, a large amount of heat is basically generated in the PDP due to the high temperature discharge gas.

Furthermore, if the plasma display device has the above basic conditions and the discharge degree is increased to improve the brightness, the heat generated from the PDP is increased. Therefore, in the plasma display device, it is desirable to discharge the heat efficiently. It is important for the operation.

For this reason, in the conventional plasma display apparatus, the PDP is generally attached to a chassis base made of a material having excellent thermal conductivity, and a heat dissipation sheet (or heat conductive sheet) is interposed between the PDP and the chassis base to generate the PDP. Heat is conducted through the heat dissipation sheet and chassis base so that it can be released out of the device. Here, the chassis base is usually manufactured by die casting or pressing using a metal material such as aluminum, and the heat dissipation sheet is provided with acrylic resin or silicone resin.

Various attempts have been made to improve the heat dissipation efficiency of such a heat dissipation sheet. Typically, a heat dissipation sheet is inserted into an area enclosed by a buffer material and a buffer material such as a double-sided tape is attached around the panel. In particular, as the size of PDS is too large, as the size of PDP becomes too large, the adhesive force is reduced and the heat conduction function is degraded. Doing. In this case, a cushioning material is attached to the PDP and the chassis base in a space where the heat dissipation sheets are separated from each other.

However, in this case, since the thermal conductivity between the cushioning material interposed between the heat dissipation sheet and the heat dissipation sheet located on both sides is different from each other, there is a problem in that a luminance difference occurs due to different thermal conductivity, and different shades appear on the PDP screen corresponding to the portion where the buffer is attached. . This phenomenon is called a color stripe phenomenon.

In order to solve the problems as described above, the present invention provides a better image by eliminating the color stripe phenomenon appearing on the PDP screen by separating the buffer material and the heat conductive member by a predetermined distance.

Plasma display device of the present invention for achieving the above object, the plasma display panel, the chassis base disposed substantially parallel to the plasma display panel, the plasma display panel and the chassis base interposed between the plasma display panel and the chassis base Two or more thermally conductive members in close contact with each other, and a buffer member attached between the plasma display panel and the chassis base along the outermost portion of the thermally conductive member, wherein the thermally conductive members are disposed to directly face neighboring sides. .

Here, it is preferable that the heat conductive member and the buffer material are spaced apart from each other.

In addition, when there are two or more thermally conductive members, at least one or more of the intervals between the thermally conductive members may be 0 mm to 5 mm, more preferably 3 mm or less.

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

1 is an exploded perspective view showing a plasma display device according to an embodiment of the present invention.

As shown in FIG. 1, the plasma display apparatus 10 according to the present exemplary embodiment basically includes a plasma display panel (hereinafter, referred to as a 'PDP') 12 and a chassis base 16. The PDP 12 is mounted on one side of the chassis base 16, and the circuit elements 18 for driving the PDP 12 are mounted on the other side. The chassis base 16 is disposed substantially parallel to the PDP 12, and a thermally conductive member 14 is interposed therebetween so as to be in close contact with the chassis base 16 and the PDP 12 from the PDP 12. Serves to release and dissipate the generated heat. In addition, a cushioning material 20 is attached to attach the PDP 12 and the chassis base 16 to each other.

The front cover (not shown) is located outside the PDP 12 and the rear cover (not shown) is located outside the chassis base 16, and these are combined to complete the plasma display device set.

In an embodiment of the present invention, one or more thermally conductive members 14 are disposed between the PDP 12 and the chassis base 16 and attach the cushioning material 20 along its outermost portion. Here, the outermost part means an edge that surrounds the assembly part when one or more heat conductive members 14 are gathered, and excludes a space between the heat conductive members 14. As shown in FIG. 1, in the embodiment of the present invention, the shock absorbing material 20 is heat-conducted by attaching the shock absorbing material 20 only to the outermost part without attaching the shock absorbing material 20 between the heat conductive members 14. The color band phenomenon caused by adhesion between the members 14 is eliminated. Therefore, two or more thermally conductive members 14 are included, and the neighboring sides of the thermally conductive members 14 are disposed facing each other without directly interposing the buffer member 14 therebetween. In the embodiment of the present invention, in particular, since the cushioning material 20 is not attached between the thermally conductive members 14, in order to solve the problem that the adhesion between the PDP 12 and the chassis base 16 is lowered, the shock absorbing material 20 and the thermally conductive member are solved. (14) was intended to be kept at a predetermined distance. This will be described in more detail below.

FIG. 2 is a plasma display device according to a first embodiment of the present invention, and shows a state in which a heat conductive member and a buffer member are attached to a rear surface of a PDP.

As shown in FIG. 2, the plasma display device of the present invention attaches a thermally conductive member 14 to the center of the rear surface of the PDP 12, and attaches a cushioning material 20 to the outermost portion of the PDP 12 to provide a chassis base (not shown). Close contact with. The thermally conductive member 14 is selected from the group consisting of graphite, copper, aluminum, gold, silver, bronze, iron and zinc. It is made of at least one material, the cushioning material 20 is a double-sided tape, such as a synthetic resin material to mitigate the external impact while closely contacting the PDP 12 and the chassis base 16.

In the first embodiment of the present invention, a plurality of heat conductive members 14 in the form of rectangular sheets are used. 2 shows an example using three thermally conductive members 14, but this is merely to illustrate the present invention, and the present invention is not limited thereto, and thus, multiple thermally conductive members may be used depending on the size of the PDP.

In addition, in the first embodiment of the present invention, the intervals d ₁₁ and d ₁₂ between the thermally conductive members 14 and the intervals d ₂₁ , d ₂₂ , d ₂₃ , d between the thermally conductive members 14 and the cushioning materials 20. By maintaining at least one of the ₂₄ ) at a certain distance, the color band phenomenon does not appear in the PDP while maintaining sufficient adhesion even without providing a buffer material between the heat conductive members 14.

3 is a plasma display device according to a second embodiment of the present invention, and shows a state in which a heat conductive member and a buffer material are attached to the rear surface of the plasma display panel. In the plasma display stationary apparatus according to the second embodiment of the present invention, two thermally conductive members 14 are used. As shown in FIG. 3, in the second embodiment of the present invention, an interval d ₁₃ between the thermally conductive members 14 and an interval d ₂₅ , d ₂₆ , d between the thermally conductive member 14 and the buffer member 20 are shown. ₂₇ , d ₂₈ ) by maintaining a certain distance, the color band phenomenon does not appear in the PDP while maintaining a sufficient adhesion even without providing a cushioning material between the heat conductive members (14). Since the plasma display device according to the second embodiment of the present invention is the same except for the number of the plasma display device and the heat conductive member 14 according to the first embodiment of the present invention, a detailed description thereof will be omitted.

FIG. 4 is a plasma display device according to a third embodiment of the present invention, and shows a state in which a heat conductive member and a buffer material are attached to the rear surface of the plasma display panel. In particular, in the plasma display device according to the third embodiment of the present invention, the two thermally conductive members 14 are closely attached to each other so that there is no gap between the two thermally conductive members 14. In this case, neighboring sides between the heat conductive members 14 are directly faced, and using this method, a plurality of small heat conductive members 14 are attached to each other, compared to attaching a large heat conductive member having the same area. In addition, it is possible to minimize the occurrence of air gaps between the PDP 12 and the heat conductive member. Therefore, there is an advantage that can minimize the heat radiation degradation caused by the generation of such gaps.

In the plasma display device according to the third embodiment of the present invention, at least one of the intervals d ₂₉ , d ₃₀ , d ₃₁ , and d ₃₂ between the heat conductive member 14 and the buffer material 20 is maintained at a predetermined distance, thereby providing a heat conductive member. Even if no cushioning material was provided between (14), the color band phenomenon did not appear in a PDP, maintaining sufficient adhesive force. Since the plasma display device according to the third embodiment of the present invention is the same except for the number of the plasma display device and the heat conductive member 14 according to the first embodiment of the present invention, a detailed description thereof will be omitted.

It is preferable that the space | interval between these heat conductive members 14 is 0 mm-5 mm, More preferably, it is 3 mm or less. In addition, the interval between the heat conductive member 14 and the buffer member 20 is preferably 5 mm or less, preferably 3 mm or less. If the above gaps are more than 5 mm, the space where the PDP 12 and the chassis base 16 do not contact each other becomes wider, so that the adhesion force between the PDP 12 and the chassis base 16 is lowered as well as in this portion. The heat dissipation performance is lower than the heat dissipation performance of the portion to which the heat conductive member 14 is attached, so that the color stripe phenomenon still appears. Hereinafter, the distance between the heat conducting members 14 and the distance between the heat conducting members 14 and the buffer material 20 will be measured more closely through the experimental example. The experimental examples described below are merely to illustrate the present invention, but the present invention is not limited thereto.

Experimental Example

In this experimental example, a 42-inch plasma display device for 220V was manufactured using three sheets of graphite material of 440mm × 500mm size as a heat conducting member, and then aged for 10 minutes to determine whether a color band phenomenon occurred. , After applying the Full White pattern for the afterimage measurement, the luminance of the A, B, C portion of Figure 5 was measured, respectively. 5 is a rear view of the plasma display panel according to the experimental example of the present invention. In the present invention, experiments varying the distance (d ₁₁ ) between the heat conductive members 14, the luminance of the A portion and C portion with the heat conductive member 14 attached, and the B portion without the heat conductive member 14 attached Was measured, and it was examined whether or not a color band phenomenon appeared according to the luminance difference.

Experimental Example 1

With the distance d ₁₁ between the heat conductive members 14 being 3 mm, the brightness | luminance of A, B, and C parts was measured on the conditions similar to the above. As a result, the luminance of part A was measured at 75.6 cd / m ² , the luminance at part B was measured at 75.8 cd / m ² , and the luminance at part C was measured at 76.9 cd / m ² .

Experimental Example 2

With the distance d ₁₁ between the heat conductive members 14 being 10 mm, the luminance of the A, B, and C portions was measured under the same conditions as described above. As a result, the luminance of part A was 85.2cd / m ² , the luminance of part B was 80.1cd / m ² , and the luminance of part C was 86.0cd / m ² .

Experimental Example 3

The luminance of A, B, and C portions was measured under the same conditions as described above with the distance d ₁₁ between the heat conductive members 14 being 20 mm. As a result, the luminance of part A was 75.6cd / m ² , the luminance of part B was 72.3cd / m ² , and the luminance of part C was 76.1cd / m ² .

Comparative example

For comparison with the experimental example of the present invention, after attaching a 3M tape having a width of 10 mm between the thermally conductive members, the luminance of the A, B, and C portions were measured under the above conditions. As a result, the luminance of the A part was 76.7 cd / m ² , the luminance of the B part was 72.9 cd / m ² , and the luminance of the C part was 76.2 cd / m ² .

The results of the above experiments are shown in Table 1 below.

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In the above experimental results, it was confirmed that the color stripe disappears, especially when the distance d ₁₁ between the heat conductive members 14 is 3 mm as in Experimental Example 1.

As described above, in the present invention, the color band phenomenon that occurs in the PDP can be eliminated by adjusting the gap between the heat conductive members and the gap between the heat conductive members and the buffer member, thereby providing a better quality screen.

As described above, according to the exemplary embodiment of the present invention, the thermal conductive member and the buffer material are spaced apart from each other so that neighboring sides of the thermal conductive members face each other, thereby maintaining the adhesion between the PDP and the chassis base while maintaining the adhesion between the PDP and the chassis base. You can eliminate the phenomenon.

In addition, since a plurality of thermally conductive members may be used depending on the size of the PDP, there is an advantage in the flexibility of the process.

And the color stripping phenomenon can be eliminated more completely by setting the space | interval between heat conductive members and the space | interval between buffer and heat conductive members to 0 mm-5 mm.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

Claims (6)

Plasma display panels (PDPs); A chassis base disposed substantially parallel to the plasma display panel; Two or more thermally conductive members interposed between the plasma display panel and the chassis base to be in close contact with the plasma display panel and the chassis base; And A cushioning material attached between the plasma display panel and the chassis base along the outermost portion of the heat conductive member. Including; The heat conductive members are disposed to directly face each other adjacent sides, And at least one of the gaps between the thermally conductive members is between 0 mm and 5 mm. The method of claim 1, And the thermally conductive member and the buffer material are spaced apart from each other. delete The method of claim 1, And at least two of the thermally conductive members, at least one of the gaps between the thermally conductive members is 3 mm or less. delete delete

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