KR20050045141A - Plasma display device - Google Patents

Abstract

The present invention relates to a plasma display device having a structure that can further improve the heat radiation effect of the drive board.

Accordingly, the plasma display device of the present invention includes a plasma display panel; A chassis base connected to and supported by the plasma display panel; A driving board disposed on a surface opposite to a surface on which the plasma display panel of the chassis base is installed to apply an electrical signal for driving the plasma display panel; And a heat sink type heat dissipation member installed on the driving board to dissipate heat generated from the driving board when the plasma display panel is driven, wherein the heat dissipation member is in an oblique direction with respect to the vertical direction of the chassis base. It is positioned to be inclined and configured to allow the flow of convective air.

Description

Plasma display device {PLASMA DISPLAY DEVICE}

The present invention relates to a plasma display device, and more particularly, to a plasma display device having a structure capable of further improving the heat dissipation effect of a driving board.

As is well known, a plasma display panel (PDP, hereinafter referred to as 'PDP' for convenience) is a display panel that displays an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in discharge cells. The performance of brightness, contrast, viewing angle, etc. is excellent, and a large screen can be implemented in a thin and light form, and its frequency of use is increasing day by day.

The conventional plasma display device surrounds a PDP in which a predetermined image is implemented, a chassis base in which a PDP is installed, a driving board installed in the chassis base facing the PDP, a PDP, a chassis base, and a driving board to cover the appearance of the plasma display device. It consists of a case to form.

The case includes a front cover positioned in front of the PDP and a back cover positioned behind the PDP. Here, the front cover and the back cover generally have a coupling structure detachable from each other.

The driving board mounted on the chassis base includes a power supply board, an image processing board, a logic board, an address buffer board, an X board, a Y board, and the like, and a plurality of circuit elements are mounted on each board.

However, the circuit elements installed in the driving board generate heat as much as high voltages are handled, and if the heat is not sufficiently radiated to the outside, the circuit elements may malfunction.

In order to solve such a heat dissipation problem of the driving board, a conventional plasma display apparatus according to an embodiment seals the space between the back cover and the driving board and installs a blowing means such as a fan to force convection into the space. However, the above structure is advantageous for heat dissipation, but the noise generated from the fan causes the consumer to feel uncomfortable.

On the other hand, the conventional plasma display device according to another example is implemented to release the heat generated from the drive board by natural convection by employing a plurality of heat sink type heat dissipation member to remove the fan as described above.

However, in the conventional plasma display device, since the heat dissipation member is disposed in parallel with the flow direction of convective air, in the art, in order to further improve the heat dissipation characteristics of the heat dissipation member, the structure of the heat dissipation member is carefully considered from the initial design stage. It is true.

Accordingly, an object of the present invention is to solve the above problems, and an object thereof is to provide a plasma display device having a structure capable of maximizing the effect of natural convection in order to actively release heat generated from a driving board.

In order to achieve the above object, a plasma display device according to the present invention includes a plasma display panel; A chassis base connected to and supported by the plasma display panel; A driving board disposed on a surface opposite to a surface on which the plasma display panel of the chassis base is installed to apply an electrical signal for driving the plasma display panel; And a heat sink type heat dissipation member installed on the driving board to dissipate heat generated from the driving board when the plasma display panel is driven, wherein the heat dissipation member is in an oblique direction with respect to the vertical direction of the chassis base. It is positioned to be inclined and configured to allow the flow of convective air.

In the plasma display device according to the present invention, the driving board may include a plurality of circuit elements installed to be in substantially contact with the heat dissipation member, and the circuit elements may be disposed at a position that does not disturb the flow of convective air.

Plasma display device according to the invention, the front cover located in front of the plasma display panel; And a back cover positioned behind the chassis base and integrally assembled to the front cover with the chassis base, wherein the back cover has an inlet and an exhaust port to allow convective air flow.

In the plasma display device according to the present invention, the respective heat radiating members may be disposed to be inclined in the same direction with respect to the vertical direction of the chassis base.

In the plasma display device according to the present invention, each of the heat dissipation members may be disposed to be inclined in a direction symmetrical with respect to the vertical direction of the chassis base.

Therefore, in the plasma display device according to the present invention, since the heat sink type heat dissipation member may be disposed in an oblique direction to maximize the effect of natural convection, the heat dissipation performance of the heat dissipation member may be further improved to back cover heat generated from the driving board. Its characteristics are that it can be actively released to the outside.

Hereinafter, exemplary 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, Figure 2 is a front configuration diagram schematically showing a portion "A" of FIG.

As shown in the drawing, the plasma display device of the present invention basically forms an image with two glass substrates 3a and 3b and substantially realizes an image, and one surface of the PDP 3, that is, an image. Is arranged on the opposite side to be implemented, the chassis base (7) coupled with the PDP (3), the front cover (1) arranged on the front side of the PDP (3), and the bag disposed on the rear side of the chassis base (7). Cover 9.

Here, a heat dissipation sheet (not shown) for transferring heat generated from the PDP 3 to the chassis base 7 is disposed between the PDP 3 and the chassis base 7, and the front cover 1 has a PDP ( A filter 2 is mounted to shield electromagnetic waves emitted from 3).

In the above, the PDP 3 is generally shaped in the shape of a substantially rectangular shape (a rectangle having a wide width in the present embodiment), and the chassis base 7 has a shape corresponding to that of the PDP 3, while the heat conduction is performed. It is provided with a material such as aluminum having excellent properties. In such a chassis base 7, a plurality of drive boards 5 necessary for driving the PDP 3 are mounted on the other surface opposite to the surface on which the PDP 3 is attached, and the drive board 5 drives this drive. A screw groove provided in the board 5 and a screw fastened to a boss (not shown) provided in the chassis base 7 are mounted on the rear surface of the chassis base 7.

The driving board 5 mounted to the rear of the chassis base 7 includes an X, Y board, an image processing board, a switching mode power supply (SMPS) board, and the like, and the configuration thereof is well known. Similarly, various circuit elements 6 such as field effect transistors (FETs) are mounted on a printed circuit board through lead wires. Furthermore, a plurality of heat sink type heat dissipation members 8 are provided in the drive board 5 to dissipate heat generated from the drive board 5 including the circuit element 6. The heat dissipation member 8 is usually fixed to the drive board 5 by soldering a plurality of lugs.

The PDP 3 and the chassis base 7 are combined with each other to form one module 4, which module 4 is arranged into the front cover 1 and the back cover 9, which are mutually coupled to each other. As a result, one plasma display device set is constituted.

In the operation of the plasma display device, the displacement current and the large discharge current flow through the PDP 3 due to the characteristics of the device, and heat generated by the impedance is generated in the driving board 5 including the circuit element 6.

Accordingly, the plasma display device according to the embodiment of the present invention improves the arrangement of the heat dissipation member 8 as described above, and thus the natural convection effect of air generated in the space between the back cover 9 and the driving board 5. Maximized heat dissipation has a structure that can more actively radiate heat generated from the drive board (5).

Each of the heat dissipation members 8 has a plurality of heat dissipation fins (not shown) composed of protrusions and grooves, which are arranged continuously or discontinuously on the drive board 5, and preferably in contact with the circuit elements 6. It is installed. Each heat radiating member 8 is inclined in an oblique direction with respect to the vertical direction of the chassis base 7. Each heat dissipation member 8 is disposed to be inclined by a predetermined angle in the same direction with respect to the vertical direction of the chassis base 7. The reason for the inclined installation of the heat dissipation member 8 in the oblique direction is to smoothly induce the flow of air by natural convection in the space between the back cover 9 and the drive board 5, and to prevent the flow of convection air. This is to maximize the heat dissipation characteristics of the driving board 5 by increasing the area in contact with convective air in an angle range that does not interfere. At this time, the circuit element 6 installed on the driving board 5 and in contact with the heat dissipation member 8 has a position where the air flow guided by the heat dissipation member 8 does not obstruct, that is, convection air dissipates the heat dissipation member 8. ) Is installed at a position that is not substantially in contact with That is, it is natural that convective air should act directly on the circuit element 6 because the heat generating source is the circuit element 6, but the heat of the heat dissipation member 8 is higher than heat dissipation of the circuit element 6 due to convective air. Since the emission is more effective, the circuit element 6 is installed in a position where it is not obstructed by convective air.

FIG. 3 is a variant of FIG. 2, in which each heat dissipation member 8 is disposed inclined in a direction symmetrical with respect to the vertical direction of the chassis base 7. Specifically, any one heat dissipation member 8 shown in the drawing is disposed inclined in the right direction, the other heat dissipation member 8 is disposed inclined in the left direction.

In the present invention, as shown in Figure 1, each of the heat dissipation member (8) can be arranged in a diagonal direction while continuously positioned in a plurality of rows, as shown in Figures 2 and 3, the heat dissipation member (8) May be disposed in an oblique direction while being positioned discontinuously.

4 is a cross-sectional configuration view showing the back cover portion shown in FIG.

As shown in the drawing, the back cover 9 forms a plurality of through holes 9a at positions indicating a relatively large amount of heat generated in the driving board 5. According to the embodiment of the present invention, the back cover 9 has at least one inlet port 9b formed at a lower edge portion for sucking outside air at a relatively low temperature into the space between the drive boards 5. At least one exhaust port 9c for discharging the air warmed by the heat generated from the drive board 5 to the outside by natural convection is formed at the upper edge portion.

In the plasma display device of the present invention having the arrangement of the heat dissipation member 8 as described above, heat is generated in the driving board 5 including the circuit element 6 when the PDP 3 is driven. The heat generated from the driving board 5 is released into the space between the back cover 9 and the driving board 5 through the heat dissipation member 8 to heat the air in the space. Then, the cold airflow which maintains comparatively low temperature under the back cover 9 flows into the said space through the inlet 9b. At this time, the cool air flowing through the inlet 9b rises in the vertical direction of the chassis base 7 by natural convection. Since each of the heat radiating members 8 is disposed in an oblique direction, each of the heat radiating is performed. It strikes the member 8 and ascends along the dotted line shown in the figure. Then, unlike the related art, since the contact degree of the air gap which hits the heat radiating member 8 increases, the heat radiating effect of the heat radiating member 8 further improves. As a result, the cold air flow guided into the space between the back cover 9 and the driving board 5 reduces the temperature of the driving board 5 by the above convection action. Thereafter, the warm air warmed in the space is discharged to the outside of the bag cover 9 through the exhaust port 9c.

As described above, according to the present invention, since the heat sink type heat dissipation member is disposed in an oblique direction to maximize the effect of natural convection, the heat dissipation performance of the heat dissipation member is further improved, thereby actively dissipating heat generated from the driving board to the outside of the back cover. Can be released.

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

FIG. 2 is a schematic front view of part “A” of FIG. 1.

3 is a front configuration diagram showing a modification of FIG. 2.

4 is a cross-sectional configuration view showing the back cover portion shown in FIG.

Claims (5)

A plasma display panel; A chassis base connected to and supported by the plasma display panel; A driving board disposed on a surface opposite to a surface on which the plasma display panel of the chassis base is installed to apply an electrical signal for driving the plasma display panel; And Heat sink type heat dissipation member installed on the driving board in order to dissipate heat generated from the driving board when the plasma display panel is driven. Including, And the heat dissipation member is inclined in an oblique direction with respect to the vertical direction of the chassis base to enable the flow of convection air. The method of claim 1, And a plurality of circuit elements installed in the driving board to be in substantial contact with the heat dissipation member, wherein the circuit elements are disposed at positions where the flow elements do not disturb the flow of convective air. The method of claim 1, A front cover positioned in front of the plasma display panel; And A back cover positioned behind the chassis base and integrally assembled to the front cover together with the chassis base. More, And the back cover has an inlet and an exhaust port to allow convective air to flow. The method according to any one of claims 1 to 3, And each of the heat dissipation members is disposed to be inclined in the same direction with respect to the vertical direction of the chassis base. The method according to any one of claims 1 to 3, And each of the heat dissipation members is disposed to be inclined in a direction symmetrical with respect to the vertical direction of the chassis base.