KR100578968B1 - Plasma display apparatus - Google Patents

Abstract

The present invention is to improve the heat dissipation characteristics of the circuit elements inside the plate by improving the structure of the plate installed for the noise shield of the circuit board so that a large amount of air can be guided into the plate, the chassis base; A plasma display panel mounted on the chassis base; And a driving circuit unit mounted on the chassis base to apply a driving signal to the plasma display panel, wherein the soundproof plate covering the circuit elements mounted on the circuit board of the driving circuit unit has a height different from a center portion and a tip portion of the circuit board. A plasma display device having a structure is provided.

Drive circuit part, circuit board, plate, air guide part, side plate

Description

Plasma display device {PLASMA DISPLAY APPARATUS}

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

2 is a perspective view of a part of a plasma display device according to an embodiment of the present invention;

3 is a side sectional view showing a part of a configuration of a plasma display device according to an embodiment of the present invention;

4 and 5 are side cross-sectional views showing some components of a plasma display device according to another embodiment of the present invention.

The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of increasing heat dissipation efficiency of heat generated from a driving circuit unit.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is a red (R) and green light generated by excitation of phosphors by vacuum ultraviolet (VUV) radiation emitted from plasma obtained through gas discharge. (G) and (B) are display elements for implementing a predetermined image using visible light. The PDP can realize a 60-inch or larger screen with a thickness of only 10 cm or less, and since it is a self-luminous display device such as a CRT, it has no characteristic of distortion due to color reproduction and viewing angle, and also has a simple manufacturing method compared to LCD. It is gaining attention as a TV and industrial flat panel display that have strengths in terms of productivity and cost.

In general, the configuration of the plasma display device is as follows.

That is, a PDP is mounted on one side and a driving circuit unit for applying a signal for driving the PDP is mounted on one side with a chassis base made of a material having good thermal conductivity such as aluminum. A front cover is disposed in front of the PDP, and a rear cover is disposed behind the driving circuit unit, and they are coupled to each other to form a plasma display device set.

The PDP may be classified into a direct current type and an alternating current type according to a driving voltage waveform applied thereto, and may be classified into a counter discharge or a surface discharge type according to the structure of the discharge cell and the shape of the electrode. Among these, the surface discharge type PDP, which is widely adopted at present, realizes a screen by causing plasma discharge inside the discharge cell by the interaction of the X electrode, the Y electrode and the address electrode.

Therefore, in the plasma display device adopting such a PDP, a driving circuit unit includes an X driving board, a Y driving board, and an address driving board to drive the electrodes, and each of these driving boards requires signals for driving each electrode. It serves to apply voltage. In addition, the image and logic board is provided to receive the image signal from the outside to generate the address control signal and the sustain discharge signal and apply to the address driving board and the X and Y driving board, respectively. In addition to these driving circuits, a power board is provided to be connected to the driving board and the like to supply power for driving a PDP.

In the conventional plasma display apparatus, a plurality of circuit elements are mounted on a circuit board in the driving circuit unit. In particular, since a large amount of heat is generated in the case of FET-type circuit elements, a heat sink in contact with a circuit element is provided. Will be installed.

The heat sink has a structure larger than that of a circuit element, and a plurality of heat dissipation ribs are arranged on one side thereof, and heat generated in the circuit element is released into the atmosphere through a heat sink in contact with the circuit element.

In addition, the plasma display apparatus covers the upper portion of the circuit board with a soundproof plate to shield noise generated from the circuit elements.

The sound insulation plate is attached to the heat sink via a thermally conductive medium to cover the circuit elements mounted on the circuit board. Accordingly, the noise generated by the circuit elements is blocked by the plate and does not spread to the outside.

By the way, in the above conventional structure, the plate is made of a material having thermal conductivity of itself, improving heat dissipation characteristics, and the heat conductive medium connecting the plate and the heat sink is also made of a material having elastic force of its own. It serves to absorb the mechanical vibrations of the liver, there is a problem that the heat radiation effect is lowered by limiting the flow of air through each circuit element.

In other words, the amount of air passing through the heat sink is limited between the circuit board on which the heat sink is installed and the plate, so that a large amount of air cannot be distributed, so that the heat dissipation effect is lowered.

The present invention was devised to solve the above problems, and its object is to improve the structure of the plate installed for noise shielding of the circuit board so that a large amount of air can be guided and distributed inside the plate The present invention provides a plasma display device having improved heat dissipation characteristics of an inner circuit element.

In order to achieve the above object, the present invention is to extend the front end of the plate to the outside so that a large amount of air can be guided between the circuit board and the plate.

To this end, the plasma display device of the present invention includes a chassis base; A plasma display panel mounted to the chassis base; A driving circuit unit mounted on the chassis base to apply a driving signal to the plasma display panel;
The soundproof plate covering the circuit elements mounted on the circuit board of the drive circuit section has a structure at one end of which includes an air guide section having a height different from that of the plate with respect to the circuit board.

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In this case, the height of the air guide portion is preferably higher than the center portion structure.

Here, the air guide unit having the height difference is preferably formed at the lower end of the plate when the plasma display device is placed vertically. This is because air usually flows from the bottom to the top by the heat generated in the drive circuit section.

More preferably, the lower end as well as the upper end of the plate form different height differences from the center part.

At this time, the top and bottom of the plate may be a structure symmetrical to each other in the same structure.

In addition, the upper and lower end portions of the plate may be a structure that is inclined outward from the front end of the plate, preferably the end that is inclined can be extended to the structure bent in parallel with the plate again, more preferably the bending The portion is gently curved to the outside to extend the flow of air passing through the plate in a delayed manner to be introduced into the plate along the bent surface.

In addition, according to another embodiment of the present invention, when the plasma display device is placed vertically, the side plate may be formed to extend perpendicular to the side of the plate to cover the circuit board of the plate and the driving circuit unit.

The side plate may be formed only on the outer side of the plate relative to the chassis base, preferably on both sides of the plate.

Accordingly, the air introduced between the plate and the circuit board along the upper and lower ends of the plate does not escape to the outside by the side plate of the plate and intensively passes between the plate and the circuit board, thereby increasing the heat dissipation effect. .

In addition, more preferably, the side guide portion extending outwardly may be further formed at the tip of the side plate.

Accordingly, the air passing outside the plate through the side guide portion as much as possible between the plate and the circuit board to maximize the heat radiation effect of the circuit element.

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

1 is a perspective view schematically showing a plasma display device according to an embodiment of the present invention, FIG. 2 is a perspective view of a partial configuration of a plasma display device according to an embodiment of the present invention, and FIG. 3 is according to an embodiment of the present invention. Side sectional drawing which shows a some structure of a plasma display apparatus.

According to the above drawings, the plasma display device according to the present embodiment basically includes a plasma display panel 12 and a chassis base 16. The plasma display panel 12 is mounted on one side of the chassis base 16 by adhesive means such as a double-sided tape, and the driving circuit unit 21, 23, 25, 27 for driving the plasma display panel 12 on the other side thereof. , 29) is mounted. The chassis base 16 is disposed substantially parallel to the plasma display panel 12, and a heat radiating medium (or a heat conducting medium; not shown) is interposed therebetween.

In addition, the front cover 41 is positioned outside the plasma display panel 12, and the rear cover 43 is disposed outside the driving circuit portions 21, 23, 25, 27, and 29 of the chassis base 16. As they are located, they combine to form a set of plasma display devices.

Although not shown in detail, the plasma display panel 12 according to the present exemplary embodiment includes the driving circuits 21, 23, 25, 27, with the X electrode, the Y electrode, and the address electrode arranged in a lattice form between a pair of opposing substrates. 29, a predetermined image is generated while causing plasma discharge in accordance with the signal applied from the same.

In the plasma display apparatus 10 having the above structure, the driving circuit portion includes a plurality of circuit elements 33 mounted on the circuit board 32, and one circuit element 33 is formed from the circuit element 33. A heat sink 34 is attached to heat the generated heat to the outside.

In addition, the driving circuit part has a structure in which a plate is provided on the heat sink 34 via a thermally conductive medium 35 to cover one end of the circuit element 33. Accordingly, the noise generated by the circuit element 33 is blocked by the plate 30 and does not spread to the outside, and attenuates and disappears between the plate and the circuit board 32.

When the plasma display device is placed vertically as shown in FIG. 1, the plate 30 has a structure in which an air guide part 31 is formed at a lower end facing the ground to expand outward.

The air guide part 31 is continuously formed along the lower end of the plate 30 and is preferably integrally formed with the plate 30.

It can be seen from FIG. 3 that the air guide part 31 is expanded and opened. The air guide part 31 formed at the tip of the plate 30 is inclined in a direction away from the circuit board 32. The end of the extended and extended portion is again bent in parallel with the plate 30, so that the gap between the original plate 30 and the circuit board 32 is further extended and widened.

Accordingly, the air passing through the plate 30 is naturally guided into the plate 30 by the air guide part 31 so as to pass between the plate 30 and the circuit board 32 to deliver more air. ) And the circuit board 32 can be introduced.

Meanwhile, as shown in FIG. 4, the air guide part 31 is smoothly bent and extended from the end of the plate 30 to the end of the air guide part 31, thereby extending the air guide part 31. Air guided by the can be guided naturally into the plate 30 without being caught by the air guide portion 31.

By further forming the air guide portion 31 in the plate 30 as described above it is possible to smoothly induce the progress of the air in the state of not rapidly changing the flow of air, which acts to reduce the noise in hydrodynamic aspects.

Here, as shown in FIG. 5, the air guide part 31 is formed not only at the lower end of the plate 30 in the direction of the ground in FIG. It is possible to induce air flow smoothly in both directions.

Meanwhile, according to another exemplary embodiment of the present apparatus, as shown in FIGS. 1 and 2, the side plates 36 are formed at both side ends of the plate 30 (the ends corresponding to the left and right sides when the plasma display device is placed vertically). This is further formed to be bent at right angles on the circuit board 32 to cover the circuit board 32 and the plate 30.

Accordingly, the series of circuit elements 33 mounted on the circuit board 32 may be connected to the upper end of the plate 30 which is opened in a blocked state by the plate 30 and the side plate 36 installed in the heat sink 34. Air flows through the bottom.

This structure prevents the air guided between the plate 30 and the circuit board 32 from escaping to the side of the plate 30 through the air guide part 31 installed at the bottom or / and the top of the plate 30. It is possible to concentrate the flow of air to the plate 30 inside.

Therefore, the heat dissipation characteristics of the circuit element 33 including the heat sink 34 can be improved.

Here, the lower side and / or the upper side of the side plate 36 may be formed to extend the side guide portion (not shown) to the outside like the air guide portion 31 formed on the plate 30, in this case the side The air passing through the plate 36 is also smoothly guided between the plate 30 and the circuit board 32 by the side guide part so as to reduce the noise generated by the side plate 36 and increase the heat radiation effect by increasing the amount of air. Will be.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the plasma display device according to the present invention, the heat radiation effect can be enhanced by increasing the amount of air passing through the circuit element by inducing air.

In addition, it is possible to smoothly guide the flow of air through the plate to reduce the noise generated by the plate.

Claims (10)

Chassis base; A plasma display panel mounted on the chassis base; A driving circuit unit mounted on the chassis base to apply a driving signal to the plasma display panel; A soundproof plate covering a circuit element mounted on a circuit board of the driving circuit unit; And And an air guide part provided at one end of the plate and having a height different from that of the plate with respect to the circuit board. The plasma display apparatus of claim 1, wherein a height of the air guide portion is higher than a center portion of the plate. The plasma display apparatus of claim 2, wherein the air guide part is provided at a lower end of the plate to face the ground. The plasma display apparatus of claim 2, wherein the air guide part is formed at an upper end of the plate corresponding to the lower end. The plasma display apparatus of any one of claims 1 to 4, wherein the air guide portion extends inclined in a direction away from the driving circuit portion. 6. The plasma display apparatus of claim 5, wherein the air guide portion has a bent end extending in parallel with the plate. The plasma display apparatus of claim 6, wherein the air guide portion is bent smoothly. The plasma display apparatus of any one of claims 1 to 4, further comprising a side plate formed on a side surface of the plate with respect to the front end portion of the air guide portion and bent downward toward a driving circuit portion. The plasma display apparatus of claim 8, further comprising a side guide part extending outwardly at an end of the side plate. The plasma display apparatus of claim 9, wherein the side plates are formed at both sides of the plate.

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