KR100709211B1 - Plasma display device - Google Patents

Abstract

The present invention relates to an improved plasma display device for reducing noise generated in the plasma display device.

A plasma display device according to the present invention includes a plasma display panel; A heat conducting medium attached to a rear surface of the plasma display panel and having at least one vibration reducing hole drawn in a predetermined depth on a plane thereof; And a chassis base disposed on a rear surface of the plasma display panel at a predetermined distance from the thermally conductive medium to support the plasma display panel.

Plasma Display Panels, PDPs, Chassis Bases, Thermal Conductive Media

Description

Plasma display device {PLASMA DISPLAY DEVICE}

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

FIG. 2 is a longitudinal cross-sectional view of the plasma display device of FIG. 1 assembled; FIG.

3 is an exploded perspective view schematically showing the configuration of a plasma display device according to a second embodiment of the present invention;

4 is an exploded perspective view schematically illustrating a configuration of a plasma display device according to a third embodiment of the present invention.

FIG. 5 is a longitudinal cross-sectional view of the plasma display device of FIG. 4 assembled; FIG.

6 is an exploded perspective view schematically showing the configuration of a plasma display device according to a fourth embodiment of the present invention.

FIG. 7 is a longitudinal cross-sectional view of the plasma display device of FIG. 6 assembled; FIG.

8 is a schematic plan view showing a rear surface of the plasma display panel shown for explaining the operation of the plasma display device according to the present invention;

The present invention relates to a plasma display device, and more particularly, to an improved plasma display device for reducing noise generated in the plasma display device.

In general, a plasma display panel (hereinafter referred to as a PDP) is a display device that realizes an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell, and displays display capacity, brightness, and contrast. ), Excellent viewing angle, etc., and a thin and lightweight large screen.

The plasma display apparatus surrounds a PDP that implements an image as described above, a chassis base supporting the PDP, driving boards installed on the chassis base facing the PDP, a PDP, a chassis base, and a driving board. It is configured to include a case forming the appearance of the device.

The case also includes a front cover positioned in front of the PDP and a back cover positioned behind the PDP. The front cover and the back cover generally form a coupling structure that can be disassembled and bonded to each other. A heat conducting medium is interposed between the PDP and the chassis base located in the cover, and the heat conducting medium transfers heat generated from the PDP to the chassis base to radiate heat.

The noise generated from the plasma display device configured as described above is mainly generated from the panel surface of the PDP, and the noise generated from the printed circuit board assembly (PBA) mounted to the chassis base provided with a plurality of circuit boards. have. In particular, the noise generated on the panel surface is excited by the electrostatic force generated by the discharge, and the noise generated by the structural collision thereby.

The generated noise is transmitted to the circuit board assembly through the chassis base attaching the PDP to raise the noise in the circuit board assembly. As described above, the structural transmission characteristics of the PDP vibration vary greatly according to the adhesive form of the heat conductive medium and the chassis base provided between the PDP and the chassis base and the material of the heat conductive medium.

Conventionally, it is generally considered that the heat conduction medium and the chassis base are in close contact with each other in terms of noise.

As described above, when power is supplied to the conventional plasma display device, noise is generated in various circuit components of the circuit board assembly by the flow of current required in the PDP, and structural vibration and noise are caused by electrostatic force between electrodes in the PDP. This is happening.

In the case of the conventional plasma display device, since the PDP and the chassis base are bonded to each other by a strong adhesive tape, the vibration and noise generated from the PDP are transferred to the chassis base as they are and are emitted as the noise of the circuit board assembly. In addition, there is a change in noise due to vibration transmission in accordance with the elastic force of the heat conducting medium inserted between the PDP and the chassis base.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display device which fundamentally reduces vibrations of a PDP to reduce noise.

Plasma display device of the present invention for achieving the above object, the plasma display panel; A heat conducting medium attached to a rear surface of the plasma display panel and having at least one vibration reducing hole drawn in a predetermined depth on a plane thereof; And a chassis base disposed on a rear surface of the plasma display panel at a predetermined distance from the thermally conductive medium to support the plasma display panel.

In the present invention, a plurality of vibration reducing holes are formed at regular intervals.

In the present invention, the vibration reducing hole is formed to be inclined at a predetermined angle, the angle of the vibration reducing hole is made of 45 degrees.

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

FIG. 1 is an exploded perspective view schematically illustrating a configuration of a plasma display device according to a first embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of the plasma display device assembled in FIG. 1.

Referring to each of the drawings, the plasma display device according to the first embodiment of the present invention, the PDP (1) for realizing the image using the plasma discharge, and one surface of the PDP (1), that is, the image is implemented A back cover disposed on the opposite side and including a chassis base 12 coupled to the PDP 1 and disposed on the front side of the PDP 1 and the rear cover of the chassis base 12. It further includes (7).

Since the present invention relates to the coupling relationship between the PDP 1 and its surrounding components, a detailed description of the PDP 1 is omitted here. The PDP 1 may be configured in various ways and may be driven in various ways, and includes such PDPs.

In the above plasma display device, the front cover 5 is provided with a filter 13 for shielding electromagnetic waves emitted from the PDP 1 so that the filter 13 is in contact with the surface of the PDP 1, The back cover 7 is integrally assembled to the chassis base 12 through a screw (not shown) while enclosing the chassis base 12 together with the front cover 5 to constitute the exterior of the apparatus.

In addition, the PDP 1 is generally formed in a substantially rectangular shape (a rectangle in which the length of the x axis direction is longer than the length of the y axis direction in the drawing), and the chassis base 12 is sufficient to support the PDP 1. It has a structural strength, and is made of a structure that can effectively reduce heat, noise and EMI (Electromagnetic Inference) generated in the PDP (1).

The chassis base 12 may be generally formed of an aluminum material having excellent rigidity and thermal conductivity. In such a chassis base 12, a circuit board assembly 30 for applying a signal necessary for driving the PDP 1 is provided on the opposite side of the surface in close contact with the thermally conductive medium 20 to be described later. It is attached to a large number by such.

In addition, a coupling member 40 for coupling the PDP 1 and the chassis base 12 is provided at an edge between the PDP 1 and the chassis base 12. The coupling member 40 is made of a conventional double-sided tape using a material having a predetermined elasticity.

And heat conduction on the back surface of the PDP 1 to realize the heat dissipation balance of the PDP 1 by conducting and dissipating heat generated in the PDP 1 quickly in the plane direction of the PDP 1 due to the driving of the PDP 1. The medium 20 is attached. The thermally conductive medium 20 may be formed of various materials such as silicon-based thermal conductive sheets, urethane-based thermal conductive sheets, acrylic thermal conductive sheets, graphite thermal conductive sheets, metallic thermal conductive sheets, or carbon nanotube thermal conductive materials.

In addition, the thermally conductive medium 20 is attached to the PDP 1 at regular intervals from the chassis base 12, and at least one vibration reducing hole 50 is inserted into the plane to a predetermined depth. Specifically, the thermally conductive medium 20 is adhered to the PDP 1 in close contact with an adhesive or a damping adhesive. At this time, the air layer A is formed between the heat conductive medium 20 and the chassis base 12 at regular intervals.

In addition, the vibration reducing holes 50 of the heat conductive medium 20 are formed by forming long diagonal grooves as shown in FIG. 1.

3 is an exploded perspective view schematically showing the configuration of a plasma display device according to a second embodiment of the present invention.

Prior to the description, since each embodiment described below is the same reference numerals as the first embodiment shown in Figs. 1 and 2 are made of the same configuration and operation, description thereof will be omitted, and the characteristic configuration and Only the operation will be described.

As shown in FIG. 3, as described above, the vibration reducing hole 50 of the thermal conductive medium 20 may be formed as a single continuous hole, and divided into a plurality of vibration reducing holes at regular intervals as shown in FIG. 3. 50a may be formed.

The vibration reducing hole 50a of the heat conductive medium 20 is preferably formed to be inclined at a predetermined angle to double the vibration reduction effect. At this time, the inclination angle of the vibration reducing hole 50a of the heat conductive medium 20 is 45 degrees, and the present invention is not limited to such a limited angle.

4 is an exploded perspective view schematically illustrating a configuration of a plasma display device according to a third embodiment of the present invention, and FIG. 5 is a longitudinal cross-sectional view of the plasma display device assembled in FIG. 4.

4 and 5, the vibration reducing groove 20b for vibration reduction is formed in the heat conductive medium differently from those shown in FIGS. 1 to 3. The vibration reducing groove 20b is formed by being drawn into the thermal conductive medium 20 to a predetermined depth.

Other features of the vibration reducing groove 20b are configured in the same manner as the vibration reducing hole 50.

FIG. 6 is an exploded perspective view schematically illustrating a configuration of a plasma display device according to a fourth embodiment of the present invention, and FIG. 7 is a longitudinal cross-sectional view of the plasma display device assembled in FIG. 6.

6 and 7, the plasma display device according to the fourth embodiment of the present invention is opposed to the heat conductive medium 20 having the vibration reduction hole 50 as described above and is disposed on the front surface of the chassis base 12. Further comprising a sound absorbing member 60 is disposed, wherein the heat conducting medium 20 is installed in close contact with the back of the PDP (1), the sound absorbing member 60 is in close contact with the front surface of the chassis base 12 do.

In addition, an air layer A is formed between the thermally conductive medium 20 and the sound absorbing member 60 at a predetermined interval.

In addition, like the first embodiment according to the present invention, in the fourth embodiment according to the present invention shown in Figs. And inclined at a predetermined angle, the angle of which is 45 degrees, and is formed on a surface opposite to the chassis base 12.

In addition, the sound absorbing member 60 is formed by coating a sound absorbing material or vibration damping material on the chassis base 12, or the sound absorbing material or vibration damping material is formed in a sheet form as illustrated in FIG. 6. As such, it is attached to the rear surface of the chassis base 12.

As described above, the chassis base 12 has a sound absorbing member 60 attached to the rear side of the PDP 1 to support the PDP 1 made of glass, thereby reinforcing the mechanical rigidity of the PDP 1, and 1) The heat generated during the driving and conducted through the heat conductive medium 20 to dissipate to the atmosphere enables stable driving of the PDP 1.

Therefore, the chassis base 12 is made of aluminum, copper, iron, and the like to mount and support the PDP 1 on one side thereof, and the circuit board assembly 30 having a plurality in order to drive the PDP 1 on the other side thereof. It is mounted and supported by using a screw.

On the other hand, as described above, when there is an air layer between the heat conducting medium and the chassis base in the prior art, the air layer and the PDP and the chassis base may be bumped into each other according to the plan view, and progress to various forms of noise depending on the strength of the heat conducting medium Therefore, it is necessary to keep them in close contact with each other so that relative motion does not occur between the PDP and the chassis base so that the above problems do not occur.

Therefore, as described above, the plasma display apparatus according to the present invention forms various types of vibration reducing holes 50 or vibration reducing grooves 20b in the heat conductive medium 20, and uses an adhesive or a damping adhesive. It adheres closely to the back surface of the PDP 1. In particular, the vibration reducing hole 50 of the thermally conductive medium 20 applies a diagonal structure to hold various natural vibration modes of the PDP (1).

Accordingly, the vibration of the PDP 1 can be fundamentally reduced by blocking the vibration transmission of the PDP 1 transmitted to the chassis base 12, thereby reducing the occurrence of structural vibration transmission noise of the PDP 1, and a circuit. The board assembly 30 may be utilized as a noise reduction structure.

4 and 5, the sound absorbing member 60 is provided on the rear surface of the chassis base 12 to maximize noise reduction.

More specifically, as shown in FIG. 8, the PDP 1 made of glass generates vibrations in the X and Y directions, and the vibration generated in this way is the chassis base 12 installed in conjunction with the PDP 1. And eventually generate noise.

Therefore, by suppressing the vibration generated in the X, Y direction of the PDP (1) it is possible to reduce or prevent the generation of noise. Accordingly, when the vibration reducing hole 50 is diagonally formed in the heat conducting medium 20 attached to the rear surface of the PDP 1, the vibration generated at the edge of the PDP 1 is blocked at the vibration reducing hole 50. do.

That is, even when vibration is generated in the X or Y direction of the PDP 1, the vibration reduction hole 50 is prevented from further vibrating in the vibration reduction hole 50, thereby suppressing the vibration of the PDP 1. Vibration vanishes within itself.

And even if the vibration of the PDP 1 is not completely dissipated and is transmitted to the chassis base 12 to some extent, the sound absorbing member 60 is installed on the rear surface of the chassis base 12, so that vibration transmission noise of the PDP 1 is achieved. Occurrence can be suppressed.

As described above, the plasma display device according to the present invention has the following effects.

By attaching a thermally conductive medium having various types of vibration reducing holes on the back of the PDP to the PDP, and attaching a sound absorbing member to the back of the chassis base so as to face the thermally conductive medium, vibration transmission noise of the PDP module can be suppressed.

Accordingly, the sound absorbing material and the vibration damping material used in the plasma display device can be deleted to reduce the noise generated as in the prior art, and the defect of the product can be significantly reduced, thereby contributing to cost reduction and improving the reliability of the product. .

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (17)

A plasma display panel; A heat conducting medium attached to a rear surface of the plasma display panel and having at least one vibration reducing hole drawn in a predetermined depth on a plane thereof; And a chassis base disposed on a rear surface of the plasma display panel with an air layer spaced apart from the thermally conductive medium to support the plasma display panel. The method of claim 1, Plasma display device characterized in that the plurality of vibration reducing holes are formed at a predetermined interval. The method according to claim 1 or 2, The vibration reducing hole is inclined at a predetermined angle formed plasma display device. The method of claim 3, And the angle of the vibration reducing hole is 45 degrees. A plasma display panel; A heat conducting medium attached to a rear surface of the plasma display panel and having at least one vibration reducing groove recessed in a predetermined depth on a plane thereof; And a chassis base disposed on a rear surface of the plasma display panel with an air layer spaced apart from the thermally conductive medium to support the plasma display panel. The method of claim 5, The vibration reducing groove is formed on the surface facing the chassis base. The method according to claim 5 or 6, Plasma display device characterized in that the plurality of vibration reducing grooves are formed at a predetermined interval. The method of claim 7, wherein The vibration reducing groove is formed inclined at a predetermined angle. The method of claim 8, And the angle of the vibration reducing groove is 45 degrees. A plasma display panel; A heat conducting medium disposed on a rear surface of the plasma display panel and having at least one vibration reducing hole drawn in a predetermined depth on a plane thereof; A chassis base disposed on a rear surface of the plasma display panel to support the plasma display panel; And a sound absorbing member disposed at a predetermined distance from the thermally conductive medium and facing the thermally conductive medium and disposed on a front surface of the chassis base. The method of claim 10, And the heat conductive medium is in close contact with a rear surface of the plasma display panel, and the sound absorbing member is in close contact with a front surface of the chassis base. The method according to claim 10 or 11, wherein Plasma display device characterized in that the plurality of vibration reducing holes are formed at a predetermined interval. The method of claim 12, The vibration reducing hole is inclined at a predetermined angle formed plasma display device. The method of claim 13, And the angle of the vibration reducing hole is 45 degrees. The method of claim 10, The sound absorbing member is a plasma display device consisting of a sound absorbing material is coated on the chassis base. The method of claim 10, The sound absorbing member is a plasma display device consisting of a vibration damper is coated on the chassis base. The method of claim 10, The sound absorbing member has a sound absorbing material or a vibration damping material in the form of a sheet attached to the front surface of the chassis base.

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