KR100741126B1 - Plasma display device - Google Patents

Abstract

The present invention relates to a plasma display panel in which an image is implemented in order to prevent thermal deformation between the reinforcing material and the chassis base to prevent defects caused by the falling of the panel; A chassis base disposed on a rear surface of the plasma display panel; The present invention provides a plasma display apparatus that supports the chassis base and is attached to the rear surface of the chassis base and includes a reinforcement divided into a plurality of parts.

Description

Plasma display device

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

2 is an enlarged view illustrating an enlarged portion A illustrated in FIG. 1.

Brief description of symbols for the main parts of the drawings

10: plasma display panel

11: front panel

12: back panel

20: chassis base

30: Stiffener

The present invention relates to a plasma display device, and more particularly, due to thermal deformation of the chassis base due to a difference in thermal expansion coefficient between the reinforcing material and the chassis base, the adhesion of the plasma display panel to the chassis base can be prevented from falling off. The present invention relates to a plasma display device.

The plasma display device is a flat panel display device that displays an image using a gas discharge phenomenon. The plasma display device is excellent in various display capacities such as display capacity, brightness, contrast, afterimage and viewing angle, and is thin and can display a large screen. It is attracting attention as the next generation large flat panel display device that can replace the.

The plasma display apparatus includes a plasma display panel, a chassis base disposed on a rear surface of the plasma display panel, and a circuit board disposed on a rear surface of the chassis base to drive a plasma display panel. In addition, the plasma display apparatus includes a signal transmitting means for transmitting a signal between the circuit board and the plasma display panel.

Plasma display devices tend to be thinner, so that the thickness of plasma display panels, chassis bases, and the like should be as thin as possible. In particular, unlike a plasma display panel having a complicated structure therein, the chassis base is formed to perform a function of releasing heat transferred from the plasma display panel and a function of supporting the plasma display panel.

When the chassis base becomes thin in order to realize a thinner plasma display device, it becomes difficult to perform a function of supporting the plasma display panel. Accordingly, a reinforcement is provided on the rear surface of the chassis base to prevent twisting or bending of the chassis base.

In the conventional thin plasma display device, when the thin chassis base is adopted, the portion of the chassis base to which the signal transmission means contacts is reduced, and thus the heat dissipation efficiency is reduced. In this case, a reinforcement of a material different from that of the chassis base may be assembled. By the way, each material has its own coefficient of thermal expansion, the thermal deformation of each material may be different when subjected to heat. Therefore, due to the difference in thermal deformation, warpage of the chassis base may occur, and as a result, a phenomenon in which the plasma display panel attached to and supported by the chassis base may flow down on the chassis base may cause defects of the plasma display panel.

The present invention provides a plasma display device capable of preventing warpage of the chassis base due to a difference in thermal expansion coefficient between the reinforcement and the chassis base by improving the assembly form of the reinforcement.

The present invention provides a plasma display panel in which an image is embodied, a chassis base disposed on a rear surface of the plasma display panel, and a reinforcement attached to a rear surface of the chassis base to support the chassis base and divided into a plurality of parts. A plasma display device is disclosed.

In the present invention, the reinforcing material may be made of a material containing a metal.

In the present invention, the reinforcing material may be made of a material containing aluminum.

In the present invention, the reinforcement may be arranged in the long side direction of the chassis base.

In the present invention, the chassis base may be made of a steel material.

Hereinafter, with reference to the embodiments of the present invention shown in the accompanying drawings will be described in detail the configuration and operation of the present invention. The embodiments described below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

 FIG. 1 is a schematic exploded perspective view of a plasma display device according to an embodiment of the present invention, and FIG. 2 is an enlarged view enlarging a portion A shown in FIG. 1.

1 and 2, the plasma display apparatus according to the exemplary embodiment illustrated in FIG. 1 includes a plasma display panel 10, a chassis base 20 disposed to face the plasma display panel 10, and the plasma display panel 10. It includes a circuit unit (not shown) for driving the.

The plasma display panel 10 has a structure in which the front panel 11 and the rear panel 12 face each other as a portion for displaying an image. The front panel 11 and the back panel 12 are arranged with a plurality of electrodes to which a voltage is applied, respectively, and these electrodes may be covered with a dielectric layer. Furthermore, a partition wall is formed between the front panel 11 and the rear panel 12 to define a plurality of cells in which discharge occurs, and a phosphor layer and a discharge gas may exist in the cell. The chassis base 20 is provided on the rear surface of the plasma display panel 10.

The chassis base 20 supports the plasma display panel 10 and the circuit unit (not shown), but also functions to promote heat dissipation thereof. Accordingly, the chassis base 20 may be made of a material, for example, a steel-based metal, which supports the plasma display panel 10 and the circuit unit (not shown) and has excellent heat conduction characteristics. The manufacture of the chassis base 20 may be by a method such as die casting.

The rear of the chassis base 20 is provided with a circuit portion (not shown) including various circuit elements for driving the plasma display panel 10 and circuit boards on which they are mounted.

A backing of the chassis base 20 may also be provided with a reinforcement to prevent bending or twisting of the chassis base 20.

Between the chassis base 20 and the plasma display panel 10, signal transmission means coupled to both are arranged. As the signal transmission means, a tape carrier package, a flexible printed cable, or the like may be used. In the case of a plasma display device using a slim signal transmission means such as a tape carrier package, a portion of the chassis base 20 to which the signal transmission means contacts is small to prevent the heat dissipation efficiency from being insufficient. 30 may be attached to the lower end of the chassis base 20 in the transverse direction. The reinforcing material 30 may be made of an aluminum material having good heat dissipation efficiency and workability. At this time, the reinforcing material 30 is formed of an aluminum material, while the chassis base 20 is formed of a steel-based material. In this case, the coefficient of thermal expansion of aluminum is approximately 23.8 μm / m ° C., and the coefficient of thermal expansion of steel is 12.6 μm / m ° C., so that the steel has a coefficient of thermal expansion of about 53 percent compared to that of aluminum.

As such, the chassis base 20 made of steel and the plate reinforcement 30 made of aluminum may be attached and assembled at the bottom of the chassis base. As described above, there is a difference between thermal deformations generated when the plasma display panel is driven due to a difference in thermal expansion coefficient. Will be created. The difference between such thermal deformations may result in warpage of the chassis base and a phenomenon in which the plasma display panel to which the chassis base is attached and supported flows down against the chassis base.

Thus, in the present invention, when the plate reinforcing material 40 is attached to the lower end of the rear surface of the chassis base 20, the plate reinforcement 40 is formed in a plurality of forms. As a result, even if there is thermal expansion when heat is generated due to the operation of the plasma display panel, it is possible to prevent the flow of the panel due to thermal deformation due to a space of a certain interval generated between the plurality of aluminum plate reinforcement.

At this time, the plate reinforcement of the aluminum material plays a role for heat dissipation of the signal transmission means, so the attachment area with the chassis base should be as wide as possible, so the gap between the reinforcement is smaller. However, if too narrow, thermal expansion will result in contact between neighboring stiffeners.

 Therefore, when assembling the stiffeners into a plurality of forms, the spacing between the stiffeners should be arranged at appropriate intervals, so the spacing between the stiffeners is determined in consideration of the heat generated during panel operation, the coefficient of thermal expansion of each material, and the size of the plate reinforcement.

The plasma display device according to the present invention improves the shape of the reinforcement coupled to the chassis base to compensate for the thermal deformation difference between the reinforcement and the chassis base due to the heat generated during the operation of the plasma display panel so that the plasma display panel flows down to the chassis base. There is an advantage in reducing the defects that occur.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true scope of the invention should be defined only by the appended claims.

Claims (5)

A plasma display panel on which an image is implemented; A chassis base disposed on a rear surface of the plasma display panel; And supporting the chassis base, the reinforcement being attached to an opposite side of a surface of the chassis base facing the plasma display panel, the reinforcement being divided into a plurality of parts. According to claim 1, The reinforcing material is a plasma display device made of a material containing a metal. The method of claim 1, The reinforcing material is a plasma display device made of a material containing aluminum. The method of claim 1, And the reinforcing material is arranged in the long side direction of the chassis base. The method of claim 3, And the chassis base is made of steel.

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