KR100625990B1 - Plasma display device - Google Patents

Abstract

According to the present invention, a plasma display device is disclosed. The plasma display apparatus includes a plasma display panel on which an image is embodied, and a chassis base disposed to face the plasma display panel, wherein the chassis base includes a metal base composite material including a reinforcing material in a metal base. , Metal Matrix Composite). According to the disclosed plasma display apparatus, damage to a panel provided with a glass material can be prevented.

Description

Plasma display device

1 is an exploded perspective view illustrating a plasma display panel;

2 is a view illustrating a coupling relationship between a plasma display panel and a chassis base;

3 is a view showing a bending deformation state of a conventional plasma display device;

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

<Description of the symbols for the main parts of the drawings>

10 ... first panel 20 ... second panel

30 ... plasma display panel 50 ... heat-resistant sheet

60 ... chassis base 70 ... circuit

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 having an improved structure in which damage to a plasma display panel is prevented.

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

The plasma display apparatus is an image display unit in which an image is implemented, and includes a plasma display panel.

1 is an exploded perspective view illustrating the plasma display panel 130. Referring to the drawings, the plasma display panel 130 is provided by bonding the first panel 110 and the second panel 120 to each other.

The first panel 110 includes a first substrate 111, a plurality of discharge sustain electrodes 112 formed of a pair of scan electrodes and sustain electrodes formed on the first substrate 1111, and the discharge sustain electrodes 112. ) And a first dielectric layer 114 formed on the first substrate 111 so that the discharge sustaining electrode 112 and the bus electrode 113 are buried. The protective layer 115 is provided on the first dielectric layer 114.

The second panel 120 includes a plurality of address electrodes 122 formed on the second substrate 121, a second dielectric layer 123 covering the address electrode 122, and a partition on the second dielectric layer 123. And a fluorescent layer 125 formed over the side of 124.

Meanwhile, as shown in FIG. 2, the plasma display panel 130 where discharge is performed is coupled to the chassis base 160 via the face tape 140 and the heat dissipation sheet 150. Heat generated in the panel 130 is conducted to the chassis base 160. Therefore, while driving the device, a large amount of heat is accumulated in the panel 130 and the chassis base 160 coupled thereto, which causes thermal deformation.

According to the prior art, the chassis base is made of aluminum, which means that the display panel 130 having a thermal expansion coefficient of about 8.5 μm / m ° C and a glass having a thermal expansion coefficient of about 23.8 μm / m ° C Chassis base 160 is made of a material due to the difference in the degree of thermal expansion, as shown in Figure 3, the bending deformation occurs.

For example, after the panel 130 and the chassis base 160 are coupled at room temperature (25 ° C.), when the temperature is raised to 80 ° C. due to the operation of the device, the movement amount e of the curved portion of the panel 130 is It is about 4mm backwards.

However, due to such bending deformation, stress is generated in the panel 130, and problems such as cracking or damage of the panel 130 provided with glass material or damage to an internal structure, for example, the partition wall 124, may occur. do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and other problems, and an object thereof is to provide a plasma display device having an improved structure in which damage to a panel is prevented.

In order to achieve the above object, the plasma display device of the present invention,

A plasma display apparatus including a plasma display panel on which an image is implemented and a chassis base disposed to face the plasma display panel.

The chassis base is characterized by being provided with a metal base composite material (MMC, Metal Matrix Composite) containing a reinforcing material in the metal base.

Here, the metal base may be one metal selected from a group of metals consisting of Al, Cu, and Mg, and the reinforcing material may be one selected from a group of reinforcing materials including Si, Al 2 O 3, SiC, Carbon, Graphite, and B 4 C. It may be a reinforcement.

In particular, the metal base may be provided with Al, and the reinforcing material may be provided with Si.

On the other hand, the content ratio of the reinforcing material is preferably 50% to 80%.

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

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

Referring to the drawings, the plasma display apparatus includes a plasma display panel 30 on which an image is implemented, a chassis base 60 disposed on a rear surface of the panel 30, and interposed between the panel 30 and the chassis base 60. The heat dissipation sheet 50 is provided. In addition, a circuit unit 70 for driving the panel 30 is provided on the rear surface of the chassis base 60.

The display panel 30, in which the first panel 10 and the second panel 20 are bonded to each other, is an image display unit in which an image is realized by using a discharge phenomenon.

The chassis base 60 serves as a heat sink of the panel 30. To this end, the chassis base 60 is interposed between the panel 30 and the chassis base 60 via a heat dissipation sheet 50. Allow heat to conduct to chassis base 60.

In addition, the chassis base 60 also serves as a supporting structure of the panel 30 provided with a glass material.

Referring to the drawing, a circuit unit 70 for driving the panel 30 is installed on the rear surface of the chassis base 60, and the circuit unit 70 supplies a controlled signal and driving power to the panel 30 electrode. And a circuit board on which various circuit elements are mounted.

In the plasma display device configured as described above, according to an aspect of the present invention, the chassis base 60 is provided with a metal matrix composite (MMC).

Metal base composites are a kind of composite materials with advantages such as high rigidity and excellent high temperature characteristics.

The chassis base 60 may be provided in the form of a silicon aluminum alloy containing silicon (Si) on the metal base composite material, for example, aluminum (Al) base.

As described above, the thermal expansion coefficient aberration of the panel 30 and the chassis base 60 causes damage to the panel 30. Thus, when the chassis base 60 having a thermal expansion coefficient similar to that of glass is provided, the panel 30 This can be effectively protected.

Table 1 shows the change of the coefficient of thermal expansion according to the aluminum-silicon content of the silicon aluminum alloy.

Al Si Coefficient of thermal expansion 50% 50% 10.3μm / m ℃ 40% 60% 8.3μm / m ℃ 30% 70% 7.8μm / m ℃

Referring to the table, it can be seen that the coefficient of thermal expansion decreases as the content of silicon in the aluminum matrix increases. Considering that the thermal expansion coefficient of the glass is about 8.5 μm / m ° C from these experimental results, if the silicon content ratio of the chassis base 60 is maintained at 50% to 80% to have a similar thermal expansion coefficient, panel damage may be prevented. Can be.

As the material of the chassis base 60, other metal base composite materials other than silicon aluminum alloy may also be used.

As such a composite material, for example, a metal base composite material impregnated with a continuous or cut reinforcing fiber in the metal base may be adopted. Here, Al, Cu, Mg, etc. may be used as the metal base, and Al 2 O 3, SiC, Carbon, Graphite, or the like may be used as the reinforcing fiber.

In addition, the chassis base 60 may be provided as a composite material in which fine particles are dispersed in a metal base, wherein the metal base may be Al, Cu, Mg, or the like, Al2O3, SiC, Graphite, B4C and the like can be used.

According to the plasma display device of the present invention, the chassis base is provided with a metal matrix composite (MMC). The metal-based composite material has high rigidity and excellent high temperature characteristics. In particular, the metal base composite material can adjust its thermal expansion coefficient by adjusting the content of the reinforcing material contained in the metal base. Therefore, when the content of the reinforcing material is adjusted to have a thermal expansion coefficient similar to that of the glass panel, the bending deformation due to the difference in thermal expansion of the panel and the chassis base can be prevented, thereby reducing or eliminating the stress of the panel. Can be.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it is merely exemplary, and various modifications and equivalent other embodiments are possible from those skilled in the art to which the present invention pertains. You will understand the point. Therefore, the true scope of protection of the present invention should be defined by the appended claims.

Claims (5)

A plasma display apparatus including a plasma display panel on which an image is implemented and a chassis base disposed to face the plasma display panel. The chassis base is provided with a metal matrix composite (MMC, Metal Matrix Composite) containing a reinforcing material in the metal base, the metal base is made of Al, the reinforcing material is made of Si, the content ratio of the reinforcing material is 50 Plasma display device, characterized in that the% to 70%. delete delete delete delete

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