KR100637125B1 - Plasma display apparatus - Google Patents

Abstract

The present invention discloses a plasma display device. Plasma display device according to the invention,

A front substrate and a rear substrate disposed to face each other; A chassis base disposed at a rear of the rear substrate to support the front substrate and the rear substrate; A plurality of address electrodes disposed side by side and spaced apart from each other between the front substrate and the rear substrate, each end having a lead portion extending outward between the front substrate and the rear substrate; A plurality of discharge sustaining electrode pairs spaced apart from each other and disposed side by side between the front substrate and the rear substrate, each of which is disposed to extend in a direction orthogonal to the address electrodes; A circuit board mounted to the chassis base to apply an electrical signal to the address electrode and discharge sustain electrode pairs; A signal transmission medium connecting the circuit board and the lead portion of the address electrode so as to transfer the electrical signal, and an end portion of the side contacting the lead portion of the address electrode is bent in an 'L' shape; And a resin applied between the front substrate and the bent end of the signal transmission medium.

According to the present invention, there is an advantage that can prevent the conduction failure caused by the penetration of moisture, etc. to the plasma display panel end.

Description

Plasma display apparatus

1 is a schematic exploded perspective view of a conventional plasma display device.

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1.

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

4 is a schematic cross-sectional view taken along the line IV-IV of FIG. 3.

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

100 ... plasma display unit 111 ... front panel

112 ... Backplane 120 ... Chassis Base

130 ... circuit board 135 ... signaling medium

135a ... bend 150 ... discharge sustaining electrode pair

160 ... thermally conductive medium 170 ... address electrode

177 ... lead-out 180 ... anisotropic conductive film

190 ... resin

The present invention relates to a plasma display device, and more particularly, to a plasma display device that can prevent the conduction failure of the electrode due to the penetration of moisture or corrosion gas to the display panel end.

Plasma display device is a flat panel display that displays images by using gas discharge phenomenon. It is excellent in various display ability such as display capacity, brightness, contrast, afterimage and viewing angle, and it is possible to replace cathode ray tube with thin and large display. It is in the spotlight as the next generation flat panel display.

Such a conventional plasma display device is shown in FIGS. 1 and 2.

1 is a schematic exploded perspective view of a conventional plasma display device, and FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1.

BACKGROUND ART In general, a plasma display device is used to display an image by using a gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. have.

Such a plasma display device is shown in FIG. 1 is a schematic cross-sectional view of a plasma display device for explaining a vertical plasma display device.

1 and 2, the plasma display apparatus 1 includes a plasma display panel 10. The plasma display panel 10 includes a front substrate 11 and a rear substrate 12 disposed on the rear surface of the front substrate 11. Discharge cells separated by a partition (not shown) are formed between the front substrate 11 and the rear substrate 12, and the discharge cells are filled with discharge gas. In this discharge cell, phosphors are stacked.

Meanwhile, a plurality of address electrodes 13 are arranged side by side on the rear substrate 12, and discharge sustain electrode pairs (not shown) are arranged on the front substrate 11 in a direction crossing the address electrodes. It is. When the discharge is performed in the discharge gas between the electrodes by the voltage applied to the electrodes, the phosphor is excited by the radiation of ultraviolet light accompanying the discharge to emit light to form an image.

In addition, the plasma display apparatus 1 includes a chassis base 20 disposed substantially parallel to the plasma display panel 10 and supporting the plasma display panel 10, and the chassis base 20 At the back of the upper and lower reinforcing portion 21 and the lower reinforcing portion 22 is formed in the upper and lower portions, respectively. A heat conductive medium 60 is interposed between the plasma display panel 10 and the chassis base 20 to transfer heat generated by the plasma display panel 10 to the chassis base 20. The circuit board 30 is mounted on the opposite side (rear side) of the chassis base 20 to the attachment surface (front side) of the plasma display panel 10, and the circuit board 30 drives the plasma display panel 10. Apply an electrical signal. In order to transfer electrical signals from the circuit board 30 to the plasma display panel 10, a signal transmission medium 35 is connected to the circuit board 30 and the plasma display panel 10, respectively.

Referring to FIG. 2, in more detail, the address electrode 13 is disposed on the rear substrate 12, and at an end thereof, is exposed between the front substrate 11 and the rear substrate 12 and exposed to the outside. A lead portion 13a is provided. The lead portion 13a and the signal transmission medium 35 such as FPC (Flexible Printed Cable) are electrically connected to each other via an anisotropic conductive film called ACF (Anisotropic Conductive Film). The connection part and the part where the address electrode is exposed are coated with a resin in order to prevent penetration of moisture, corrosive gas, or the like. If the sealing is not made properly and moisture or corrosive gas penetrates into the electrode, the conduction failure occurs in the electrode.

However, in the conventional plasma display device 1, as shown in FIG. 2, the resin is not properly applied to the above-described portions, or the applied resin is spread to the side to form a thin coating thickness, thereby forming moisture or corrosive gas. There was a problem that can be infiltrated. Furthermore, since the FPC 35 has a very thin plate shape, it spreads sideways when the resin is applied, and there is also a problem that it is difficult to apply the resin above a certain thickness.

The present invention is to solve the above problems, the connection between the signal transmission medium and the address electrode and the lead portion of the address electrode is exposed to the outside to prevent moisture or corrosion gas, such as to prevent the poor conduction of the electrode. It is an object of the present invention to provide a plasma display device having an improved structure.

Plasma display device according to the present invention for achieving the above object,

A front substrate and a rear substrate disposed to face each other;

A chassis base disposed at a rear of the rear substrate to support the front substrate and the rear substrate;

A plurality of address electrodes disposed side by side and spaced apart from each other between the front substrate and the rear substrate, each end having a lead portion extending outward between the front substrate and the rear substrate;

A plurality of discharge sustaining electrode pairs spaced apart from each other and disposed side by side between the front substrate and the rear substrate, each of which is disposed to extend in a direction orthogonal to the address electrodes;

A circuit board mounted to the chassis base to apply an electrical signal to the address electrode and discharge sustain electrode pairs;

A signal transmission medium connecting the circuit board and the lead portion of the address electrode so as to transfer the electrical signal, and an end portion of the side contacting the lead portion of the address electrode is bent in an 'L' shape; And

And a resin applied between the front substrate and the bent end of the signal transmission medium.

According to the present invention, an anisotropic conductive film is further provided between the lead portion of the address electrode and the signal transmission medium to bond and electrically connect the lead portion of the address electrode to the signal transmission medium. desirable.

According to the present invention, the resin applied between the front substrate and the bent end of the signal transmission medium is preferably epoxy or silicone.

Hereinafter, with reference to the accompanying drawings, a plasma display device according to a preferred embodiment of the present invention will be described in more detail.

3 is a schematic exploded perspective view of a plasma display device according to an exemplary embodiment of the present invention, and FIG. 4 is a schematic cross-sectional view taken along line IV-IV of FIG. 3.

3 and 4, the plasma display apparatus 100 according to an exemplary embodiment of the present invention includes a front substrate 111, a rear substrate 112, an address electrode 170, and a discharge sustain electrode pair 180. And a chassis base 120, a circuit board 130, a signal transmission medium 135, and a resin 190.

The front substrate 111 and the rear substrate 112 are portions in which an image is formed and are disposed to face each other and are sealed to each other. The front substrate 111 is formed longer than the front substrate 111 in the up and down direction of the rear substrate 112, whereas the front substrate 111 is formed longer in the width direction than the rear substrate 112.

A plurality of discharge sustaining electrode pairs 150 are disposed side by side and spaced apart from each other between the front substrate 111 and the rear substrate 112, and more particularly, on the front substrate 111. The electrode pairs 150 are disposed long in a direction orthogonal to the address electrodes 170 to be described later. The discharge sustaining electrode pairs 150 are buried by the front dielectric layer 117a, and the front dielectric layer 117a is covered by the MgO protective film 118 and protected.

More specifically, a plurality of address electrodes 170 are disposed side by side on the rear substrate 112 between the front substrate 111 and the rear substrate 112, and the address electrodes 170 are disposed side by side. The discharge sustaining electrode pairs 150 are disposed to intersect with each other. Each end of the address electrodes 170 is provided with a lead portion 177 that extends outwardly from the front substrate 111 and the rear substrate 112 and is exposed to the outside. That is, as described above, each lead portion 177 of the address electrodes 170 is disposed at a portion where the rear substrate 112 extends longer in the vertical direction than the front substrate 111. The lead portions 177 are exposed to the outside. Similarly to the plurality of discharge sustaining electrode pairs 150, the address electrodes 170 are buried by the rear dielectric layer 117b, and the lead portion 177 is not buried by the rear dielectric layer 117b.

 Meanwhile, a discharge space 114 is formed between the front dielectric layer 117a and the rear dielectric layer 117b, and the discharge space 114 is a partition wall disposed between the front substrate 111 and the rear substrate 112. Formed by 113. This partition 113 also acts to prevent so-called cross-talk.

The phosphor layer 115 of red, green, and blue is coated inside the discharge space 114 partitioned by the partition wall 113 so that various colors can be realized. In addition, the discharge space 114 is filled with a discharge gas (not shown). When the discharge is performed in the discharge gas between the electrodes 150 and 170 by the voltage applied to the electrodes 150 and 170, the phosphor 115 is excited by the radiation of ultraviolet light accompanying the discharge to emit light to form an image. do.

Meanwhile, the chassis base 120 is disposed behind the rear substrate 112 to support the front substrate 111 and the rear substrate 112. Meanwhile, an upper reinforcement part 121 and a lower reinforcement part 122 formed of a metal material are formed on the rear surface of the chassis base 120 to prevent the chassis base 120 from bending.

In order to dissipate heat generated when the plasma display panel 110 is driven, a thermal conductive medium 160 made of a material having excellent thermal conductivity, such as silicon, is interposed between the chassis base 120 and the rear substrate 112.

Various electronic components are mounted on the circuit board 130 and mounted on the rear surface of the chassis base 120. The circuit board 130 is electrically connected to the plurality of discharge sustaining electrode pairs 150 and the address electrodes 170. Apply a signal.

The signal transmission medium 135 is for transmitting an electrical signal from the circuit board 130 to the address electrodes 170. In this embodiment, a flexible printed cable (FPC) is used, and both ends of the FPC are respectively. The circuit board 130 is connected to the address electrode 170. The connection structure with the address electrode 170 will be described in more detail. An end portion of the signal transmission medium 135 has an lead portion 177 of the address electrode 170 and an anisotropic conductive film 190 (ACF). It is connected via. The anisotropic conductive film 190 is mixed with nickel or nickel-plated conductive particles in a thermosetting resin, and when the anisotropic conductive film 190 is pressed and compressed, the conductive particles are in contact with each other to have conductivity. Also in the present embodiment, when the signal transmission medium 135, the anisotropic conductive film 190, and the lead portion 177 of the address electrode 170 are arranged in sequence, they are heated and pressurized to the thermosetting resin. The signal transmission medium 135 and the lead portion 177 are bonded to each other, and the conductive particles in the anisotropic conductive film 190 come into contact with each other. As a result, the address electrode 170 and the signal transmission medium 135 are electrically connected.

Meanwhile, an end portion of the both ends of the signal transmission medium 135 that contacts the lead portion 177 of the address electrode 170 is bent to have an approximately 'L' shape. In this embodiment, the end of the signal transmission medium 135 is bent approximately vertically from the rear substrate 112 to face the upper end of the front substrate 111, and thus the front substrate 111 A long space is formed between the end portion 111a and the bent portion 135a of the signal transmission medium 135.

In this way, the resin 190 (resin) is coated in the space between the end portion 111a of the front substrate 111 and the bent portion 135a of the signal transmission medium 135. The coating of the resin 190 is to prevent the inflow portion 177 of the address electrodes 170 to be exposed to the outside to penetrate the moisture or the corrosive gas. In addition, a resin 190 is also applied between the signal transmission medium 135 and the rear substrate 112 to seal the surface. In this embodiment, the resin 190 is epoxy or silicon.

In the conventional plasma display apparatus, the bent portion is not formed in the signal transmission medium and is formed in a flat shape. When the resin is applied, the resin spreads sideways, so that the resin is not formed thick but thin. As a result, moisture or corrosive gases may penetrate. . In addition, a portion in which the resin is not properly covered is formed in the lead portion of the address electrode, so that moisture or corrosive gases can penetrate. However, in the plasma display apparatus 100 according to the present invention, an end portion of the signal transmission medium 135 is bent so that a constant thickness is formed between the bent portion (bending portion 135a) and the end portion 111a of the front substrate. When the long space is formed and the resin 190 is applied to the space, the resin 190 may be prevented from spreading sideways or formed to a thin thickness as in the related art. Therefore, there is an advantage that the conduction failure of the electrode due to moisture or corrosive gas is effectively prevented. In addition, there is a side advantage that the amount of the resin 190 is applied is economical.

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

As described above, in the plasma display device according to the present invention, the resin can be thickly applied to the lead-out portion of the address electrode by bending the end portion of the signal transmission medium. There is an effect that can be effectively prevented.

Claims (3)

A front substrate and a rear substrate disposed to face each other; A chassis base disposed at a rear of the rear substrate to support the front substrate and the rear substrate; A plurality of address electrodes disposed side by side and spaced apart from each other between the front substrate and the rear substrate, each end having a lead portion extending outward between the front substrate and the rear substrate; A plurality of discharge sustaining electrode pairs spaced apart from each other and disposed side by side between the front substrate and the rear substrate, each of which is disposed to extend in a direction orthogonal to the address electrodes; A circuit board mounted to the chassis base to apply an electrical signal to the address electrode and discharge sustain electrode pairs; A signal transmission medium connecting the circuit board and the lead portion of the address electrode so as to transfer the electrical signal, and an end portion of the side contacting the lead portion of the address electrode is bent in an 'L' shape; And And a resin applied between the front substrate and the bent end of the signal transmission medium. The method of claim 1, An anisotropic conductive film interposed between the lead portion of the address electrode and the signal transmission medium to bond and electrically connect the lead portion of the address electrode to the signal transmission medium; Device. The method of claim 1, And a resin applied between the front substrate and the bent end of the signal transmission medium is epoxy or silicon.

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