KR20060073369A - Plasma display panel - Google Patents

Abstract

The present invention relates to a panel in which an upper plate and a lower plate are joined to form a non-display area and a display area, a film-type filter positioned on the front side of the panel, a heat sink positioned on the rear side of the panel, and one side of the front filter The present invention provides a plasma display panel including a ground member connected to the plate and connected to the other side of the plate, thereby releasing electric charges charged to the front filter in a quality inspection process before shipping the panel product.

Description

Plasma Display Panel             

1 is a perspective view showing a discharge cell structure of a conventional plasma display panel.

2 is a view for explaining a front filter of a conventional plasma display panel.

3 is a front view for explaining a plasma display panel according to a first embodiment of the present invention.

4 is a side view of the plasma display panel shown in FIG. 3;

5 is a view for explaining a front filter according to a preferred embodiment of the present invention.

6 is a cross-sectional view illustrating a plasma display panel according to a second preferred embodiment of the present invention.

7A-7C illustrate that the front filter is grounded according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 12Y, 12Z: transparent electrode

13Y, 13Z: bus electrode 14: dielectric layer                 

16: protective film 18: lower substrate

24: partition 26: phosphor layer

30,100 Front filter 32, 320 Panel

36: heat sink 36: printed circuit board

38: back cover 42: support member

400: ground forceps 410: fixed bar

420: ground bar 510: heat dissipation sheet

520: heat sink 530: jig

The present invention relates to a plasma display panel, and more particularly, to discharge the charge charged to the front filter during the quality inspection process before shipping the product of the plasma display panel, and to support the panel not to escape from the inspection process. The present invention relates to a plasma display panel.

Plasma Display Panels (hereinafter referred to as "PDPs") are characterized by emitting phosphors by 147 nm ultraviolet rays generated during discharge of an inert mixed gas such as He + Xe, Ne + Xe or He + Ne + Xe. An image containing graphics is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

1 is a perspective view illustrating a discharge cell structure of a conventional plasma display panel.

Referring to FIG. 1, a discharge cell of a three-electrode AC surface discharge type PDP includes a scan electrode Y and a sustain electrode Z formed on the upper substrate 10, and an address electrode formed on the lower substrate 18. X). Each of the scan electrode Y and the sustain electrode Z has a line width smaller than the line widths of the transparent electrodes 12Y and 12Z and the transparent electrodes 12Y and 12Z and is formed at one edge of the transparent electrode 13Y, 13Z).

The transparent electrodes 12Y and 12Y are usually formed on the upper substrate 10 by indium tin oxide (ITO). The metal bus electrodes 13Y and 13Z are usually formed of metals such as chromium (Cr) and formed on the transparent electrodes 12Y and 12Z to reduce voltage drop caused by the transparent electrodes 12Y and 12Z having high resistance.

The upper dielectric layer 14 and the passivation layer 16 are stacked on the upper substrate 10 having the scan electrode Y and the sustain electrode Z side by side. In the upper dielectric layer 14, wall charges generated during plasma discharge are accumulated. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.                         

The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the address electrode X is formed, and the phosphor layer 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The address electrode X is formed in the direction crossing the scan electrode Y and the sustain electrode Z. The partition wall 24 is formed in a stripe or lattice shape to prevent the ultraviolet rays and the visible light generated by the discharge from leaking to the adjacent discharge cells.

The phosphor layer 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red (R), green (G), and blue (B). Inert mixed gas is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

In the PDP, the front filter is installed on the upper substrate 10 to shield electromagnetic waves and prevent reflection of external light.

2 is a diagram illustrating a front filter of a conventional plasma display panel.

As shown in FIG. 2, the front filter 30 may include an antireflection film 50, an optical film 52, a glass 54, an electromagnetic shield (“EMI”) shielding film 56, and A near infrared (NIR) shielding film 58 is provided. An adhesive layer is formed between the films 50, 52, 54, 56, and 58 of the front filter 30 to bond the films 50, 52, 54, 56, and 58.

The optical film 52 is formed by inserting a specific material into the adhesive layer. For convenience of description, the adhesive layer is not illustrated, and the optical film 52 is represented as a specific layer, and the structure of the front filter 30 which is generally used is exemplified.                         

The antireflection coating 50 improves the contrast of the PDP by preventing the light incident from the outside from being reflected back to the outside, and is formed on the surface of the front filter 30. In addition, the antireflection film 50 may be further formed on the rear surface of the front filter 30.

The optical characteristic film 52 adjusts the color temperature of the light incident from the panel 32 to improve the optical characteristics of the PDP.

The glass 54 supports the front filter 30 to prevent the front filter 30 from being damaged from an external impact. The EMI shielding film 56 shields the EMI to prevent the EMI incident from the panel 32 from being emitted to the outside. The NIR shielding film 58 shields the NIR radiated from the panel 32 to prevent the above-mentioned NIR from being emitted to the outside. The EMI shielding film 56 and the NIR shielding film 58 may be composed of one layer.

The plasma display panel is bonded after the upper substrate 10 and the lower substrate 18 are manufactured separately.

In addition, after the front filter 32 and the heat dissipation sheet (not shown) and the heat sink (not shown) for dissipating heat generated from the panel 32 are manufactured, the front filter 30 is formed on the front surface of the panel 32. ) To fix the heat dissipation sheet and the heat dissipation plate on the rear surface of the panel 32 to manufacture the plasma display panel, and then inspect the product before shipping the product.

That is, after inspecting the product quality and defects of the plasma display panel, the product should be shipped to ensure the product quality of the plasma display panel delivered to consumers.

In this inspection process, the front filter 30, the heat dissipation sheet, the heat sink, and other modules are combined on the panel 32 before the plasma display panel is generated.

Therefore, in order to inspect the quality of the plasma display panel, a method of electrically grounding the front filter 30 while looking at the front filter 30, the panel 32, the heat dissipation sheet, and the heat sink must be sought.

Accordingly, it is an object of the present invention to provide a plasma display panel that releases charges charged to the front filter during a quality inspection process before shipping products of the plasma display panel, and supports the panel so as not to leave the inspection process. Is in.

In order to achieve the above object, a plasma display panel according to an aspect of the present invention includes a panel in which an upper plate and a lower plate are joined to form a non-display area and a display area, a filter in the form of a film positioned on a front surface of the panel, And a heat sink disposed on a rear surface of the ground member and electrically connecting one side of the front filter and one side of the heat sink.

The grounding member according to the present invention is characterized in that the panel, the filter and the heat sink are fixed with a predetermined supporting force.                     

In addition, the filter according to the present invention is characterized in that the ground plane connected to the ground member is formed on the electromagnetic shielding film or the near-infrared shielding film.

In addition, it characterized in that it further comprises a heat dissipation sheet for transferring the heat generated in the panel according to the invention to the heat sink.

On the other hand, the grounding member according to the present invention is characterized in that the one axis is in contact with the filter on the non-display area, the other axis is tongs in contact with the heat sink.

In addition, the grounding member according to the present invention includes a fixing bar extending in a vertical direction on at least one ear portion of the plate, and having at least one grounding bar on which one side contacts the filter on the non-display area and the other side is coupled to the fixing bar. It features.

In addition, the grounding member according to the present invention includes a fixing bar extending in a vertical direction on at least one ear portion of the jig for aligning the panel, the filter and the heat sink, one side of the filter on the non-display area is in contact, and the other side is coupled to the fixing bar. It characterized in that it comprises at least one ground bar.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, with reference to Figures 4 and 7 attached to a preferred embodiment of the present invention will be described in detail.

3 is a front view illustrating a plasma display panel according to a first exemplary embodiment of the present invention, and FIG. 4 is a side view of the plasma display panel shown in FIG.

3 and 4, a display area and a non-display area where an image is displayed are formed on the panel 320, and the front filter 100 is overlapped on a predetermined area of the display area and the non-display area.

The panel 320 is formed by bonding the scan electrode Y, the sustain electrode Z, the upper plate formed with the upper dielectric layer and the passivation layer, the address electrode X, the lower dielectric layer, and the lower plate 180 formed with the partition wall.

In addition, the front filter 100 overlaps the front surface of the panel 320, and the heat transfer sheet 510 and the heat dissipation sheet 510 transfer heat generated from the panel 320 to the heat sink 510 on the rear surface. The heat sinks 520 for radiating the heat generated are sequentially stacked.

Ground tweezers 400 having one side electrically connected to the front filter 100 on the non-display area formed on the front surface of the panel 320 and the other side electrically connected to the heat sink 520 superimposed on the rear surface of the panel 320. Is provided.

The ground tongs 400 are formed of a highly conductive metal and have a predetermined elasticity. The grounding tongs 400 are electrically connected to the heat sink 520 so that the charge remaining on the front filter 100 is discharged to the heat sink 520, and the front filter The support 100 is fixed to the panel 320, the heat dissipation sheet 510, and the heat dissipation plate 520.

That is, in order to inspect the quality of the plasma display panel, the ground tongs 400 support the front filter 100, the panel 320, the heat dissipation sheet 510, and the heat sink 520 to be fixed, and the front filter ( Charge charged in the 100 is to be discharged to the heat sink (520).

Meanwhile, a plurality of ground tongs 400 may be electrically connected to the front filter 100 corresponding to at least one side of the panel 320, and the other side thereof may be electrically connected to at least one side of the heat sink 520. Can be.

The heat dissipation sheet 510 is formed of a material having high thermal conductivity so that heat generated from the panel 320 can be transferred to the heat dissipation plate 520, and the heat dissipation plate 520 awaits heat transferred through the heat dissipation sheet 510. It is formed of a metal material that can dissipate into the middle.

Then, the heat sink 520 is grounded so that the remaining charge is discharged to the front filter 100 that is electrically connected through the ground tongs (400).

5 is a view for explaining a front filter according to an embodiment of the present invention.

As shown in FIG. 5, the film type front filter 100 includes an anti-reflective film 110, an optical characteristic film 120, an EMI shielding film 130, and near infrared (NIR). The shielding film 140 is provided.

An adhesive layer is formed between the films 110, 120, 130, and 140 of the film type front filter 100 to bond the films 110, 120, 130, and 140. The optical film 120 is formed by inserting a specific material into the adhesive layer. In the detailed description of the present invention, the adhesive layer for adhering the films 110, 120, 130, and 140 is not illustrated, and the optical characteristic film 120 is represented as a specific layer.

The antireflection film 110 is formed on the surface of the film type front filter 100 to prevent the light incident from the outside is reflected back to the outside. The antireflective film 110 may be further formed on the rear surface of the film type front filter 100.

The optical characteristic film 120 adjusts the color temperature of the light incident from the panel 100 to improve the optical characteristics of the plasma display panel.

The EMI shielding film 130 shields electromagnetic waves (hereinafter referred to as “EMI”) to prevent the EMI incident from the panel 100 from being emitted to the outside.

The NIR shielding layer 140 shields the NIR incident from the panel 100. Meanwhile, the EMI shielding layer 130 and the NIR shielding layer 140 may be formed of one layer.

As shown in FIG. 5, the EMI shielding film 130 or the NIR shielding film 140 in which the charge is charged may be electrically connected directly to one side of the ground tongs 400.

That is, at least one side of the EMI shielding film 130 or the NIR shielding film 140 is formed to be smaller than the anti-reflective film 110 and the optical characteristic film 120 by a predetermined size, so that one side of the grounding clamp 400 is the EMI shielding film 130. ) Or the NIR shielding film 140.

6 is a cross-sectional view for describing a plasma display panel according to a second exemplary embodiment of the present invention.

As shown in FIG. 6, the front filter 100 overlaps the front surface of the panel 320, and a heat dissipation sheet (not shown) and heat dissipation that transfer heat generated from the panel 320 to the heat sink 510 on the rear surface. The heat sinks 520 for radiating heat transferred through the sheets overlap each other.

A fixing bar 410 is formed at an ear portion of at least one side of the heat sink 530.

The first side of the connection bar 420 is electrically connected to the front filter 100 on the non-display area, and the second side is coupled with the fixed bar 410.

That is, a hole coupled to the fixing bar 410 is provided on the second side of the connection bar 420, and the hole on the second side is fitted into the fixing bar 410 to be fixed.

The jig 530 is formed on the rear surface of the heat sink 520. That is, the heat dissipation plate 520, the heat dissipation sheet, the panel 320, and the front filter 100 are sequentially arranged on the upper surface of the jig 530 for aligning the panel 320, the heat dissipation sheet, and the heat dissipation plate 520.

In order to inspect the quality of the plasma display panel, after the heat sink 520, the heat radiation sheet, the panel 320, and the front filter 100 are sequentially aligned on the jig 530, the second side of the connection bar 420 may be placed on the jig 530. The hole formed in the fitting bar is fixedly coupled to the fixing bar 410 formed on one side of the heat sink 520, and the first side is brought into contact with the front filter 100 on the non-display area.

The connection bar 420 is preferably formed of a metal material having a predetermined conductivity so that electric charges charged to the front filter 100 can be discharged to the heat sink 520 during the inspection process.

In addition, the connection bar 420 may provide a predetermined supporting force to the heat dissipation plate 520, the heat dissipation sheet, the panel 320, and the front filter 100 to prevent the plasma display panel from being separated during the quality inspection process.                     

7A to 7C are diagrams illustrating that the front filter is grounded according to a preferred embodiment of the present invention.

As shown in FIG. 7A, one side of the grounding forceps 400 contacting the front filter 100 or the first side of the grounding bar 420 may be formed in a rod shape.

As shown in FIG. 7B, the first side of one side or the ground bar 420 of the grounding forceps 400 contacting the front filter 100 may be bent.

In addition, as illustrated in FIG. 7C, a relief member 430 is formed on the ground surface to prevent breakage / damage due to the ground tong 400 or the ground bar 420 to which the front filter 100 is in contact. The first side of the bent ground tongs 400 or the ground bar 420 may be in contact with the cushion member 430.

At this time, the cushion member 430 is conductive to discharge the charge, and in order to prevent the front filter 100 from being damaged / damaged as one side of the ground tongs 400 or the folding bar 420 is contacted. It is desirable to have a predetermined cushion.

As described above, when the fixing bar 410 is formed on the heat sink 520, and the front filter 100 and the heat sink 520 are electrically connected through the connection bar 420, as illustrated in FIG. 5. Likewise, at least one side of the EMI shielding film 130 or the NIR shielding film 140 is formed to be smaller than the antireflective film 110 and the optical characteristic film 120 by a predetermined size, and the first side of the connection bar 420 is the EMI shielding film. 130 may be in direct contact with the NIR shielding layer 140.

That is, the ground plane of the front filter 100 to which one side of the ground tong 400 described in FIG. 4 or the first side of the ground bar 420 described in FIG. 6 is in contact may be an EMI shielding film 130 or an NIR shielding film ( 140).

As described above, the plasma display panel according to the present invention may emit charges charged to the front filter during the quality inspection process before shipping the product.

In addition, the front filter, the panel, the heat dissipation sheet, and the heat sink may be prevented from being separated during the quality inspection process.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (8)

A panel where the top and bottom plates are joined to form a non-display area and a display area, A membrane-shaped filter positioned on the front surface of the panel; A heat sink disposed on a rear surface of the panel; And a ground member electrically connecting one side of the front filter and one side of the heat sink. The method of claim 1, The ground member, Plasma display panel, characterized in that for fixing the panel, the filter and the heat sink with a predetermined supporting force. The method of claim 1, The filter, A plasma display panel comprising at least one film including an antireflection film, an optical characteristic film, an electromagnetic wave shielding film, or a near infrared ray shielding film. The method of claim 3, wherein The filter, And a ground plane connected to the ground member on the electromagnetic shielding film or the near-infrared shielding film. The method of claim 1, And a heat dissipation sheet for transferring heat generated from the panel to the heat dissipation plate. The method of claim 1, The ground member, And one axis of the tongs contacting the filter on the non-display area, and the other axis of the forceps to be in contact with the heat sink. The method of claim 1, The ground member, A fixing bar extending in a vertical direction on at least one ear portion of the heat sink; And at least one ground bar in contact with one side of the filter on the non-display area and the other side coupled to the fixed bar. The method of claim 1, The ground member, A fixing bar extending in a vertical direction on at least one ear portion of the jig for aligning the panel, the filter and the heat sink; And at least one ground bar in contact with one side of the filter on the non-display area and the other side coupled to the fixed bar.

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