KR100775847B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a panel in which an upper plate and a lower plate are bonded to form a non-display area and a display area, a front filter adhered to the panel, dummy electrodes formed on the non-display area of the upper or lower plate, and a non-display area. By starting a plasma display panel having one side connected to the front filter bonded to the other and a ground member connected to the dummy electrode on the other side, the front filter is connected to the front filter through dummy electrodes extended from the electrodes formed on the upper and lower plates. The remaining charge is to be released.

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 cross-sectional view schematically showing one side of a conventional plasma display panel.

4 is a diagram for explaining a front filter ground of a general plasma display panel.

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

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

7 is a cross-sectional view illustrating a plasma display panel according to a second 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

200: grounding member 410y, 410z: dummy electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel that emits electric charge remaining in a front filter through a dummy electrode formed in the 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 a direction crossing the scan electrode Y and the sustain electrode Z. FIG. 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 prevents light incident from the outside from being reflected back to the outside to improve the contrast of the PDP, 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.

3 is a cross-sectional view schematically illustrating one side of a conventional plasma display panel.

Referring to FIG. 3, a conventional PDP includes a panel 32 formed by joining an upper substrate 10 and a lower substrate 18, a front filter 30 installed on a front surface of the panel 32, and a panel ( 32, a printed circuit board 36 installed to be attached to the heat sink 36, a back cover 38 formed to surround the back of the PDP, and the front filter 30. And a filter support portion 40 for connecting the bag cover 38 and a support member 42 provided between the front filter 30 and the bag cover 38 so as to surround the filter support portion 40.

The printed circuit board 36 supplies a drive signal to the electrodes of the panel 32, and the panel 32 displays a predetermined image in response to the drive signal supplied from the printed circuit board 36.

The heat sink 36 dissipates heat generated from the panel 32 and the printed circuit board 36. The back cover 38 protects the panel 32 from external shocks and blocks electromagnetic waves emitted to the rear surface (hereinafter referred to as "EMI").

The filter support 40 grounds the front filter 30 to the bag cover 38 and prevents EMI from being emitted to the side. The support member 42 supports the filter support 40, the front filter 30, the bag cover 38, and the like.

The front filter 30 is electrically connected to the bag cover 38 through the filter support 40.

That is, when the panel 32 displays an image, charges are charged to the front filter 30, and even when the panel 32 does not display an image, the resistance of the EMI shielding film 56 is low so that the charged charges are not emitted. As a result, the front filter 30 must be electrically grounded.

4 is a diagram for describing a front filter ground of a general plasma display panel.

As shown in FIG. 4, the front filter 30 is electrically connected to the bag cover 38 through the support member 42. That is, the filter support 40 supporting the front filter 30 is in electrical contact with each other, and the charge accumulated in the front filter 30 through the support member 42 is discharged through the back cover 38.

In detail, the filter support 40 is connected to the rear surface of the front filter 30 at one end of the front filter 30. In this case, the filter support 40 electrically connects at least one of the EMI shielding film 56 and the NIR shielding film 58 to the back cover 38 to shield EMI and / or NIR.

However, since the front filter 30 of the general plasma display panel is manufactured in a film form, the front surface of the plasma display panel may be formed by using an adhesive rather than forming a supporting member 42 for electrically grounding while supporting the front filter 30. It is effective to glue the filter 30 onto the panel 32.

Therefore, a method of fixing the front filter 30 on the panel 32 and electrically grounding it without forming a support member 42 for electrically grounding while supporting the front filter 30 is provided. It must be sought.

Accordingly, an object of the present invention is to provide a plasma display panel which effectively grounds the front filter in order to discharge electric charges in the front filter for shielding electromagnetic waves.

In order to achieve the above object, a plasma display panel according to an aspect of the present invention includes a panel including a dummy electrode disposed to correspond to the non-display area, forming a non-display area and a display area, and adhered to the panel. And a ground member connected to one side of the front filter portion adhered to the non-display area and the other side to the dummy electrode.

The panel includes a plurality of dummy electrodes, and the grounding member is connected to a predetermined number of electrodes among the dummy electrodes.

In addition, the dummy electrodes according to the present invention may include at least one of a first dummy electrode corresponding to the scan electrode Y, a second dummy electrode corresponding to the sustain electrode Z, or a third dummy electrode corresponding to the address electrode X. Characterized in that it is one dummy electrode, it is characterized in that it is connected to at least one dummy electrode of each dummy electrode.

In addition, the grounding member according to the present invention is a conduction tape, a conductive metal is included, and has an electrical property of 0.1 to 100 ohms (Ω).

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 5 and 7 attached to a preferred embodiment of the present invention will be described in detail.

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

As illustrated in FIG. 5, the front filter 100 is formed on a panel 320 in which a display area in which an image is displayed and a non-display area are formed.

The panel 320 is formed by bonding the upper plate 170 on which the scan electrode Y and the sustain electrode Z are formed, and the lower plate 180 on which the address electrode X is formed.

A dummy electrode 410x corresponding to the address electrode X is formed on the non-display area.

Among the dummy electrodes formed on the non-display area, a ground member 200 for electrically connecting the dummy electrode 410x of the address electrode X and the front filter 100 is formed.

The ground member 200 is in contact with the front filter 100 on the non-display area so that the charge remaining in the front filter 100 is discharged through the dummy electrode 410x, and the other area is connected to the dummy electrode 410x. Contact.

In addition, the grounding member 330 may include a conductive metal such as silver (Ag) or copper (Cu) to use a material having electrical characteristics of 0.1 to 1000 ohms (Ω). For example, conduction Conduction tape can be used.

Meanwhile, the front filter 100 and the predetermined number of electrodes among the dummy electrodes 410x on the non-display area are electrically connected to each other through the plurality of ground members 200, or the width of the ground member 200 is changed to the front filter ( The front filter 100 may be electrically connected to all the dummy electrodes 410x by forming a width similar to the width of 100.

That is, the front filter 100 is adhered to the upper surface of the panel 320 through an adhesive layer, and discharges charge accumulated while shielding EMI and NIR to the dummy electrode 410x through the ground member 200.

6 is a diagram illustrating a front filter according to a preferred embodiment of the present invention.

As shown in FIG. 6, 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 antireflective film 110 is formed on the surface of the film type front filter 100 to prevent the light incident from the outside from being 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.

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

As shown in FIG. 7, the front filter 100 is electrically connected to the dummy electrode 410x of the address electrode X formed on the non-display area through the first ground member 200 and the address electrode ( It is electrically connected with the dummy electrode 410x of X) via the 2nd ground member 200 '.

For example, in order to divide the panel 320 into each other and shorten the address period to 1/2, the double scan method for driving the scan electrode Y / hold electrode Z and the address electrode X up and down separately. In the case of driving the panel 320, it is preferable to electrically connect the dummy electrode 410x ′ of the address electrode X with the front filter 100 to release charges remaining in the front filter 100.

Meanwhile, the front filter 100 on both side non-display areas is electrically connected to a predetermined number of dummy electrodes among the dummy electrodes 410x and 410x 'through the plurality of first and second ground members 200 and 200'. Alternatively, the widths of the first and second ground members 200 and 200 'may be electrically connected to all the dummy electrodes 410x and 410x'.

In addition, the front filter 100 may be electrically connected to the sustain electrode Z and the dummy electrode corresponding to the scan electrode Y through the ground member 200.

That is, at least one front filter 100 corresponding to each electrode (Y, Z, X) according to an electrical signal input through each electrode (Y, Z, X) to display an image on the panel (320). It is preferable to electrically connect with the dummy electrode of to discharge the electric charge remaining on the front filter 100.

As described above, in the plasma display panel according to the present invention, by electrically connecting the dummy electrode and the front surface filter, the charge accumulated in the front surface filter can be released without forming a separate charge releasing means.

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 (6)

A panel including a non-display area and a display area, the panel including a dummy electrode disposed to correspond to the non-display area; A front filter adhered to the panel; And a ground member connected at one side to the front filter portion bonded to the non-display area and at the other side to the dummy electrode. The method of claim 1, The panel includes a plurality of dummy electrodes, And the grounding member is connected to a predetermined number of electrodes of the dummy electrodes. The method according to claim 1 or 2, The panel includes a scan electrode (Y), a sustain electrode (Z) and an address electrode (X), The dummy electrodes, And at least one dummy electrode among a first dummy electrode corresponding to the scan electrode (Y), a second dummy electrode corresponding to the sustain electrode (Z), and a third dummy electrode corresponding to the address electrode (X). The method of claim 3, wherein The panel includes a plurality of dummy electrodes, The ground member, And at least one dummy electrode among the dummy electrodes. The method according to claim 1 or 2, The grounding member includes a conduction tape. The method of claim 5, The conduction tape, A plasma display panel including a conductive metal and having electrical characteristics of 0.1 to 100 ohms.

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