KR100667541B1 - Data Electrode Structure for Plasma Display Panel - Google Patents

Abstract

The present invention relates to a data electrode structure of a plasma display panel which can reduce a short circuit phenomenon caused by silver (Ag) diffusion phenomenon or the like.

As described above, the present invention provides a plasma display panel having electrode pads of a plurality of data electrodes, wherein the electrode pads are arranged in different directions with respect to the display area of the plasma display panel.

Plasma Display Panel, Electrode Pad, Data Electrode, Pitch

Description

Data Electrode Structure for Plasma Display Panel

1 is a perspective view schematically showing a device structure of a conventional plasma display panel.

2 is a front view illustrating a data electrode pad structure of a conventional plasma display panel.

3 is a front view showing the structure of a driving circuit of a conventional plasma display panel.

4 is a front view showing a data electrode structure of the plasma display panel according to the first embodiment of the present invention.

5 is a front view showing a data electrode structure of the plasma display panel according to the second embodiment of the present invention.

6 is a front view showing a data electrode structure of the plasma display panel according to the third embodiment of the present invention.

7 is a front view showing a data electrode structure of the plasma display panel according to the fourth embodiment of the present invention.

8 is a front view showing a data electrode structure of the plasma display panel according to the fifth embodiment of the present invention.

***** Explanation of symbols for the main parts of the drawing *****

10: lower substrate 20: data electrode

22: electrode pad 30: electrode group

40: connector C: display area

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, by dividing electrode pads on the upper and lower sides of a display area of a plasma display panel to increase the pitch between the electrode pads. The present invention relates to a data electrode structure of a plasma display panel capable of reducing a short circuit phenomenon.

Plasma Display Panels (hereinafter referred to as PDPs) and liquid crystal displays (LCDs) are spotlighted as next generation display devices having the highest practicality among flat panel display devices. In particular, PDP has a higher luminance and wider viewing angle than a liquid crystal display device, and thus has wide applicability as a large, thin display such as an outdoor advertising tower, wall TV, or theater display. Unlike the CRT (Cathod Ray Tube) CRT, the PDP emits a phosphor formed in each discharge cell to display an image.

1 is a perspective view schematically showing a device structure of a conventional plasma display panel.

Referring to FIG. 1, in the PDP, a front glass substrate (upper substrate 100), which is a display surface on which an image is displayed, and a rear glass substrate (lower substrate 200) forming a rear surface are coupled in parallel with a predetermined distance therebetween.

The front glass substrate 100 is formed side by side on the substrate 100 so as to maintain the light emission of the cells by mutual discharge in one pixel, scan electrodes and sustain electrodes 111 and 112, that is, transparent indium thin oxide (ITO) The transparent electrode 110 formed of a material and the bus electrodes 111a and 112a formed of a metal material are disposed at edges of the transparent electrode 110.

In addition, the transparent electrode 110 and the bus electrode form a wall charge, maintain the discharge by the discharge holding voltage, protect the electrode from ion shock during plasma discharge, and by the upper dielectric layer 120 serving as a diffusion barrier film. A protective layer 130 is formed on the top surface of the upper dielectric layer 120 to which magnesium oxide (MgO) is deposited to facilitate emission of secondary electrons.

In the rear glass substrate 200, one or more discharge spaces, that is, a plurality of barrier ribs 210 for forming a cell are arranged in parallel with each other, and generate a vacuum ultraviolet ray by performing an address discharge at a portion crossing the transparent electrode 110. The lower electrode layer 230 is disposed on the upper surface of the rear glass substrate 200 in a direction parallel to the partition wall 210, and is stacked on the rear glass substrate 200 to cover the data electrode 220. ).

The partition wall 210 blocks electrical and optical interference between neighboring cells and supports the front and rear glass substrates 100 and 200. In addition, a lower dielectric layer 230 is formed on an upper surface of the data electrode 220, and an upper surface of the lower dielectric layer 230 is coated with R, G, and B phosphor layers 240 that emit visible light for image display during address discharge. It is formed.

The front glass substrate 100 and the rear glass substrate 200 are plasticized and bonded by a sealing material, for example, frit glass, by a sealing process, and then an exhaust process for removing impurities in the panel is performed. do.

After the exhaust process, an inert gas such as helium (He), neon (Ne), xenon (Xe), or the like is injected into the PDP in order to increase discharge efficiency during plasma discharge.

A conventional discharge having such a structure is an address discharge between the data electrode 220 of the rear glass substrate 200 and the transparent electrode 110 of the front glass substrate 100, followed by a continuous display discharge for the selected cell.

That is, the electrons present in the discharge cell accelerate to the negative electrode (-) by the applied driving voltage, and collide with the inert gas filled in the discharge cell to excite the inert gas to generate ultraviolet rays. A desired image is obtained by colliding with the phosphor 240 surrounding the data electrode 220 and the partition wall 210 to emit visible light.

In addition, an electrode pad 222 is disposed to receive a signal from an external driving circuit in the wiring of the transparent electrode 110 and the data electrode 220.

2 is a front view illustrating a data electrode pad structure of a conventional plasma display panel, and FIG. 3 is a front view illustrating a structure of a driving circuit of a conventional plasma display panel.

The electrode pad 222 is a portion of the display area (light emitting area) of the PDP that is exposed to the outside for connection with an external circuit and is extended to the electrode, and is generally formed of a metal having a very low resistance. It is usually formed of silver (Ag) having a lower cost than Au).

The driving pads provided on the electrode pad 222 and the PDP substrate 300 are connected by the connector 250 to apply a signal to the transparent electrode 110 and the data electrode 220.

However, since the electrode pad 222 is exposed to external air between the display area C and the connector 250, the electrode becomes unstable due to reaction with external air when the PDP is operated.

Taking silver (Ag) as the electrode pad 222 as an example, the reaction mechanism between the electrode pad 222 and the outside air is ionized of silver (Ag)-external air inflow-potential difference-electrolytic movement-precipitation of silver (Ag)- This happens in the order of the electrode shorts.

That is, since the interval between the electrode pads 222 made of silver is narrow, when a voltage is applied to the electrode pads 222 during the PDP driving, an electric field due to a potential difference is applied between the electrode pads 222. Due to the electric field, silver (Ag) causes chemical reactions (oxidation reactions) with moisture or impurities in the air, thereby causing electrolytic migration.

As a result, ions combined with silver (Ag) are bonded to the electrode pad 222, and the ions react with the pad to cause silver (Ag) to precipitate on the electrode pad 222. The gap between the electrode pads 222 is gradually reduced, resulting in diffusion of silver (Ag), which short-circuits the electrode.

As described above, when silver (Ag) diffusion occurs, the electrode pads 222 of the electrodes of the PDP are short-circuited with the electrode pads 222 adjacent to each other, and when the silver (Ag) reacts with moisture, the PDP may break down. There is.

However, recent PDPs are increasingly demanding high resolution. Accordingly, in order to place more electrodes in the same space, the spacing between the electrodes is reduced. For example, in the case of 40 to 50 inches, the pitch of the data electrode pad 222 should be 0.15 mm or less in order to realize full HD. You have to design.

As the distance between the data electrodes 220 decreases, the adjacent electrode pads 222 may be shorted more easily due to the diffusion of silver (Ag), thereby directly affecting the lifetime or quality of the PDP.

Accordingly, the present invention is to solve the above problems, by dividing the electrode pads on the upper and lower sides of the outside of the display area of the plasma display panel to increase the interval pitch between the electrode pads to reduce the short circuit phenomenon due to silver diffusion phenomenon, etc. It is to provide a data electrode structure of the plasma display panel that can extend the life of the plasma display panel.

The present invention for achieving the above object is a plasma display panel having an electrode pad of a plurality of data electrodes, the electrode pad is characterized in that arranged in different directions with respect to the display area of the plasma display panel. .

Accordingly, the data electrodes are divided into a plurality of electrode groups, and the electrode pads of the electrode groups are alternately arranged.

In addition, the electrode pads are configured to be arranged above and below the display area of the plasma display panel.

Here, the number of electrode groups may be the same as the number of data electrodes.

The number of electrode groups may be two or more, and may be smaller than the total number of data electrodes.

The electrode groups may all include the same number of the data electrodes, or may be configured to include one or more different numbers of the data electrodes.

In addition, at least one of the data electrodes included in the electrode group may be configured to all face in the same direction, or one or more toward different directions.

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

4 is a front view illustrating a data electrode structure of the plasma display panel according to the first embodiment of the present invention.

Referring to FIG. 4, the PDP according to the first embodiment of the present invention includes a lower substrate 10 formed of glass material, a display area C disposed at the center of the lower substrate 10, and a display. A data electrode 20 extending from the area C to an outer side of the display area C, an electrode pad 22 which is a portion in which the data electrode 20 extends above or below the outside of the display area C, The electrode group 30 made of a plurality of groups divided by a predetermined number of data electrodes 20 arranged on the lower substrate 10 is attached to one end of the electrode pad 22 to apply a signal to the electrode pad 22. Although not shown, the connector 40 is provided to cross the upper side of the electrode pad 22 outside the display area C to bond the lower substrate and the upper substrate to the outside of the display area C of the PDP. Including sealant that prevents air It is open configuration.

Here, the PDP illustrated in FIG. 4 is a simplified diagram for explaining the electrode pad structure of the PDP according to the present invention, and there are various other components constituting the PDP.

The display area C emits visible light by emitting phosphors 240 in each discharge cell divided by the partition walls 210 of FIG. 1 to emit visible light, thereby displaying an image desired by a user.

In FIG. 4, each data electrode 20 disposed in the display area C of the PDP is formed to be a separate electrode group 30.

In addition, the electrode pads 22 are disposed above and below the outside of the display area C, and are alternately arranged above or below the outside of the display area C. At this time, the arrangement order may be arranged in the upper side when the odd number is odd, and arranged in the lower side when the even number is odd, and the reverse order is also possible.

As a result, the distance between the adjacent electrode pads 22 is widened so that a short circuit between the adjacent electrode pads 22 may be prevented even when a certain amount of silver (Ag) diffusion occurs.

The connector 40 is attached to the end of the electrode pad 22 and connected to a substrate (300 in FIG. 3), that is, a printed circuit board (PCB) on which an external driving circuit is installed, to supply power to the electrode pad 22. And a signal to be applied. Here, the connector 40 is a film-type device having wiring for connection with the driving part (300 of FIG. 3), for example, a chip on film (COF), flexible printed circuits (FPC), a tape carrier package (TCP), and the like. Is done.

5 is a front view illustrating a data electrode structure of the plasma display panel according to the second embodiment of the present invention.

In FIG. 5, the data electrodes 20 in which the arrangement order of the data electrodes 20 arranged in the display area C correspond to multiples of 3 from the left side form the respective electrode groups 30. That is, the data electrode 20 located 1st to 2nd from the left forms one electrode group 30, and the data electrode 20 located 3rd forms another electrode group 30. . Thereafter, two data electrodes 20 and one data electrode 20 are continuously configured to form individual electrode groups 30 different from each other.

In addition, the electrode pads 22, in which the data electrodes 20 having an arrangement order of the individual electrode groups 30, which are multiples of 3, extends to the upper side outside the display area C, are arranged above the display area C. The remaining electrode pads 22 are configured to be arranged below. The method of arranging the electrode group 30 or the electrode pad 22 may be adjusted and arranged according to a situation such as a multiple of 4 or a multiple of 5 in addition to the multiple of 3.

6 is a front view illustrating a data electrode structure of a plasma display panel according to a third embodiment of the present invention.

Referring to FIG. 6, three data electrodes 20 from the left side of the display area C are configured to form one electrode group 30. Here, the number of data electrodes 20 constituting one electrode group 30 can be added or subtracted.

The electrode pads 22 of the data electrodes 20 included in each electrode group 30 are configured to face in the same direction.

7 is a front view illustrating a data electrode structure of a plasma display panel according to a fourth embodiment of the present invention.

Referring to FIG. 7, the same number of data electrodes 20 included in each electrode group 30 is different from the same, and electrode pads of the data electrodes 20 included in each electrode group 30 are mixed. 22 is configured to face in the same direction.

8 is a front view illustrating a data electrode structure of a plasma display panel according to a fifth embodiment of the present invention.

As illustrated in FIG. 7, the same number or different numbers of data electrodes 20 included in one electrode group 30 are mixed, and the data electrodes 20 forming each electrode group 30 are mixed. The electrode pads 22) are also configured to mix in the same direction or in different directions.

In the present invention, the electrode pads 22 of the data electrode 20 are arranged and used on the upper and lower edges of the display area C. However, the scan electrodes formed on the upper substrate (100 of FIG. Alternatively, the pads of the sustain electrodes 111 and 112 of FIG. 1 may be arranged on the left and right sides of the display area C. FIG.

As described above, it will be understood by those skilled in the art that the technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the plasma display panel according to the present invention has the effect of reducing the short circuit caused by silver diffusion phenomenon by increasing the pitch between the electrode pads by dividing the electrode pads on the upper and lower sides of the outside of the display area of the plasma display panel. There is.

Claims (7)

In a plasma display panel having electrode pads of a plurality of data electrodes, Divide the data electrode into a plurality of electrode groups, And electrode pads of the electrode group are alternately arranged above and below the display area of the plasma display panel. delete delete The method of claim 1, The number of the electrode group is the same as the number of the data electrode data electrode structure of the plasma display panel. The method of claim 1, And the number of the electrode groups is two or more, and less than the total number of data electrodes. The method of claim 1, And the electrode group includes the same number of the data electrodes or one or more different numbers of the data electrodes. The method of claim 1, The data electrode structure of the plasma display panel, wherein at least one of the data electrodes included in the electrode group all faces the same direction, or at least one of the data electrodes faces different directions.

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