KR19990054297A - AC Plasma Display Panel - Google Patents

Abstract

The present invention relates to an alternating current plasma display panel, and more particularly, to an alternating current type plasma display panel in which the shape of a discharge sustaining electrode is changed. The discharge sustaining electrode of the present invention connects a stripe-shaped first electrode, a pair of parallel vertical portions extending from one side of the first electrode, and an end portion of the vertical portions, and a horizontal portion parallel to the first electrode. It consists of a 2nd electrode containing. Here, the width of the second electrode is a fine width smaller than the width of the first electrode, and the second electrodes are formed on each of the opposing surfaces between two adjacent first electrodes.

Description

AC Plasma Display Panel

The present invention relates to a plasma display panel, and more particularly, to an alternating current plasma display panel in which the shape of a discharge sustaining electrode is changed.

Plasma Display Panel (PDP), which is one of flat panel display devices, is a display device using gas discharge, and has an array of discharge cells capable of independently discharging. Since the PDP can be manufactured with a relatively thin thickness, the thickness and weight of the PDP can be remarkably reduced compared to the CRT display device using an electron gun. have.

1 is a view illustrating a discharge cell of a conventional AC PDP. As illustrated, an address electrode 2 for transmitting data is formed on a rear substrate 1, and a front surface of the rear substrate 1 including the same is formed. A first dielectric layer 3 is applied, and a partition wall 4 is formed on the first dielectric layer 3 to define independent discharge cells and to prevent crosstalk between adjacent discharge cells. On the first dielectric layer 3, a phosphor 5 emitting one color selected from red, blue or green for realizing the colorization of the PDP is applied to a predetermined thickness. On the front substrate 6, two discharge holding electrodes 7 including a transparent electrode 7 a and a bus electrode 7 b are formed, and the front substrate 6 including the discharge holding electrodes 7 is formed on the front substrate 6. The second dielectric layer 8 and the protective layer 9 such as the MgO layer are sequentially formed to charge the charge generated between the discharge sustain electrodes 7 and to protect the discharge sustain electrodes 7. Is applied.

As shown, the rear substrate 1 and the front substrate 6 are bonded so that the electrode arrangement surfaces face each other, and in the discharge cell defined by the partition 3, argon (Ar) and neon (Ne). Alternatively, a discharge gas 10 such as xenon Xe is injected.

2 and 3 are views for explaining a method of driving a conventional AC PDP, and FIG. 2 is a view showing a front substrate on which discharge sustain electrodes are formed, and FIG. 3 shows electric fields generated between the discharge sustain electrodes. Drawing. Here, the same parts as in Fig. 1 are denoted by the same reference numerals.

As shown in FIG. 2, two discharge sustain electrodes 7 are formed in one discharge cell, and the discharge sustain electrodes 7 are transparent electrodes 7a made of a transparent metal such as indium tin oxide (ITO). And a bus electrode 7b made of an opaque metal. Here, the transparent electrodes 7a are formed parallel to each other on the front substrate 6, and at this time, the transparent electrodes 7a are formed at intervals to obtain the maximum discharge efficiency therebetween. The bus electrodes 7b are formed on the transparent electrodes 7a in a length smaller than the width of the transparent electrodes 7a in the length direction thereof, and along the non-facing edges of the transparent electrodes 7a, respectively. Is formed.

Meanwhile, as shown in FIG. 3, when a predetermined voltage is applied to each of the discharge sustaining electrodes as described above, an electric field 11 is generated between the discharge sustaining electrodes 7 due to a potential difference therebetween. 11) causes a discharge.

In detail, when an electric field is generated by the potential difference between the discharge holding electrodes, the positive ions of the discharge gas enclosed in the discharge cell are accelerated by the electric field, and the accelerated cations collide with the protective layer. As a result, secondary electrons are emitted from the protective layer, and these secondary electrons are accelerated again by the electric field to collide with the gas atoms, ionize them to generate electrons, and bring the atoms into an excited state. At this time, ultraviolet rays are emitted from the excited atoms, and the ultraviolet rays are absorbed and emitted to the phosphor to generate visible light.

Therefore, as shown in Fig. 1, each discharge cell is coated with a phosphor that emits a red, blue or green color, and when discharge occurs in each of the plurality of discharge cells, each discharge cell is predetermined. By emitting color visible light, a desired image is reproduced as a whole.

However, the conventional AC PDP as described above mainly uses ITO (Indium Tin Oxide) as a transparent electrode. Since such ITO cannot be formed by a printing method, it is usually formed by the same method as sputtering. Accordingly, there is a problem in terms of cost by requiring expensive sputtering equipment. Further, the selection of materials is limited because the bus electrode has to consider problems such as compatibility with the transparent electrode and adhesion in forming on the transparent electrode. There is a problem in that alignment between the transparent electrode and the bus electrode is difficult.

Therefore, the present invention has been made to solve the above problems, while maintaining the strength and transmittance of the electric field capable of discharging, while reducing the manufacturing cost and time, and also the PDP can widen the choice of bus electrode material The purpose is to provide.

1 is a cross-sectional view for explaining a conventional AC plasma display panel.

FIG. 2 is a schematic configuration diagram of a conventional AC plasma display, and is a plan view showing an arrangement of electrodes and a partition wall; FIG.

3 is a view for explaining the electric field generated between the discharge holding electrodes of the conventional AC plasma display panel.

4 is a schematic configuration diagram of an AC plasma display panel according to an exemplary embodiment of the present invention, and a plan view showing arrangement of discharge sustaining electrodes and partition walls.

5 is a view for explaining the electric field between the discharge holding electrodes of the AC plasma display panel according to an embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of an AC plasma display panel according to another embodiment of the present invention, showing a layout of discharge sustaining electrodes and partition walls; FIG.

(Explanation of symbols for the main parts of the drawing)

14 bulkhead 20 first electrode

30: second electrode 30a: vertical portion

30b: horizontal portion 50: discharge sustaining electrode

60: electric field

In order to achieve the above object, the present invention connects the discharge sustaining electrode with a stripe-shaped first electrode, a pair of parallel vertical portions extending from one side of the first electrode and the ends of the vertical portions; It consists of a 2nd electrode including the horizontal part parallel to a 1st electrode. At this time, the second electrode is formed with a fine width smaller than the width of the first electrode, and, in addition, the second electrodes are formed on each of the opposing surfaces between two adjacent first electrodes.

According to the present invention, since only the bus electrode is formed as the discharge sustaining electrode, the manufacturing cost and time of the PDP can be further reduced, and the degradation of the characteristics of the PDP due to misalignment between the transparent electrode and the bus electrode can be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a schematic configuration diagram of an AC PDP according to an exemplary embodiment of the present invention, which is a plan view showing the arrangement of discharge sustaining electrodes and partition walls.

As shown, the discharge sustaining electrodes 50 are disposed at a predetermined interval in parallel to each other, and the partitions 14 are disposed to be orthogonal to the discharge sustaining electrodes. Here, the discharge sustaining electrode 50 is formed only of a bus electrode made of an opaque metal without forming a transparent electrode, and has a parallel first electrode 20 having a stripe shape and extending from one side of the first electrode 20. A second electrode 30 having a "c" shape consisting of a pair of vertical portions 30a and horizontal portions 30b connecting the ends of the vertical portions 30a and parallel to the first electrodes 20. ) At this time, the second electrode 30 is formed to have a width smaller than the width of the first electrode.

Therefore, in the discharge cell defined by the partition walls 14, two first electrodes 20 parallel to each other as discharge sustaining electrodes 50 and two formed on opposite surfaces of the first electrodes 20, respectively. Second electrodes 30 are disposed.

In the above, since the discharge sustaining electrode is formed only of a bus electrode made of an opaque metal, it is not necessary to form a transparent electrode in a sputtering process requiring expensive equipment, and thus, manufacturing cost can be reduced and, once Since the first and second electrodes can also be formed by the step of, the production time can also be reduced. In addition, since the transparent electrode is not formed, the range of bus electrode material selection can be expanded.

In addition, in the case where the discharge sustaining electrode is formed only of the bus electrode which is an opaque metal, the permeability of the PDP may decrease when the width of the bus electrode is increased in order to obtain excellent discharge efficiency, but as in the present invention, the first electrode is It is the same as the form of the conventional bus electrode, but the width thereof is reduced, and when the second electrode is formed in a "c" shape having a fine width smaller than the width of the first electrode, it is transparent having a light transmittance of 80 to 90%. Compared with the conventional AC PDP forming the electrode, the transmittance can be obtained at about the same level.

5 is a view for explaining the electric field between the discharge holding electrodes of the AC PDP according to an embodiment of the present invention.

When a predetermined voltage is applied to each of the discharge sustaining electrodes, an electric field 60 is generated in each of the discharge sustaining electrodes 50 including the first and second electrodes 20 and 30. Here, if the discharge sustaining electrode is formed only of the bus electrode in the form of a stripe without forming the transparent electrode, the electric field generated in each discharge sustaining electrode is weak in strength so that no discharge occurs between adjacent discharge sustaining electrodes. When the bus electrode is composed of a stripe-shaped first electrode and a "c" shaped second electrode, the electric field generated at each of the discharge sustaining electrodes at the time of discharge between the conventional discharge sustaining electrodes shown in FIG. Since it is almost the same as the intensity, there is no problem in generating a discharge.

6 is a schematic configuration diagram of an alternating current PDP according to another embodiment of the present invention, which is a plan view showing an arrangement of discharge sustaining electrodes and partition walls. Here, the same parts as in Fig. 4 are denoted by the same reference numerals.

As shown, the discharge sustaining electrode 50, as in the above-described embodiment of the present invention, has a first electrode 20 in the form of a stripe, and a second electrode of the "C" shape connected to the first electrode 20. 30, the vertical portion 30a of the second electrode 30 is disposed below the partition wall 14. Accordingly, while the intensity of the electric field generated between the discharge sustain electrodes 50 can be obtained in the same manner as in the above-described embodiment, better characteristics can be obtained in terms of transmittance.

Meanwhile, in the present invention, in order to prevent the sputtering of the passivation layer positioned on the second electrode due to the influence of the metal second electrode during gas discharge, a dielectric having a low dielectric constant is further coated on the dielectric layer to be applied. A protective film is formed later.

As described above, the AC-type PDP according to the present invention can obtain almost the same level of electric field strength and transmittance as the conventional AC-type PDP even when the discharge sustaining electrode is formed only of a bus electrode which is an opaque metal. The time can be further reduced and the selection of bus electrode materials can be widened. In addition, since only the bus electrode is formed, it is possible to prevent deterioration of the characteristics of the PDP due to misalignment between the transparent electrode and the bus electrode.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

Claims (5)

A plurality of address electrodes parallel to each other at equal intervals are formed, a rear substrate having partition walls defining unit discharge cells between the adjacent address electrodes, and a pair of discharge holdings spaced at first intervals to cause discharge; At least two pairs of electrodes are formed in parallel with each other at a second interval wider than a first interval, and include a front substrate coated with a dielectric layer and a protective film to cover the discharge sustaining electrodes, wherein the back substrate and the front substrate are formed of electrodes. As an alternating plasma display panel in which an arrangement surface faces, the address electrode and the discharge sustaining electrode are joined to be orthogonal, and a discharge gas is enclosed in a discharge cell defined by the partition wall. The discharge sustaining electrode includes a first electrode having a stripe shape, and a pair of parallel vertical portions extending from one side of the first electrode, and a horizontal portion connecting the ends of the vertical portions and parallel to the first electrode. And a second electrode, wherein the second electrode is formed on each of the opposing surfaces between two adjacent first electrodes. The AC plasma display panel of claim 1, wherein the second electrode is smaller than a width of the first electrode. The AC plasma display panel of claim 1, wherein the vertical portion of the second electrode is disposed in a discharge cell. The AC plasma display panel of claim 1, wherein the vertical portion of the second electrode is disposed under the partition wall. The AC plasma display panel of claim 1, wherein a dielectric having a low dielectric constant is further coated on the dielectric layer.