KR100286768B1 - Plasma display panel - Google Patents

Abstract

The present invention eliminates unwanted gap potentials between the discharge sustaining electrodes, thereby replacing the insulating layer with a ferro material to prevent loss due to voltage drop, and to prevent interference and absorption of light caused when visible light passes through the dielectric film and the protective film. The present invention discloses a plasma display panel which can be removed to increase luminous efficiency due to an increase in phosphor coating area caused by an increase in efficiency and an increase in height of a partition wall. The disclosed invention includes a discharge sustaining electrode arranged in a stripe shape on a front substrate, a dielectric film disposed to surround the discharge sustaining electrode, and a protective layer covering the surface of the dielectric film.

Description

Plasma display panel

The present invention relates to a plasma display panel, and more particularly to a dielectric structure of the front plate of the plasma display panel.

Plasma Display Panel, which is one of the flat panel display devices, is composed of an array of discharge cells that can be discharged independently, and reproduces a predetermined image by discharging each discharge cell independently according to an electrical signal applied from the outside. do.

Since the plasma display panel can be manufactured to have a total thickness of 10 cm or less, the plasma display panel can significantly reduce its thickness and weight compared to a CRT display device using an electron gun, and is easier to process moving images than a liquid crystal display device. It is easy to manufacture a display device.

1 illustrates a front substrate structure of a general plasma display panel. Referring to the drawings, a transparent electrode 2 is formed in a stripe shape on the front substrate 1, and a bus electrode 3 is disposed on the transparent electrode 2. This is arranged, and the discharge sustain electrode 4 is formed.

On top of the front substrate 1 on which the discharge sustaining electrode is formed, a dielectric film 5 such as, for example, PbO of BST series is deposited so as to generate wall charges while insulating the electrodes 4.

A protective layer 6 is formed above the dielectric film 5 to prevent the dielectric film from being destroyed from the plasma. At this time, MgO is used as the protective layer 6.

Here, reference numeral 7 denotes a rear substrate of the plasma display panel, 8 denotes a data electrode, and 9 denotes a reflective film. Reference numeral 10 is a phosphor, and 100 is a partition wall. At this time, the discharge gas is filled in the space in the partition wall 100.

However, since the dielectric film 5 is formed not only around the discharge sustaining electrode 4 but also on the front substrate, an unwanted gap potential is generated between the discharge sustaining electrodes, so that when the high dielectric material is used as the insulating layer, the voltage drops. Reactive power is generated in proportion to preventing losses.

Moreover, as the emitted visible light passes through the protective layer 6 and the dielectric film 5, absorption of energy (or light) and interference between the two films 5 and 6 occur, resulting in a decrease in luminance. .

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and removes unwanted gap potentials between the discharge sustain electrodes, while not only reducing the decrease in luminance when passing through the protective layer and the dielectric film, but also the partition height. It is to provide a plasma display panel that can increase the coating area by increasing the.

1 is a cross-sectional view of a front substrate of a conventional plasma display panel.

2 is a cross-sectional view of the front substrate of the plasma display panel according to the present invention;

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

11-front substrate 12-transparent electrode

13-bus electrode 14-discharge sustaining electrode

15-dielectric film 16-protective layer

17-back substrate 18-reflective film

19-bulkhead 20-phosphor

21- data electrode

In order to achieve the above object of the present invention, the present invention according to an embodiment of the present invention, the discharge sustain electrode arranged in a stripe shape on the front substrate, a dielectric film disposed to surround the discharge sustain electrode, and the And a protective layer covering the surface of the dielectric film.

Here, the dielectric film is a ferro substance.

According to the present invention, the dielectric film formed on the front substrate is formed so as to surround only the discharge sustaining electrode, and the protective layer is formed only on the dielectric film so that a space exists between the discharge sustaining electrodes. Accordingly, unwanted gap potentials between the discharge sustaining electrodes can be prevented, and luminance decrease caused by passing through the protective layer and the dielectric film can be reduced, and the luminous efficiency can also be increased by increasing the phosphor coating area due to the rise of the barrier height.

(Example)

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

2 is a cross-sectional view of a front substrate of a plasma display panel according to the present invention.

Referring to FIG. 2, the transparent electrode 12 is disposed in a stripe shape on the front substrate 11. In this case, the transparent electrodes 12 may be disposed such that a pair is provided per unit discharge space.

A bus electrode 13 having a narrower width than that of the transparent electrode 12 is disposed on the transparent electrode 12 in the same direction as the transparent electrode 12 to form the discharge sustaining electrode 14.

A high dielectric film 15, for example, a ferro material is deposited on the front substrate 11 on which the discharge sustain electrode 14 is formed. Thereafter, the high dielectric film 15 is patterned to cover only the portion of the discharge sustaining electrode 14. Therefore, the high dielectric film 15 is not disposed on the front substrate 11 without the discharge sustain electrode 14.

The protective layer 16 is covered on the surface of the high dielectric film 15. At this time, MgO material is used as the protective layer 16 as in the prior art.

Thus, since the high dielectric film 15 is formed so as to cover only the portion where the discharge sustain electrode 14 is formed, an unwanted gap potential between neighboring discharge sustain electrodes 14 is not generated.

Herein, reference numeral 17 denotes a rear substrate of the plasma display panel, 21 denotes a data electrode arranged in a direction crossing the discharge sustain electrode 14 on the rear substrate, and 18 denotes an upper portion of the data electrode 21. The reflecting film formed in this is shown. Reference numeral 19 denotes a partition wall defining a unit cell, and 20 denotes a phosphor. The space defined by the partition wall 19 is filled with a discharge gas.

Further, by using a ferroelectric material, which is a high dielectric material, as the dielectric film 15, it is possible to prevent loss due to voltage drop, thereby lowering the high driving voltage portion caused by the disadvantage.

In addition, by patterning the dielectric portion, the height of the partition wall can be increased, thereby increasing the phosphor coating area.

As described in detail above, according to the present invention, the dielectric film formed on the front substrate is formed so as to surround only the discharge sustaining electrode, and a protective layer is formed only on the dielectric film, whereby a space exists between the discharge sustaining electrodes. Do it. As a result, unwanted gap potentials between the discharge sustain electrodes can be prevented, and the loss of luminance deterioration of visible light generated while passing through the protective layer and the dielectric film can be prevented, and the phosphor coating area increases with the increase of the height of the partition wall. The luminous efficiency is increased.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (2)

A discharge sustain electrode arranged in a stripe shape on the front substrate; A dielectric film made of a high dielectric material and formed to surround only the discharge sustaining electrode on the front substrate; And a protective layer formed of MgO and enclosing only the dielectric layer on the front substrate. The plasma display panel of claim 1, wherein the high dielectric material is a ferro material containing an iron component.