KR19990034466A - Electrode Structure of Plasma Display Device - Google Patents

Abstract

The present invention discloses a novel electrode structure of a PDP.

In the surface discharge type PDP, a small distance between the start electrode and the sustain electrode which causes a lateral discharge is advantageous in discharge. However, when the distance is too small, light transmission is inhibited. In the present invention, light transmission is prevented from the start electrode and / or the sustain electrode. The protrusions were formed in the gap to reduce the discharge gap by the protrusions while the gap between the two electrodes was the same as or larger than the conventional one.

As a result, the driving voltage was lowered and the discharge intensity was improved without inhibiting light transmission, thereby realizing a PDP having high overall luminance and low power consumption.

Description

Electrode Structure of Plasma Display Device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP), and more particularly to an electrode structure suitable for use in a surface discharge type PDP.

PDP using the gas discharge phenomenon for image display, starting from the DC type PDP of the simplest structure and through various types of PDPs of the AC type and hybrid type to form the main species of PDP currently in practical use is shown in FIG. It is a surface discharge type PDP as shown.

In FIG. 1, the front and back substrates P1 and P2 having the discharge space V formed therebetween have the front electrode E1 and the rear electrode E2 arranged to face each other and partitioned by a gap B. A dielectric layer (not shown for convenience) is formed on one of the electrodes (front electrode E1 in the drawing), and a plurality of electrodes E1 under the dielectric layer are formed.

That is, one or two front electrodes E1 cause a sustain discharge V2 between the back electrode E2 on the opposite side and the start electrode E3 causing the start discharge V1, and the start electrode E3. It is composed of sustain electrodes E4 (one in the drawing).

Accordingly, the surface discharge type PDP is called a multi-electrode PDP such as a three electrode or four electrode.

2 shows an enlarged projection of one pixel of the surface discharge type PDP, and the start electrode E3 causes the start discharge V1 to occur between the sustain electrode E4 and the back electrode E2 at the rear side of the drawing. The sustain discharge (V2) is caused by a lateral discharge in between, and the discharge intensity and light emission luminance are improved by maintaining the entire discharge.

The discharge intensity of the gas discharge is proportional to the potential difference between the two points and is inversely proportional to the distance. Accordingly, the smaller the interval d between the start electrode E3 and the sustain electrode E4 is, the larger the discharge intensity becomes, but there is a problem in that the interval d cannot be shortened to any value below.

In other words, if the distance between the start electrode E3 and the sustain electrode E4 is too narrow, light transmission between them is inhibited and the luminance of light is inevitably inhibited. Even if these are formed of transparent materials, E3 and E4 are formed. As a matter of conductivity, the metal electrode should be used together as a bus electrode, so the gap d should be maintained at more than one.

As a result, in the conventional surface discharge type PDP, in order to improve the luminance of the light emitting device, the driving voltage must be increased, which causes a problem with large power consumption.

In view of such conventional problems, an object of the present invention is to provide an electrode structure capable of increasing the discharge intensity without inhibiting light transmission even with a low driving voltage.

1 is a cross-sectional view showing the basic configuration of a surface discharge type PDP,

2 is an enlarged projection plan view showing the configuration of one pixel of the surface discharge type PDP;

3 to 6 are enlarged projection plan views showing an electrode structure of the PDP of the present invention, respectively.

<Description of Symbols for Main Parts of Drawings>

E1: front electrode E2: back electrode

E3: start electrode E4: sustain electrode

1a ~ 1d: protrusion

In order to achieve the above object, the electrode structure according to the present invention is characterized in that at least one of the start electrode and the sustain electrode causing a lateral discharge is provided with a protrusion extending toward the other electrode.

Then, the discharge gap of the two electrodes is the distance between the protrusion and the other electrode, or the distance between the protrusions of the two electrodes, so that the discharge intensity can be improved even if the driving voltage is lowered. Will not.

Accordingly, the present invention provides an electrode structure capable of achieving high emission intensity with low driving voltage but without high light transmission inhibition.

EXAMPLE

Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIG. 3, any one of the front electrode E1 and the back electrode E2 (here, the front electrode E1) includes a start electrode E3 and one or two sustain electrodes E4 parallel to each other for surface discharge. do.

According to the characteristics of the present invention, a plurality of protrusions 1a having a predetermined length are formed extending from one electrode E3 or E4 of the two electrodes E3 and E4 transversely discharged toward the other electrode E4 or E3. The protrusions 1a extend from the positive electrodes E3 and E4, respectively. In this case, the positions of the protrusions 1a of the positive electrodes E3 and E4 are preferably aligned with each other.

The protrusion 1a may be integrally formed with the electrodes E3 and E4 when the electrodes E3 and E4 are formed by printing. In the case of the printing method, the protrusion 1a may be simply implemented by changing the pattern of the printing mask.

Accordingly, the distance between the two electrodes E3 and E4 is maintained at d1, but the discharge gap between the two electrodes E3 and E4 is shortened to d2 by the protrusion 1a. The relative relationship between d1 and d2 and the distance between the conventional electrodes E3 and E4 (d in FIG. 2) is preferably d1. d> d2.

That is, the distance d1 between the electrodes E3 and E4 is equal to or larger than the conventional one, and thus the light transmittance may be equal to or larger than the conventional one, and the discharge gap d2 becomes smaller than the conventional one, so that the sustain discharge is performed at a smaller driving voltage than the conventional one. (V2 in FIG. 1) or at the same driving voltage, the discharge intensity of the sustain discharge V2 is greatly increased.

Here, when the sustain voltage is applied to the start and sustain electrodes E3 and E4, the charges (actually, wall charges formed on the surface of the dielectric layer (not shown) on both electrodes E3 and E4) are sharpened according to the lightning rod principle. It is mainly concentrated at the tip of the protrusion 1a which is a (sharp edge).

As a result, not only the discharge discharge V2 is started more quickly than in the related art, but also the discharge intensity becomes stronger.

However, in the case of the embodiment of FIG. 3, since the sustain discharge V2 mainly occurs at the tip of the protrusions 1a corresponding to each other, unless a large number of pairs of the protrusions 1a are provided in order to cause surface discharge in one pixel indicated by a dashed line, Can not be done.

Accordingly, the embodiment of FIG. 4 has a T-shaped protrusion 1b instead of the I-shaped protrusion 1a of FIG. 3, so that the tip portions of the protrusion 1b face each other by a considerable length, so that a small number of protrusions are provided. The pair (1b) can also cause surface discharge over a larger area.

On the other hand, the embodiment of FIG. 5 forms a sharper pointed portion by forming the protrusions 1c in a triangle for more active use of the lightning rod principle described in FIG. 3 to more quickly and powerfully initiate the sustain discharge V2.

However, since the PDP is a discharge element, it forms a triangular protrusion 1c as shown in FIG. 5, and the tip thereof is damaged, which may shorten the service life. Moreover, since the opposing area between the protrusions 1c is small, the overall discharge strength may be low. In the manufacturing process, if the tip formation of the projection 1c such as printing is not uniform, there is a fear that local discharge may occur.

Therefore, the embodiment of FIG. 6 includes a semicircular protrusion 1d, where the semicircle does not mean that the circle is divided into two, but the egg or oval has a gentle curvature. Note that it is formed.

6 is the shortest distance between both protrusions 1d, but since the outer ends of the protrusions 1d slowly retreating therefrom are opposed to each other, a rapid start of sustain discharge V2 and the sustain discharge V2 are wide. Both conditions can be met that must occur over an area.

Accordingly, the present invention provides an electrode structure capable of achieving high emission intensity with low driving voltage but without high light transmission inhibition.

Claims (6)

In a plasma display device, wherein an electrode on either side of the front substrate and the back substrate is composed of an opposite electrode, a start electrode causing a start discharge, and the start electrode and one or a plurality of sustain electrodes causing a sustain discharge. And at least one of the starting electrode and the sustain electrode is provided with a plurality of protrusions extending toward the other electrode. The method of claim 1, The plurality of protrusions extend from both sides of the start electrode and the sustain electrode, and corresponding protrusions extending from the positive electrode are matched with each other to form a plurality of protrusion pairs. An electrode structure of a plasma display device, characterized in that. The method according to claim 1 or 2, The protrusion is formed to be I-shaped An electrode structure of a plasma display device, characterized in that. The method according to claim 1 or 2, The protrusion is formed in a T-shape An electrode structure of a plasma display device, characterized in that. The method according to claim 1 or 2, The protrusion is formed in a triangle An electrode structure of a plasma display device, characterized in that. The method according to claim 1 or 2, The protrusion is formed in a semicircular shape An electrode structure of a plasma display device, characterized in that.