KR20000034682A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel(PDP) is provided to narrow a distance between adjacent pixels while preventing cross-talk and thereby to improve an opening rate. CONSTITUTION: A black matrix(X) is formed as a black conductive layer(K) like a metal electrode(M) on a portion of transparent electrode(T). The metal electrode(M) is also formed with the black conductive layer(K) of a black body color. If the black matrix(X) has no electrical connection, the matrix(X) is composed of the transparent electrode(T) and the black conductive layer(K), forming a capacitor in a dielectric layer(D). The capacitor captures an electric charge generated from discharge of a pixel, so the electric charge cannot move to an adjacent pixel through the dielectric layer(D) and thereby cross-talk is prevented. If an ordinary voltage is applied to the black matrix(X), the matrix(X) can be used as an auxiliary electrode supplying a charge to adjacent pixels at both sides thereof.

Description

Plasma display device

The present invention relates to a plasma display panel (PDP).

As is well known, PDP uses gas discharge phenomena for image display, which can be configured to have a large area and a thin film, and its use as a next generation image display device such as a wall-mounted TV is increasing.

FIG. 1 shows an AC PDP, in particular, a lateral discharge PDP, which arranges electrodes E1 and E2 that cross each other on the front substrate P1 and the rear substrate P2, and each of them is arranged. It has a configuration of a basic PDP in which pixels of intersections are partitioned into partitions B. As shown in FIG.

Either one of the positive electrodes E1 and E2 (the front electrode in the case of a transmissive configuration; E1) is buried under the dielectric layer D. In particular, the front electrode E1 is connected to the transparent electrode T in order not to inhibit light transmission. In order to prevent the voltage drop, the metal electrode M having a smaller area is provided as a bus electrode.

In this configuration, the front electrode E1 is composed of a pair, and after generating the discharge electrode V1 and the start discharge V1 on the opposite side, a sustain discharge V2 occurs between the pair of the front electrodes E1. The light is emitted to display an image.

On the other hand, a black matrix (X) is formed between each pixel to improve a pair of contrast.

Here, the black matrix (X) is formed by dispersing black pigment in a dielectric material having a lower dielectric constant than the dielectric layer (D), which is a process separate from other functional layers, that is, the transparent electrode (T) and the metal electrode (M). Is formed by printing or photolithography, which consumes considerable manufacturing labor.

However, in order to improve the display brightness of the PDP, the discharge intensity must be improved and the aperture ratio must be increased. Except for the opaque metal electrode M, the partition B, the black matrix X, and the like in FIG. The ratio of the light transmissive portion is the aperture ratio.

Therefore, the area of the transparent electrode T should be increased as much as possible and the area of the metal electrode M or the black matrix X should be reduced. However, the reduction of the area of the black matrix (X) means the reduction of the distance between the electrodes E1 of the adjacent pixels, even though both electrodes E1 are insulated by the dielectric layer D and the black matrix X. Since is basically an alternating current type, that is, wall charges, if the two are excessively adjacent to each other, a problem of crosstalk is caused by wall charges charged on the surface of the dielectric layer D. Therefore, in the related art, the area of the black matrix X partitioning between pixels cannot be reduced any more, so that it is difficult to improve the aperture ratio.

In view of such a conventional problem, an object of the present invention is to provide a PDP which can improve the aperture ratio by preventing the crosstalk between adjacent pixels while sufficiently reducing the gap, and simplifying the manufacturing process. .

1 is a cross-sectional view showing the configuration of a lateral discharge type PDP;

2 (A) to (D) are sequential cross-sectional views showing a manufacturing process of the present invention PDP.

3 is a cross-sectional view showing the configuration of the present invention PDP.

Explanation of symbols on the main parts of the drawings

P1, P2: front and back substrates E1, E2: front and back electrodes

D: dielectric layer T: transparent electrode

M: metal electrode X: black matrix

K: black conductive layer

In order to achieve the above object, the PDP according to the present invention is characterized in that the black matrix is made of a black conductive material.

Thus, even if no charge is supplied to the black matrix, the transfer of charge between adjacent pixels can be blocked by its own capacitance, and crosstalk can be prevented even if the area is reduced.

As a result, the present invention can provide a PDP having a high aperture ratio and excellent screen brightness with high productivity.

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

The PDP of the present invention is preferably manufactured by the method as shown in FIG.

First, the front substrate P1 is patterned by a method such as printing or photolithography on the transparent electrode T as shown in FIG. 2 (A). In the present invention, the black matrix X is formed of a black conductive material. The transparent electrode T is formed not only at the position at which the front electrode E1 is formed but also at the position at which the black matrix X is formed.

Next, a mask M is covered on the transparent electrode T as shown in FIG. 2B. The mask M is a metal electrode (eg, a photoresist of a photoresist or a polymer organic layer printed). It forms so that only the position of M) and the black matrix (X) may be exposed.

Next, as shown in FIG. 2C, a black conductive material is filled in the exposed portion of the mask M. Preferably, the method is an electrodeposition method. In other words, the transparent electrode T is used as an electrode to treat black conductive material, for example, black metal powder such as black Ag, or a mixture of a metal powder and a black pigment in an electrodeposition solution dispersed therein, and black on the exposed portion on the transparent electrode T. The conductive layer K is attached. The black conductive layer K forms the metal electrode M and the black matrix X together. The black conductive layer K may be formed by a printing method in some cases.

In this state, if the mask M is removed by a firing method or the like, the dielectric layer D is laminated by a printing method or the like to obtain a state of FIG. 2D.

The configuration of the PDP completed in this manner is shown in FIG. In the PDP, the black matrix X is formed of the same black conductive layer K as the metal electrode M on a part of the transparent electrode T, and the metal electrode M is black. It is characterized by consisting of a black conductive layer (k) having a body color (body color).

Since the black matrix (X) itself is conductive, it can be used in two ways.

First, when no electrical connection is made to this, the black matrix (X) is composed of a transparent electrode (T) and a black conductive layer (K) to form a capacitor having a predetermined capacitance between the dielectric layer (D). To form. Accordingly, when the charge generated during the discharge of one pixel is to be moved to the adjacent pixel along the dielectric layer D, the charge cannot be captured and moved by the capacitor formed by the black matrix X, thereby preventing crosstalk. .

On the other hand, when the constant voltage is applied to the black matrix X, it can be used as an auxiliary electrode for supplying electric charges to promote the discharge start of adjacent pixels on both sides.

As the black matrix (X) blocks the crosstalk between adjacent pixels, the area can be reduced. In this case, the black conductive layer (K) in which the metal electrode (M) used as the bus electrode is the same as the black matrix (X). Since the contrast is reduced, no decrease in contrast occurs.

As described above, the present invention improves the screen brightness and prevents the degradation of the contrast through the metal electrode, by reducing the area of the black matrix which reduces the screen brightness instead of improving the contrast. In addition, the conductivity of the black matrix is imparted to prevent crosstalk or to be used as an auxiliary electrode.

Claims (4)

In a plasma display device in which an electrode on a front substrate is composed of a stack of transparent electrodes and metal electrodes, and a black matrix is formed between each pixel, And the black matrix is made of a black conductive material. The method of claim 1, And the black matrix is formed of a black conductive layer together with the metal electrode. The method according to claim 1 or 2, The transparent electrode is formed on the front substrate including the formation position of the black matrix, And the black matrix and the metal electrode are formed on the transparent electrode by electrodeposition using the transparent electrode as an electrode. The method of claim 1, And a dielectric layer stacked on the transparent electrode, the metal electrode, and the black matrix.