KR100250424B1 - Structure of electrode of ac plasma display panel - Google Patents

Abstract

PURPOSE: A structure of an electrode of a plasma display panel of alternating current type is provided to reduce loss of transmissivity of a visible ray radiated in the fluorescent material by removing the center of a transparent front electrode to minimum. CONSTITUTION: The device includes a rear electrode(12), a front electrode(26) and a cell(24). The rear electrode(12) is installed on a rear glass board with being protected by the fluorescent material. A protecting film layer is installed with the regular distance with the rear glass board and the transparent front electrode(26) is installed in a dielectric layer under the rear glass board. The loss of the visible ray of the front electrode(26) is reduced to minimum by removing the center of the front electrode(26) and reducing the area of the front electrode(26). The visible ray generated by the fluorescent material in the cell(24) passes the protecting film layer and the dielectric layer and thereby the brightness of the cell(24) is increased.

Description

Electrode Structure of AC Plasma Display Panel

The present invention relates to an electrode structure of an AC plasma display panel, and more particularly, to an electrode structure of an AC plasma display panel having an improved shape of a front electrode.

In general, a plasma display panel is a device that displays characters or graphics using light emitted from a plasma generated during gas discharge. The electrode structure of the plasma display panel is largely alternating with a direct current type, an alternating current type, and a direct current type. Types are classified as mixed types.

The difference between the direct current type and the alternating current type is distinguished by whether the electrode is directly exposed to the discharge plasma or indirectly by the dielectric layer.

As shown in FIG. 1A, an electrode structure of a general AC plasma display panel includes a back electrode 12 provided on a rear glass substrate 10 while being protected by a phosphor 14, a rear glass substrate 10, and a rear electrode 12. It consists of a transparent front electrode 20 provided in the dielectric layer 18 between the protective film layer 16 and the front glass substrate 22 provided at a predetermined distance.

Here, the back electrode 12 and the front electrode 20 are installed in a form orthogonal as shown in FIG. 1B.

In a typical AC plasma display panel having the above electrode structure, the discharge is generated between the back electrode 12 and the front electrode 20, and the visible light generated during the discharge is a gas discharge in a mixed gas of neon and xenon. Light in a vacuum ultra-violet (VUV) region generated at the time is absorbed by the phosphor 14 and is generated according to the composition of each phosphor.

Since the visible light is transmitted through the passivation layer 16, the dielectric layer 18, and the transparent front electrode 20, a lot of loss occurs. In particular, when each layer is a thin film rather than a bulk, the visible light transmittance is proportional to the resistance of the material and inversely proportional to the conductivity, as shown in Equation 1 below.

<Equation 1>

T ∝ R = 1 / tσ _f

Where T is the transmittance, R is the resistance, t is the thickness of the layer, and σ _f is the conductivity of the thin film.

Therefore, in the electrode structure of the general AC plasma display panel, as shown in FIG. 1B, since the electrodes 12 and 20 occupy most of the space of the discharge cells 24, the visible light emitted from the fluorescent material 14 is a protective film layer ( 16 and a large loss occurs when passing through the dielectric layer 18 and the front electrode 20, especially when passing through the transparent front electrode 20.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and the AC type plasma display panel which enlarges the plasma region and increases the transmittance of visible light emitted by the phosphor by widening the high field region during the inter-electrode discharge. The purpose is to provide an electrode structure of.

According to a preferred embodiment of the present invention to achieve the above object, in the AC plasma display panel having a back electrode and a front electrode, there is provided an electrode structure of the AC plasma display panel in which the center portion of the front electrode is removed. .

1A is a view illustrating an electrode structure of a general AC plasma display panel;

Figure 1b is a view showing the installation form of the rear electrode and the front electrode shown in Figure 1a,

2A illustrates an electrode structure of an AC plasma display panel according to an exemplary embodiment of the present invention;

Figure 2b is a view showing the installation form between the back electrode and the front electrode shown in FIG.

<Description of the reference numerals for the main parts of the drawings>

10 back glass substrate 12 back electrode

14 phosphor 16: protective film layer

18: dielectric layer 20, 26: front electrode

22: front glass substrate 24: discharge cell

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

2A and 2B illustrate an electrode structure of an AC plasma display panel according to an exemplary embodiment of the present invention. The same elements as those described in FIGS. 1A and 1B are denoted by the same reference numerals, and description thereof will be described. Omit.

The difference between the electrode structure of the present invention and the conventional electrode structure is that the shape of the front electrode is different.

That is, the front electrode 26 illustrated in FIG. 2A differs from the fact that the loss of visible light due to the conductive material is minimized by removing the central portion of the electrode 26 to reduce the area of the electrode 26.

Therefore, according to the embodiment of the present invention configured as described above, the visible light generated by the phosphor in the cell 24 can pass directly through the passivation layer 16 and the dielectric layer 18, thereby increasing the brightness of the cell do.

According to the present invention as described above, by removing the central portion of the transparent front electrode it is possible to minimize the loss of transmittance of visible light emitted from the phosphor.

In addition, in general, a high electric field is formed at the edge of the electrode to increase the plasma density during discharge. According to the present invention, since the electrode edge is made more than the conventional electrode structure, the side effect of increasing the plasma density as a whole can be expected. do.

In addition, this invention is not limited only to the above-mentioned embodiment, It can implement by modifying and modifying within the range which does not deviate from the summary of this invention.

Claims (1)

An AC plasma display panel having a back electrode and a front electrode, The electrode structure of the AC plasma display panel, wherein the center portion of the front electrode is removed.

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