KR100421491B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can increase the discharge efficiency without reducing the luminance.

The plasma display panel according to the present invention is characterized by including a transparent electrode formed in each of the sustain electrode pairs for sustain discharge on the substrate and formed in a diagonal direction of the discharge cell, and a hole penetrating through the transparent electrode.

Description

Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a plasma display panel capable of increasing discharge efficiency without decreasing luminance.

Recently, researches on plasma display panels (hereinafter referred to as "PDPs"), which are easy to manufacture panels as large-area flat panel displays, have been actively conducted according to the needs of large flat panel displays. The PDP generally uses a gas discharge phenomenon to display an image using visible light generated by vacuum ultraviolet rays generated during gas discharge to emit phosphors.

1 and 2, a PDP structure of a three-electrode alternating current (AC) surface discharge method which is commonly used is shown.

The PDP shown in FIGS. 1 and 2 includes an upper plate and a lower substrate 12 having a pair of sustain electrodes 14 and 16, a dielectric layer 18, and a protective film 20 sequentially formed on the upper substrate 10. ), A lower plate composed of an address electrode 22, a partition 26, and a phosphor layer 28 is formed. The upper substrate 10 is spaced in parallel with the lower substrate 12 by the partition wall 26. On the upper substrate 10, a pair of sustain electrodes, that is, a scan / sustain electrode 14 and a common sustain electrode 16 are formed side by side, and the sustain electrode pairs 14 and 16 are transparent electrodes 14A and 16A and a bus electrode. 14B, 16B. As shown in FIG. 3, the transparent electrodes 14A and 16A have a relatively wide width and are formed of a transparent conductive material having good light transmittance of 90% or more. However, the transparent conductive material is too large a resistance value can not be efficient power transfer. Accordingly, bus electrodes 14B and 16B made of silver (Ag), copper (Cu), and the like having good conductivity are formed on the transparent electrodes 14A and 16A. The bus electrodes 14B and 16B have a relatively narrow width and compensate for the resistance of the transparent electrodes 14A and 16A.

The dielectric layer 18 and the protective layer 20 are sequentially applied on the upper substrate 10 on which the sustain electrode pairs 14 and 16 are formed. The address electrode 22 is formed on the lower substrate 12 in a direction perpendicular to the sustain electrode pairs 14 and 16, and the partition wall 26 is formed parallel to the address electrode 22. On the lower substrate 12 on which the partition wall 26 and the address electrode 22 are formed, a fluorescent layer 28 for emitting visible light of any one of red, green, and blue is sequentially applied. Discharge gas is injected into the discharge space provided between the upper plate and the lower plate by the partition wall 26.

Each of the discharge cells configured in the form of a matrix in the PDP is selected by the address discharge between the address electrode 22 and the scan / hold electrode 14, and then the vacuum generated by the continuous sustain discharge between the sustain electrodes 14 and 16. The ultraviolet light emits the fluorescent substance 28 to emit visible light.

The discharge efficiency of PDP is so good that the ratio of electrode area to discharge cell area is small. In other words, when the ratio of the electrode area becomes smaller, the reactive power consumed for charging the capacitance between the electrodes becomes smaller. In addition, as the ratio of the electrode area decreases, the discharge current decreases, and according to the reduced discharge current, the self-absorption of vacuum ultraviolet rays by the discharge gas decreases, thereby increasing the efficiency of exciting the phosphor.

As described above, although the power consumption is reduced and the efficiency is increased by reducing the electrode area, the electrode voltage is increased, and thus the margin of the driving voltage is reduced, thereby reducing the luminance.

Accordingly, an object of the present invention is to provide a plasma display panel which can increase the discharge efficiency without reducing the luminance.

1 is a perspective view showing a conventional plasma display panel.

FIG. 2 is a cross-sectional view illustrating the plasma display panel shown in FIG. 1. FIG.

3 is a plan view of the plasma display panel shown in FIG. 1;

4 is a perspective view illustrating a plasma display panel according to a first embodiment of the present invention.

FIG. 5 is a plan view of the plasma display panel shown in FIG. 4; FIG.

6 is a plan view illustrating a plasma display panel according to a second exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10,40: upper substrate 12,42: lower substrate

14,44 scanning / holding electrode 16,46 common holding electrode

18,48: upper dielectric layer 20,50: protective film

22, 52: address electrode 24, 54: lower dielectric layer

26,56: bulkhead 28,58: phosphor layer

In order to achieve the above object, the plasma display panel according to the present invention includes a transparent electrode which is included in each of the sustain electrode pairs for sustain discharge on the substrate and formed in a diagonal direction of the discharge cell, and a hole penetrating the transparent electrode. Characterized in that.

The hole is characterized in that formed in a triangle.

The sustain electrode pair may include a bus electrode formed on the transparent electrode.

And a second substrate formed to face the substrate, a partition formed between the substrate and the second substrate, and an address electrode formed on the second substrate to be orthogonal to the sustain electrode pair.

Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 to 6.

4 is a perspective view illustrating a PDP according to an embodiment of the present invention, and FIG. 5 is a plan view illustrating the PDP illustrated in FIG. 4.

4 and 5, the PDP according to the present invention includes an scan / hold electrode 44 and a common sustain electrode 46 formed on the upper substrate 40, and an address formed on the lower substrate 42. An electrode 52 is provided.

The scanning / holding electrode 44 and the common holding electrode 46 have a relatively wide width and transparent electrodes 44A and 46A made of a transparent conductive material having good light transmittance of 90% or more, and a bus electrode having a relatively narrow width. (44B, 46B). Since the bus electrodes 44B and 46B have high self resistivity of the transparent electrodes 44A and 46A, the bus electrodes 44B and 46B lower the discharge voltage by reducing them. To this end, the bus electrodes 44B and 46B are formed of silver (Ag) or copper (Cu) to compensate for the resistive components of the transparent electrodes 44A and 46A.

The transparent electrodes 44A and 46A are formed in the diagonal direction of the discharge cell. Accordingly, since the discharge is performed in the diagonal direction as compared with the discharge in the conventional short axis direction, the discharge area becomes wider than the conventional one. As the discharge area decreases, the discharge is evenly spread in the discharge cell, thereby increasing the discharge efficiency. That is, the area of the transparent electrodes 44A and 46A is similar to that of the related art, and thus the discharge efficiency is increased without lowering the luminance.

An upper dielectric layer 48 is stacked on the upper substrate 40 on which the sustain electrode pairs 44 and 46 formed of the transparent electrodes 44A and 46A and the bus electrodes 44B and 46B are formed. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 48. The passivation layer 50 is entirely stacked on the upper dielectric layer 48. The passivation layer 50 prevents damage to the upper dielectric layer 48 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 50, magnesium oxide (MgO) is usually used.

The address electrode 52 is formed on the lower substrate 42 in a direction crossing the scan / sustain electrode 44 and the common sustain electrode 46. The lower dielectric layer 54 for wall charge accumulation is formed on the lower substrate 42 on which the address electrode 52 is formed. The partition wall 56 is formed on the lower dielectric layer 54, and the phosphor 58 is coated on the lower dielectric layer 54 and the partition wall 56. The partition wall 56 is formed in parallel with the address electrode 52 to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor 58 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided by the upper substrate 40, the lower substrate 42, and the partition wall 56.

The discharge cell of this structure is selected by the counter discharge between the address electrode 52 and the scan / sustain electrode 44 and then sustains the discharge by the surface discharge between the pair of sustain electrodes 44 and 46 facing in the diagonal direction. In such a discharge cell, the fluorescent material 58 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted outside the discharge cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

Referring to FIG. 6, the PDP according to the second embodiment of the present invention has the same components except that the holes 60 penetrating through the transparent electrodes 44A and 46A are formed as compared to the PDP shown in FIG. 5. It is provided.

The transparent electrodes 44A and 46A are made of a transparent conductive material having a relatively wide width and good light transmittance of 90% or more. Bus electrodes 44B and 46B having a relatively narrow width are formed on the transparent electrodes 44A and 46A. Since the bus electrodes 44B and 46B have high self resistivity of the transparent electrodes 44A and 46A, the bus electrodes 44B and 46B lower the discharge voltage by reducing them. To this end, the bus electrodes 44B and 46B are formed of silver (Ag) or copper (Cu) to compensate for the resistive components of the transparent electrodes 44A and 46A. The scan / hold electrode 44 and the common sustain electrode 46 are formed of the transparent electrodes 44A and 46A and the bus electrodes 44B and 46B.

The transparent electrodes 44A and 46A are formed in a diagonal direction of the discharge cells, and holes 60 penetrating through the transparent electrodes 44A and 46A are formed on the transparent electrodes 44A and 46A. The hole 60 is formed of various polygons including a triangle. As a result, the electrode area is reduced compared to the prior art, the power consumption is reduced and the discharge efficiency is increased. In addition, since the discharge occurs in the diagonal direction of the discharge cell, the brightness is increased. That is, the discharge is evenly distributed in the discharge cell, thereby increasing the brightness and efficiency.

As described above, the plasma display panel according to the present invention forms a transparent electrode constituting the sustain electrode pair in the diagonal direction of the cell. As a result, the discharge area is wider than before, so that the luminance and efficiency can be improved.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (5)

A transparent electrode included in each of the sustain electrode pairs for sustain discharge on the substrate and formed in a diagonal direction of the discharge cell; And a hole penetrating the transparent electrode. delete The method of claim 1, The hole is a plasma display panel, characterized in that formed in a triangle. The method of claim 1, And the sustain electrode pair includes a bus electrode formed on the transparent electrode. The method of claim 1, A second substrate formed to face the substrate; Barrier ribs formed between the substrate and the second substrate; And an address electrode formed on the second substrate so as to be orthogonal to the sustain electrode pair.