KR100658746B1 - A plasma display panel - Google Patents

Abstract

The plasma display panel of the present invention improves luminous efficiency while maintaining external light reflection luminance at an appropriate level. The plasma display panel includes a first pixel and a second substrate disposed opposite to each other, and a set of pixels disposed between the first and second substrates. A partition wall arranged in a unit pixel forming a triangle, a phosphor layer formed in each unit pixel formed by the partition wall, an address electrode formed on the first substrate corresponding to each unit pixel, and intersecting with the address electrode. And a first electrode and a second electrode formed on a second substrate corresponding to both sides of the partition wall, wherein one of the first electrode and the second electrode is a bus electrode corresponding to one side of the partition wall; A transparent electrode protruding from the bus electrode into the pixel, and the other includes a bus electrode corresponding to the other side of the partition wall, and the bus It is connected to the pole of a transparent electrode and a bus electrode and integrally projecting the pixels inside an auxiliary bus electrodes formed on the transparent electrode.

Plasma, display, bus electrode, transparent electrode, auxiliary bus electrode

Description

Plasma Display Panel {A PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view illustrating a plasma display panel according to an embodiment of the present invention.

2 is a partial cross-sectional view taken along line A-A in a state in which a plasma display panel is coupled according to an embodiment of the present invention.

3 is a partial plan view illustrating a relationship between a partition and an electrode in a plasma display panel according to an exemplary embodiment of the present invention.

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 for improving luminous efficiency while maintaining external light reflection luminance at an appropriate level in a plasma display panel in which red, green, and blue unit pixels are arranged in a triangle. will be.

In general, a plasma display panel (hereinafter referred to as a 'PDP') displays an image using a gas discharge phenomenon and has excellent display capability such as display capacity, brightness, contrast, afterimage, viewing angle, and the like.

The PDP generates a gas discharge between the electrodes by applying a voltage to the sustain electrode and the scan electrode, excites the phosphor with vacuum ultraviolet rays emitted thereon, and realizes an image with visible light generated while the phosphor is stabilized.

The PDP seals the front substrate including the sustain electrode and the scan electrode and the back substrate including the address electrode with the partition wall therebetween, thereby forming a discharge cell by the partition wall, and inert gas (example) in the discharge cell. And a mixture of neon (Ne) and xenon (Xe).

When the PDP applies an address voltage to the address electrode and a scan pulse to the scan electrode, an address discharge occurs between two electrodes to select a discharge cell to be turned on, and at this time, a wall charge is formed. In this state, the sustain electrode and the scan electrode are formed. When the sustain pulse is applied to the electrode, the electrons and ions formed in the sustain electrode and the scan electrode are moved between the sustain electrode and the scan electrode. Cause discharge.

The PDP may be classified according to a unit pixel array pattern of red, green, and blue, and may be classified into a stripe type in which unit pixels partitioned by partition walls are arranged in a stripe pattern, and a delta type in which pixels are arranged in a triangular pattern. have.

This delta PDP forms each pixel in a hexagon, in order to arrange the unit pixels in a triangle. The delta type PDP arranges bus electrodes of the sustain electrode and the scan electrode corresponding to the partition walls, and transparent electrodes protruding toward the center of the pixel from the bus electrodes are disposed inside the pixels, respectively, and are transparent through the bus electrodes. Since an appropriate voltage is applied to the electrodes to generate sustain discharges between the opposing transparent electrodes, it is necessary to overcome the low conductivity of the transparent electrodes to induce strong discharges to improve luminous efficiency and to maintain external light reflection luminance properly.

SUMMARY OF THE INVENTION The present invention has been made as described above, and an object of the present invention is to provide a plasma display panel which improves luminous efficiency while maintaining external light reflection luminance at an appropriate level.

According to the present invention, a plasma display panel includes a first substrate and a second substrate disposed to face each other, a partition wall arranged between the first substrate and the second substrate to form a group of pixels in a triangle, and the partition wall A phosphor layer formed in each unit pixel, an address electrode formed on the first substrate corresponding to each unit pixel, and an address electrode intersecting the address electrode, and corresponding to both sides of the partition wall on the second substrate; And a first electrode and a second electrode, wherein one of the first electrode and the second electrode includes a bus electrode corresponding to one side of the partition wall and a transparent electrode protruding into the pixel from the bus electrode. A bus electrode corresponding to the other side of the partition wall, a transparent electrode protruding from the bus electrode into the pixel, and integrally connected with the bus electrode; Is an auxiliary bus electrodes formed on the transparent electrode.

In an exemplary embodiment, a sustain pulse is applied to the first electrode, a scan pulse is applied to the addressing period, a sustain pulse is applied to the sustain period, and the auxiliary bus electrode is provided. In this case, it is preferable that a start pulse is applied among the sustain pulses causing sustain discharge in the sustain section.

In addition, a sustain pulse is applied to the first electrode in the sustain period, the auxiliary bus electrode is provided, a scan pulse is applied to the addressing period, and a sustain pulse is applied to the sustain period. In this case, it is preferable that a start pulse is applied among the sustain pulses causing sustain discharge in the sustain section.

The unit pixel may be partitioned into a hexagon by the partition wall.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is a partially exploded perspective view illustrating a plasma display panel according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view taken along line A-A in a state in which a plasma display panel is coupled according to an embodiment of the present invention.

This PDP arranges the unit pixels, that is, the red pixel 8R, the green pixel 8G, and the blue pixel 8B in a triangle, thereby forming a set of pixels 8.

The PDP includes a first substrate (hereinafter, referred to as a "back substrate") and a second substrate (hereinafter, referred to as a "front substrate") constituting a vacuum container while being spaced in parallel with each other. A partition wall 6 is provided between the rear substrate 2 and the front substrate 4, and the partition wall 6 is formed by partitioning a plurality of pixels 8. Here, the set of pixels 8 is composed of three unit pixels 8R, 8G, and 8B arranged in a triangle as shown in FIG.

Although the unit pixels 8R, 8G, and 8B may have various shapes, the unit pixels 8R, 8G, and 8B have hexagons (on the x-y plane). Accordingly, the partition wall 6 constituting one unit pixel 8R, 8G, 8B is also formed in a hexagon, and correspondingly, the discharge space having each unit pixel 8R, 8G, 8B is also formed in a hexagon. .

Inner spaces of the unit pixels 8R, 8G, and 8B are filled with an inert gas (for example, a mixed gas of neon Ne and Xen) that generate vacuum ultraviolet rays during plasma discharge, and each unit pixel 8R, Phosphor layers 10R, 10G, and 10B are formed in 8G and 8B, respectively. The phosphor layers 10R, 10G, and 10B are formed on the bottom surface of the discharge space and the inner surface of the partition wall 6. The phosphor layers 10R, 10G, and 10B generate red, green, and blue visible light, respectively, by the vacuum ultraviolet rays.

In response to the unit pixels 8R, 8G, and 8B so as to cause plasma discharge in the unit pixels 8R, 8G, and 8B, the back substrate 2 is provided with an address electrode 12, and the front substrate 4 The first electrode 15 (hereinafter referred to as 'holding electrode') and the second electrode 16 (hereinafter referred to as 'scan electrode') are provided.

The address electrode 12 is formed long on the rear substrate 2 in one direction (y axis direction) corresponding to each of the unit pixels 8R, 8G, and 8B. Since the address electrode 12 is formed long in the y-axis direction, the address electrode 12 alternately corresponds to the center and the partition wall 6 of the unit pixels 8R, 8G, and 8B along the y-axis direction. The address electrodes 12 are formed in plural over the entire area of the back substrate 2, and the neighboring address electrodes 12 are each unit pixel 8R, 8G, 8B or partition 6 along the x-axis direction. Are arranged at intervals corresponding thereto. These address electrodes 12 form wall charges during address discharge and are covered with a dielectric layer 14 to be protected from discharge.

The address electrode 12 may be formed in various shapes. In the present embodiment, the line part 12a disposed between the partition wall 6 and the back substrate 10 along the y-axis direction, and the unit pixels 8R and 8G. And an expansion portion 12b disposed inside the 8B and having a width larger than that of the line portion 12a. The extension 12b may have the same shape as that of the unit pixels 8R, 8G, and 8B, that is, a hexagon.

The sustain electrode 15 and the scan electrode 16 intersect the address electrode 12 and are formed on the front substrate 4 to correspond to both sides of the partition 6. The sustain electrode 15 and the scan electrode 16 are each of the bus electrodes 15a and 16a formed along the shape of the partition wall 6, and from each of the bus electrodes 15a and 16a, each unit pixel 8R, The transparent electrodes 15b and 16b protrude toward the center of the 8G and 8B and face each other in a pair of the unit pixels 8R, 8G and 8B.

The bus electrodes 15a and 16a are made of an opaque material such as a metal having excellent conductance and are formed on the front substrate 4 along the shape of the partition wall 6. Accordingly, the bus electrodes 15a and 16a minimize the blocking of visible light emitted from the unit pixels 8R, 8G, and 8B during sustain discharge, thereby improving luminous efficiency and absorbing external light, thereby maintaining appropriate external light reflection luminance. .

The transparent electrodes 15b and 16b receive a voltage from the bus electrodes 15a and 16a to cause direct discharge in the unit pixels 8R, 8G and 8B. Therefore, the transparent electrodes 15b and 16b are preferably formed of indium tin oxide (ITO) having a high transmittance of visible light.

The sustain electrode 15 and the scan electrode 16 having the bus electrodes 15a and 16a and the transparent electrodes 15b and 16b are adjacent to the unit pixel 8R in the extending direction (y axis direction) of the address electrode 12. Are shared on 8G, 8B).

A sustain pulse is applied to the sustain electrode 15 in the sustain period, a scan pulse is applied to the scan electrode 16, and a sustain pulse is applied to the sustain period. The unit pixels 8R, 8G, and 8B are addressed by the scan pulses applied to the scan electrodes 16 and the address pulses applied to the address electrodes 12, and then the sustain electrodes 15 and the scan electrodes 16 are addressed. The address pixels 8R, 8G, and 8B are sustained and discharged by the sustain pulse applied. However, since the electrodes may perform their roles differently according to the signal voltage applied thereto, the present invention does not need to be limited to the above.

One of the sustain electrode 15 and the scan electrode 16 is formed of the bus electrodes 15a and 15a and the transparent electrodes 15b and 16b as described above, and the other further includes an auxiliary bus electrode. The auxiliary bus electrode blocks visible light in order to compensate for the conductivity of the transparent electrode, while inducing strong sustain discharge between the transparent electrodes 15b and 16b by supplementing the conductivity of the transparent electrode. In the present exemplary embodiment, since the auxiliary bus electrode 16c is provided on the scan electrode 16, the following description will be provided with reference to this. However, the auxiliary electrode may be provided on the sustain electrode 15.

When comparing the sustain electrode 15 and the scan electrode 16, the sustain electrode 15 formed of the bus electrode 15a and the transparent electrode 15b has a transmittance of visible light generated in the unit pixels 8R, 8G, and 8B. To improve the light emission efficiency, and the scan electrode 16 formed of the bus electrode 16a, the transparent electrode 16b, and the auxiliary bus electrode 16c has an auxiliary bus electrode 16c compared to the sustain electrode 15. By absorbing the external light to keep the external light reflectance lower than the visible light partially compensate for the strong discharge to improve the light emission efficiency.

The auxiliary bus electrode 16c is formed on the transparent electrode 16b integrally with the bus electrode 16a of the scan electrode 16, and a scan pulse and a sustain pulse applied to the bus electrode 16a are applied. The auxiliary bus electrode 16c is preferably formed of the same metal electrode as the bus electrode 16a and has excellent electrical conductance.

The sustain discharge is caused by the sustain pulse applied to the sustain electrode 15 and the scan electrode 16. When the scan electrode 16 has the auxiliary bus electrode 16c, the start pulse among the sustain pulses is the scan electrode ( Preferably applied to 16). That is, due to the high conductance of the auxiliary bus electrode 16c, a strong discharge is induced between the two transparent electrodes 15b and 16b to increase the luminous efficiency. In the same context, when the sustain electrode 15 has an auxiliary bus electrode (not shown), a start pulse of the sustain pulses is preferably applied to the sustain electrode 15.

The sustain electrode 15 and the scan electrode 16 are covered with a dielectric layer 18 on the front substrate 4 so as to accumulate wall charges during sustain discharge, and the dielectric layer 18 is separated from the sustain electrode 15 by plasma discharge. It is preferable that the scan electrode 16 is covered with the MgO protective film 20 so as to lower the discharge start voltage by increasing the secondary electron emission coefficient.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It goes without saying that it belongs to the scope of the present invention.

As described above, according to the plasma display panel of the present invention, a set of pixels are arranged in a triangle, and a sustain electrode provided in each pixel is formed of a bus electrode and a transparent electrode, and a scan electrode is provided of a bus electrode, a transparent electrode, and an auxiliary bus electrode. Thus, by absorbing the external light to one side of the auxiliary bus electrode to maintain a low external light reflection brightness, there is an effect of improving the luminous efficiency by inducing a strong discharge between the two transparent electrodes.

Claims (6)

A first substrate and a second substrate disposed to face each other; A partition wall disposed between the first substrate and the second substrate and partitioning unit pixels constituting a set of pixels in a triangle, the partition walls being partitioned into a hexagon; A phosphor layer formed in each unit pixel formed of the partition wall; An address electrode formed on the first substrate corresponding to each of the unit pixels; And A first electrode and a second electrode intersecting the address electrode and formed on a second substrate corresponding to both sides of the partition wall; The first electrode and the second electrode, A bus electrode extending while forming a valley in a zigzag shape along the partition wall in a direction crossing the address electrode; A transparent electrode which protrudes into an adjacent pixel up and down with the bus electrode interposed therebetween; An auxiliary bus electrode connected between the valleys inside the pixel; The auxiliary bus electrode is formed on only one of the first electrode and the second electrode based on the one unit pixel. The method of claim 1, A sustain pulse is applied to the first electrode in the sustain period, The second electrode includes a scan pulse applied to an addressing period, a sustain pulse applied to a sustain period, and the auxiliary bus electrode. The method of claim 2, The second electrode is a plasma display panel to which a start pulse is applied among the sustain pulses causing sustain discharge in the sustain period. The method of claim 1, The first electrode is provided with a sustain pulse in the sustain period and the auxiliary bus electrode, And a scan pulse applied to the second electrode and a sustain pulse applied to the sustain period. The method of claim 4, wherein The first electrode is a plasma display panel to which a start pulse is applied among the sustain pulses causing sustain discharge in the sustain period. delete

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