KR100659092B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to suppress diffusion of Ag particles by inserting a black bus electrode between a transparent electrode and a white bus electrode and forming black bus electrodes at both sides of the white bus electrode. A first and second substrates(110,120) are separated from each other and are disposed in parallel to each other in order to form a discharge space. A barrier rib(113) is used for forming a plurality of discharge cells for defining spaces between the first and second substrates in order to prevent crosstalk between the discharge cells. A plurality of transparent electrode pairs(125) are formed in parallel to each other on the second substrate. A plurality of bus electrode pairs include black bus electrodes(126) formed in parallel to the plurality of transparent electrode pairs on a discharge cell side of the transparent electrodes, and white bus electrodes(127) formed on the black bus electrodes. A plurality of address electrodes(115) are formed perpendicularly to the plurality of transparent electrode pairs on the discharge cell side of the first substrate. The black bus electrodes are formed on at least one side of the white bus electrodes.

Description

Plasma display panel {Plasma display panel}

1 is a diagram illustrating a plasma display panel having a conventional bus electrode in which halation occurs.

FIG. 2 is a diagram showing the shape of a pattern portion in a peak pattern by halation. FIG.

3 is a diagram showing panel discoloration due to silver (Ag) diffusion of a white bus electrode.

4 is a diagram illustrating a bus electrode structure according to an exemplary embodiment of the present invention.

5 is a view showing a path of visible light in the plasma display panel having a bus electrode structure according to an embodiment of the present invention.

Brief description of symbols for the main parts of the drawings

110: first substrate 112: first dielectric layer

113: partition wall 114: phosphor layer

115: address electrode 120: second substrate

122: second dielectric layer 124: protective film

125 transparent electrode 126 black bus electrode

126a: silver particles 126b, 127b: frit particles

127a: ruthedium (Ru) particles 127: white bus electrode

128: Black stripe

The present invention relates to a plasma display, and more particularly to a plasma display having an improved structure of a black bus electrode and a white bus electrode.

Plasma display device is a process of encapsulating a discharge gas between the two substrates of the plasma display panel having a plurality of electrodes and applying a discharge voltage to generate a vacuum ultraviolet light by the discharge, and exciting the phosphor formed by the vacuum ultraviolet light in a predetermined pattern A device that displays a desired image using visible light generated by the. Plasma display devices have been spotlighted as large-scale flat panel display devices because they can be thinned and can realize high-quality large screens having a wide viewing angle.

FIG. 1 is a view showing a plasma display panel having a conventional bus electrode in which halation occurs, FIG. 2 is a view showing a pattern portion shape in a peak pattern caused by halation, and FIG. 3 is a white bus electrode. It is a figure which shows the discoloration of a panel by silver (Ag) diffusion.

Referring to the drawings, the plasma display panel includes a front panel and a rear panel.

In the case of the reflective plasma display panel, the front panel includes a plurality of sustain electrode pairs 25, 26, 27 formed in a direction orthogonal to the address electrodes 15. The sustain electrode pairs 25, 26, 27 are transparent electrode pairs 25 again causing discharge; In order to reduce the line resistance of the transparent electrodes 25, a plurality of bus electrodes 26 and 27 made of metal are formed on the bottom surface of the transparent electrode 25 in parallel with the transparent electrode 25.

The bus electrodes 26 and 27 are sustained electrodes 25 to prevent the visible light emitted from the phosphor layer 14 from being reflected or refracted by the white bus electrodes 27 made of a material such as silver (Ag), thereby reducing the clear room contrast. ) And the white bus electrode 27 is interposed between the black bus electrode 26.

In general, the white bus electrode 27 includes a solid and an organic vehicle serving as a medium for dispersing the solid. The solid content further includes silver (Ag) particles 27a as a conductive functional component, a glass frit 27b serving as a medium while uniformly surrounding the functional components in the firing process, and an additive.

However, the particle size of the Ag particles 27a of the white bus electrode 27 is 5 μm or more, and the particle size of the frit particle 27b is also 5 μm or more, so that many voids are formed between the bus electrode films, resulting in poor conductivity. Many pinholes occur. Therefore, in order to compensate for this, the thickness of the white bus electrode 27 is increased. This is because the Ag particles 27a are diffused from the white bus electrode 27 to cover both sides of the black bus electrode 26, thereby making the panel appear yellow. There was a problem of discoloration.

Further, when a discharge occurs to generate a peak white pattern S1 and visible light is generated from the phosphor layer 14 in the discharge cell, some visible light L1 is imaged in the desired area S1. On the other hand, some visible light (L2) is incident or refracted or reflected on the bottom or side surface of the white bus electrode 27, and then refracted and reflected on the second dielectric layer 22 and the protective film 24 As shown in FIG. 2, there is a problem in that a halation phenomenon occurs that affects the surroundings S2 of the current discharge cell.

An object of the present invention is to provide a plasma display panel in which a black bus electrode is interposed between a transparent electrode and a white bus electrode, and black bus electrodes are provided on both sides of the white bus electrode.

In order to achieve the above object and various other objects, the present invention is the first substrate and the second substrate spaced apart from each other at a predetermined interval to face in parallel to form a discharge space; Barrier ribs forming a discharge cell for partitioning a space between the first substrate and the second substrate, and preventing cross talk between the discharge cells; A pair of transparent electrodes formed in parallel with each other in a direction extending from the discharge cell side surface of the second substrate; A pair of bus electrodes comprising a black bus electrode formed on the discharge cell side of the transparent electrode in a direction parallel to the transparent electrode and a white bus electrode formed on the black bus electrode; And an address electrode formed on a discharge cell side surface of the first substrate in a direction orthogonal to the transparent electrode pair, and a plasma display panel having the black bus electrode formed on at least one side of the white bus electrode. to provide.

The plasma display panel may be an AC driving plasma display panel further including a dielectric layer applied on the second substrate to fill the transparent electrode pair and the bus electrode pair.

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

4 is a diagram illustrating a bus electrode structure according to an exemplary embodiment of the present invention, and FIG. 5 is a diagram illustrating a path of visible light in a plasma display panel having a bus electrode structure according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the front panel includes a transparent second substrate 120; A plurality of transparent electrode pairs 125 formed below the second substrate 120 in a direction orthogonal to the address electrodes 115; A plurality of bus electrodes 126 and 127 made of a metal material formed on a lower surface of the transparent electrode 125 in parallel with the transparent electrode 125 to reduce the line resistance of the transparent electrodes 125; A second dielectric layer 122 coated to fill the transparent electrode 125 and the bus electrodes 126 and 127; A protective film 124 applied over the dielectric layer 122; And a black stripe 28 formed under the second substrate 120 at a position corresponding to the partition wall.

The back panel includes a first dielectric layer 113 filling the first substrate 110 and the plurality of address electrodes 115 and the address electrodes 115 formed parallel to each other at predetermined intervals on the upper surface of the first substrate 110. And partitions the discharge space to form discharge cells, and is applied to the barrier rib 113 and the inner wall of the discharge cell to prevent electrical and optical interference between the discharge cells, and the ultraviolet rays emitted as the excited discharge gas is stabilized are red (R), The phosphor layer 114 converts into green (G) and blue (B) ultraviolet rays and emits the light.

At this time, the bus electrodes 126 and 127 are provided with the sustain electrode (B) to prevent the visible light contrast from the phosphor layer 114 being reflected or refracted by the white bus electrode 127 made of a material such as silver (Ag). The black bus electrode 126 is interposed between the 125 and the white bus electrode 127.

As shown in FIG. 4, black bus electrodes 126 are formed on both side surfaces of the white bus electrode 127. In addition, the height of the black bus electrodes 126 on both sides is preferably higher than the horizontal plane of the white bus electrodes 125.

As a modification, the black bus electrode 126 may be formed only on one side of the discharge cell side of the white bus electrode 127.

In general, the white bus electrode 127 includes Ag particles 127a as a conductive functional component, a glass frit 127b serving as a medium while uniformly surrounding the functional components in the firing process, and an additive. It consists of an organic medium that serves as a medium for dispersing the solid content in the solid state and paste (paste) state.

The bus electrodes 126 and 127 generally use a squeegee to print and dry black Ag, a squeegee to print and dry white Ag, and then expose, develop, and fire the same. Are manufactured. Before the calcination process, the organic medium serves as a medium of solid content, and in certain processes, the glass medium 127b is hardened while being de-bindered to replace the medium role.

As shown in FIG. 4, the bus electrode structure has a shape in which the white bus electrode 127 is inserted into the black bus electrode 126 having a? -Shape. Discoloration of the panel can be prevented by preventing the diffusion of 127a).

Hereinafter, the function and operation of the plasma display panel having such a configuration will be described.

Plasma discharge occurs when a specific discharge cell is selected and sustain discharge is initiated. When ionizing the discharge gas, ionized atoms are stabilized to generate vacuum ultraviolet rays. Vacuum ultraviolet light is incident on the phosphor layer 114 applied in the discharge cell, and the phosphor emits visible light.

The emitted visible light extends to various areas L10 and L20 of the front panel. The visible light L10 transmitted between the pair of transparent electrodes 125 or the transparent electrode 125 produces an image of a desired cell, and the bus electrode Visible light (L20) incident on the side of (126, 127) is absorbed by the black bus electrode 126, the amount of reflection or refraction is significantly reduced.

Unlike the conventional bus electrode structure, in the exemplary embodiment of the present invention, only the visible light incident to the center portion of the white bus electrode 126 is reflected or refracted to cause halation, thereby minimizing the occurrence of halation as a whole. .

In addition, even when the black bus electrode 127 is formed only on one side of the discharge cell side of the white bus electrode 126, the black bus electrode 127 absorbs visible light, which has conventionally generated halation, to reduce the occurrence of halation. have.

The AC reflective plasma display panel having the improved bus electrode structure described above becomes an AC transmissive plasma display panel when the second substrate 120 is the rear panel and the first substrate 110 is the front panel. The present invention can also be applied to a transmissive plasma display panel.

In addition, the present invention may also be applied to a DC driving plasma display panel in which discharge electrodes are exposed without using the dielectric layers 112 and 122.

The present invention is not limited to the example described above, and can be applied to any plasma display panel including the bus electrodes 126 and 127 in the sustain electrode 125.

According to the plasma display panel according to the present invention, a black bus electrode is interposed between the transparent electrode and the white bus electrode, and a bus electrode structure in which black bus electrodes are formed on both sides of the white bus electrode is provided.

Accordingly, discoloration of the panel can be prevented by preventing Ag particles, which are present on both sides of the white bus electrode, from diffusing and flowing down.

In addition, the generation of halation can be minimized by absorbing visible light, which has been incident to the side of the white bus electrode and causing halation, in the black bus electrode.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (2)

A first substrate and a second substrate spaced apart from each other at a predetermined interval to face each other in parallel to form a discharge space; Barrier ribs forming a discharge cell for partitioning a space between the first substrate and the second substrate, and preventing cross talk between the discharge cells; A pair of transparent electrodes formed in parallel with each other in a direction extending from the discharge cell side surface of the second substrate; A pair of bus electrodes comprising a black bus electrode formed on the discharge cell side of the transparent electrode in a direction parallel to the transparent electrode and a white bus electrode formed on the black bus electrode; And And an address electrode formed on the discharge cell side surface of the first substrate in a direction orthogonal to the transparent electrode pair, wherein the black bus electrode is formed on at least one side surface of the white bus electrode. The method of claim 1, The plasma display panel further comprises a dielectric layer applied on the second substrate to fill the transparent electrode pair and the bus electrode pair.

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