KR100581922B1 - Transmission Type Plasma Display Panel - Google Patents

Abstract

 A transmissive plasma display panel is disclosed. The disclosed plasma display panel includes a first dielectric layer formed on a rear substrate, a plurality of sustain electrode pairs provided on the rear substrate in a predetermined pattern, and a top surface of the back substrate on which the sustain electrode pairs are formed, and filling the sustain electrode pairs. A protective layer formed on an upper surface of a dielectric layer, a transparent front substrate coupled to the rear substrate, a plurality of address electrodes formed on a bottom surface of the front substrate in a direction orthogonal to the sustain electrode pair, and a front substrate on which the address electrodes are formed. A plurality of barrier ribs formed on the bottom surface of the second dielectric layer filling the address electrode, spaced apart at predetermined intervals from the bottom surface of the second dielectric layer to partition the discharge space, and separated by the barrier rib; A red (R), green (G), blue (B) phosphor layer formed on the inner surface, and the red, green, blue phosphor At least one application area of the phosphor layer of the coating is different that the size and characteristics of the remaining phosphor layer.

According to the present invention as described above, the color temperature and color purity can be improved and the overall brightness of the panel can be improved.

Description

Transmissive Plasma Display Panel

1 is an exploded perspective view illustrating a partial ablation of a conventional reflective plasma display panel.

2 is a vertical cross-sectional view showing the internal structure of the conventional plasma display panel shown in FIG.

3 is an exploded perspective view illustrating a part of a general transmissive plasma display panel.

FIG. 4 is a vertical cross-sectional view illustrating an internal structure of the transmissive plasma display panel shown in FIG. 3.

5 is a vertical cross-sectional view showing the internal structure of a transmissive plasma display panel according to a first embodiment of the present invention.

6 is a vertical cross-sectional view showing the internal structure of a transmissive plasma display panel according to a second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

210, 310: back substrate 213, 214, 313, 314: sustain electrode pair

216, 316: first dielectric layer 219, 319: protective layer

220, 320: front substrate 222, 322: address electrode

224, 324: bus electrodes 225, 325: bridge

226, 326: second dielectric layer 228, 328: partition wall

229, 329: side phosphor layer 230, 330: discharge space

232, 332, 334: auxiliary phosphor layer

The present invention relates to a transmissive plasma display panel, and more particularly, to a transmissive plasma display panel having an electron emission source for smoothly supplying electrons to a discharge space.

Plasma display panels (PDPs), which form images using electrical discharges, have excellent display performance, such as brightness and viewing angle, and their use is increasing day by day. In the plasma display panel, a discharge occurs in a gas between the electrodes by a direct current or an alternating voltage applied to the electrode, and phosphors are excited by the radiation of ultraviolet rays accompanying the gas discharge process to emit visible light.

1 and 2 illustrate a conventional general reflective plasma display panel. In FIG. 2, only the front substrate is rotated by 90 ° to more clearly show the internal structure of the plasma display panel of FIG. 1. As used herein, "front" means the direction in which the image is displayed.

1 and 2 together, a conventional plasma display panel includes a rear substrate 10 and a front substrate 20 facing each other. A plurality of address electrodes 11 are arranged on the top surface of the back substrate 10, and the address electrodes 11 are embedded by the first dielectric layer 12. In addition, a plurality of partitions 13 are formed on the upper surface of the first dielectric layer 12 at predetermined intervals from each other. The phosphor layer 15 is applied to the inner surface of the discharge space 14 partitioned by the partition 13 with a predetermined thickness.

The front substrate 20 is a transparent substrate through which visible light can be transmitted. The front substrate 20 is mainly made of glass and is coupled to the rear substrate 10 provided with the partition wall 13. On the bottom surface of the front substrate 20, sustain electrode pairs 21a and 21b orthogonal to the address electrodes 11 are formed. The sustain electrode pairs 21a and 21b are mainly made of a transparent conductive material such as indium tin oxide (ITO) to transmit visible light. In order to reduce the line resistance of the sustain electrode pairs 21a and 21b, bus electrode pairs 22a and 22b made of metal are formed on the bottom surface of each of the sustain electrode pairs 21a and 21b. The width is made narrower. The sustain electrode pairs 21a and 21b and the bus electrodes 22a and 22b are filled with a transparent second dielectric layer 23, and a protective layer 24 is formed on the bottom of the second dielectric layer 23.

However, in the conventional reflective plasma display panel, since the sustain electrode pairs are disposed on the bottom surface of the front substrate on which light is projected, there is a limit in the structure change to improve the luminous efficiency.

In order to overcome this problem, by arranging the sustain electrode pairs on the rear substrate and the address electrodes on the front substrate, it is easy to change the material and structure of the sustain electrode for improving luminous efficiency, and the visible light is formed from the phosphor layer and the front substrate. A transmissive plasma display panel having a structure through which light is transmitted through is emitted.

FIG. 3 is an exploded perspective view partially showing the above-described transmissive plasma display panel, and FIG. 4 is a vertical cross-sectional view illustrating an internal structure of the transmissive plasma display panel shown in FIG. 3. Meanwhile, in FIG. 4, only the rear substrate is rotated by 90 ° to clearly show the internal structure of the plasma display panel.

Referring to FIGS. 3 and 4, the transmissive plasma display panel includes a plurality of rear substrates 110 and front substrates 120 that are disposed to face each other and form a discharge space therebetween, and are formed in pairs on the rear substrates. The sustain electrode pairs 113 and 114 of the first dielectric layer 116 formed on the rear substrate to fill the sustain electrode, a protective layer 119 formed on an upper surface of the first dielectric layer, and a bottom surface of the front substrate. A plurality of address electrodes 122 orthogonal to the sustain electrode and connected to each other by a bridge 125, a second dielectric layer 126 formed on a bottom surface of the front substrate to fill the address electrodes; A plurality of barrier ribs 128 formed on the bottom surface of the second dielectric layer at predetermined intervals to partition the discharge space, and applied to the bottom surface of the second dielectric layer surrounding the discharge space and side surfaces of the barrier rib It is provided with a phosphor layer (129).

However, the following problems still exist in such a general transmissive plasma display panel.

First, due to the same coating area of the red, green, and blue phosphor layers applied to each discharge space, a difference in the intensity of light excited and emitted from each phosphor layer occurs due to the characteristics of the red, green, and blue phosphors themselves. There was a problem.

Second, in the case of a phosphor layer having a small light intensity, a white color temperature was low.

Third, due to the characteristics of the red, green, and blue phosphor layers, when each phosphor layer is formed with the same coating area, there is a problem that the color purity of the phosphor layer with weak light intensity is lower than that of other phosphor layers.

Fourth, there is a problem in that the white luminance of the entire panel is lowered due to the difference in characteristics between the phosphor layers.

In order to solve the above problems, the color temperature and color purity can be improved by changing the application area of at least one phosphor layer among red, green, and blue phosphor layers applied to the discharge space of the transmissive plasma display panel. It is an object to provide a transmissive plasma display panel.

In order to achieve the above object, a transmissive plasma display panel according to an embodiment of the present invention,

Back substrate;

A plurality of sustain electrode pairs disposed on the rear substrate in a predetermined pattern;

A first dielectric layer formed on an upper surface of the rear substrate on which the sustain electrode pairs are formed to fill the sustain electrode pairs;

A protective layer formed on an upper surface of the first dielectric layer;

A transparent front substrate coupled to the rear substrate;

A plurality of address electrodes formed on a bottom surface of the front substrate in a direction orthogonal to the sustain electrode pairs;

A second dielectric layer formed on a bottom surface of the front substrate on which the address electrode is formed and filling the address electrode;

A plurality of partition walls formed on the bottom surface of the second dielectric layer at predetermined intervals to partition discharge spaces and are separated; And

A phosphor layer of red (R), green (G), and blue (B) formed on the inner surface of each discharge space partitioned by the partition wall;

The coverage area of at least one phosphor layer of the red, green, and blue phosphor layers may be different from that of the remaining phosphor layers.

Here, at least one phosphor layer of the red, green, and blue phosphor layers may include a side phosphor layer formed on the partition wall and an auxiliary phosphor layer formed on a bottom surface of the second dielectric layer.

Optionally, at least one phosphor layer of the red, green, and blue phosphor layers may be continuously formed on the bottom surface of the barrier rib and the second dielectric layer.

The side phosphor layer formed on the partition wall is formed on an inner side surface of the partition wall.

The auxiliary phosphor layer may be selectively formed on the bottom surface of the second dielectric layer.

Specifically, the at least one phosphor layer is preferably a blue phosphor layer.

Optionally, the red phosphor layer is formed on the side surface of the barrier rib, and the green phosphor layer is selectively formed on the side surface of the barrier rib and the bottom of the second dielectric layer, and the blue phosphor layer is formed on the bottom surface of the barrier rib and the second dielectric layer. It may be formed continuously.

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

5 is a vertical cross-sectional view showing the internal structure of a transmissive plasma display panel according to a first embodiment of the present invention. In FIG. 5, only the rear substrate is rotated by 90 ° to clearly show the internal structure of the plasma display panel.

Referring to FIG. 5, the transmissive plasma display panel according to the first exemplary embodiment of the present invention may include a plurality of sustain electrode pairs 213 and 214 in a stripe shape provided on the rear substrate 210 and the rear substrate 210 in a predetermined pattern. ), A first dielectric layer 216 formed on an upper surface of the rear substrate on which the sustain electrode pair is formed, and filling the sustain electrode pair, the front substrate 220 coupled to the back substrate 210, and the transparent front substrate 220 and the front substrate 220. A plurality of stripe-shaped address electrodes 222 formed in a direction orthogonal to the sustain electrode pairs 213 and 214 on the bottom surface of the substrate is formed on the bottom surface of the front substrate 220 on which the address electrodes are formed to fill the address electrodes. A plurality of barrier ribs 228 are formed on the bottom surface of the second dielectric layer 226 at a predetermined interval to partition the discharge space 230 to prevent electrical and optical interference between the discharge spaces, and the barrier ribs 228. The phosphor layers 229 and 232 of red (R), green (G), and blue (B) formed on the inner surface of the discharge space 230 partitioned by the wall 228 are provided.

In the drawings, R, G, and B represent discharge spaces corresponding to phosphor layers of red, green, and blue, respectively.

In more detail, the first dielectric layer 216 may be formed by applying a white dielectric material to a thickness of approximately 15 μm to 40 μm on the upper surface of the back substrate 210.

Meanwhile, as shown in FIG. 5, a protective layer 219 is formed on an upper surface of the first dielectric layer 216. The protective layer 219 prevents the first dielectric layer 216 and the sustain electrode pairs 213 and 214 from being damaged by the sputtering of plasma particles and lowers the discharge voltage and the sustain voltage by emitting secondary electrons. do. The protective layer 219 may be formed by applying, for example, magnesium oxide (MgO) to a thickness of about 0.2 μm to 2 μm on the upper surface of the first dielectric layer 216.

The front substrate 220 is mainly made of glass as a transparent substrate through which visible light can be transmitted. In addition, Ne, Xe, or a mixed discharge gas thereof is injected into the discharge space 230, and red (R) is formed on the side surfaces of the partition wall 228 of the second dielectric layer 226 surrounding the discharge space 230. , Green (G) and blue (B) side phosphor layers 229 are applied to a predetermined thickness.

The stripe-shaped address electrode 222 disposed on the bottom surface of the front substrate 220 is made of indium tin oxide (ITO), which is a transparent conductive material to allow visible light to pass therethrough, but is disposed on the top surface of the back substrate 210. Since the sustain electrode pairs 213 and 214 do not require transparency, they may be made of a general conductive metal material.

Since the address electrode 222 is made of ITO, which is a transparent conductive material having a relatively high resistance as described above, a bus electrode 224 made of a highly conductive metal material is connected to each of the address electrodes 222 to reduce line resistance. It is preferable to be. The bus electrode 224 is also buried by the second dielectric layer 226 together with the address electrode 222. In addition, a bridge 225 is provided between the bus electrode 224 and the address electrode 222 to electrically connect them, and the bridge 125 has a plurality of predetermined intervals along the longitudinal direction of the bus electrode 224. Dogs can be provided. In addition, the bus electrode 224 may be disposed at a position corresponding to the partition wall 228 so as not to obstruct the transmission of visible light.

The configuration of the transmissive plasma display panel according to the present invention having such a configuration is largely divided into driving for address discharge and driving for sustain discharge. The address discharge occurs between the address electrode 226 disposed on the front substrate 220 and the sustain electrode 213 of any one of the pairs of sustain electrodes 213 and 214 disposed on the rear substrate 210, where wall charges are generated. Is formed. The sustain discharge is caused by the potential difference between the pair of sustain electrodes 213 and 214 located in the discharge space 230 in which the wall charges are formed. For reference, the sustain electrode 213 used for the address discharge is also referred to as the Y electrode, and the sustain electrode 214 used only for the sustain discharge is also referred to as the X electrode. The ultraviolet light generated from the discharge gas during the sustain discharge excites the phosphor layer 229 in the discharge space 230 to emit visible light, and the visible light passes through the phosphor layer 229 and the front substrate 220. By exiting to form an image that can be recognized by the user.

Here, the coating areas of the red, green, and blue phosphor layers formed in the respective discharge spaces are formed differently according to the type of the phosphor layer. However, the phosphor layer applied to the discharge space is basically formed on the side surface of the partition wall 228 partitioning the discharge space 230 regardless of whether the phosphor layer is red, green, or blue.

For example, when light is generated through the phosphor layer applied only to the sidewall of the partition wall 228, the intensity of light emitted to the front surface in the case of blue light is weak compared to other red or green light. In this case, in order to overcome the problem that the light intensity is not uniform, in particular, the coating area of the phosphor layer is increased in the discharge space 230 of the phosphor layer in which the phosphor having low light intensity is excited and emitted. First, the side phosphor layer 229 is applied to the side surface of the partition wall 228. In addition, in the discharge space where the intensity of visible light is weak, a phosphor layer is additionally formed to uniform the intensity of the visible light emitted from another discharge space.

As exemplarily shown in FIG. 5, in the discharge space corresponding to the blue (B) phosphor layer, the bottom surface of the second dielectric layer 226 is added to the side phosphor layer 229 formed by being applied to the side surface of the partition wall 228. The auxiliary phosphor layer 232 is applied to the film. Therefore, the coating area of the phosphor layer is wider in the discharge space of the blue phosphor layer than the area of the discharge space of the red (R) or green (G) phosphor layer. Therefore, the intensity of the blue light in the discharge space to which the blue phosphor layer is applied is relatively increased to increase the color temperature of white, and the light of the discharge gas (for example, Ne gas) in the discharge space of the blue phosphor layer is transferred to the second dielectric layer ( The color purity of the blue light is improved by being blocked by the auxiliary phosphor layer 232 with respect to blue formed on the bottom of 226.

6 is a vertical cross-sectional view showing the internal structure of a transmissive plasma display panel according to a second embodiment of the present invention. In FIG. 6, only the rear substrate is rotated by 90 ° to clearly show the internal structure of the plasma display panel.

The second embodiment shown in FIG. 6 differs from the first embodiment in FIG. 5 in that a discharge space to which the phosphor layer is additionally applied is added, and a discharge space having a different coating area is present. same.

That is, the transmissive plasma display panel according to the second embodiment of the present invention also includes a back substrate 310 and a front substrate 320 which are disposed to face each other. The rear substrate 310 and the front substrate 320 are spaced apart by a predetermined interval to form a discharge space 330 therebetween.

A plurality of sustain electrode pairs 313 and 314 are formed in a stripe shape on the top surface of the back substrate 320. The sustain electrode pairs 313 and 314 are buried by the first dielectric layer 316 formed on the top surface of the back substrate 310. Meanwhile, a protective layer 319 is formed on the top surface of the first dielectric layer 316 to cover the first dielectric layer. The protective layer 319 serves to prevent the first dielectric layer 316 and the sustain electrode pairs 313 and 314 from being damaged by the sputtering of plasma particles.

When the front substrate 320 is a transparent substrate through which visible light can be transmitted, mainly made of glass, a plurality of address electrodes 322 are formed on the bottom thereof in a stripe shape orthogonal to the sustain electrode pairs 313 and 314. do. A second dielectric layer 326 is formed on the bottom surface of the front substrate 320 on which the address electrode 322 is formed. Each of the address electrodes 322 is preferably connected to a bus electrode 324 made of a metal material having excellent conductivity, and a bridge 325 for electrical connection between the bus electrode 324 and the address electrode 322. Is prepared.

In addition, on the bottom surface of the second dielectric layer 326, like the first embodiment shown in FIG. 5, a plurality of partition walls partitioning the discharge space 330 to prevent electrical and optical interference between the discharge spaces 330. 328 are formed at predetermined intervals from each other. Ne, Xe, or a mixed discharge gas thereof is injected into the discharge space 330, and red is formed on the bottom surface of the second dielectric layer 326 surrounding the discharge space 330 and the side surface of the partition wall 328, respectively. At least one phosphor layer selected from phosphor layers 329 of (R), green (G), and blue (B) is applied with different coating areas and predetermined thicknesses.

The protective layer 319 is preferably magnesium oxide (MgO).

In the second embodiment of the present invention illustrated by way of example in FIG. 6, the side surface of the partition wall 328 is similar to the first embodiment in that the side phosphor layer 329 is basically formed, but the second dielectric layer ( The auxiliary phosphor layer is applied to the bottom surface of 326 and the case where the auxiliary phosphor layer is not applied. Furthermore, even if the auxiliary phosphor layer is applied to the bottom surface of the second dielectric layer 326, the auxiliary phosphor layer 332 having a large coating area is formed. It is a modified form in that it is divided into an auxiliary phosphor layer 334 applied only to a partially selected area so that the application area is small.

According to the second exemplary embodiment illustrated in FIG. 6, the blue (B) phosphor layer is applied to the bottom surface of the side phosphor layer 329 and the second dielectric layer 326 formed on the side surface of the partition wall 328. The auxiliary phosphor layer 332 has a large coating area, and the green (G) phosphor layer is an optional region of the bottom surface of the side phosphor layer 329 and the second dielectric layer 326 formed on the side surface of the partition wall 328. It consists of an auxiliary phosphor layer 334 having a relatively small coating area. Therefore, the green phosphor layer has a smaller coating area than the blue phosphor layer. Furthermore, since the red (R) phosphor layer is composed of only the side phosphor layer 329 formed on the side surface of the partition wall 328, the application area is the smallest among the three kinds of phosphor layers.

By controlling the coating area of the phosphor layer through the structure of the phosphor layer, the difference in the intensity of visible light generated by excitation and divergence of the phosphor layer is compensated and becomes uniform. By way of example, in the second embodiment, the application area of the blue phosphor layer having the weakest visible light intensity is the widest, and then the application area of the green phosphor layer having the weakest intensity is smaller than the application area of the blue phosphor layer, The red phosphor layer with the strongest visible light intensity has the smallest coating area. On the other hand, due to the difference between the presence of the auxiliary phosphor layer and the application area thereof, the degree of light of the discharge gas corresponding to each phosphor layer is blocked at the bottom of the second dielectric layer 326, which is, in turn, red, green, and blue light. It is offset by the difference in its own color purity, and the overall color purity is constant.

On the other hand, the present invention is not necessarily limited to the blue phosphor layer or the green phosphor layer described in the first embodiment and the second actual embodiment, as long as the phosphor layer is formed so as to be different from the phosphor layer.

As described above, according to the present invention, regardless of the characteristics of the light generated in the discharge space in which the red, green, and blue phosphor layers are formed, the light intensity becomes uniform and the color temperature of white becomes high.

In addition, in the same coating area, the light of the discharge gas is blocked by the auxiliary phosphor layer formed on the bottom of the second dielectric layer in the discharge space to which the phosphor layer having low light intensity is applied, thereby improving the color purity of the light. Luminance increases.

In addition, by adopting the transmissive plasma display panel, the sustain electrodes are arranged on the back substrate, so that the sustain electrodes can be formed of a metal material having excellent conductivity and low resistance, so that the discharge response speed is increased, and signal distortion and sustain discharge are required. Power consumption will be reduced.

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 (7)

Back substrate; A plurality of sustain electrode pairs disposed on the rear substrate in a predetermined pattern; A first dielectric layer formed on an upper surface of the rear substrate on which the sustain electrode pairs are formed to fill the sustain electrode pairs; A protective layer formed on an upper surface of the first dielectric layer; A transparent front substrate coupled to the rear substrate; A plurality of address electrodes formed on a bottom surface of the front substrate in a direction orthogonal to the sustain electrode pairs; A second dielectric layer formed on a bottom surface of the front substrate on which the address electrode is formed and filling the address electrode; A plurality of partition walls formed on the bottom surface of the second dielectric layer at predetermined intervals to partition the discharge space into a predetermined size; And A phosphor layer of red (R), green (G), and blue (B) formed on the inner surface of each discharge space partitioned by the partition wall; And an application area of at least one phosphor layer among the red, green, and blue phosphor layers is different from that of the remaining phosphor layers. The method of claim 1, At least one phosphor layer of the red, green, and blue phosphor layers includes a side phosphor layer formed on the partition wall and an auxiliary phosphor layer formed on a bottom surface of the second dielectric layer. The method of claim 1, And at least one phosphor layer of the red, green, and blue phosphor layers is continuously formed on the bottom surface of the barrier rib and the second dielectric layer. The method of claim 2, And a side phosphor layer formed on the partition wall is formed on an inner sidewall of the partition wall. The method of claim 2, The auxiliary phosphor layer is selectively formed on the bottom surface of the second dielectric layer. The method of claim 2 or 3, And said at least one phosphor layer is a blue phosphor layer. The method of claim 1, The red phosphor layer is formed on the sidewall of the barrier rib, and the green phosphor layer is selectively formed on the sidewall of the barrier rib and the bottom of the second dielectric layer, and the blue phosphor layer is continuously formed on the bottom surface of the barrier rib and the second dielectric layer. Transmissive plasma display panel characterized in that.

Images