KR100615231B1 - Transmission Type Plasma Display Panel - Google Patents

Abstract

 A transmissive plasma display panel is disclosed. The disclosed plasma display panel includes a back substrate formed of a metal, an insulating layer formed on an upper surface of the back substrate, a plurality of sustain electrode pairs provided in a predetermined pattern on the insulating layer, and an upper surface of the insulating layer on which the sustain electrode pairs are formed. A first dielectric layer formed to fill the sustain electrode pair, a protective layer formed on an upper surface of the first dielectric layer, a transparent front substrate coupled to the rear substrate, and in a direction orthogonal to the sustain electrode pair on the bottom surface of the front substrate; A plurality of address electrodes to be formed; a second dielectric layer formed on a bottom surface of the front substrate on which the address electrodes are formed; And a phosphor layer applied to a bottom surface of the second dielectric layer surrounding the discharge space and a side surface of the partition wall. It should. According to the present invention, the rear substrate is formed of a metal so that the displacement current is blocked, the reflectivity of the rear substrate is improved, the luminance is increased, and the thermal conductivity performance is 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.

FIG. 5 is an exploded perspective view partially showing a transmissive plasma display panel according to a first exemplary embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view illustrating an internal structure of a transmissive plasma display panel according to the first embodiment shown in FIG. 5.

FIG. 7 is an exploded perspective view partially showing a transmissive plasma display panel according to a second exemplary embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view illustrating an internal structure of the transmissive plasma display panel according to the second embodiment shown in FIG. 7.

Explanation of symbols on the main parts of the drawings

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

215, 315: heat radiation fins 216, 316: first dielectric layer

217, 317: insulation 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

230, 330: discharge space 318: heat conduction unit

The present invention relates to a transmissive plasma display panel, and more particularly, to a transmissive plasma display panel of which the back substrate is made of a metal material.

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, the 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 pair is 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 rear substrate 110 and a front substrate 120 made of glass, which are disposed to face each other and form a discharge space therebetween, and are paired on the rear substrate. A plurality of sustain electrode pairs 113 and 114 formed, a 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 the front substrate A second dielectric layer orthogonal to the sustain electrode at a bottom of the second electrode layer 124 formed on the bottom surface of the front substrate and a plurality of address electrodes 122 connected to each other by a bridge 125 ( 126), 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 the bottom surface of the second dielectric layer surrounding the discharge space and the gap. The provided with a phosphor layer 129 coated on the side.

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

First, since the front substrate and the rear substrate are made of glass, heat generated through the discharging process is not easily released to the outside, thereby degrading the performance of the apparatus inside the panel.

Second, there is a problem in that power efficiency is lowered due to a lot of unnecessary current flowing to the back substrate made of glass, that is, reactive current.

The present invention has been made to solve the above problems, in particular, the rear substrate is formed of a metal, and having a heat dissipation portion on the bottom surface of the rear substrate has a structure that can easily discharge heat generated from the panel to the outside It is an object of the present invention 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,

A back substrate formed of a metal;

An insulation layer formed on an upper surface of the back substrate;

A plurality of sustain electrode pairs disposed on the insulating layer in a predetermined pattern;

A first dielectric layer formed on an upper surface of the insulating layer 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 define a discharge space;

And a phosphor layer applied to a bottom surface of the second dielectric layer surrounding the discharge space and a side surface of the partition wall.

Here, the back substrate is preferably formed of any one metal selected from the group consisting of Ni, Cr, Al, Cu.

Optionally, a heat dissipation part mounted on the bottom surface of the rear substrate and dissipating heat may be further provided.

In particular, the heat radiating portion is preferably a plurality of heat radiating fins (fin).

In addition, the heat radiation fins are preferably in the form of a stripe.

The heat dissipation fins are formed spaced apart at predetermined intervals.

Here, the heat dissipation fins are preferably arranged to maximize the heat dissipation area.

On the other hand, the heat radiating portion may be integrally formed on the back substrate.

In addition, the partition wall may be integrated into the back substrate by a method of electroplating. A lower portion of the heat dissipation portion may further include a thermal conductive portion for increasing thermal conductivity.

The thermally conductive portion is preferably formed of a material having high thermal conductivity.

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

FIG. 5 is an exploded perspective view partially illustrating a transmissive plasma display panel according to a first exemplary embodiment of the present invention, and FIG. 6 illustrates an internal structure of the transmissive plasma display panel according to the first exemplary embodiment shown in FIG. 5. Vertical section. In FIG. 6, only the rear substrate is rotated by 90 ° to clearly show the internal structure of the plasma display panel.

5 and 6, the transmissive plasma display panel according to the first embodiment of the present invention has a rear substrate 210, an insulating layer 217 formed on an upper surface of the rear substrate, and a predetermined pattern on the insulating layer. A plurality of stripe-shaped sustain electrode pairs 213 and 214 are formed, a first dielectric layer 216 formed on an upper surface of the insulating layer on which the sustain electrode pair is formed, and filling the sustain electrode pair, and coupled to the rear substrate 210. And the transparent front substrate 220, the plurality of address electrodes 222 having a stripe shape formed in a direction orthogonal to the sustain electrode pairs 213 and 214 on the bottom surface of the front substrate 220, and the front surface where the address electrodes are formed. The second dielectric layer 226 formed on the bottom surface of the substrate 220 to fill the address electrode and spaced apart at predetermined intervals on the bottom surface of the second dielectric layer to partition the discharge space 230 may be electrically and optically formed between the discharge spaces. A plurality of partition walls for preventing interference 228, and surrounding the discharge space is provided with a phosphor layer 229 coated on the bottom face and side face of the partition wall 228 of the second dielectric layer 226.

The back substrate 210 is formed of a metallic material. In particular, the back substrate 210 may be formed of a metal such as Ni, Cr, Al, Cu, or an alloy thereof.

In the case of a general transmissive plasma display panel, since the rear substrate is made of glass, there is no problem because the rear substrate is not electrically conductive even when a pair of sustain electrodes is provided on the upper surface of the rear substrate. However, according to the first preferred embodiment of the present invention shown in FIGS. 5 and 6, if the sustain electrode pairs 213 and 214 are directly installed on the back substrate 210 of metal material, the back substrate may be electrically conductive. In order to prevent this, an insulating layer 217 is formed on the top surface of the back substrate 210. The insulating layer 217 is formed of an electrically insulating material.

Meanwhile, the first dielectric layer 216 formed on the top surface of the insulating layer 217 on which the sustain electrode pairs 213 and 214 are formed has a white dielectric material of about 15 μm to 40 μm on the top surface of the insulating layer 217. It can be formed by applying to a thickness of a degree.

5 and 6, 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 discharge gas mixed therein is injected into the discharge space 230, and a phosphor layer is disposed on the bottom surface of the second dielectric layer 226 surrounding the discharge space 230 and the sidewall of the partition wall 228. 229 is applied to a predetermined thickness.

Meanwhile, 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, whereas on the upper surface of the back substrate 210, The arranged sustain electrode pairs 213 and 214 do not require transparency, and thus may be formed of a general conductive metal material. Therefore, as described above, the insulating layer 217 is formed between the metal back substrate 210 and the sustain electrode pairs 213 and 214.

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.

Since the rear substrate 210 is formed of a metal, its own thermal conductivity is superior to that of glass, so heat generated from the rear substrate is more easily released than the glass from the rear substrate. 5 and 6, which is a first preferred embodiment of the present invention, a plurality of heat dissipation fins 215 for heat dissipation are operated as a heat dissipation part on the bottom surface of the rear substrate 210.

Heat transferred from the back substrate 210 to the heat dissipation fins 215 is dissipated through the heat dissipation region of the heat dissipation fins 215. The heat dissipation fin 215 may have various shapes to maximize the heat dissipation area. As shown in FIG. 6, the shape of the heat dissipation fin is preferably stripe, but is not limited thereto. The heat dissipation fins 215 are spaced apart at predetermined intervals in consideration of the heat dissipation area. If the heat radiation fins are installed too tightly, the heat radiation fins may have the adverse effect of blocking the heat dissipation path. If the heat radiation fins are too spaced apart, the heat dissipation area may be reduced. It is determined to increase the effect.

In the case of the stripe-type heat dissipation fin 215, attaching the edge portion of the narrow area to the back substrate 210 is one method of widening the heat dissipation area.

On the other hand, the heat radiation fin 215 is preferably formed integrally with the back substrate 210. This is because when the heat dissipation fin 215 is attached to the bottom surface of the back substrate 210 by using a separate adhesive means, heat transfer may be blocked from the adhesive means or the efficiency thereof may be reduced. However, if the adhesive means has excellent thermal conductivity, the back substrate 210 and the heat dissipation fin 215 may be separately manufactured and bonded.

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 referred to as a Y electrode, and the sustain electrode 214 used only for the sustain discharge is also referred to as an X electrode. The fluorescent layer 229 of the discharge space 230 is excited by the ultraviolet rays generated from the discharge gas during the sustain discharge, and a visible tube is emitted, and the visible light penetrates the phosphor layer 229 and the front substrate 220. As it exits, it forms an image that the user can recognize.

Here, heat is generated inside the panel by the electrical resistance of the discharge process and the conduction process to the electrode, and the heat is released into the air from the heat dissipation fin 215 through the back substrate 210 formed of a metal having thermal conductivity. .

In addition, the partition wall 228 may be formed of a metal material to improve heat transfer efficiency through the partition wall 228, and the partition wall 228 may be integrated with the back substrate 210 by an electroplating method. In this case, FIGS. 5 to 6 illustrate the partition wall 228 separated from the rear substrate for convenience of description, but the partition wall 228 is integrated with the rear substrate in a completely assembled state.

FIG. 7 is an exploded perspective view partially illustrating a transmissive plasma display panel according to a second exemplary embodiment of the present invention, and FIG. 8 is a vertical cross-sectional view illustrating an internal structure of the transmissive plasma display panel according to the second embodiment. In FIG. 8, only the rear substrate is rotated by 90 ° to clearly show the internal structure of the plasma display panel.

7 and 8 is a summary of the basic invention except that a separate heat conducting portion is further provided under the heat dissipation fin, which is a heat dissipation portion, as compared with the first embodiment shown in FIGS. 5 and 6. Is the 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.

An insulating layer 317 is formed on an upper surface of the back substrate 320, and a plurality of sustain electrode pairs 313 and 314 are formed in a stripe shape on the insulating layer. The insulating layer 317 electrically insulates the back substrate 310 from the sustain electrode pairs 313 and 314. The sustain electrode pairs 313 and 314 are buried by the first dielectric layer 316 formed on the top surface of the insulating layer 317. Meanwhile, a protective layer 319 is formed on the top surface of the first dielectric layer 316 to cover the first dielectric layer 316. 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.

The back substrate 310 may be formed of any one of Ni, Cu, Al, and Cr, or an alloy thereof. In addition, another metallic material having good thermal conductivity may be used as the back substrate 310. Since the insulating layer 317 is formed between the back substrate 310 and the glass electrode pairs 313 and 314, the displacement current does not flow to the metal substrate, thereby improving efficiency. On the other hand, the metallic back substrate improves the performance of reflecting visible light to the front surface of the panel due to the excellent reflectivity, which is a property of the metal, thereby increasing the luminance.

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 a bottom thereof in a stripe shape orthogonal to the sustain electrode pairs 313 and 314. . 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 metallic material having excellent conductivity, and a bridge 325 for electrical connection between the bus electrode 324 and the address electrode 322. Is prepared.

On the other hand, the protective layer 319 is preferably magnesium oxide (MgO).

As in the case of the first preferred embodiment of the present invention shown in FIGS. 5 and 6, in the second embodiment of the present invention exemplarily illustrated in FIGS. 7 and 8, heat is formed on the bottom surface of the rear substrate 310. A plurality of heat radiation fins 315 are provided in a stripe form as a heat radiation portion for emission. The plurality of heat dissipation fins 315 are spaced apart at predetermined intervals to increase the heat dissipation area. It is preferable that the plurality of heat dissipation fins 315 are integrally formed on the rear substrate 310. Optionally, the heat dissipation fins 315 may be adhered to the bottom surface of the back substrate 310 through an adhesive means having excellent thermal conductivity.

On the other hand, the other side of the heat dissipation fin 315, one side of which is connected to the rear substrate 310, that is, a lower heat conduction portion 318 may be further provided in order to improve thermal conductivity. The heat conductive portion 318 is preferably formed of a material having high thermal conductivity, and the heat dissipation fin 315 and the heat conductive portion 318 may be integrally formed of the same material to improve heat transfer efficiency, but may be thermally conductive. If it does not fall, it may be connected by other bonding means.

Therefore, the heat generated in the discharge space 330 is not mainly conducted to the front substrate 320 made of glass, but is mainly conducted to the rear substrate 310 having excellent thermal conductivity, and is primarily radiated by the heat dissipation fin 315. In addition, heat is effectively released to the outside of the panel by the heat conduction unit.

As described above, according to the present invention, since the back substrate is formed of a metallic material, the displacement current flowing through the existing glass substrate, that is, the reactive current is cut off, thereby improving efficiency.

In addition, since the metal has excellent reflectivity, the back substrate is formed of metal, so that the brightness of the panel is improved, and thus the efficiency is improved.

In addition, the back substrate is formed of a metal having excellent thermal conductivity, and in addition, heat inside the panel may be easily released to the outside by a heat dissipation fin and a heat conduction part for improving heat dissipation performance.                     

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 (11)

A back substrate formed of at least one metal selected from the group consisting of Ni, Cr, Al, and Cu; An insulation layer formed on an upper surface of the back substrate; A plurality of sustain electrode pairs disposed on the insulating layer in a predetermined pattern; A first dielectric layer formed on an upper surface of the insulating layer 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 a discharge space, and integrated into the rear substrate by an electroplating method; And a phosphor layer applied to a bottom surface of the second dielectric layer surrounding the discharge space and a side surface of the partition wall. delete The method of claim 1, And a plurality of heat dissipation fins mounted on the bottom surface of the rear substrate to emit heat. delete The method of claim 3, wherein The heat dissipation fins have a stripe shape. The method of claim 5, wherein The heat dissipation fins are spaced apart at predetermined intervals. The method of claim 6, The heat dissipation fins are arranged such that the heat dissipation area is maximized. The method of claim 3, wherein The heat dissipation fins are integrally formed on the back substrate. delete The method of claim 1, The lower portion of the heat dissipation portion is a transmissive plasma display panel, characterized in that further provided with a heat conductive plate for increasing the thermal conductivity. delete

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