JP2000164148A - Rear face base board of plasma display panel(pdp) for improving heat radiating efficiency and structure of pdp using it and manufacture of pdp rear face base board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat radiating effect, and to reduce noise by constituting a plasma display panel of a metallic plate, and forming plural metallic projections on its one surface. SOLUTION: In a PDP, plural discharge cells are formed in a space between a front face base board 410 and a rear face base board. In the rear face base board, a base board 401 on which plural heat radiating fins 401a are protrusively formed is formed on one surface, and an insulating adhesive layer 402 is wholly stuck/formed on the other surface of the base board 401. Plural electrode layer 404 are formed at prescribed intervals on an upper surface of the adhesive layer 402, and plural barrier ribs 403 are respectively protrusively formed on the upper surface of the adhesive layer 402 between the electrode layers 404. The respective electrode layers 404 are address electrodes. A dielectric layer 405 is applied to the adhesive layer 402, upper surface of the respective electrode layers 404 and side walls of the respective barrier ribs 403, and a phosphor layer 406 is applied to a place surface corresponding to the respective cells of the dielectric layer 405.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device using a plasma display panel (PDP), and more particularly, to a rear substrate of a plasma display panel (PDP) capable of improving heat emission efficiency. Structure and Plasma Display Panel (PD) Using It
P) and a method of manufacturing the same.

[0002]

2. Description of the Related Art Recently, flat display devices such as a liquid crystal display device (LCD, a field emission display (FED)) and a plasma display panel (PDP) have been actively developed. Because it is simple, it is easy to manufacture, has high brightness and excellent luminous efficiency, has a memory function, has a wide viewing angle of 160 ° or more, and has a merit that a large screen of 40 inches or more can be realized. It is a display device that is receiving attention.

As shown in FIG. 6, such a conventional PDP includes a front substrate 10 for displaying characters and images, and a rear substrate 2 coated with a phosphor layer for emitting visible light.
The two glass substrates 0 and 0 are arranged to face each other, a space is formed between the two substrates, and a plurality of discharge cells 30 are formed in the space.

The rear substrate 20 has a plurality of partitions 21 linearly formed at predetermined intervals on the upper surface thereof. Address electrodes 22 are formed on the upper surface of the rear substrate 20 between the partition walls 21 in a direction along the partition walls, and a dielectric layer 23 is formed on each address electrode 22 and the upper surface of the rear substrate 20 so as to cover them. A phosphor 24 that generates light by the plasma discharge and is excited to emit light is applied. Each partition 21 plays a role of physically dividing each discharge cell 30.

The front substrate 1 facing the rear substrate 20
0, a plurality of transparent electrodes 11 are formed at predetermined intervals in a direction orthogonal to the direction of the address electrodes 22, and a dielectric layer 12 is formed on the upper surfaces of the transparent electrodes 11 and the front substrate 10.
Is formed, and a protective film 13 is further formed thereon. When a predetermined driving voltage is applied to each address electrode 22 and each transparent electrode 11, a plasma discharge is generated inside the discharge cell 30.

Thus, a PD having a plurality of discharge cells
When a voltage is applied to the electrodes of each discharge cell, P discharges light to display an image, so that a plurality of discharge cells are sandwiched between two glass base plates. The most important thing of a PDP is to manufacture a panel unit formed on a PDP.

In the conventional PDP thus configured, heat is generated when each discharge cell emits light to form an image. The generated heat is transmitted to the front and rear substrates 10 and 20 in front of the glass material. At this time, due to the characteristics of the glass, it is difficult to conduct heat in the plane direction of the panel, and the temperature of each activated discharge cell is reduced. Since the temperature of the inactive discharge cells does not rise so much while the temperature rises rapidly, the PD
The temperature of the panel surface of P is locally increased, and the discharge cells are thermally degraded. That is, since the temperature difference between the activated cell and the non-activated cell is very large, stress is applied to the panel unit, and in the worst case, the panel unit may be broken.

When the voltage applied to the electrodes of the discharge cells increases, the brightness of the discharge cells increases, but on the other hand, the generation of heat also increases. It is easily deteriorated and easily broken.

Therefore, methods for dissipating the heat of the panel unit of the PDP have been studied. As an example, in the heat dissipation structure 100 of the conventional PDP, as shown in FIG. A rear substrate 112,
A PDP unit 110 composed of a plurality of discharge cells 113 formed between the substrates, and a support plate 130 adhered to the back surface of the PDP unit 110 with a double-sided adhesive tape 120, and a heat conductive liquid 140 is provided between them. The structure was filled. The radiation fins 15 are provided on the entire back surface of the support plate 130.
0 was formed.

These PDPs are designed so that heat generated from the discharge cells 113 of the unit 110 is conducted through a heat conductive liquid 140 made of silicon grease and alumina, and then released through radiation fins 150. Had become.

[0011]

SUMMARY OF THE INVENTION Such a conventional PD
In the heat dissipating structure of P, the heat conductive liquid layer is inferior to a heat dissipating substance such as aluminum, and the heat conductive liquid layer has a thickness of several mm. They are not sufficiently transmitted to the fins 150 and are accumulated in the panel unit. Further, as the size of the panel increases, the thickness of the heat-conducting liquid layer increases, so that the temperature of the panel unit increases, and there is an inconvenience that the temperature increase of the PDP cannot be sufficiently solved.

Research has been conducted to reduce the thickness of the space formed between the panel unit 110 and the support plate 130.
The heat transfer efficiency to the heat was not improved, and a method to increase the heat dissipation effect by installing a cooling fan was also developed,
Since the life of the bearing of the cooling fan is shorter than that of the panel unit, there is an inconvenience that the bearing of the fan is replaced several times while the display device is used, which is extremely complicated.

Further, when the cooling fan is driven, a large amount of electric power is consumed, so that the noise level increases, and when the cooling fan or the heat radiating plate is installed, the volume and weight of the display device increase. There was also.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a rear substrate of a PDP capable of producing a PDP having an excellent heat radiation effect, a low noise level and a reduced weight and volume, and a use thereof. It is an object of the present invention to provide a PDP structure and a method of manufacturing a PDP rear substrate. Another object of the present invention is to improve the heat radiation effect of one of the two substrates constituting the PDP panel unit without attaching a separate heat radiation plate to the PDP panel unit. , PDP with reduced weight and thickness
P substrate, PDP structure using the same, and PDP
Attempt to provide a method of manufacturing a substrate. Further, another object of the present invention is to increase the heat radiation effect of the rear substrates of the two substrates constituting the panel unit of the PDP, and to provide a structure of the PDP using the rear substrates and a method of manufacturing the rear substrate of the PDP. Try to offer.

[0015]

In order to achieve the above object, a front substrate for displaying characters and images, a rear substrate disposed to face the front substrate, and a substrate formed between the front substrate and the rear substrate are formed. Plasma display panel (PD) according to the present invention including a plurality of discharge cells
P) The rear substrate is formed of a metal plate, and a plurality of metal ridges are formed on one surface and the rear surface thereof.

In the plasma display panel (PDP) according to the present invention, the rear substrate is formed of a metal plate, a plurality of metal ridges are formed on one surface of the metal plate, and the other surface is bonded. A plurality of electrode layers formed in parallel rows at predetermined intervals on the upper surface of the adhesive layer, and partition walls protrudingly formed on the upper surface of the adhesive layer between the electrode layers, and the adhesive layers A dielectric layer is formed on the upper surface of each electrode layer and the surface of each partition, and a phosphor layer is formed on the surface. Needless to say, the front substrates of the conventional structures are opposed to those structures.

[0017] In the plasma display panel (PDP) according to the present invention, a rear substrate comprising a metal plate and a plurality of metal ridges protruding from one surface of the metal plate; An adhesive layer formed on the other surface of the above; a plurality of electrode layers formed in parallel rows at predetermined intervals on the upper surface of the adhesive layer; and an upper surface of the adhesive layer between the electrode layers A partition; a dielectric layer formed on the adhesive layer, the upper surface of each of the electrode layers and a side wall of each partition; a phosphor layer formed on a surface of the dielectric layer; And a front substrate arranged in parallel.

Further, according to the present invention, a front substrate for displaying characters and images, a rear substrate disposed to face the front substrate, and a plurality of discharge cells formed between the front substrate and the rear substrate. Including plasma display panel (PD
P) The method of manufacturing a rear substrate includes a step of processing one surface of a metal plate to form a heat radiating portion including a metal ridge and a groove.

The method for forming the heat radiating portion includes a step of forming a photoresist pattern on one surface of the metal plate and a step of etching the metal plate at a portion exposed without being covered with the photoresist pattern. It is characterized by the following.

Another method of forming the heat radiating portion is to insert a metal substrate between the plurality of foils rotatably mounted on the rotating shaft while rotating the foil, and to rotate the metal substrate when each foil rotates. It is characterized by being partially worn.

According to the present invention, there are provided a front substrate for displaying characters and images, a rear substrate disposed to face the front substrate, and a plurality of discharge cells formed between the front substrate and the rear substrate. Plasma display panel (PD
In the method of manufacturing P), one surface of a metal plate is processed to form a heat radiating portion formed of metal ridges and grooves on the surface, and an adhesive layer is attached to the other surface of the metal plate. A plurality of parallel row-shaped electrode layers are formed at predetermined intervals on the upper surface, and a plurality of partition walls are formed to protrude on the upper surface of the adhesive layer between the electrode layers.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The rear substrate of the plasma display panel (PDP) according to the present embodiment is a metal plate 2
01, and as shown in FIG.
1 has a plurality of radiating fins 201a protrudingly formed on one surface.

In other words, in the past, a metal plate for a heat sink was attached to the back surface of the rear substrate of the PDP in order to improve the heat radiation characteristics of the PDP. According to the present invention, a metal plate having a plurality of heat radiation fins 201a protrudingly formed on one surface is used as a rear substrate of a PDP.

As described above, the display device using the PDP according to the present invention is characterized in that unevenness is formed on one surface of two substrates constituting the PDP. The substrate having such irregularities on the surface is not a front substrate for displaying characters and images on the entire surface, but a rear substrate formed to face the front substrate. The material of the rear substrate is preferably a metal substrate having excellent heat radiation characteristics. It is not necessary to use a metal as long as it has excellent heat radiation properties, but a metal is the best at the moment.

The PD according to this embodiment is
In the overall structure 300 of the rear substrate of P, as shown in FIG. 2, a plurality of heat radiation fins 301a are formed on one surface of the substrate 301, and the insulating adhesive layer 3 is formed on the other surface.
2, a plurality of electrode layers 304 are respectively formed at predetermined intervals on the upper surface of the insulating adhesive layer 302, and a plurality of partition walls 303 are formed on the upper surface of the adhesive layer 302 between the electrode layers 304. It is formed to protrude. Here, the electrode layer 304 is an address electrode.

Since a metal plate having excellent heat conduction properties is used as the material of the substrate 301, there is an effect that the etching process is easy, the radiation fins 301a are easily formed, and the heat releasing effect is improved. Further, when the radiation fins 301a are formed on the substrate 301 so as to protrude, the surface area where the substrate 301 comes into contact with air is enlarged, and the heat dissipation efficiency is improved. Further, the adhesive layer 302 plays a role of bonding the substrate 301 and the partition wall 303, and at the same time, electrically isolates each discharge cell.

The PDP according to this embodiment to which the rear substrate having such a structure is applied, as shown in FIG.
A front substrate 410 for displaying characters and images and a rear substrate 400 coated with a phosphor layer that emits visible light are arranged to face each other, and the front substrate 410 and the rear substrate 4 are arranged.
A plurality of discharge cells are formed in the space between 00 and 00.

On the rear substrate 400, a substrate 401 having a plurality of radiating fins 401a formed on one surface is formed, and an insulating adhesive layer 402 is entirely formed on the other surface of the substrate 401. A plurality of electrode layers 404 are formed at predetermined intervals on the upper surface, and a plurality of partition walls 403 are formed on the upper surface of the adhesive layer 402 between the electrode layers 404.
Are respectively formed to protrude. Each electrode layer 404 is an address electrode. In addition, the adhesive layer 402, each electrode layer 404
The dielectric layer 405 is applied to the upper surface of the substrate and the side wall of each partition 403, and the phosphor layer 406 is applied to the surface of the electrical layer 405 corresponding to each cell.

On the other hand, the front substrate 410 is
Is disposed, and the rear substrate 40
A plurality of transparent electrodes 412 are formed on a surface opposing the address electrodes 404 in a direction orthogonal to each address electrode layer 404.
Is formed, and a protective film 414 is formed on the upper surface of the dielectric layer 413. It goes without saying that the front substrate can be of any conventional structure.

Hereinafter, a method of manufacturing a rear substrate of a PDP according to this embodiment will be described with reference to the drawings. First, FIG.
As shown in (A), a metal substrate 600 is prepared. Next, as shown in FIG. 4B, a heat radiating portion 601 including a metal ridge 601a and a groove 601b is formed on one surface of the metal substrate 600. Specifically, after a photoresist (not shown) having a predetermined thickness is applied to the upper surface of the metal substrate 600,
Photolithography is performed to form a photoresist pattern (not shown), and the metal substrate 600 is etched using the photoresist pattern as a mask to form a metal ridge 6.
01a and the groove 601b are formed. At this time, the metal substrate 600 is etched using a wet etching method using an HF solution.

The heat dissipating section 601 can be formed by a mechanical method. That is, when a plurality of foils attached to the rotating shaft so as to be able to rotate together with the rotating shaft are rotated, and the metal substrate 600 is put in the meantime, the portions of the metal plate 600 that have passed through the locations of the foils are worn to form grooves. Then, a metal ridge is formed in a portion through which the foil does not pass.

Next, as shown in FIG. 4C, an adhesive layer 602 is attached to the other surface of the metal substrate 600 where the metal ridges 601a are not formed, and a screen printing method is applied to the upper surface of the adhesive layer 602. A plurality of address electrodes as the electrode layer 603 are formed by utilizing the above. Next, as shown in FIG. 4D, a green tape 604 is formed on the adhesive layer 602 and the upper surface of each electrode layer 603.

Next, as shown in FIG.
After placing the mold 605 on the entire surface of the structure of FIG. 5D and pressing the mold 605 while applying pressure, FIG.
As shown in (C), each electrode layer 603 and the electrode layer 603
A partition wall 604a is formed on the upper surface of the adhesive layer 602 therebetween.
Next, as shown in FIG. 5D, after removing the mold 605, the upper surface of each electrode layer 603 and each partition 604a are removed.
A dielectric layer 606 is formed on a side wall of the PDP, a phosphor layer 607 is formed on an upper surface of the dielectric layer 606, and a rear substrate 60 of the PDP is formed.
0 is completed.

[0034]

As described above, the PD according to the present invention is
The rear substrate of P and the structure of the PDP using the same use a metal substrate having excellent heat conduction characteristics and form a metal protrusion on one surface of the metal substrate to increase the surface area. Therefore, there is an effect that the heat release effect can be improved. Also, the rear substrate of the PDP according to the present invention and the structure of the PDP using the same do not use a fan or the like.
This has the effect of reducing power consumption and noise and reducing the volume and weight of the PDP.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a rear substrate of a PDP according to an embodiment.

FIG. 2 is a sectional view showing a rear substrate of the PDP according to the embodiment.

FIG. 3 is a sectional view showing a PDP according to the present embodiment.

FIG. 4 is a process cross-sectional view illustrating a method of manufacturing the rear substrate of the PDP according to the embodiment.

FIG. 5 is a process cross-sectional view illustrating a method of manufacturing the rear substrate of the PDP according to the embodiment.

FIG. 6 is a partial perspective view showing a conventional PDP.

FIG. 7 is a cross-sectional view showing a heat dissipation structure of a conventional PDP.

[Explanation of symbols]

400: rear substrate, 401: substrate, 401a: radiation fin, 402: adhesive layer, 403: partition, 404: electrode layer,
405: dielectric layer, 406: phosphor layer, 410: front substrate, 411: substrate, 412: transparent electrode, 413: dielectric layer, 414: protective film.

 ──────────────────────────────────────────────────の Continued on the front page (72) The inventor The Sok Kim The Republic of Korea

Claims (11)

[Claims] 1. A plasma display panel comprising: a front substrate for displaying characters and images; a rear substrate disposed to face the front substrate; and a plurality of discharge cells formed between the front substrate and the rear substrate. (PDP) A rear substrate of a plasma display panel (PDP), wherein the rear substrate is formed of a metal plate, and a plurality of metal ridges are formed on one surface thereof. 2. The rear substrate of claim 1, wherein the metal plate and the metal ridge are integrally formed. 3. An adhesive layer formed on the other surface of the metal plate, a plurality of electrode layers formed in a row on the upper surface of the adhesive layer at predetermined intervals, and a bonding between the electrode layers. The rear substrate of claim 1, further comprising a plurality of barrier ribs protruding from an upper surface of the layer. 4. A rear substrate having a metal plate, and a plurality of metal ridges formed on one surface of the metal plate; an adhesive layer formed on the other surface of the rear substrate; A plurality of electrode layers formed in a row at predetermined intervals on an upper surface; partition walls protruding from an upper surface of the adhesive layer between the electrode layers; an upper surface of the adhesive layer, the upper surfaces of the electrode layers, and A dielectric layer formed on the side wall surface of the partition; a phosphor layer formed on the surface of the dielectric layer; and a front substrate disposed in parallel with the rear substrate. Plasma display panel (PDP). 5. A plasma display comprising: a front substrate for displaying characters and images; a rear substrate disposed to face the substrate; and a plurality of discharge cells formed between the front substrate and the rear substrate. A method of manufacturing a rear substrate of a panel (PDP) includes a step of preparing a metal plate and a step of processing one surface of the metal plate to form a heat radiating portion including a metal ridge and a groove. A method for manufacturing a rear substrate of a plasma display panel (PDP). 6. The step of forming the heat radiating portion includes: forming a photoresist pattern on one surface of the metal plate; and etching a portion of the metal plate exposed without being covered by the photoresist pattern. 6. The method for manufacturing a rear substrate of a plasma display panel (PDP) according to claim 5, comprising the steps of: 7. The step of etching the metal plate may include:
7. The plasma display panel (PDP) according to claim 6, wherein wet etching is performed using an F solution.
Manufacturing method of rear substrate. 8. The step of forming the heat radiating portion includes rotating a plurality of foils attached to a rotating shaft to bring a metal plate into contact with the foil, and rotating the foils to partially wear the metal substrate. The method according to claim 5, wherein the rear substrate is a plasma display panel (PDP). 9. A step of attaching an adhesive layer to the other surface of the metal plate, a step of forming a plurality of parallel row-shaped electrode layers at predetermined intervals on an upper surface of the adhesive layer, 6. The method of claim 5, further comprising: forming a plurality of barrier ribs on the upper surface of the adhesive layer. 10. The method according to claim 9, wherein the electrode layer is formed by a screen printing method. 11. The step of forming the partition wall includes: forming a green tape on the upper surface of the adhesive layer and the electrode layer; placing a mold having a plurality of grooves on the upper surface of the green tape; 10. A plasma display panel (PD) according to claim 9, comprising: a step of applying a pressure to the mold to fill a green tape into a groove of the mold; and a step of removing the mold.
P) A method for manufacturing a rear substrate.