JP2007323856A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display panel which can reduce a product price of a display device, and moreover, can make the device smaller and lighter. <P>SOLUTION: The plasma display panel 13 is provided with a discharge space 18 which is formed between a front substrate 13A and a rear substrate 13F facing each other and is divided for discharge cells by barrier ribs arranged between the pair of the substrates. The front substrate 13A is made of a glass plate integrally formed with an electromagnetic wave shielding layer and dispenses with installation of a front filter, an independent part from the plasma display panel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plasma display panel, and more particularly, to an improvement for realizing weight reduction and manufacturing cost reduction.

FIG. 1 is a side sectional view showing a conventional display device equipped with a plasma display panel.
The display device shown in FIG. 1 is described in Patent Document 1 below, and a plasma display panel 3 is fixed to a front side of a chassis 2 attached to the front side of a rear case 1 by an adhesive sheet 4.

An inner flange portion 5A is formed at the front end portion of the frame 5 attached to the peripheral edge portion of the front surface side of the chassis 2 so as to surround the plasma display panel 3, and the gasket 6 is sandwiched between the front surface side of the inner flange portion 5A. A front filter (panel protection plate) 7 is attached and fixed by a metal fitting 8.
Reference numeral 9 denotes a front case of the display device. FIG. 2 is a side view schematically showing the configuration of the front filter (panel protection plate) 7 of the display device.

  In FIG. 2, a front filter (panel protection plate) 7 includes an electromagnetic wave blocking layer (conductive mesh) 7B formed on a glass substrate 7A, an antireflection layer 7C formed on the electromagnetic wave blocking layer 7B, and glass The infrared ray absorption / color tone correction layer 7D is formed on the back side of the substrate 7A.

  That is, in a plasma display panel, electromagnetic waves are generated by discharge in the discharge space. In order to prevent the generated electromagnetic waves from leaking from the plasma display panel to the display surface side of the display device, A front filter (panel protection plate) 7 having an electromagnetic wave shielding layer (conductive mesh) 7B is provided on the front side of the plasma display panel.

Japanese Patent Laid-Open No. 2005-19120

However, the front filter 7 provided for preventing leakage of electromagnetic waves to the display surface side of the display device has a high manufacturing cost per se, and further increases the number of component parts and the number of assembly processes in the display device. Therefore, there has been a problem that the product price of the display device is increased.
Further, in the display device provided with the conventional plasma display panel, by providing the front filter (panel protection plate) 7, the thickness dimension of the device is increased, and there is a problem that the device is increased in size and weight.

  As problems to be solved by the present invention, there are examples of problems such as an increase in the product price of the display device and an increase in the size and weight of the device, which occur in the above-described conventional technology.

  In order to solve the above-described problem, in the plasma display panel according to claim 1, a discharge space formed between the front substrate and the back substrate facing each other is formed by a partition wall disposed between the pair of substrates. In the plasma display panel partitioned for each discharge cell, the front substrate is formed of a glass plate integrated with an electromagnetic wave shielding layer.

Hereinafter, preferred embodiments of the plasma display panel according to the present invention will be described.
In the plasma display panel according to the embodiment of the present invention, a discharge space formed between a front substrate and a back substrate facing each other is partitioned for each discharge cell by a partition wall disposed between the pair of substrates. In the plasma display panel that
The front substrate is formed of a glass plate integrated with an electromagnetic wave shielding layer.

In the plasma display panel of the present invention, the electromagnetic wave shielding layer integrated with the front substrate prevents electromagnetic waves generated by the discharge in the discharge space of the plasma display panel from leaking to the display surface side.
Therefore, in the display device using the plasma display panel of the present invention, it is not necessary to equip the front surface of the plasma display panel with a front filter having an electromagnetic wave blocking layer in order to prevent electromagnetic waves from leaking to the display surface side. .
In other words, in the display device using the plasma display panel of the present invention, it is possible to simplify the configuration of the display device by omitting the high-cost front filter, thereby reducing the number of parts and manufacturing man-hours. The product price of the display device can be reduced, and the device can be made thinner and lighter.

Preferably, in the above embodiment, the electromagnetic wave shielding layer is formed of a conductive mesh incorporated in a glass plate.
In this way, for example, when a molten glass base material is formed into a plate shape, it is easy to manufacture a glass plate integrated with an electromagnetic wave shielding layer by inserting a conductive mesh into the molten glass base material. Can be.
Further, by appropriately setting the roughness of the conductive mesh, the diameter of the wire to be used, and the like, it is possible to obtain good electromagnetic wave shielding performance such as obtaining an attenuation effect of 20 dB or more at 100 MHz.
Furthermore, by incorporating an electromagnetic wave blocking layer in the glass plate itself that is the front substrate, it is possible to prevent the reflection of external light that occurred when a front filter was equipped on the front of the plasma display panel, A high-quality image display without external light reflection can be realized.
In addition, the conductive mesh built into the glass plate as an electromagnetic wave shielding layer reinforces the glass plate, so that the necessary strength can be secured as a plasma display panel without a front filter on the front side of the front substrate. Can do.

More preferably, in the above embodiment, the electromagnetic wave shielding layer may be a mesh made of a transparent metal formed on a thin film glass.
With such a configuration, for example, ITO, which is a highly transparent material, is used as the transparent metal, and a conductive mesh is easily obtained by forming a mesh pattern of transparent metal on the thin film glass by sputtering. be able to.
And since this electroconductive mesh is excellent in translucency, the light emission of a plasma display panel is not light-shielded by an electroconductive mesh, and it can implement | achieve the highly accurate image display excellent in color reproducibility etc. it can.

More preferably, the front substrate is formed by a float method.
With such a configuration, for example, a conductive mesh formed of a transparent metal by inserting a thin film glass with a mesh pattern sputtered into the glass melt during a float process in which the glass melt is passed over the molten metal. Can be manufactured with high accuracy and with ease.
In addition, by adopting the float method, the front substrate can be formed to an arbitrary thickness in the range of 0.5 to 5 mm with high accuracy flatness, and high-precision plasma display panel manufacturing can be realized. .

More preferably, the front substrate is a glass plate having a thickness of about 0.5 mm to 5 mm.
With such a configuration, the device can be slimmed down compared to the structure of a conventional display device in which a front filter having an electromagnetic wave blocking layer is provided on the front side of the front substrate, and the display device can be made thinner. , Compactness and weight reduction can be realized.

More preferably, an infrared absorption / color tone correction layer is formed on the display side surface of the front substrate.
With such a configuration, it is possible to prevent the coloration of the plasma display panel from being disturbed by the influence of infrared rays or the like, and it is possible to realize a high-quality image display excellent in color reproducibility and the like.

More preferably, an antireflection layer is formed on the infrared absorption / color tone correction layer formed on the front substrate.
With such a configuration, the color development of the plasma display panel is not reflected on the surface of the front substrate and the quality of the display image is not deteriorated, and a higher-definition and high-quality image display can be realized.

More preferably, the electromagnetic wave shielding layer is configured to be connected to a ground terminal.
With such a configuration, the electromagnetic wave shielding layer is not charged and the occurrence of inconvenience due to the charging of the front substrate can be prevented.

  Furthermore, specific examples of the above embodiment are shown below.

3A and 3B are explanatory views of the first embodiment of the plasma display panel according to the present invention. FIG. 3A is a perspective view and FIG. 3B is a side sectional view.
In the plasma display panel 13 according to the first embodiment, a discharge space 18 defined between a rear substrate 13F and a front substrate 13A that are opposed to each other in parallel is disposed between the pair of substrates 13F and 13A. Each discharge cell is partitioned by a partition wall (not shown). Further, the outer periphery of the discharge space 18 is sealed with a frit 16 as a sealing material.

The front substrate 13A constituting the plasma display panel 13 is formed of a glass plate integrated with a conductive mesh 13B as an electromagnetic wave shielding layer.
In the case of Example 1, the conductive mesh 13B as the electromagnetic wave shielding layer is integrated with the front substrate 13A in a form incorporated in a glass plate.
More specifically, the conductive mesh 13B is formed by drawing a mesh pattern made of a transparent metal by sputtering on a thin film glass. As the transparent metal to be sputtered, for example, ITO, which is a highly transparent conductive material, may be employed.

  In addition, the glass plate to be the front substrate 13A is formed to a predetermined thickness by the float process, and the conductive thin film 13B having the conductive mesh 13B is inserted during the float process, thereby inserting the conductive mesh 13B. The front substrate 13A, which is a glass plate with a built-in glass, is manufactured.

The float method is generally suitable for manufacturing a flat glass plate such as a front substrate of a plasma display panel. FIG. 4 shows a manufacturing process of the front substrate by the float method.
In manufacturing the front substrate by the float process, silica sand, soda ash, and lime are used as the raw material 104 and melted by the burner 106 in the melting apparatus 101 to obtain a glass melt 103. By pouring the glass melt 103 onto the molten metal 105, a smooth surface is generated both in the upper and lower directions.
When this glass melt 103 is poured out onto the molten metal 105 in the float apparatus 102, an electroconductive mesh 108 formed on the thin film glass by sputtering is inserted into the glass melt 103, so that an electromagnetic shield is provided. A glass plate 109 in which the conductive mesh 13B is integrated is manufactured.
The float apparatus 102 is equipped with a heater 107 that maintains the interior of the apparatus at a predetermined temperature, and maintains the molten metal 105 and the glass melt 103 at a predetermined temperature.
By cutting the glass plate 109 manufactured by the float apparatus 102 into a predetermined size, the front substrate 13A including the conductive mesh 13B is manufactured.

  Tin is used as the molten metal 105 of the float apparatus 102. Tin has a higher specific gravity than glass and does not mix with glass, so a very flat glass plate is formed on the tin. By this method, the front substrate 13A of the plasma display having a thickness of about 0.5 mm to 5 mm is formed.

FIG. 5 is a side sectional view of a display device 19 using the plasma display panel 13 of the first embodiment.
In the case of Example 1, as shown in FIG. 5, an infrared absorption / color tone correction layer 13D and an antireflection layer 13C are formed in a laminated structure on the surface of the front substrate 13A manufactured by the float process.
These infrared absorption / color tone correction layer 13D and antireflection layer 13C may be formed by surface treatment of the front substrate 13A after the rear substrate 13F is assembled to the front substrate 13A to complete the plasma display panel 13. You may make it form in the state of the front substrate 13A single-piece | unit manufactured by the float glass process.

In FIG. 5, in the display device 19, the plasma display panel 13 is fixed to the front side of the chassis 12 attached to the front side of the rear case 11 with an adhesive sheet 14.
The mechanism by which the plasma display panel 13 is fixed by a frame 15 that is attached to the front peripheral edge of the chassis 12 so as to surround the plasma display panel 13 is the same as that of the conventional display device 19 shown in FIG. is there.
In the plasma display panel 13 incorporated in the display device 19, a conductive mesh 13B built in the front substrate 13A is connected to the ground terminal of the device.

In the plasma display panel 13 of the first embodiment described above, the conductive mesh (electromagnetic wave shielding layer) 13B integrated with the front substrate 13A causes the electromagnetic waves generated by the discharge in the discharge space 18 of the plasma display panel 13 to be generated. Prevents leakage to the display side.
Therefore, in the display device 19 using the plasma display panel 13 of the present invention, a front filter having a conductive mesh (electromagnetic wave shielding layer) 13B is used as a plasma display panel in order to prevent electromagnetic waves from leaking to the display surface side. No need to equip 13 front.
In other words, in the display device 19 using the plasma display panel 13 of the present invention, the configuration of the display device 19 can be simplified by omitting the front filter, which has a high manufacturing cost, thereby reducing the number of parts and manufacturing man-hours. By the reduction, the product price of the display device 19 can be reduced, and the thickness and weight of the device can be reduced.

Further, since the electromagnetic wave shielding layer is formed by a conductive mesh incorporated in the glass plate, for example, when the molten glass base material is formed into a plate shape, the conductive mesh is contained in the molten glass base material. By inserting, a glass plate integrated with the conductive mesh 13B as the electromagnetic wave shielding layer can be easily manufactured.
In addition, by appropriately setting the roughness of the conductive mesh 13B, the diameter of the wire used, and the like, it is possible to obtain good electromagnetic wave shielding performance such as obtaining an attenuation effect of 20 dB or more at 100 MHz.

Furthermore, by incorporating an electromagnetic wave blocking layer in the glass plate itself that is the front substrate, it is possible to prevent the reflection of external light that occurred when a front filter was equipped on the front of the plasma display panel, A high-quality image display without external light reflection can be realized.
In addition, the conductive mesh 13B incorporated in the glass plate as an electromagnetic wave shielding layer reinforces the glass plate, so that the strength required for the plasma display panel 13 can be ensured without providing a front filter on the front side of the front substrate 13A. Can be realized.

In the first embodiment, the conductive mesh 13B is a mesh made of a transparent metal. For example, ITO, which is a highly transparent material, is used as the transparent metal, and a mesh pattern made of the transparent metal is formed on the thin film glass by sputtering. By forming the conductive mesh 13B, it is possible to easily obtain the conductive mesh 13B.
And since this conductive mesh 13B is excellent in translucency, light emission of the plasma display panel 13 is not shielded by the conductive mesh 13B, and a highly accurate image display excellent in color reproducibility and the like is realized. can do.

Furthermore, as shown in FIG. 4, the front substrate 13A of Example 1 is formed by a float method in which the glass melt 103 is flowed over the molten metal 105, and the mesh pattern was sputtered during the float process. By inserting the thin film glass into the glass melt 103 in the float apparatus 102, the front substrate 13A incorporating the conductive mesh 13B formed of a transparent metal can be easily manufactured with high accuracy. .
In addition, by adopting the float method, the front substrate 13A can be formed with an arbitrary flatness with a high accuracy in an arbitrary thickness in the range of 0.5 to 5 mm, and the manufacturing of the high-precision plasma display panel 13 can be realized. Can do.

  Further, as in the above embodiment, when the thickness of the front substrate 13A is regulated to about 0.5 mm to 5 mm, a conventional display in which a front filter having an electromagnetic wave blocking layer is provided on the front side of the front substrate. Compared with the structure of the device, the device can be slimmed, and the display device 19 can be made thin, compact, and light.

  Further, as in the above embodiment, when the infrared absorption / color tone correction layer 13D is formed on the display side surface of the front substrate 13A, the coloration of the plasma display panel 13 can be prevented from being disturbed by the influence of infrared rays or the like. In addition, it is possible to realize a high-quality image display excellent in color reproducibility and the like.

  Further, as in the above embodiment, when the antireflection layer 13C is formed on the infrared absorption / color tone correction layer 13D formed on the front substrate 13A, the coloration of the plasma display panel 13 is caused by the front substrate 13A. Therefore, the quality of the display image is not deteriorated due to reflection on the surface of the image, and a higher-definition and high-quality image display can be realized.

  Furthermore, when the conductive mesh 13B as the electromagnetic wave shielding layer is connected to the ground terminal as in the above embodiment, the electromagnetic wave shielding layer is not charged, and the inconvenience caused by the charging of the front substrate 13A can be prevented. Can be prevented.

  As described above in detail, in the plasma display panel 13 according to the embodiment of the present invention, the discharge space 18 formed between the front substrate 13A and the back substrate 13F facing each other has the pair of substrates 13F, 13F, In the plasma display panel 13 partitioned for each discharge cell by the barrier ribs arranged between 13A, the front substrate 13A is formed of a glass plate integrated with a conductive mesh 13B as an electromagnetic wave shielding layer. It is a feature.

As a result, in the plasma display panel 13 of the present invention, the electromagnetic wave shielding layer by the conductive mesh 13B integrated with the front substrate 13A causes the electromagnetic wave generated by the discharge in the discharge space 18 of the plasma display panel 13 to be displayed on the display surface side. To prevent leakage.
Therefore, in the display device 19 using the plasma display panel 13 of the present invention, it is necessary to equip the front surface of the plasma display panel with a front filter having an electromagnetic wave blocking layer in order to prevent electromagnetic waves from leaking to the display surface side. Disappears.
In other words, in the display device 19 using the plasma display panel 13 of the present invention, the front filter having a high manufacturing cost can be omitted, and the configuration of the display device 19 can be simplified. The product price can be reduced, and the apparatus can be reduced in size and weight.

It is a sectional side view of the display apparatus equipped with the conventional plasma display panel. It is a schematic block diagram of the front filter of the display apparatus shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of Example 1 of the plasma display panel based on this invention, (a) is a perspective view, (b) is sectional side view. It is explanatory drawing of the manufacturing method by the float method of the front substrate of the plasma display panel shown in FIG. FIG. 4 is a side sectional view of a display device using the plasma display panel shown in FIG. 3.

Explanation of symbols

11 Rear case 12 Chassis 13 Plasma display panel 13A Front substrate 13B Conductive mesh (electromagnetic wave shielding layer)
13C Antireflection layer 13D Infrared absorption / color tone correction layer 13F Rear substrate 14 Adhesive sheet 15 Frame 16 Frit 18 Discharge space 19 Display device 101 Dissolving device 102 Float device 103 Glass melt 108 Conductive mesh 109 Glass plate

Claims (8)

In a plasma display panel in which a discharge space formed between a front substrate and a back substrate facing each other is partitioned for each discharge cell by a partition wall disposed between the pair of substrates,
The plasma display panel, wherein the front substrate is formed of a glass plate integrated with an electromagnetic wave shielding layer.   The plasma display panel according to claim 1, wherein the electromagnetic wave shielding layer is formed of a conductive mesh incorporated in the glass plate.   2. The plasma display panel according to claim 1, wherein the electromagnetic wave shielding layer is a mesh made of a transparent metal formed on a thin film glass.   The plasma display panel according to claim 1, wherein the front substrate is formed by a float process.   The plasma display panel according to claim 1, wherein the front substrate is a glass plate having a thickness of 0.5 mm to 5 mm.   The plasma display panel according to claim 1, wherein an infrared absorption / color tone correction layer is formed on a display side surface of the front substrate.   7. The plasma display panel according to claim 6, wherein an antireflection layer is formed on the infrared absorption / color tone correction layer formed on the front substrate. The plasma display panel according to claim 1, wherein the electromagnetic wave shielding layer is connected to a ground terminal.

Images