JP2011210825A - Electromagnetic wave shielding material, and plasma display panel mounted with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shielding material sufficient to be affixed to a front surface of a panel and to connect an earth cable with an outward protruding part of a conductor layer.SOLUTION: A polyester film 11 is superposed on a glass substrate 15 via an adhesive layer 17 to electrically connect an electromagnetic wave shielding mesh layer 12 disposed on one surface of the polyester film 11 with the conductor layer 16 annularly disposed on one surface of the glass substrate 15 and to bring the electromagnetic wave shielding mesh layer 12 disposed on one surface of the polyester film 11 into contact with one surface of the glass substrate 15. It is configured that the conductor layer 16 protrudes outward in projection in a direction vertical to the glass substrate 15, with the polyester film 11 superposed on the glass substrate 15.

Description

  The present invention generally relates to an electromagnetic shielding material, and more particularly to an electromagnetic shielding material improved so that grounding can be performed efficiently. The present invention also relates to a plasma display panel provided with such an electromagnetic wave shielding material.

  FIG. 3 is a conceptual diagram of a conventional plasma display panel. 4 is a cross-sectional view taken along line VI-VI in FIG. 3 (see, for example, Patent Document 1). With reference to these drawings, a filter 3 is disposed on the front side of the display unit 2 of the plasma display panel 1.

  The filter 3 includes a glass base layer 4, an antireflection film 5, a mesh film 6 and a protective film 7. The antireflection film 5 is formed by coating a PET film with an antireflection film 5a. The mesh film 6 is formed by forming a conductive mesh 6a on a PET film. The protective film 7 is formed of a PET film. The glass base material layer 4, the antireflection film 5, the mesh film 6, and the protective film 7 are bonded together with adhesive layers 8a, 8b, and 8c, respectively. The conductive mesh 6a is formed in a lattice shape by screen printing using, for example, a silver paste. The connection pads 6b formed integrally with the grid and connected to the conductive gasket 9 are also formed simultaneously with the conductive mesh 6a by screen printing.

  3 and 4, filter 3 is peeled off protective film 7 and pressed against the front surface of plasma display panel 1 so that conductive gasket 9 and connection pad 6b are in contact with each other.

The harmful electromagnetic wave emitted from the plasma display panel 1 is captured by the conductive mesh 6a, and escapes to the ground through the connection pad 6b, the conductive gasket 9, and the ground.
JP 2004-95829 A

  In the conventional method, as described above, the mesh film 6 and the protective film 7 are bonded to each other with an adhesive tape, and then bonded to the glass substrate layer, and then attached to the panel body. In recent years, large displays exceeding 50-inch size have been put on the market one after another, but sticking of adhesive tape with such a large size is an extremely difficult process, and sticking defects often occur. Furthermore, in the plasma display device shown in FIG. 4, since there are three adhesive layers, the occurrence of poor bonding has been a serious problem in manufacturing.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an electromagnetic wave shielding material that can be easily manufactured and can drastically reduce the incidence of defective products.

  Another object of the present invention is to provide a plasma display panel on which such an electromagnetic wave shielding material is mounted.

  The electromagnetic wave shielding material according to the present invention is provided with an electromagnetic wave shielding mesh layer on one surface thereof, a transparent base material layer having an infrared cut layer and an antireflection layer formed on the other surface, and one of the transparent base material layers. A transparent substrate in which a conductor layer is provided in a ring shape with a pressure-sensitive adhesive layer on the surface along the periphery, and the electromagnetic wave shielding mesh layer provided on one surface of the transparent base material layer; The electromagnetic wave shielding mesh layer provided on the one surface of the transparent base material layer and the transparent substrate are stacked so as to be electrically connected to the conductor layer provided on one surface of the transparent substrate. The one surface is bonded to the contact surface by a pressure-sensitive adhesive layer.

  In the state where the transparent substrate is superimposed on the transparent base material layer, the conductor layer protrudes outward in the projection in a direction perpendicular to the transparent substrate. Can be connected to.

  The conductor layer is formed of a metal foil such as aluminum or copper having an adhesive layer on one side. The metal foil is half cut in a ring shape, and after the metal foil is bonded to the transparent substrate via the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer is exposed at the center by peeling the inner metal foil.

  The transparent substrate layer is preferably formed of polyethylene terephthalate. It is because the transparent base material layer in the state in which the electromagnetic wave shielding mesh layer is formed before being bonded to the transparent substrate can be wound up in a roll shape by adjusting the film thickness.

  The transparent substrate is made of polyethylene terephthalate, glass or the like. In particular, glass is excellent in terms of transparency and strength.

  Both the transparent base material layer and the transparent substrate are rectangular. It matches the shape of a general-purpose display panel.

  A plasma display panel according to another aspect of the present invention is provided with the electromagnetic wave shielding material, and a ground wire is connected to the surface of the conductor layer protruding outward.

  When the electromagnetic wave shielding material according to the present invention is used, it is only necessary to bond to the front surface of the panel and connect the ground wire to the portion protruding outward from the conductor layer. The incidence is drastically reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view of an electromagnetic wave shielding material 10 according to an embodiment of the present invention. FIG. 2 is a plan view showing the manufacturing process.

  With reference to FIG. 1 or FIG. 2, the electromagnetic wave shielding mesh layer 12 is provided on one surface of the polyester film 11 which is a transparent base material layer, and the infrared cut layer 13 and the antireflection layer 14 are provided on the other surface. Is formed. The electromagnetic shielding mesh layer 12 is formed on the ink receiving layer (not shown) on the polyester film 11 by screen printing with a conductive paste ink. The conductive paste ink is composed of conductive powder and a binder. For example, it is formed in a lattice shape by screen printing using a silver paste. The conductive paste ink is baked to form the electromagnetic wave shielding mesh layer 12.

  On one surface of the glass substrate 15, the conductor layer 16 is provided in an annular shape along the periphery with the adhesive layer 17 interposed therebetween.

  With reference to FIG. 1 and FIG. 2, the electromagnetic wave shielding mesh layer 12 provided on one surface of the polyester film 11 and the conductor layer 16 provided on one surface of the glass substrate 15 are electrically connected. And the polyester film 11 and the glass substrate 15 are adhere | attached with the adhesive layer 17 so that the electromagnetic wave shielding mesh layer 12 provided in the one surface of the polyester film 11 and the one surface of the glass substrate 15 may contact.

  With reference to FIG. 1, in the state which laminated | stacked the glass substrate 15 on the polyester film 11, in the projection to a perpendicular direction with respect to this glass substrate, it comprises so that the conductor layer 16 may protrude outward. When the obtained electromagnetic shielding material is mounted so that the glass substrate 15 side is in contact with the front surface of the plasma display panel, and the ground wire is connected to the portion of the conductor layer 16 protruding outward, the plasma display panel is completed. To do.

  The conductor layer 16 is formed of a metal foil such as aluminum or copper having a pressure-sensitive adhesive layer on one side which is half-cut into a ring shape.

  The thickness t2 of the conductor layer 16 is preferably about 10 μm to 100 μm. If it is thinner than 10 μm, the metal foil may be peeled off when grounding, and if it exceeds 100 μm, a gap due to a step may be formed between the electromagnetic wave shielding mesh layer 12 and the pressure-sensitive adhesive layer 17.

  When the transparent base material layer is formed of polyethylene terephthalate as in the examples, the transparent base material layer in a state in which the electromagnetic wave shielding mesh layer is formed before being bonded to the glass by adjusting the film thickness is rolled. Can be rolled up.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  According to the present invention, an electromagnetic wave shielding material that is easy to manufacture and improved so as to drastically reduce the incidence of defective products can be obtained.

It is sectional drawing of the electromagnetic wave shielding material which concerns on this invention. It is a schematic diagram which shows the manufacturing process of the electromagnetic wave shielding material which concerns on this invention. It is a disassembled perspective view of the functional film with which the conventional plasma display panel is mounted. It is sectional drawing which follows the VI-VI line in FIG.

DESCRIPTION OF SYMBOLS 1 Plasma display panel 2 Display part 3 Filter 4 Glass base material layer 5 Antireflection film 5a Antireflection film 6 Mesh film 6a Conductive mesh 6b Connection pad 7 Protective film 8a Adhesive layer 9 Conductive gasket 10 Electromagnetic shielding material 11 Polyester film 12 Electromagnetic wave shield mesh layer 13 Infrared cut layer 14 Antireflection layer 15 Glass substrate 16 Conductor layer 17 Adhesive layer

Claims (2)

On one surface thereof, an electromagnetic wave shielding mesh layer is provided, and on the other surface, a transparent base material layer in which an infrared cut layer and an antireflection layer are formed, and
On one surface thereof, along the periphery, a conductor layer is provided with a transparent substrate provided in an annular shape via an adhesive layer, and
The electromagnetic shielding mesh layer provided on one surface of the transparent base material layer and the conductor layer provided on one surface of the transparent substrate are overlapped so as to be electrically connected,
The electromagnetic shielding mesh layer provided on the one surface of the transparent base material layer and the one surface of the transparent substrate are bonded by a pressure-sensitive adhesive layer on the contact surface,
An electromagnetic wave shielding material in which the conductive layer protrudes outward in a projection in a direction perpendicular to the transparent substrate in a state where the transparent substrate is superimposed on the transparent base material layer. It is equipped with the electromagnetic shielding material according to claim 1,
A plasma display panel in which a ground wire is connected to a surface of the conductor layer protruding outward.

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