JP5215104B2 - Electromagnetic wave shielding material and plasma display panel with the same - Google Patents

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. 5 is a conceptual diagram of a conventional plasma display panel. 6 is a cross-sectional view taken along line VI-VI in FIG. 5 (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.

  5 and 6, the filter 3 is pressed and fixed to the front surface of the plasma display panel 1 so that the conductive gasket 9 and the 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. 5, 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 surrounded by a first conductor layer on one surface, and an infrared (NIR) cut layer and a reflection on the other surface. The transparent base material layer in which the prevention layer was formed, and the glass substrate in which the 2nd conductor layer was cyclically provided along the periphery on the one surface. The first conductor layer provided on one surface of the transparent substrate layer and the second conductor layer provided on one surface of the glass substrate are electrically connected, and The transparent base material layer and the glass substrate are overlapped so that the electromagnetic shielding mesh layer provided on the one surface of the transparent base material layer and the one surface of the glass substrate are in contact with each other. The electromagnetic shielding mesh layer provided on the one surface of the transparent base material layer and the one surface of the glass substrate are bonded to each other by a pressure-sensitive adhesive layer on the contact surface. In a laminated state above the glass substrate on the transparent substrate layer, in a projection view with respect to the upper Symbol glass substrate viewed from the side of the transparent substrate layer in a direction perpendicular, the second conductor layer, the The first conductor layer extends outward from the outer periphery . The first conductive layer and the electromagnetic wave shielding mesh layer are integrated, and the conductive powder is screen-printed in a grid pattern on the ink receiving layer provided on the one surface of the transparent base material layer. And a conductive paste ink composed of a binder.

  In the state where the glass substrate is superimposed on the transparent base material layer, the second conductor layer protrudes outward in the projection in the direction perpendicular to the glass substrate. Lines can be easily connected.

  In the projection in a direction perpendicular to the glass substrate, the pressure-sensitive adhesive layer has a gap between the inner edge of the second conductor layer and a gap in a region surrounded by the annular second conductor layer. It is provided apart. By comprising in this way, since the said adhesive layer and the 2nd conductor layer do not overlap at the time of bonding, the bonding defect can be eliminated.

  The second conductor layer is preferably formed of a conductive tape, conductive printing, dispenser coat, or conductive adhesive.

  The thickness of the second conductor layer is preferably greater than the thickness of the pressure-sensitive adhesive layer. By comprising in this way, the adhesiveness of a 1st conductor layer and a 2nd conductor layer can be improved.

  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 was formed before being bonded to the glass can be wound into a roll shape by adjusting the film thickness.

  Both the glass substrate and the transparent base material layer 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 shielding material, and a ground wire is connected to the surface of the second conductor layer protruding outward.

  When the electromagnetic wave shielding material according to the present invention is used, it is only necessary to attach to the front surface of the panel and connect the ground wire to the portion that protrudes outward from the second conductor layer. Drastically reduce the incidence of defective products.

  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 sectional view showing the manufacturing process, and FIG. 3 is a three-dimensional view. FIG. 4 is a plan view of the electromagnetic wave shielding mesh layer surrounded by the first conductor layer.

  Referring to FIG. 2, an electromagnetic wave shielding mesh layer 12 surrounded by a first conductor layer 12a is provided on one surface of a polyester film 11 which is a transparent substrate layer, and on the other surface. In addition, an infrared (NIR) cut layer 13 and an antireflection layer 14 are formed. The first conductor layer 12 a and the electromagnetic wave shielding mesh layer 12 are integrated, and are 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 provided with the first conductor layer 12a around the conductive paste ink.

  On one surface of the glass substrate 15, the second conductor layer 16 is annularly provided along the periphery.

  2 and 3, the first conductor layer 12a provided on one surface of the polyester film 11 and the second conductor layer 16 provided on one surface of the glass substrate 15 are electrically connected. The polyester film 11 and the glass substrate 15 are overlapped so that the electromagnetic wave shielding mesh layer 12 provided on one surface of the polyester film 11 and one surface of the glass substrate 15 are in contact with each other. The pressure-sensitive adhesive layer 17 is provided on the electromagnetic wave shielding mesh layer 12, and its thickness portion t1 protrudes. On the other hand, a concave portion is formed on one surface of the glass substrate 15 only by the thickness portion t2 of the second conductor layer 16 provided in an annular shape. The protruding portion of the pressure-sensitive adhesive layer 17 is overlapped so as to fit into the concave portion, and the electromagnetic wave shielding mesh layer 12 provided on one surface of the polyester film 11 and one surface of the glass substrate 15 are contact surfaces, and the pressure-sensitive adhesive Adhere by layer 17.

  Referring to FIG. 1, in a state in which glass substrate 15 is superimposed on polyester film 11, second conductor layer 16 protrudes outward in a projection in a direction perpendicular to the glass substrate. To do. When the obtained electromagnetic wave shielding material is mounted so that the glass substrate 15 side is in contact with the front surface of the plasma display panel, and a ground wire is connected to the portion of the second conductor layer 16 protruding outward, the plasma display The panel is completed.

  With reference to FIG. 2, in the projection in the direction perpendicular to the glass substrate 15, the pressure-sensitive adhesive layer 17 is located in a region surrounded by the annular second conductor layer 16. Is provided with a gap d therebetween. The gap d is about 1 mm. By comprising in this way, since the adhesive layer 17 and the 2nd conductor layer 16 do not overlap at the time of bonding, a bonding defect can be eliminated.

  The second conductor layer 16 is formed of a conductive tape, conductive printing, dispenser coat, or conductive adhesive.

  The thickness t2 of the second conductor layer 16 is preferably larger than the thickness t1 of the pressure-sensitive adhesive layer 17. By comprising in this way, with reference to FIG. 1, the adhesiveness of the 1st conductor layer 12a and the 2nd conductor layer 16 can be improved.

  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.

In order to match the shape of a general-purpose display panel, both the glass substrate 15 and the polyester film 11 are rectangular.
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 sectional drawing which shows the manufacturing process of the electromagnetic wave shielding material which concerns on this invention. It is the figure which showed the manufacturing process of the electromagnetic wave shielding material which concerns on this invention in three dimensions. It is a top view of a conductive mesh. 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.

Explanation of symbols

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 Adhesion layer 9 Conductive gasket 10 Magnetic wave shielding material 11 Polyester film DESCRIPTION OF SYMBOLS 12 Electromagnetic wave shield mesh layer 12a 1st conductor layer 13 Infrared cut layer 14 Antireflection layer 15 Glass substrate 16 2nd conductor layer 17 Adhesive layer d Crevice

Claims (6)

On one surface thereof, an electromagnetic shielding mesh layer surrounded by a first conductor 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;
A glass substrate provided with a second conductor layer in an annular shape along the periphery on one surface thereof;
The first conductor layer provided on one surface of the transparent substrate layer and the second conductor layer provided on one surface of the glass substrate are electrically connected, and The transparent base material layer and the glass substrate are stacked so that the electromagnetic shielding mesh layer provided on the one surface of the transparent base material layer and the one surface of the glass substrate are in contact with each other.
The electromagnetic shielding mesh layer provided on the one surface of the transparent base material layer and the one surface of the glass substrate are bonded by a pressure-sensitive adhesive layer on the contact surface,
In the projection view of the transparent base material layer as viewed from the side of the transparent base material layer with respect to the glass substrate in a state where the glass substrate is overlapped , the second conductor layer is the first conductive layer. In the electromagnetic wave shielding material extending in the direction to go out from the outer periphery of the conductor layer of 1 ,
The first conductive layer and the electromagnetic wave shielding mesh layer are integrated, and the conductive powder is screen-printed in a grid pattern on the ink receiving layer provided on the one surface of the transparent base material layer. An electromagnetic shielding material obtained by firing a conductive paste ink comprising a binder and a binder.   In the projection in the direction perpendicular to the glass substrate, the pressure-sensitive adhesive layer has a gap between the inner edge of the second conductor layer in the region surrounded by the annular second conductor layer. The electromagnetic wave shielding material according to claim 1, which is provided separately.   The electromagnetic shielding material according to claim 1, wherein the conductive paste ink includes a silver paste ink.   The electromagnetic wave shielding material according to any one of claims 1 to 3, wherein a thickness of the second conductor layer is larger than a thickness of the pressure-sensitive adhesive layer. The electromagnetic wave shielding material according to any one of claims 1 to 4, wherein the transparent base material layer is formed of polyethylene terephthalate, and the thickness thereof is adjusted so as to be wound in a roll shape . It is equipped with the electromagnetic shielding material according to any one of claims 1 to 5,
A plasma display panel, wherein a ground wire is connected to the surface of the second conductor layer protruding outward.