Electromagnetic-wave shielding and light transmitting plate

• US 6,090,473 A
• Filed: 06/18/1998
• Issued: 07/18/2000
• Est. Priority Date: 06/24/1997
• Status: Expired due to Term

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Saito, Shinji, Yoshikawa, Masato, Morimura, Yasuhiro
• Primary Examiner(s): Speer, Timothy
• Assistant Examiner(s): YOUNG, BRYANT L
• Application Number:
  US09/099,343
• Time in Patent Office: 761 Days
• Field of Search: 428/209, 428/210, 428/203, 428/204, 428/208, 428/403, 428/407, 428/522, 359/359, 359/360, 359/580, 359/585, 442/6, 442/8, 442/16, 442/18, 442/19
• US Class Current: 428/209
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: H01J 2211/446 Electromagnetic shielding means; Antistatic means
• CPC Class Codes: H01J 2217/49264 Vessels
• CPC Class Codes: H01J 2229/8633 Meshes and patterns
• CPC Class Codes: H01J 29/868 Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
• CPC Class Codes: H05K 9/0096 for television displays, e.g. plasma display panel
• CPC Class Codes: Y10T 428/24868 Translucent outer layer
• CPC Class Codes: Y10T 428/24876 Intermediate layer contains particulate material [e.g., pigment, etc.]
• CPC Class Codes: Y10T 428/24917 including metal layer
• CPC Class Codes: Y10T 428/24926 including ceramic, glass, porcelain or quartz layer
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 442/109 Metal or metal-coated fiber-containing scrim
• CPC Class Codes: Y10T 442/112 Particulate free metal or alloy constituent
• CPC Class Codes: Y10T 442/126 Including a preformed film, foil, or sheet
• CPC Class Codes: Y10T 442/129 Including a ceramic or glass layer
• CPC Class Codes: Y10T 442/131 Including a coating or impregnation of synthetic polymeric material

Abstract

An electromagnetic-wave shielding and light transmitting plate suitable for an electromagnetic-wave shielding filter for a PDP, which has good electromagnetic-wave shielding efficiency and light transparency, can provide distinct pictures, and can yet be easily made, is provided. The electromagnetic-wave shielding and light transmitting plate is formed of two transparent base plates and an adhesive layer made of EVA in which conductive particles are dispersed and mixed. The base plates are integrally bonded together by the adhesive layer. Adjusting the particle size and the dispersed amount of the conductive particles enables the manufacture of plates having desired electromagnetic-wave shielding efficiency, in addition, good light transparency, without moire phenomenon. Using an adhesive sheet formed by mixing the conductive particles into the EVA facilitates the manufacture of the aforementioned plate.

Claims

1. An electromagnetic-wave shielding and light transmitting plate, comprising two transparent base plates and an adhesive layer made of resin in which conductive particles are dispersed, said base plates being integrally bonded by said adhesive layer, said conductive particles being plastic particles which are surfaced with a coating layer of carbon, metal, or alloy.

2. An electromagnetic-wave shielding and light transmitting plate including a transparent base plate having a conductive layer which is bonded to a surface of the transparent base plate by resin, wherein said conductive layer is a conductive foil which is pattern etched.

3. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 2, wherein said conductive layer is interposed between two transparent base plates.

4. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 2, wherein said conductive layer is disposed on one of the surfaces of one transparent base plate.

5. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 2, wherein said foil is a metallic foil which is formed in a predetermined pattern by steps of coating with photoresist, pattern exposure, and etching.

6. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 2, wherein said resin is ethylene-vinyl-acetate copolymer.

7. An electromagnetic-wave shielding and light transmitting plate including a transparent base plate having a conductive layer which is formed on a surface of the transparent base plate, wherein said conductive layer is a conductive film which is pattern etched.

8. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 7, wherein said transparent base plate comprises two base plates integrally bonded by adhesive resin together, and said conductive layer is formed on at least one of the base plates.

9. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 7, wherein said conductive film is a metallic film which is formed in a predetermined pattern by steps of coating with photoresist, pattern exposure, and etching.

10. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 8, wherein said adhesive resin is ethylene-vinyl acetate copolymer.

11. An electromagnetic-wave shielding and light transmitting plate including a transparent base plate having a conductive layer which is formed on a surface of the transparent base plate, wherein the conductive layer is a conductive ink provided on the surface of the transparent base plate by pattern printing.

12. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 11, wherein said transparent base plate comprises two base plates integrally bonded by adhesive resin together, and said conductive layer is formed on at least one of the surfaces of the base plates.

13. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 12, wherein said adhesive resin is ethylene-vinyl acetate copolymer.

14. An electromagnetic-wave shielding and light transmitting plate comprising two transparent base plates and a conductive mesh member interposed therebetween, which are integrally bonded by adhesive resin together, wherein

the conductive mesh member is a mesh made of metallic fibers in which the wire diameter is between 1 and 200 μ

m and an open area ratio is between 30 and 99.9%.

18. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 14, wherein the adhesive resin is ethylene-vinyl acetate copolymer.

15. An electromagnetic-wave shielding and light transmitting plate comprising two transparent base plates and a conductive mesh member interposed therebetween, which are integrally bonded by adhesive resin together, wherein

the conductive mesh member is a mesh made of metal-coated organic fibers in which the wire diameter is between 1 and 200 μ

m and an open area ratio is between 30 and 99.9%.

16. An electromagnetic-wave shielding and light transmitting plate comprising two transparent base plates and a conductive mesh member interposed therebetween, which are integrally bonded by adhesive resin together, wherein

the conductive mesh member is a composite mesh in which metallic fibers and/or metal-coated organic fibers and organic fibers are woven.

17. An electromagnetic-wave shielding and light transmitting plate as claimed in claim 16, wherein the conductive mesh member has a wire diameter from 1 and 200 μ

m and an open area ratio from 30 to 99.9%.

19. An electromagnetic-wave shielding and light transmitting plate comprising two transparent base plates and a conductive mesh member, interposed therebetween, which are integrally bonded by adhesive resin, wherein

the transparent base plate located at a side opposite to an electromagnetic wave source is formed with an antireflection film, which is a laminated film of a high-refractive transparent film and a low-refractive transparent film, on a surface thereof, and

the antireflection film is formed with an antifouling film thereon.