Electromagnetic shield film, electromagnetic shield unit and display

• US 6,884,936 B2
• Filed: 02/25/2002
• Issued: 04/26/2005
• Est. Priority Date: 03/02/2001
• Status: Expired due to Fees

• Current Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Original Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Inventors: Takahashi, Hiroaki, Nakamura, Hajime, Imaizumi, Junichi, Nomura, Hiroshi
• Primary Examiner(s): Reichard, Dean A.
• Assistant Examiner(s): OLIVA, CARMELO B
• Application Number:
  US10/468,143
• Publication Number:
  US 20040074655A1
• Time in Patent Office: 1,156 Days
• Field of Search: 174/35.R, 174/35.GC, 174/35.MS, 361/816, 361/818, 348/819, 428/209, 428/349, 428/457, 428/488
• US Class Current: 174/389
• CPC Class Codes: H05K 9/0096 for television displays, e.g. plasma display panel

Abstract

An electromagnetic wave shield film (1) comprises a transparent base (2), a conductor (4) positioned on the transparent base (2) via an adhesive (3) and having a mesh geometric pattern, and an earth portion (5) arranged around the conductor (4) and including conductive regions (501) which absorb electromagnetic waves, and non-conductive regions (510) which prevent the earth portion (5) from being creased.

Claims

1. An electromagnetic wave shield film comprising:

a transparent base;

a conductor mounted on said transparent base and having a geometric pattern; and

an earth portion arranged around the conductor and having conductive regions and non-conductive regions.

2. The electromagnetic wave shield film of claim 1, wherein said conductive regions occupy 30% to 99% of said earth portion.

3. The electromagnetic wave shield film of claim 1, wherein said conductive region occupies 60% to 99% of said earth portion.

4. The electromagnetic wave shield film of claim 1, wherein said conductive regions occupy 65% to 97% of said earth portion.

5. The electromagnetic wave shield film of claim 1, wherein said conductive region has at least one of geometric patterns (1) to (10):

(1) a comb-shaped pattern;

(2) a rectangular geometric pattern;

(3) a zigzag pattern;

(4) a parallelogram pattern;

(5) a ladder-shaped pattern;

(6) a mesh geometrical pattern;

(7) a triangular pattern;

(8) a pentagonal or polygonal pattern;

(9) a circular or oval pattern; and

(10) a pentacle pattern.

6. The electromagnetic wave shield film of claim 1, wherein said conductor and said conductive regions are mounted on said transparent base using an adhesive.

7. The electromagnetic wave shield film of claim 6, wherein said transparent base is a transparent plastic, said conductor and said conductive regions of said earth portion are made of metal or alloys, and said adhesive is a polymer group adhesive.

8. The electromagnetic wave shield film of claim 7, wherein said each conductive region is 3 μ

m or more thick.

9. The electromagnetic wave shield film of claim 8, wherein said each conductive region is 40 μ

m or less thick.

10. The electromagnetic wave shield film of claim 1, wherein an aperture ratio of said conductor is a 50% to 98%.

11. The electromagnetic wave shield film of claim 1, wherein the non-conductive region is a region free of conductors so as to prevent the earth portion from being creased.

12. An electromagnetic wave shield unit comprising:

an electromagnetic wave shield film which includes a transparent base, a conductor mounted on said transparent base and having a mesh geometric pattern, an earth portion provided around said conductor and having conductive regions and non-conductive regions; and

a protective film provided at least on said conductor of said electromagnetic wave shield film.

14. The electromagnetic wave shield unit of claim 12, wherein said conductive regions occupy 30% to 99% of said earth portion.

15. The electromagnetic wave shield unit of claim 12, wherein said each conductive region of said earth portion has at least one of geometric patterns (1) to (10):

(1) a comb-shaped pattern;

(2) a rectangular geometric pattern;

(3) a zigzag pattern;

(4) a parallelogram pattern;

(5) a ladder-shaped pattern;

(6) a mesh geometrical pattern;

(7) a triangular pattern;

(8) a pentagonal or polygonal pattern;

(9) a circular or oval pattern; and

(10) a pentacle pattern.

13. An electromagnetic wave shield unit comprising:

an electromagnetic shied film which includes;

an anti-reflection film;

a near infrared ray absorbing film;

a first transparent base on said near infrared ray absorbing film;

a second transparent base on said first transparent base;

a conductor on said second transparent base and having a mesh geometric pattern; and

an earth portion provided around said conductor and having conductive regions and non-conductive regions; and

a protective film provided at least on said conductor of said electromagnetic wave shield film.

16. A display comprising:

a display module; and

an electromagnetic wave shield unit which includes at least;

a transparent base on said display module, a conductor on said transparent base and having a mesh geometric pattern, an earth portion provided around said conductor and having a conductive region and a non-conductive region; and

a protective film at least on said conductor of said electromagnetic wave shield film.

18. The display of claim 16, wherein said electromagnetic wave shield unit is attached to said display module using a bracket.

19. The display of claim 16, wherein said display module is a plasma display module, a cathode ray tube display module, a liquid crystal display module or an electro luminescence display module.

17. A display comprising:

a display module;

an electromagnetic wave shield film which includes at least;

an anti-reflection film on said display module;

a near infrared ray absorbing film on said anti-reflection film;

a first transparent base on said near infrared ray absorbing film;

a second transparent base on said first transparent base, a conductor on said second transparent base and having a mesh geometric pattern, and an earth portion provided around said conductor and having conductive regions and non-conductive regions; and

a protective film on said electromagnetic wave shield film.