Filter for displaying, display unit and production method therefor

• US 20030156080A1
• Filed: 11/13/2002
• Published: 08/21/2003
• Est. Priority Date: 02/01/2000
• Status: Active Grant

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Inventors: Yamazaki, Fumiharu, Saigo, Hiroaki, Fukuda, Shin, Koike, Katsuhiko, Okamura, Tomoyuki, Kitagawa, Toshihisa, Misawa, Tsutami, Nishimoto, Taizo
• Granted Patent: US 6,965,191 B2
• Time in Patent Office: Days
• US Class Current: 345/60
• CPC Class Codes: G02B 1/11 Anti-reflection coatings
• CPC Class Codes: G02B 1/116 including electrically conducting layers
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: H01J 2211/446 Electromagnetic shielding means; Antistatic means
• CPC Class Codes: H01J 2329/892 Anti-reflection, anti-glare, viewing angle and contrast improving means
• CPC Class Codes: H05K 9/0096 for television displays, e.g. plasma display panel

Abstract

The display filter is constituted by laminating a transparent adhesive layer (C) 31 containing dye, a polymer film (B) 20, a transparent electrically conductive layer (D) 10, a transparent adhesive layer (E) 40, and a functional transparent layer (A) 60 having an anti-reflection property, a hard coat property, a gas barrier property, an antistatic property and an anti-fouling property sequentially in this order, adhered on a display area 00; on this occasion, the transparent electrically conductive layer (D) 10 is grounded to a ground terminal of the display via an electrode 50 and an electrically conductive copper foil adhesive tape 80.

Claims

1. A display filter capable of being adhered to a display screen and having predetermined filter characteristics, comprising:

a functional transparent layer (A) disposed in an atmospheric side, having an anti-reflection property and/or an anti-glare property;

a transparent adhesive layer (C) disposed in a display side, for allowing the display filter to be adhered to the screen; and

a polymer film (B) disposed as a substrate between the functional transparent layer (A) and the transparent adhesive layer (C).

2. The display filter of claim 1, wherein a transparent electrically conductive layer (D) having a surface resistance of from 0.01 to 30 Ω

/square is disposed between the functional transparent layer (A) and the polymer film (B) and/or between the polymer film (B) and the transparent adhesive layer (C).

3. The display filter of claim 2, wherein a portion or entirety of the transparent electrically conductive layer (D) is constituted by an electrically conductive mesh.

4. The display filter of claim 2, wherein the transparent electrically conductive layer (D) is constituted by firstly laminating a repeating unit (Dt)/(Dm) comprising a high-refractive-index transparent thin film layer (Dt) and a metallic thin film layer (Dm) while repeating the repeating unit from 2 times to 4 times and, then, on the resultant laminate, further laminating a high-refractive-index thin film layer (Dt).

5. The display filter of claim 4, wherein at least one layer of a plurality of high-refractive-index transparent thin film layers (Dt) is formed by an oxide containing, as a major component, at least one metal selected from the group consisting of indium, tin and zinc.

6. The display filter of claim 4, wherein at least one layer of a plurality of metallic thin film layers (Dm) is formed of silver or an alloy comprising silver.

7. The display filter of any one of claims 1 to 6, wherein the functional transparent layer (A) further has at least one function selected from the group consisting of a hard coat property, an antistatic property, an anti-fouling property, a gas barrier property and an ultraviolet cutting-off property.

8. The display filter of any one of claims 1 to 6, wherein an adhesive layer (E) is disposed between the functional transparent layer (A) and the polymer film (B).

9. The display filter of any one of claims 1 to 6, wherein a hard coat layer (F) is formed on both surfaces or one surface of the polymer film (B).

10. The display filter of any one of claims 1 to 6, wherein at least one dye is contained in at least one layer selected from the group consisting of:

the functional transparent layer (A), the polymer film (B), the transparent adhesive layer (C) a transparent electrically conductive layer (D), the adhesive layer (E) and the hard coat layer (F).

11. The display filter of claim 10, wherein a dye having an absorption maximum in a wavelength range from 570 to 605 nm is contained.

12. The display filter of claim 11, wherein the dye is a tetraazaporphyrin compound.

13. The display filter of claim 12, wherein the tetraazaporphyrin compound is expressed by the following formula (1):

14. The display filter of claim 10, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

15. The display filter of any one of claims 1 to 6, wherein visible light ray reflectance on a surface of the functional transparent layer (A) is 2% or less.

16. The display filter of any one of claims 1 to 15, wherein visible light ray transmittance is from 30 to 85%.

17. The display filter of any one of claims 1 to 16, wherein transmittance minimum in a wavelength range of from 800 to 1100 nm is 20% or less.

18. The display filter of any one of claims 1 to 6, wherein a total thickness of the polymer film in entirety of the filter is 0.3 mm or more.

19. The display filter of any one of claims 1 to 18, wherein a polymer film for increasing a total thickness capable of containing a dye is provided.

20. The display filter of claim 2 or 3, wherein an electrode electrically connected with the transparent electrically conductive layer (D) is formed.

21. The display filter of claim 20, wherein the electrode electrically contacting with the transparent electrically conductive layer (D) is continuously formed along a circumferential direction in a peripheral portion of the filter.

22. The display filter of claim 20, wherein an electrode is formed in an electrically conducting portion a part of which is exposed.

23. The display filter of claim 21 or 22, wherein the filter is shaped into a rectangle and electrodes are formed in two surrounding sides facing to each other.

24. The display filter of claim 21 or 22, where the electrode electrically connected with the transparent electrically conductive layer (D) is formed on a surface of a peripheral edge of the filter.

25. The display filter of any one of claims 1 to 6, wherein a communicating hole which communicates from an outermost surface of the filter through to at least the transparent electrically conductive layer (D) is formed along a thickness direction of the filter wherein an electrode which electrically is connected with the transparent electrically conductive layer (D) is formed inside the communication hole.

26. The display filter of any one of claims 1 to 6, wherein an electrically conductive tape is interposed between the transparent electrically conductive layer (D) and a layer adjacent to the transparent electrically conductive layer (D).

27. A display apparatus, comprising:

a display for representing an image; and

a display filter of any one of claims 1 to 26, disposed on a display screen.

28. A method for production of a display apparatus, comprising the steps of:

laminating a display filter of any one of claims 20 to 26 on a display screen of a display apparatus via a transparent adhesive layer (C); and

electrically connecting a ground conductor of the display apparatus and the electrode of the transparent electrically conductive layer (D).

29. A method of production of a display apparatus, comprising the steps of:

laminating a laminate filter comprising a polymer film (B), a transparent electrically conductive layer (D), and a transparent adhesive layer (C) on a display screen via the transparent adhesive layer (C);

arranging a functional transparent layer (A) having an anti-reflection property and/or an anti-glare property on the laminate filter directly or via a second adhesive layer; and

electrically connecting a ground conductor of the display apparatus and the transparent electrically conductive layer (D).

30. A method for production of a display apparatus, characterized by comprising the steps of:

arranging an adhesive layer on a display screen of a display apparatus;

bonding a laminate filter comprising a polymer film (B), a transparent electrically conductive layer (D), and a functional transparent layer (A) having an anti-reflection property and/or an anti-glare property on the display screen via the adhesive layer; and

electrically connecting a ground conductor and the transparent electrically conductive layer (D).

31. A method for production of a display apparatus, comprising the steps of:

arranging an adhesive layer on a display screen;

bonding a laminate filter comprising a polymer film (B), and a transparent electrically conductive layer (D) on the display screen via the adhesive layer;

arranging a functional transparent layer (A) having an anti-reflection property and/or an anti-glare property on the laminate filter directly or via a second adhesive layer; and

electrically connecting a ground conductor and the transparent electrically conductive layer (D).