Display filter, display apparatus, and method for production of the same

• US 6,965,191 B2
• Filed: 02/01/2001
• Issued: 11/15/2005
• Est. Priority Date: 02/01/2000
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Williams, Joseph
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US10/182,774
• Publication Number:
  US 20030156080A1
• Time in Patent Office: 1,748 Days
• Field of Search: 313/112, 313/461, 313/477.R, 313/478, 313/479, 313/480, 359/359, 359/360, 359/585, 359/589, 428/690, 427/162, 427/64, 427/66
• US Class Current: 313/112
• 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), wherein a dye having an absorption maximum in a wavelength range from 570 to 605 nm is contained in the display filter.

2. The display filter of claim 1, 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.

3. The display filter of claim 1, wherein visible light ray reflectance on a surface of the functional transparent layer (A) is 2% or less.

4. The display filter of claim 1, wherein visible light ray transmittance is from 30 to 85%.

5. The display filter of claim 1, wherein transmittance minimum in a wavelength range of from 800 to 1100 nm is 20% or less.

6. The display filter of claim 1, wherein a total thickness of the polymer film in entirety of the filter is 0.3 nm or more.

7. The display filter of claim 1, wherein a polymer film for increasing a total thickness capable of containing a dye is provided.

8. A display apparatus, comprising:

a display for representing an image; and

a display filter of claim 1, disposed on a display screen.

9. The display filter of claim 1, 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) and the transparent adhesive layer (C).

10. The display filter of claim 9, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

11. The display filter of claim 1, wherein the dye is a tetraazaporphyrin compound.

12. The display filter of claim 11, wherein the tetraazaporphyrin compound is expressed by the following formula (1):

wherein A¹ to A⁸ each individually represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, a hydroxy group, a sulfonic acid group, an alkyl group having carbon

atoms of from 1 to 20, a halogenoalkyl group, an alkoxy group, an alkoxyalkoxy group, aryloxy group, a monoalkylamino group, dialkylamino group, an aralkyl group, an aryl group, a heteroaryl group, an alkylthio group, or an arylthio group;

combinations of A¹ and A², A³ and A⁴, A⁵ and A⁶, and A⁷ and A⁸ may each individually form a ring except an aromatic ring via a connecting group; and

M represents two hydrogen atoms, a divalent metal atom, a trivalent metal atom having one substituent, a tetravalent metal atom having two substituents, or an oxy metal atom.

13. The display filter of claim 1, wherein a hard coat layer (F) is formed on both surfaces or one surface of the polymer film (B).

14. The display filter of claim 13, 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) and the hard coat layer (F).

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

16. The display filter of claim 1, wherein an adhesive layer (E) is disposed between the functional transparent layer (A) and the polymer film (B).

17. The display filter of claim 16, 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) and the adhesive layer (E).

18. The display filter of claim 17, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 run is contained.

19. The display filter of claim 16, wherein a hard coat layer (F) is formed on both surfaces or one surface of the polymer film (B).

20. The display filter of claim 19, 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), the adhesive layer (E) and the hard coat layer (F).

21. The display filter of claim 20, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

22. 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).

23. The display filter of claim 22, 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.

24. The display filter of claim 22, 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).

25. The display filter of claim 22, wherein the transparent electrically conductive layer (D) is constituted by firstly depositing 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 deposit, further depositing a high-refractive-index thin film layer (Dt).

26. The display filter of claim 25, 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.

27. The display filter of claim 25, wherein at least one layer of a plurality of metallic thin film layers (Din) is formed of silver or an alloy comprising silver.

28. The display filter of claim 22, wherein a hard coat layer (F) is formed on both surfaces or one surface of the polymer film (B).

29. The display filter of claim 28, 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) and the hard coat layer (F).

30. The display filter of claim 29, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

31. The display filter of claim 22, 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) and a transparent electrically conductive layer (D).

32. The display filter of claim 31, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

33. The display filter of claim 22, wherein a portion or entirety of the transparent electrically conductive layer (D) is constituted by an electrically conductive mesh.

34. The display filter of claim 33, wherein an electrode electrically connected with the transparent electrically conductive layer (D) is formed.

35. The display filter of claim 34, wherein an electrode is formed in an electrically conducting portion a part of which is exposed.

36. The display filter of claim 35, wherein the filter is shaped into a rectangle and electrodes are formed in two surrounding sides facing to each other.

37. The display filter of claim 35, where the electrode electrically connected with the transparent electrically conductive layer (D) is formed on a surface of a peripheral edge of the filter.

38. The display filter of claim 22, wherein an electrode electrically connected with the transparent electrically conductive layer (D) is formed.

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

laminating a display filter of claim 38 on a display screen of a display apparatus via a transparent adhesive layer (C); and

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

40. The display filter of claim 38, 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.

41. The display filter of claim 40, wherein the filter is shaped into a rectangle and electrodes are formed in two surrounding sides facing to each other.

42. The display filter of claim 40, where the electrode electrically connected with the transparent electrically conductive layer (D) is formed on a surface of a peripheral edge of the filter.

43. The display filter of claim 38, 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.

44. The display filter of claim 43, wherein the filter is shaped into a rectangle and electrodes are formed in two surrounding sides facing to each other.

45. The display filter of claim 43, where the electrode electrically connected with the transparent electrically conductive layer (D) is formed on a surface of a peripheral edge of the filter.

46. The display filter of claim 38, wherein an electrode is formed in an electrically conducting portion a part of which is exposed.

47. The display filter of claim 46, wherein the filter is shaped into a rectangle and electrodes are formed in two surrounding sides facing to each other.

48. The display filter of claim 46, where the electrode electrically connected with the transparent electrically conductive layer (D) is formed on a surface of a peripheral edge of the filter.

49. The display filter of claim 22, wherein an adhesive layer (B) is disposed between the functional transparent layer (A) and the polymer film (B).

50. The display filter of claim 49, wherein a hard coat layer (F) is formed on both surfaces or one surface of the polymer film (B).

51. The display filter of claim 50, 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).

52. The display filter of claim 51, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

53. The display filter of claim 49, 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) and the adhesive layer (E).

54. The display filter of claim 53, wherein a near-infrared ray absorption dye having an absorption maximum in a wavelength range of from 800 to 1100 nm is contained.

55. 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 ground conductor of the display apparatus and the transparent electrically conductive layer (D), wherein a dye having an absorption maximum in a wavelength range from 570 to 605 nm is contained in the laminate filter.

56. 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 ground conductor and the transparent electrically conductive layer (D), wherein a dye having an absorption maximum in a wavelength range from 570 to 605 nm is contained in the laminate filter.

57. 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), wherein a dye having an absorption maximum in a wavelength range from 570 to 605 nm is contained in the laminate filter.