Liquid crystal display device

• US 20060215079A1
• Filed: 03/16/2006
• Published: 09/28/2006
• Est. Priority Date: 03/17/2005
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Suzuki, Takato, Fukuda, Kenichi
• Granted Patent: US 7,502,088 B2
• Time in Patent Office: Days
• US Class Current: 349/96
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers

Abstract

A liquid crystal display device comprising: a first protective film; a first polarizing film; an optical compensation region; a liquid crystal cell comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer; a second polarizing film; and a second protective layer, in this order, wherein at a black display, liquid crystal molecules in the liquid crystal layer are aligned in parallel with surfaces of said pair of substrates, an antiglare layer is provided to at least one of the first protective film and the second protective layer, and the antiglare layer has a haze value attributable to internal scattering of from 5 to 35%, and a haze value attributable to surface scattering of from 1 to 10%.

Claims

1. A liquid crystal display device comprising:

a first protective film;

a first polarizing film;

an optical compensation region;

a liquid crystal cell comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer;

a second polarizing film; and

a second protective layer, in this order,

wherein at a black display, liquid crystal molecules in the liquid crystal layer are aligned in parallel with surfaces of said pair of substrates,

an antiglare layer is provided to at least one of the first protective film and the second protective layer, and

the antiglare layer has a haze value attributable to internal scattering of from 5 to 35%, and a haze value attributable to surface scattering of from 1 to 10%.

3. The liquid crystal display device as claimed in claim 1,

wherein the haze value attributable to internal scattering of the antiglare layer is from 5 to 20% and the haze value attributable to surface scattering of the antiglare layer is from 1 to 10%.

7. The liquid crystal display device as claimed in claim 1,

wherein the antiglare layer is formed from a coating composition comprising a light-transparent resin, a light-transparent fine particle and multiple kinds of solvents, and

the multiple kinds of solvents comprises a main solvent incapable of dissolving the transparent support and a small amount of a solvent having a hydroxyl group.

11. The liquid crystal display device as claimed in claim 7,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(meth)acrylate-based polymer having an acryl content of 50 to 100 mass %.

15. The liquid crystal display device as claimed in claim 7,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(styrene-acryl) copolymer having an acryl content of 50 to 100 mass %.

19. The liquid crystal display device as claimed in claim 3,

wherein the refractive index of the low refractive index layer is from 1.30 to 1.48, the low refractive index layer comprises a fluorine-containing polymer, and the fluorine-containing polymer comprises from 30 to 80 mass % of a fluorine atom.

21. The liquid crystal display device as claimed in claim 3,

wherein the low refractive index layer is formed by coating a composition having heat curability and/or photocurability, the composition mainly comprising a fluorine-containing polymer containing a crosslinking or polymerizable functional group.

23. The liquid crystal display device as claimed in claim 19,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) at least one said fluorine-containing polymer, (B) at least one inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer, and (C) at least one hydrolysate and/or partial condensate of an organosilane represented by formula (1), which is produced in the presence of an acid catalyst:

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

25. The liquid crystal display device as claimed in claim 21,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) at least one said fluorine-containing polymer, (B) at least one inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer, and (C) at least one hydrolysate and/or partial condensate of an organosilane represented by formula (1), which is produced in the presence of an acid catalyst:

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

27. The liquid crystal display device as claimed in claim 1,

wherein the antiglare layer is a cured film formed by coating and curing a curable coating composition comprising a hydrolysate and/or a partial condensate of an organosilane represented by formula (1):

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

31. The liquid crystal display device as claimed in claim 23,

wherein the inorganic fine particle (B) has a hollow structure.

33. The liquid crystal display device as claimed in claim 25,

wherein the inorganic fine particle (B) has a hollow structure.

37. A liquid crystal display device as claimed in claim 1,

wherein the optical compensation region comprises at least one retardation region satisfying any one of the following relations (A) to (D).

(A) 100 nm≦

Re≦

400 nm, and −

50 nm≦

Rth≦

50 nm.

(B) 60 nm≦

Re≦

200 nm, and 30 nm≦

Rth≦

00 nm.

(C) 0 nm≦

Re≦

20 nm, and −

400 nm≦

Rth≦

−

50 nm.

(D) 30 nm≦

Re≦

150 nm, and 100 nm≦

Rth≦

400 nm.

(wherein Re designates the in-plane retardation and Rth designates the retardation in the thickness direction.)

41. The liquid crystal display device as claimed in claim 1,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 70 to 330 nm,

the first retardation region has a value Nz of from more than 0 to less than 0.5,

the second retardation region has an in-plane retardation Re of from 0 to 100 mm,

the second retardation region has a retardation Rth in thickness direction of from 10 to 140 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

45. The liquid crystal display device as claimed in claim 41,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

49. The liquid crystal display device as claimed in claim 41,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

53. The liquid crystal display device as claimed in claim 1,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 20 to 150 nm,

the first retardation region has a value Nz of from 1.5 to 7,

the second retardation region has an in-plane retardation Re of from 0 to 50 nm,

the second retardation region has a retardation Rth in thickness direction of from −

80 to −

400 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

57. The liquid crystal display device as claimed in claim 53,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

61. The liquid crystal display device as claimed in claim 53,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

65. The liquid crystal display device as claimed in claim 53,

wherein the second retardation region cpmprises a retardation layer comprising a rod-like liquid crystal compound oriented substantially in vertical alignment.

69. The liquid crystal display device as claimed in claim 1,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film has a retardation Rth of 40 to −

50 nm in thickness direction.

73. The liquid crystal display device as claimed in claim 1,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film is a cellulose acylate film or a norbornene-based film.

2. A liquid crystal display device comprising:

a first protective film;

a first polarizing film;

an optical compensation region;

a liquid crystal cell comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer;

a second polarizing film; and

a second protective layer, in this order,

wherein at a black display, liquid crystal molecules in the liquid crystal layer are aligned in parallel with surfaces of said pair of substrates,

an antiglare layer is provided to at least one of the first protective film and the second protective layer,

at least one of the first and second protective films having the antiglare layer is an antiglare antireflection film comprising a transparent support, the antiglare layer and a low refractive index layer having a refractive index lower than that of the antiglare layer,

the antiglare antireflection film has a haze value attributable to internal scattering of from 5 to 35%, and a haze value attributable to surface scattering of from 1 to 10%.

4. The liquid crystal display device as claimed in claim 2,

wherein the haze value attributable to internal scattering of the antiglare antireflection film is from 5 to 20% and the haze value attributable to surface scattering of the antiglare antireflection film is from 1 to 10%.

8. The liquid crystal display device as claimed in claim 2,

wherein the antiglare layer is formed from a coating composition comprising a light-transparent resin, a light-transparent fine particle and multiple kinds of solvents, and

the multiple kinds of solvents comprises a main solvent incapable of dissolving the transparent support and a small amount of a solvent having a hydroxyl group.

12. The liquid crystal display device as claimed in claim 8,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(meth)acrylate-based polymer having an acryl content of 50 to 100 mass %.

16. The liquid crystal display device as claimed in claim 8,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(styrene-acryl) copolymer having an acryl content of 50 to 100 mass %.

28. The liquid crystal display device as claimed in claim 2,

wherein the antiglare layer and the low refractive index layer each is a cured film formed by coating and curing a curable coating composition comprising a hydrolysate and/or a partial condensate of an organosilane represented by formula (1):

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

35. The liquid crystal display device as claimed in claim 2,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) a fluorine-free polymer and (B) an inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer and having a hollow structure.

38. A liquid crystal display device as claimed in claim 2,

wherein the optical compensation region comprises at least one retardation region satisfying any one of the following relations (A) to (D).

(A) 100 nm≦

Re≦

400 nm, and −

50 nm≦

Rth≦

50 mm.

(B) 60 nm≦

Re≦

200 nm, and 30 nm≦

Rth≦

100 nm.

(C) 0 nm≦

Re≦

20 nm, and −

400 nm≦

Rth≦

−

50 nm.

(D) 30 nm≦

Re≦

150 nm, and 100 nm≦

Rth≦

400 nm.

(wherein Re designates the in-plane retardation and Rth designates the retardation in the thickness direction.)

42. The liquid crystal display device as claimed in claim 2,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 70 to 330 nm,

the first retardation region has a value Nz of from more than 0 to less than 0.5,

the second retardation region has an in-plane retardation Re of from 0 to 100 nm,

the second retardation region has a retardation Rth in thickness direction of from 10 to 140 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

46. The liquid crystal display device as claimed in claim 42,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

50. The liquid crystal display device as claimed in claim 42,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

54. The liquid crystal display device as claimed in claim 2,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 20 to 150 nm,

the first retardation region has a value Nz of from 1.5 to 7,

the second retardation region has an in-plane retardation Re of from 0 to 50 nm,

the second retardation region has a retardation Rth in thickness direction of from −

80 to −

400 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

58. The liquid crystal display device as claimed in claim 54,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

62. The liquid crystal display device as claimed in claim 54,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

66. The liquid crystal display device as claimed in claim 54,

wherein the second retardation region cpmprises a retardation layer comprising a rod-like liquid crystal compound oriented substantially in vertical alignment.

70. The liquid crystal display device as claimed in claim 2,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film has a retardation Rth of 40 to −

50 nm in thickness direction.

74. The liquid crystal display device as claimed in claim 2,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film is a cellulose acylate film or a norbornene-based film.

5. A liquid crystal display device comprising:

a first protective film;

a first polarizing film;

an optical compensation region;

a liquid crystal cell comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer;

a second polarizing film; and

a second protective layer, in this order,

wherein at a black display, liquid crystal molecules in the liquid crystal layer are aligned in parallel with surfaces of said pair of substrates,

an antiglare layer is provided to at least one of the first protective film and the second protective layer, and

one(s) having the antiglare layer of the first protective film and the second protective layer has a haze value attributable to internal scattering of from 0 to 5%, and a haze value attributable to surface scattering is from 1 to 30%.

9. The liquid crystal display device as claimed in claim 5,

wherein the antiglare layer is formed from a coating composition comprising a light-transparent resin, a light-transparent fine particle and multiple kinds of solvents, and

the multiple kinds of solvents comprises a main solvent incapable of dissolving the transparent support and a small amount of a solvent having a hydroxyl group.

13. The liquid crystal display device as claimed in claim 9,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(meth)acrylate-based polymer having an acryl content of 50 to 100 mass %.

17. The liquid crystal display device as claimed in claim 9,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(styrene-acryl) copolymer having an acryl content of 50 to 100 mass %.

29. The liquid crystal display device as claimed in claim 5,

wherein the antiglare layer is a cured film formed by coating and curing a curable coating composition comprising a hydrolysate and/or a partial condensate of an organosilane represented by formula (1):

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

39. A liquid crystal display device as claimed in claim 5,

wherein the optical compensation region comprises at least one retardation region satisfying any one of the following relations (A) to (D).

(A) 100 nm≦

Re≦

400 nm, and −

50 nm Rth≦

50 nm.

(B) 60 nm≦

Re≦

200 nm, and 30 nm≦

Rth≦

100 nm.

(C) 0 nm≦

Re≦

20 nm, and −

400 nm≦

Rth≦

−

50 nm.

(D) 30 nm≦

Re≦

150 nm, and 100 nm≦

Rth≦

400 nm.

(wherein Re designates the in-plane retardation and Rth designates the retardation in the thickness direction.)

43. The liquid crystal display device as claimed in claim 5,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 70 to 330 nm,

the first retardation region has a value Nz of from more than 0 to less than 0.5,

the second retardation region has an in-plane retardation Re of from 0 to 100 nm,

the second retardation region has a retardation Rth in thickness direction of from 10 to 140 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

47. The liquid crystal display device as claimed in claim 43,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

51. The liquid crystal display device as claimed in claim 43,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

55. The liquid crystal display device as claimed in claim 5,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 20 to 150 nm,

the first retardation region has a value Nz of from 1.5 to 7,

the second retardation region has an in-plane retardation Re of from 0 to 50 nm,

the second retardation region has a retardation Rth in thickness direction of from −

80 to −

400 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

59. The liquid crystal display device as claimed in claim 55,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

63. The liquid crystal display device as claimed in claim 55,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

67. The liquid crystal display device as claimed in claim 55,

wherein the second retardation region cpmprises a retardation layer comprising a rod-like liquid crystal compound oriented substantially in vertical alignment.

71. The liquid crystal display device as claimed in claim 5,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film has a retardation Rth of 40 to −

50 nm in thickness direction.

75. The liquid crystal display device as claimed in claim 5,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film is a cellulose acylate film or a norbornene-based film.

6. A liquid crystal display device comprising:

a first protective film;

a first polarizing film;

an optical compensation region;

a liquid crystal cell comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer;

a second polarizing film; and

a second protective layer, in this order,

wherein at a black display, liquid crystal molecules in the liquid crystal layer are aligned in parallel with surfaces of said pair of substrates,

at least one of the first and second protective films is an antiglare antireflection film comprising a transparent support, the antiglare layer and a low refractive index layer having a refractive index lower than that of the antiglare layer, and

the antiglare antireflection film has a haze value attributable to internal scattering of from 0 to 5%, and a haze value attributable to surface scattering of from 1 to 30%.

10. The liquid crystal display device as claimed in claim 6,

wherein the antiglare layer is formed from a coating composition comprising a light-transparent resin, a light-transparent fine particle and multiple kinds of solvents, and

the multiple kinds of solvents comprises a main solvent incapable of dissolving the transparent support and a small amount of a solvent having a hydroxyl group.

14. The liquid crystal display device as claimed in claim 10,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(meth)acrylate-based polymer having an acryl content of 50 to 100 mass %.

18. The liquid crystal display device as claimed in claim 10,

wherein the light-transparent resin mainly comprises a trifunctional or higher functional (meth)acrylate monomer, and

the light-transparent particle is a crosslinked poly(styrene-acryl) copolymer having an acryl content of 50 to 100 mass %.

20. The liquid crystal display device as claimed in claim 6,

wherein the refractive index of the low refractive index layer is from 1.30 to 1.48, the low refractive index layer comprises a fluorine-containing polymer, and the fluorine-containing polymer comprises from 30 to 80 mass % of a fluorine atom.

22. The liquid crystal display device as claimed in claim 6,

wherein the low refractive index layer is formed by coating a composition having heat curability and/or photocurability, the composition mainly comprising a fluorine-containing polymer containing a crosslinking or polymerizable functional group.

24. The liquid crystal display device as claimed in claim 20,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) at least one said fluorine-containing polymer, (B) at least one inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer, and (C) at least one hydrolysate and/or partial condensate of an organosilane represented by formula (1), which is produced in the presence of an acid catalyst:

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

26. The liquid crystal display device as claimed in claim 22,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) at least one said fluorine-containing polymer, (B) at least one inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer, and (C) at least one hydrolysate and/or partial condensate of an organosilane represented by formula (1), which is produced in the presence of an acid catalyst:

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

30. The liquid crystal display device as claimed in claim 6,

wherein the antiglare layer and the low refractive index layer each is a cured film formed by coating and curing a curable coating composition comprising a hydrolysate and/or a partial condensate of an organosilane represented by formula (1):

(R¹⁰)_m—

Si(X)_4-m 

 

Formula (1)

(wherein R¹⁰ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X represents a hydroxyl group or a hydrolyzable group, and m represents an integer of 1 to

     3).

32. The liquid crystal display device as claimed in claim 24,

wherein the inorganic fine particle (B) has a hollow structure.

34. The liquid crystal display device as claimed in claim 26,

wherein the inorganic fine particle (B) has a hollow structure.

36. The liquid crystal display device as claimed in claim 6,

wherein the low refractive index layer is a cured film formed by coating and curing a curable composition comprising (A) a fluorine-free polymer and (B) an inorganic fine particle having an average particle diameter corresponding to 30 to 100% of thickness of the low refractive index layer and having a hollow structure.

40. A liquid crystal display device as claimed in claim 6,

wherein the optical compensation region comprises at least one retardation region satisfying any one of the following relations (A) to (D).

(A) 100 nm≦

Re≦

400 nm, and −

50 nm≦

Rth≦

50 nm.

(B) 60 nm≦

Re≦

200 nm, and 30 nm≦

Rth≦

100 nm.

(C) 0 nm≦

RE≦

20 nm, and −

400 nm≦

Rth≦

—

50 mm.

(D) 30 nm≦

Re≦

150 nm, and 100 nm≦

Rth≦

400 mm.

(wherein Re designates the in-plane retardation and Rth designates the retardation in the thickness direction.)

44. The liquid crystal display device as claimed in claim 6,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 70 to 330 nm,

the first retardation region has a value Nz of from more than 0 to less than 0.5,

the second retardation region has an in-plane retardation Re of from 0 to 100 nm,

the second retardation region has a retardation Rth in thickness direction of from 10 to 140 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

48. The liquid crystal display device as claimed in claim 44,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

52. The liquid crystal display device as claimed in claim 44,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

56. The liquid crystal display device as claimed in claim 6,

wherein the optical compensation region comprises a first retardation region and a second retardation region,

the first retardation region has an in-plane retardation Re of from 20 to 150 nm,

the first retardation region has a value Nz of from 1.5 to 7,

the second retardation region has an in-plane retardation Re of from 0 to 50 nm,

the second retardation region has a retardation Rth in thickness direction of from −

80 to −

400 nm, and

a transmission axis of the first polarizing film is parallel to a slow axis direction of the liquid crystal molecules at the black display.

60. The liquid crystal display device as claimed in claim 56,

wherein the first polarizing film, the first retardation region, the second retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially parallel to the transmission axis of the first polarizing film.

64. The liquid crystal display device as claimed in claim 56,

wherein the first polarizing film, the second retardation region, the first retardation region and the liquid crystal cell are disposed in this order, and

a slow axis of the first retardation region is substantially orthogonal to the transmission axis of the first polarizing film.

68. The liquid crystal display device as claimed in claim 56,

wherein the second retardation region cpmprises a retardation layer comprising a rod-like liquid crystal compound oriented substantially in vertical alignment.

72. The liquid crystal display device as claimed in claim 6,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film has a retardation Rth of 40 to −

50 nm in thickness direction.

76. The liquid crystal display device as claimed in claim 6,

wherein the liquid crystal display device comprises a protective film between the second polarizing film and the substrate, and

the protective film is a cellulose acylate film or a norbornene-based film.