LCD device with film member attached to polarizing element and satisfies a predetermined contast ratio to be equal or greater than 0.025 for all azimuth angels

A liquid crystal display device comprising:

• a liquid crystal display cell including liquid crystal between two substrates facing to each other;
• a polarizing element provided on each side of the liquid crystal display cell;
• and
• at least one film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element,
• the polarizing element being formed from a film made of polyvinylalcohol resin in which iodine or dichromatic dye is absorbed and oriented,
• the film member being attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween, and when attached to another film member, the film member being attached to the another film member with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween,
• the film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element having an absolute value of a photoelastic coefficient of less than 10×10−8 cm2/N and having a water absorption of less than 2.0%;
• wherein a first protective film is attached on the liquid crystal display cell side of the polarizing element on the observation side,
• a second protective film is attached on the observation side of the polarizing element on the observation side,
• a third protective film is attached on the liquid crystal display cell side of the polarizing element on the rear side,
• a fourth protective film is attached on the rear side of the polarizing element on the rear side, and
• each protective film is attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween;
• wherein the liquid crystal display cell provides black display under conditions where most liquid crystal molecules are substantially vertically aligned to the substrates and an in-plane retardation is substantially 0, and
• when a corrected retardation R in the thickness direction is defined according to the following formula (3):
• [Formula 3]
• R=(1.3−0.6×na)×Rxz+(0.7−0.3×na)×Rxy (3)
• in the formula, na representing an average refractive index of light at a wavelength of 550 nm, Rxz representing a retardation in the thickness direction of light at a wavelength of 550 nm, and Rxy representing a retardation in the in-plane direction of light at a wavelength of 550 nm,
• a corrected retardation R1 in the thickness direction of the first protective film, a corrected retardation R3 in the thickness direction of the third protective film, and a corrected retardation Rlc in the thickness direction of the liquid crystal display cell at black display satisfy a relationship shown by the following formula (4)
• [Formula 4]
• 0 nm≦R1+R3−Rlc≦35 nm (4).

A film-attached polarizing element comprising:

• a polarizing element and a film member,
• the polarizing element being formed from a film made of polyvinylalcohol resin in which iodine or dichromatic dye is absorbed and oriented,
• the film member being attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween, and when attached to another film member, the film member being attached to the another film member with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween,
• the film member or at least one of the film member and the another film member when the film member being attached to the another film member having an absolute value of a photoelastic coefficient of less than 10×10−8 cm2/N and having a water absorption of less than 2.0%, and
• wherein the film member attached to a liquid crystal display cell side of the polarizing element has a moisture permeability lower than a moisture permeability of the film member attached to the other side of the polarizing element.

A liquid crystal display device comprising:

• a liquid crystal display cell including liquid crystal between two substrates facing to each other;
• a polarizing element provided on each side of the liquid crystal display cell;
• and
• at least one film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element,
• the polarizing element being formed from a film made of polyvinylalcohol resin in which iodine or dichromatic dye is absorbed and oriented,
• the film member being attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween, and when attached to another film member, the film member being attached to the another film member with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween,
• the film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element having an absolute value of a photoelastic coefficient of less than 10×10−8 cm2/N and having a water absorption of less than 2.0%;
• wherein a first protective film is attached on the liquid crystal display cell side of the polarizing element on the observation side,
• a second protective film is attached on the observation side of the polarizing element on the observation side,
• a third protective film is attached on the liquid crystal display cell side of the polarizing element on the rear side,
• a fourth protective film is attached on the rear side of the polarizing element on the rear side, and
• each protective film is attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween;
• wherein the protective films are made of resins having different moisture permeabilities in a combination of the first and second protective films and/or in a combination of the third and fourth protective films;
• wherein the liquid crystal display device satisfies at least one of the following formula (1) and (2):
• [formula 1]
• Moisture permeability of the first protective film<Moisture permeability of the second protective film (1)
• [formula 2]
• Moisture permeability of the third protective film<Moisture permeability of the fourth protective film (2).

A liquid crystal display device comprising:

• a liquid crystal display cell including liquid crystal between two substrates facing to each other;
• a polarizing element provided on each side of the liquid crystal display cell;
• and
• at least one film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element,
• the polarizing element being formed from a film made of polyvinylalcohol resin in which iodine or dichromatic dye is absorbed and oriented,
• the film member being attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween, and when attached to another film member, the film member being attached to the another film member with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween,
• the film member provided in at least either one area of areas between the liquid crystal display cell and the polarizing element having an absolute value of a photoelastic coefficient of less than 10×10−8 cm2/N and having a water absorption of less than 2.0%;
• wherein a first protective film is attached on the liquid crystal display cell side of the polarizing element on the observation side,
• a second protective film is attached on the observation side of the polarizing element on the observation side,
• a third protective film is attached on the liquid crystal display cell side of the polarizing element on the rear side,
• a fourth protective film is attached on the rear side of the polarizing element on the rear side, and
• each protective film is attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween;
• wherein a peripheral edge crossing the absorption axis direction of the polarizing element adjacent to the protective film is coated with a sealing agent having hydrophobicity.

A film-attached polarizing element comprising:

• a polarizing element and a film member,
• the polarizing element being formed from a film made of polyvinylalcohol resin in which iodine or dichromatic dye is absorbed and oriented,
• the film member being attached to the polarizing element with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween, and when attached to another film member, the film member being attached to the another film member with a cohesive layer and/or an adhesive layer having a thickness of less than 10 μm therebetween,
• the film member or at least one of the film member and the another film member when the film member being attached to the another film member having an absolute value of a photoelastic coefficient of less than 10×10−8 cm2/N and having a water absorption of less than 2.0%, and
• wherein a peripheral edge crossing an absorption axis direction of the polarizing element is coated with a sealing agent having hydrophobicity.