Liquid crystal display device

A liquid crystal display device, comprising:

• a liquid crystal display portion;
• and
• a backlight device provided on a side opposite to a display surface of the liquid crystal display portion, wherein:
• the liquid crystal display portion comprises a polarizing plate;
• the backlight device comprises N (N≧2) optical members;
• and
• when the N optical members are denoted by reference numerals 1, 2, . . . , and N in the stated order from a side on which the liquid crystal display portion is provided,
• the optical member 1 is brought into intimate contact with the liquid crystal display portion via an adhesive, and
• the optical member M (1<M≦N) is brought into intimate contact with the optical member M−1 via an adhesive, and strain per unit length on an optical member having a highest flexural rigidity (product of Young' s modulus and second moment of area) among the N optical members at least one of −10 to 10° C. and 40 to 70° C. is ⅕ or smaller of strain per unit length on the polarizing plate.

A liquid crystal display device, comprising:

• a liquid crystal display portion;
• and
• a backlight device provided on a side opposite to a display surface of the liquid crystal display portion, wherein:
• the liquid crystal display portion comprises:
• a first polarizing plate on a light incident side;
• a second polarizing plate on a light emitting side;
• and
• a transparent layer provided on a light incident side of the first polarizing plate;
• and
• when a thickness of the transparent layer is represented by ht and expressed as:
• h
• t
• 
• 
• 0
• =
• ɛ
• p
• 
• 
• 2
• 
• E
• p
• 
• 
• 2
• 
• h
• p
• 
• 
• 2
• 
• (
• h
• p
• 
• 
• 2
• +
• h
• g
• )
• -
• ɛ
• p
• 
• 
• 1
• 
• E
• p
• 
• 
• 1
• 
• h
• p
• 
• 
• 1
• 
• (
• h
• p
• 
• 
• 1
• +
• h
• g
• )
• ɛ
• t
• 
• E
• t
• 
• (
• h
• g
• +
• 2
• 
• h
• p
• 
• 
• 1
• )
• [
• Equation
• 
• 
• 1
• ]
• where ε, E, and h are strain per unit length under an environment in which temperature of the liquid crystal display portion is at least one of −10 to 10° C. and 40 to 70° C., and a Young's modulus, a thickness of each member, respectively, and indexes p1, p2, g, and t correspond to the first polarizing plate, the second polarizing plate, a substrate of the liquid crystal display portion, and the transparent layer, respectively, 0.5ht0≧ht≦1.5ht0 is satisfied.

A liquid crystal display device, comprising:

• a liquid crystal display portion;
• and
• a backlight device provided on a side opposite to a display surface of the liquid crystal display portion, wherein:
• the liquid crystal display portion comprises:
• a first polarizing plate on a light incident side;
• a second polarizing plate on a light emitting side;
• and
• a transparent layer provided on a light emitting side of the second polarizing plate;
• and
• when a thickness of the transparent layer is represented by ht and expressed as:
• h
• t
• 
• 
• 0
• =
• ɛ
• p
• 
• 
• 1
• 
• E
• p
• 
• 
• 1
• 
• h
• p
• 
• 
• 1
• 
• (
• h
• p
• 
• 
• 1
• +
• h
• g
• )
• -
• ɛ
• p
• 
• 
• 2
• 
• E
• p
• 
• 
• 2
• 
• h
• p
• 
• 
• 2
• 
• (
• h
• p
• 
• 
• 2
• +
• h
• g
• )
• ɛ
• t
• 
• E
• t
• 
• (
• h
• g
• +
• 2
• 
• h
• p
• 
• 
• 2
• )
• [
• Equation
• 
• 
• 2
• ]
• where ε, E, and h are strain per unit length under an environment in which temperature of the liquid crystal display portion is at least one of −10 to 10° C. and 40 to 70° C., and a Young's modulus, a thickness of each member, respectively, and indexes p1, p2, g, and t correspond to the first polarizing plate, the second polarizing plate, a substrate of the liquid crystal display portion, and the transparent layer, respectively, 0.5ht0≦ht≦1.5ht0 is satisfied.