Liquid crystal display device
OwnerKenji Nakao, Kazuhiro Nishiyama +3inventors
InventorsKenji Nakao, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki, Shigesumi Araki
Life of this patent
Estimating the term…
Abstract
Optical compensation elements include first phase plates and second phase plates, which have retardation in a thickness direction. When a value Δn/Δnλ is set by normalizing a retardation amount Δn·d relating to light of each of wavelengths by a retardation amount Δnλ·d relating to light of a predetermined wavelength λ, a normalized value Δn/Δnλ in the first phase plate is less than a normalized value Δn/Δnλ in a liquid crystal layer, and a normalized value Δn/Δnλ in the second phase plate is greater than the normalized value Δn/Δnλ in the liquid crystal layer, with respect to light of wavelengths other than the predetermined wavelength.
Claims10
A liquid crystal display device comprising:
- a liquid crystal panel that is configured to include a liquid crystal layer held between a pair of substrates;
- and
- an optical compensation element that optically compensates retardation of the liquid crystal layer in a predetermined display state in which a voltage is applied to the liquid crystal layer,
- wherein an image is displayed by varying a birefringence amount due to liquid crystal molecules included in the liquid crystal layer by the voltage applied to the liquid crystal layer,
- the optical compensation element includes at least a first phase plate and a second phase plate, which have retardation in a thickness direction, and
- when a value Δn/Δnλ is set by normalizing a retardation amount Δn·d relating to light of each of wavelengths (Δn=(nx+ny)/2−nz, where nx and ny are in-plane principal refractive indices and nz is a principal refractive index in the thickness direction, and d is a thickness) by a retardation amount Δnλ·d relating to light of a predetermined wavelength λ, a normalized value Δn/Δnλ in the first phase plate is less than a normalized value Δn/Δnλ in the liquid crystal layer, and a normalized value Δn/Δnλ in the second phase plate is greater than the normalized value Δn/Δnλ in the liquid crystal layer, with respect to light of wavelengths other than the predetermined wavelength.
Dependencies are inferred from the claim text.