A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a vertical orientation state and a twisting orientation state upon application of a voltage, each of the first and second polymer film substrates has an in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.

A view angle control structure and a display apparatus are provided. The display apparatus at least includes the view angle control structure, which includes first and second polarizing layers, first and second substrates and a polarization adjusting layer. The first and second polarizing layers are sequentially disposed on a transmission path of a light beam. The first and second substrates are sequentially disposed on the transmission path of the light beam and located between the first and second polarizing layers. At least one of the first and second substrates has a birefringence. The polarization adjusting layer is disposed on the transmission path of the light beam and located between the first and second substrates for changing a polarization state of the light beam according to an applied voltage. The view angle control structure and the display apparatus of the invention are excellent in anti-peeping effect, slimness and image quality.

A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a first orientation state and a second orientation state different from the first orientation state under an applied voltage, the first and second polymer film substrates have an in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.

The image display apparatus includes in the stated order from a viewer side thereof: a light-diffusing element; a circularly polarizing plate; and a backlight, wherein the light-diffusing element has a half-value angle of from 40 to 80, wherein the light-diffusing element has a diffuse reflectance of less than 1.5%, and wherein the backlight has a half-value angle of 30 or less. The circularly polarizing plate includes a polarizer and a first retardation layer in the stated order from the viewer side, the first retardation layer shows a refractive index characteristic of nx>nynz, the first retardation layer has an in-plane retardation Re(550) of from 120 nm to 160 nm, and an angle formed by an absorption axis of the polarizer and a slow axis of the first retardation layer is from 35 to 55, where Re(550) represents an in-plane retardation measured at 23 C. with light having a wavelength of 550 nm.

The present application relates to a light modulation device and a use thereof. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.

The present application relates to a light modulating device and an eyewear. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.

A liquid crystal retardation film, a polarizing plate for light emitting displays including the same, and a light emitting display including the same are provided. The liquid crystal retardation film includes: a first retardation layer having no alignment layer, a UV absorbent primer layer, and a second retardation layer sequentially formed in the stated order, wherein each of the first retardation layer and the second retardation layer may be a liquid crystal layer.

The present application relates to a light modulation device and a use thereof. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.

The present specification provides a multi-layer liquid crystal film including: a substrate; a first alignment film comprising an alignment material and an acrylate in which a weight ratio of the alignment material to the acrylate is 3:1 to 5:1; a first liquid crystal film provided on the first alignment film; a second alignment film provided on the first liquid crystal film; and a second liquid crystal film provided on the second alignment film, and a method for manufacturing a polarizing plate, the method including: laminating the multi-layer liquid crystal film to a polarizer and peeling off the substrate.

An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein the first optically anisotropic layer satisfies 220 nm<Re1(590)<330 nm, Re1(450)/Re1(550)1.0, Re1(650)/Re1(550)1.0, and 0.95<NZ1<2.00, and the second optically anisotropic layer satisfies 110 nm<Re2(590)<165 nm, Re2(450)/Re2(550)1.0, Re2(650)/Re2(550)1.0, and 1.5NZ20.00.