The present application relates to an optical film layer and a display device. The optical film layer comprises: an isotropic optical layer, a plurality of grooves being formed on one side of the isotropic optical layer; a single optical axis anisotropic optical layer, comprising a plate-shaped part and a plurality of convex structures which match the shape and size of the grooves and which are attached to one side of the plate-shaped part, the ordinary light refractive index of the single optical axis anisotropic optical layer is greater than that of the isotropic optical layer; a first grating layer, stacked on the side of the single optical axis anisotropic optical layer away from the isotropic optical layer or embedded in the side of the single optical axis anisotropic optical layer away from the isotropic optical layer.

An optical device is provided that includes a first optical member made of a birefringent material and disposed so that an optical axis of the first optical member is neither parallel nor orthogonal to a direction in which incident light travels. Moreover, a second optical member made of a birefringent material is disposed so that an optical axis of the second optical member is neither parallel nor orthogonal to the direction in which the incident light travels. A third optical member is disposed between the first and second optical members and generates an optical path difference of {¼+m×(½)}×λ (m is an integer) between orthogonal polarization components of light emitted from the first optical member. At least one of the optical members is rotatable about an axis of the incident light.

A privacy display comprises a spatial light modulator and a compensated switchable liquid crystal retarder arranged between first and second polarisers arranged in series with the spatial light modulator. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field. In a wide angle mode of operation, the switchable liquid crystal retardance is adjusted so that off-axis luminance is substantially unmodified.

The present disclosure relates to a 3D display apparatus. The 3D display apparatus may include a first substrate, a second substrate, a liquid crystal layer between the first substrate and the second substrate, a first alignment layer on the first substrate, a second alignment layer on the second substrate, a polarizer, and an analyzer between the second alignment layer and the second substrate. The polarizer may be on a side of the first substrate opposite from the first alignment layer or between the first substrate and the first alignment layer. The polarizer may be configured to form two types of linearly polarized light being alternately arranged, and polarization directions of the two types of linearly polarized light are perpendicular to each other.

An optical film set that can prevent the warping. The optical film set includes: a first optical film arranged on a viewer side of a liquid crystal cell; and a second optical film arranged on a back surface side of the liquid crystal cell, wherein the first optical film includes a first glass film, a first adhesion layer, and a first polarizing plate, which includes a first polarizer and a first protective film, in the stated order, wherein the first glass film has a thickness of from 50 μm to 150 μm, wherein the first protective film has a modulus of elasticity of 1 GPa or more, wherein the first adhesion layer has a thickness of 10 μm or less, wherein the second optical film includes a second polarizing plate including a second polarizer, and wherein the second polarizer has a thickness of from 1 μm to 10 μm.

A display apparatus includes a first mirror and a half mirror between a display device and a concave mirror. The first mirror reflects emission light emitted from an elongate display surface of the display device, toward the half mirror. The half mirror reflects the light reflected by the first mirror, toward the concave mirror. The concave mirror reflects the light reflected by the half mirror, toward the half mirror. In a top view of the display apparatus, a line passing through a center of the display surface in a longitudinal direction and parallel to the longitudinal direction and a tangent line passing through a center of a reflection surface of the concave mirror in a longitudinal direction and parallel to the longitudinal direction intersect at a predetermined angle.

Provided is a display device including an array substrate, a pixel, a dimming element, and a counter substrate. The pixel is located over the array substrate and includes a first electrode, a second electrode, and a liquid crystal layer over the first electrode and the second electrode. The dimming element is located over the array substrate and includes a third electrode, the liquid crystal layer over the third electrode, and a fourth electrode over the liquid crystal layer. The counter substrate is located over the fourth electrode.

An electronic device is provided, which includes a first phase retardation element, a second phase retardation element and a liquid-crystal layer. The second phase retardation element is disposed on the first phase retardation element, and the liquid-crystal layer is disposed between the first phase retardation element and the second phase retardation element. In addition, the liquid-crystal layer includes a chiral agent, and a pitch of the chiral agent is between 7 μm and 25 μm. The first phase retardation element has a first in-plane retardation value and a first out-plane retardation value, and the second phase retardation element has a second in-plane retardation value and a second out-plane retardation value. The first in-plane retardation value and the second in-plane retardation value are between 20 nanometers and 70 nanometers, and the first out-plane retardation value and the second out-plane retardation value are between 170 nanometers and 210 nanometers.

A head-mounted apparatus include an eyepiece that include a variable dimming assembly and a frame mounting the eyepiece so that a user side of the eyepiece faces a towards a user and a world side of the eyepiece opposite the first side faces away from the user. The dynamic dimming assembly selectively modulates an intensity of light transmitted parallel to an optical axis from the world side to the user side during operation. The dynamic dimming assembly includes a variable birefringence cell having multiple pixels each having an independently variable birefringence, a first linear polarizer arranged on the user side of the variable birefringence cell, the first linear polarizer being configured to transmit light propagating parallel to the optical axis linearly polarized along a pass axis of the first linear polarizer orthogonal to the optical axis, a quarter wave plate arranged between the variable birefringence cell and the first linear polarizer, a fast axis of the quarter wave plate being arranged relative to the pass axis of the first linear polarizer to transform linearly polarized light transmitted by the first linear polarizer into circularly polarized light, and a second linear polarizer on the world side of the variable birefringence cell.

An optical device includes a first layer including a first birefringent material having a negative birefringence dispersion property. The optical device also includes a second layer including a second birefringent material having a positive birefringence dispersion property. The first layer and the second layer are structurally patterned to provide at least one predetermined optical function.