A display apparatus includes a liquid crystal panel, a light source configured to provide light to the liquid crystal panel, and an optical member disposed between the liquid crystal panel and the light source. The optical member includes a diffuser sheet that is configured to diffuse the light from the light source, and a deformation preventing layer including a first material having a lower expansion or contraction rate than the diffuser sheet.

The present disclosure provides a reflective polarizer module characterized by comprising: a first light collecting sheet including a first structuring pattern having a first unit light collector, the cross-sectional area of which is reduced progressively upward, which is disposed continuously in a repetitive manner, and collecting a light transmitted from below; a reflective polarizer sheet disposed in a stacked configuration on the top of the first light collecting sheet, and selectively transmitting the light by having a plurality of stacked layers having mutually different refractive indices; and a light recycling improving sheet disposed at the bottom of the reflective polarizer sheet, and randomly changing the polarized direction of the light which is not transmitted through the reflective polarizer sheet but is reflected downward.

Provided is a display apparatus including a backlight unit; a substrate disposed above the backlight unit and including a first surface facing the backlight unit and a second surface opposite to the first surface; a plurality of color filters arranged on the second surface of the substrate; a polarizing plate disposed above the plurality of color filters; and a plurality of polarizers interposed between the polarizing plate and the backlight unit and arranged to correspond to the plurality of color filters, respectively.

An optical apparatus is configured to introduce light from an object to an image pickup element, and includes first, second, and third retardation plates, a polarizer, and a setter. The first retardation plate, the second retardation plate, and the polarizer are arranged in this order from a side of the object to a side of the image pickup element. The slow axis direction or the fast axis direction of the second retardation plate tilts to the slow axis direction or the fast axis direction of the first retardation plate. The setter sets the retardation of the second retardation plate according to the polarization component of the light from the object.

Provided is an optical apparatus that is capable of switching between a state in which the optical apparatus can reflect light and a state in which the optical apparatus can output light and suppressing deterioration of display quality of a light reflection image. The optical apparatus includes: a light emitting device having a light emitting surface; an absorption type polarizing plate disposed opposite to the light emitting surface of the light emitting device; a liquid crystal optical element disposed between the light emitting device and the absorption type polarizing plate; a reflection type polarizing plate disposed between the light emitting device and the liquid crystal optical element; and an adhesive layer disposed on a surface of the reflection type polarizing plate that faces the light emitting device.

A display apparatus is disclosed. The display apparatus includes a backlight configured to emit light; a first polarizing plate, disposed in front of the backlight, configured to polarize light emitted from the backlight in a first direction; and a plurality of display panels sequentially disposed in front of the first polarizing plate, wherein each of the plurality of display panels is configured to include a liquid crystal panel and a color filter disposed in front of the liquid crystal panel, and wherein a display panel disposed at a farthest distance from the first polarizing plate from among the plurality of display panels is configured to include a second polarizing plate that polarizes the light of the first direction in a second direction.

This polarized light-emitting film contains a water-soluble coumarin compound represented by formula (1) (in formula (1), A represents an optionally substituted coumarin skeleton, X represents a sulfo group or a carboxyl group, and n represents an integer of 1 to 3.) or a salt thereof.

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Methods and systems are provided for separating polarized UV light. In one example, a method may include passing polarized source light through a first prism, the polarized source light including desired light and undesired light, separating the desired light from the fundamental light, and passing the separated desired light through a second prism. The separated desired light which is passed through the second prism may then be further passed through a spatial filter.

In a projection display system, a light-emitting diode (LED) can generate unpolarized light. A light guide can receive the unpolarized light from a perimeter of the light guide and guide the unpolarized light between a light emission surface and an opposing surface as guided light. The light guide can include a plurality of light-extraction features that can direct a portion of the guided light out of the light guide through the light emission surface as unpolarized emitted light. A polarizing film can reflect at least some of a first polarization state of the unpolarized emitted light into the light guide through the light emission surface and can transmit at least some of a second polarization state of the unpolarized emitted light through the polarizing film to form a polarized light beam. An angular reduction film can reduce a range of propagation angles of the polarized light beam.

This polarizer is a polarizer having a wire grid structure that includes a transparent substrate, a dielectric film which extends across one surface of the transparent substrate and has a lower refractive index than the transparent substrate, and a plurality of projections which extend in a first direction on top of the dielectric film and are arrayed periodically at a pitch that is shorter than the wavelength of the light in the used light region, wherein the transparent substrate has a thermal conductivity of at least 10 W/m.Math.K but not more than 40 W/m.Math.K, the plurality of projections each have, in order from the side closer to the dielectric film, a first dielectric layer, a reflective layer and a functional layer, the reflective layer contains a metal or a metal compound, and the functional layer is formed from a material different from the reflective layer.