Optical stacks are disclosed. In particular, optical stacks having a reflective polarizer and an optical compensation film are disclosed.

A display device includes: a projection unit that emits light depending on a first picture signal, the first picture signal including three primary color signals; a display unit that includes a screen, a transmissive liquid crystal panel, and a polarizing plate, the transmissive liquid crystal panel changing a polarizing direction of each of three primary color lights from the projection unit, depending on a second picture signal including three primary color signals; and a display control unit that generates the first picture signal and the second picture signal from an input picture signal including three primary color signals, and that outputs a picture signal for controlling the projection unit based on the first picture signal and controlling the transmissive liquid crystal panel based on the second picture signal.

A phase delay device, its preparation method and a display equipment are provided. The phase delay device includes linear polarization layer, alignment layer and liquid crystal layer. The linear polarization layer is configured to convert received light into a linear polarization light; the alignment layer is configured to align liquid crystals of a first subpart of the liquid crystal layer based on a preset alignment angle; the liquid crystal layer is located at a side of the alignment layer away from the linear polarization layer, and includes a first subpart adjacent to the alignment layer, a second subpart having a spiral structure with a preset spiral angle and a third subpart; a liquid crystal alignment angle of the third subpart is determined based on the preset alignment angle and the preset spiral angle; birefringence of the liquid crystal layer does not decrease with an increase of visible light wavelength.

An array substrate and a reflective display substrate are disclosed. The array substrate includes a base, and a plurality of data lines and a plurality of sub-pixels that are disposed on the base. The sub-pixel includes a reflective pixel electrode and a TFT. An orthographic projection of the pixel electrode in each sub-pixel on the base is overlapped with orthographic projections of a first electrode, a first data line and a second data line.

An article for a display device having an output surface. The article includes a light valve, a reflective polarizer, and a diffusing layer. The light valve is configured to be disposed on the output surface of the display device. The light valve is operable in a pass mode and a block mode. The reflective polarizer is disposed on the light valve opposite to the display device. The reflective polarizer is configured to substantially transmit light having a first polarization state and substantially reflect light having an orthogonal second polarization state. The diffusing layer is disposed on the reflective polarizer opposite to the light valve.

A display unit of the present invention includes a display section (10) that outputs a first linearly-polarized light as image light, and a display switching section (20) that performs switching between an image display mode and an external light reflection mode. The display section (10) includes a first absorption-type polarization member (11) that allows the first linearly-polarized light to pass through and absorbs second linearly-polarized light. The display switching section (20) includes a reflection-type polarization member (21), a switchable transmission polarization axis member (22), and a second absorption-type polarization member (23). The reflection-type polarization member (21) allows the first linearly-polarized light to pass through and reflects the second linearly-polarized light. The switchable transmission polarization axis member (22) performs switching between a first mode in which the first linearly-polarized light is converted into the second linearly-polarized light and a second mode in which the first linearly-polarized light is not converted into the second linearly-polarized light. The second absorption-type polarization member (23) allows the first linearly-polarized light to pass through and absorbs the second linearly-polarized light. The second absorption-type polarization member (23) has a hue b* value that is equal to or smaller than a hue b* value of the first absorption-type polarization member (11).

A device is provided. The device includes a reflective polarizer configured to selectively reflect or transmit a polarized light based on a polarization of the polarized light. The device also includes a display element disposed at a first side of the reflective polarizer, and configured to output a first image light representing a virtual image. The device also includes a polarization switch disposed between the display element and the reflective polarizer, and configured to switch or maintain a polarization of the first image light. The device further includes an active dimming device disposed at a second side of the reflective polarizer, and configured to provide an adjustable transmittance of an input light.

A reflectance-adjustable reflector including a phase modulation element and a first polarizer is provided. The phase modulation element includes a first substrate, a second substrate opposite to the first substrate, a phase modulation layer located between the first substrate and the second substrate, a first electrode layer located between the first substrate and the phase modulation layer, and a second electrode layer located between the second substrate and the phase modulation layer. Thicknesses of the first substrate and the second substrate are between 0.01 mm and 0.5 mm. The first polarizer is disposed on the first substrate. The first substrate is located between the first polarizer and the first electrode layer. A total thickness of the phase modulation element and the first polarizer is less than 1 mm. A reflectance-adjustable display device is also provided.

A laminate is capable of forming an orientation film formed by orienting a rod-like liquid crystal compound or a disk-like liquid crystal compound having a horizontal orientation ability or a vertical orientation ability with respect to a surface of the laminate, on the surface, by using an orientation restraining force of the surface, the laminate including: a cholesteric liquid crystal layer. An optical film sequentially includes: a support; a cholesteric liquid crystal layer; and an orientation film.

Disclosed is a device including at least one emitting element and a polariser, each emitting element being configured to emit a first radiation having a first range of wavelengths, the polariser being configured to be traversed at least partially by the first radiation, each emitting element including an emitter and a converter the emitter being configured to emit a second radiation having a second range of wavelengths, the second range being distinct from the range, the converter being configured to at least partially absorb the second radiation and to emit the radiation in response, each converter being interposed between the corresponding radiation emitter and the polariser. Each converter is configured so that the first radiation is rectilinearly polarised along a polarisation direction.