Provided are a display panel, a preparation method thereof, and a display apparatus. The display panel includes a first substrate and a second substrate disposed oppositely, and a liquid crystal layer sandwiched between the first substrate and the second substrate, wherein the first substrate includes a black matrix layer and a color filter layer which are sequentially disposed on a first base substrate; at least one of the first substrate and the second substrate further includes a spacer; and the black matrix layer includes at least one first black matrix, and an orthographic projection of each first black matrix on the first base substrate covers an orthographic projection of the spacer on the first base substrate.

The invention relates to a reflecting cell including at least two substrates covered by an electrode and facing each other, the substrates delimiting between them a volume which separates them and which is filled with a cholesteric liquid crystal-type material, both electrodes being intended to be connected to a voltage source. This cell includes at least one half-wave plate arranged between both substrates and dividing the volume into two compartments, each enclosing a part of a same cholesteric liquid crystal.

A display device comprising a color filter layer and a light-emitting unit is provided. The color filter layer includes a first subpixel area, a second subpixel area and a third subpixel area. The first subpixel area includes a first quantum dot material, and the second subpixel area includes a second quantum dot material. The light-emitting unit provides light to the color filter layer. A wide color gamut and a polarization effect are achieved via the quantum dot materials and the polarization material. Furthermore, due to no additional loss of the light at the light-emitting unit (backlight module), the luminous efficiency is high.

The present invention provides an optical film including a light reflection layer, in which the light reflection layer is a layer in which alignment of liquid crystal molecules is immobilized, the liquid crystal molecule forms a helical structure in a film thickness direction of the light reflection layer, and a tilt angle of the liquid crystal molecule is 15° to 55°. The present invention also provides a manufacturing method of the optical film including curing a polymerizable liquid crystal composition including a liquid crystal compound and a chiral agent interposed between a support and another support. In the optical film according to the present invention, an absolute value of oblique retardation is smaller. In the liquid crystal display device including the optical film, front surface brightness is high and an oblique change in the shade is suppressed.

According to one embodiment, a liquid crystal display device includes an optical member including a polarizer having an absorption axis and a transmission axis, a liquid crystal display panel including a light-reflecting layer and a liquid crystal layer located between the light-reflecting layer and the optical member, and a lighting unit located on a side opposite to the optical member with respect to the liquid crystal display panel to release linearly polarized light transmitted through the polarizer toward the polarizer side.

A display device includes a first substrate and a second substrate opposing each other, a reflecting layer, which reflects light incident on the reflecting layer, on the first substrate, a polarizing layer which is disposed on the second substrate and includes a polarizing portion that polarizes light incident on the polarizing portion and a reflecting portion that reflects light incident on the reflecting portion, a liquid crystal layer between the reflecting layer and the polarizing layer, and a retardation layer between the liquid crystal layer and the polarizing layer.

A system includes a spatial light modulator comprising a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The spatial light modulator is characterized by a first retardation and a first phase retardation and has a first slow axis for light propagation. A voltage source is configured to apply a drive voltage to the spatial light modulator and the first retardation of the spatial light modulator is a function of the drive voltage. A retarder is positioned external to the spatial light modulator and is characterized by a second retardation and a second phase retardation. The retarder includes a second slow axis for light propagation. The second retardation has a value such that all illumination wavelengths in a set of illumination wavelengths are above or below a phase retardation value of 0.25. The set of illumination wavelengths includes at least one illumination wavelength in each of at least three different color spectrums.

A polarized device includes a first polarizer, a second polarizer, and a compensation film between the first polarizer and the second polarizer. An absorption axis of the first polarizer is vertical to the absorption axis of the second polarizer, and a slow axis of the compensation film is vertical to the absorption axis of the first polarizer or the absorption axis of the second polarizer. In addition, a display device incorporated with the polarized device is disclosed. The polarized device and the display device may greatly eliminate the optical leakage when the polarizers are not orthogonal to each other such that the display performance may be enhanced.

Liquid crystal modulator optical devices and more specifically shutters and smart windows are presented. The liquid crystal modulator devices are characterized by a reduced polymer content which is eliminated from the material composition of the liquid crystal layer and characterized by non-uniform electrode structures in the liquid crystal structure configured to generate spatially non-uniform electric fields and therefore non-uniform molecular reorientation of liquid crystal molecules. This arrangement advantageously makes light scattering electrically controllable.

A polarization insensitive optical phase modulator is provided including a glass substrate; a liquid crystal element; a first electrode on a first surface of the liquid crystal element adjacent the glass substrate; a second electrode on a second surface of the liquid crystal element, opposite the first surface, the first and second electrodes supplying an electric potential across the liquid crystal element to drive liquid crystals in a predetermined configuration; and a silicon backplane on the second electrode opposite the liquid crystal element. The first electrode is a transparent electrode to a selected wavelength and is on a surface of the glass substrate. The second electrode includes individually addressable pixels and reflection metal mirrors on pixel surfaces and is on a surface of the silicon backplane. The modulator further includes a polymer quarter-wave plate (QWP) between the second electrode and the liquid crystal element, the polymer QWP having an optical axis at 45 degrees to liquid crystal slow axis.