Provided are a decorative film including a reflective layer which consists of a dielectric multi-layer film and develops a color due to an optical interference or a structural color, in which the dielectric multi-layer film has a plurality of regions having different reflection performances in an in-plane direction, at least one of the plurality of regions is a region having a specular reflectivity, and at least another one of the plurality of regions is a region having a diffuse reflectivity; and a molded product and an electronic device using the decorative film.

A tunable liquid crystal (LC) device includes an LC layer between a pair of reflectors forming an optical cavity. The reflectors include conductive layers for applying an electrical signal to the LC layer. One of the conductive layers may include an array of conductive pixels for spatially selective control of the effective refractive index of the LC layer. The phase delay introduced by the LC layer may be greatly increased or magnified by placing the LC layer into the optical cavity. This enables a substantial reduction of the LC layer thickness, which in its turn enables very tight pitches of the LC pixels, with a reduced inter-pixel crosstalk caused by fringing electric fields, as well as faster switching times. A tight-pitch, fast LC device may be used as a configurable hologram or a spatial light modulator.

A display panel and a display apparatus are provided. The display panel includes a first substrate and a second substrate which are arranged oppositely. A liquid crystal layer is filled between the first substrate and the second substrate, the liquid crystal layer has dielectric anisotropy of parameter in a range from −1 F/m to 1 F/m, a sum of a bending flexural coefficient and a splaying flexoelectric coefficient of the liquid crystal layer is greater than 1 pc/m, and liquid crystal molecules in the liquid crystal layer are deflected by a flexoelectric effect, so that deflecting speed of the liquid crystal molecules in the liquid crystal layer is improved and the response time of the liquid crystal layer is shortened.

A tunable liquid crystal (LC) device includes an LC layer between a pair of reflectors forming an optical cavity. The reflectors include conductive layers for applying an electrical signal to the LC layer. One of the conductive layers may include an array of conductive pixels for spatially selective control of the effective refractive index of the LC layer. The phase delay introduced by the LC layer may be greatly increased or magnified by placing the LC layer into the optical cavity. This enables a substantial reduction of the LC layer thickness, which in its turn enables very tight pitches of the LC pixels, with a reduced inter-pixel crosstalk caused by fringing electric fields, as well as faster switching times. A tight-pitch, fast LC device may be used as a configurable hologram or a spatial light modulator.

A reflective-type liquid crystal display device includes: a first substrate including a light-reflective first electrode; a second substrate including a light-transmissive second electrode; a liquid crystal layer that is provided between the first electrode and the second electrode and takes a generally vertical alignment during black display; a polarizing layer provided on a viewer side of the second substrate; and a first retardation layer, a second retardation layer and a third retardation layer that are arranged in this order from a side of the polarizing layer, wherein 40°≤|θ3−2×θ2+2×θ1|≤50°, 130°≤|θ3−2×θ2+2×θ1|≤140°, 220°≤|θ3−2×θ2+2×θ1|≤230° or 310°≤|θ3−2×θ2+2×θ1|≤320° is satisfied, where θ1 denotes an angle formed between an absorption axis or a transmission axis of the polarizing layer and a slow axis of the first retardation layer, θ2 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of second retardation layer, and θ3 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of the third retardation layer.

A phase modulation device of the present disclosure includes: a light source; and an optical phase modulation element including a plurality of pixels in each of which liquid crystal molecules are arrayed, and including a plurality of pixel regions each including the plurality of pixels, the optical phase modulation element modulating, for each of the pixels, a phase of incident light entering the plurality of pixel regions from the light source. The optical phase modulation element includes, as the plurality of pixel regions, at least one first alignment region where an alignment direction of the liquid crystal molecules is a first direction parallel with a polarization axis of the incident light, and at least one second alignment region where an alignment direction of the liquid crystal molecules is a second direction parallel with the polarization axis of the incident light and different from the first direction by 180 degrees.

The present disclosure provides a display panel and a method for preparing same, and a display device. The preparation method includes steps of: providing a base plate, wherein the base plate includes a display area and a binding area, and a magnetic composite structure is disposed in the base plate; disposing a magnetic probe at a position on a side of the base plate that corresponds to the binding area; and adding droplets to an upper surface of the base plate, and controlling the magnetic probe to be turned on, so as to form an alignment film having a uniform thickness on the upper surface of the base plate.

A reflective-type liquid crystal display device includes: a first substrate including a light-reflective first electrode; a second substrate including a light-transmissive second electrode; a liquid crystal layer that is provided between the first electrode and the second electrode and takes a generally vertical alignment during black display; a polarizing layer provided on a viewer side of the second substrate; and a first retardation layer, a second retardation layer and a third retardation layer that are arranged in this order from a side of the polarizing layer, wherein 40|322+21|50, 130|322+21|140, 220|322+21|230 or 310|322+21|320 is satisfied, where 1 denotes an angle formed between an absorption axis or a transmission axis of the polarizing layer and a slow axis of the first retardation layer, 2 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of second retardation layer, and 3 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of the third retardation layer.

A device having variable scattering by liquid crystals includes a stack with a first electrode, an electroactive layer with liquid crystals being stabilized by the polymeric network, and a second electrode. The material exhibits, from a temperature referred to as T1, a mesophase referred to as P. At a temperature T greater than or equal to T1, the stack is capable of exhibiting at least three stable and reversible scattering states in the visible range and a variable color.

A display panel and a display apparatus are provided. The display panel includes a first substrate and a second substrate which are arranged oppositely. A liquid crystal layer is filled between the first substrate and the second substrate, the liquid crystal layer has dielectric anisotropy of parameter in a range from 1 F/m to 1 F/m, a sum of a bending flexural coefficient and a splaying flexoelectric coefficient of the liquid crystal layer is greater than 1 pc/m, and liquid crystal molecules in the liquid crystal layer are deflected by a flexoelectric effect, so that deflecting speed of the liquid crystal molecules in the liquid crystal layer is improved and the response time of the liquid crystal layer is shortened.