Display panel and display device are provided. The display panel includes a first substrate, a second substrate, and a plurality of pixel units. Each pixel unit includes a heating element, a reflective layer, a resonant cavity, and a phase-change material layer sequentially disposed on the first substrate, and a liquid crystal cell. The display panel also includes first signal lines extending along a row direction, second signal lines extending along the column direction, and a driving circuit in correspondence to each pixel unit. The driving circuit includes a first driving module and a second driving module that are connected to a same first signal line and a same second signal line. The first driving module drives the heating element to control the state of the phase-change material layer, and the second driving module controls the deflection of liquid crystal molecules in the liquid crystal cell.

Provided is an electrochromic display device including a pair of supporting substrates facing each other, a pair of electrodes each disposed on the supporting substrate and facing each other, an electrochromic display layer disposed in contact with at least one of the pair of the electrodes, and an electrolyte layer disposed between the pair of the electrode, wherein the electrochromic display layer includes a plurality of electrochromic layers exhibiting mutually different coloring colors, and the plurality of the electrochromic layers are laminated on the electrode at least in a partial area of the electrode.

A transparent display device includes a first transparent electrode layer, a second transparent electrode layer disposed opposite to the first transparent electrode layer, and a liquid crystal mixture layer disposed between the first transparent electrode layer and the second transparent electrode layer, wherein the liquid crystal mixture layer includes liquid crystal molecules and quantum rods.

An electro-optic display comprising at least two separate layers of electro-optic material, with one of these layers being capable of displaying at least one optical state which cannot be displayed by the other layer. The display is driven by a single set of electrodes between which both layers are sandwiched, the two layers being controllable at least partially independently of one another. Another form of the invention uses three different types of particles within a single electrophoretic layer, with the three types of particles being arranged to shutter independently of one another.

An optical device comprising a stack of the following layers: a capping layer; a layer of light absorber material; and a reflective layer, wherein the refractive index of the capping layer is at least 1.6.

A display device and a display method thereof are provided. The display device includes: a first base substrate (10) and a second base substrate (20) which are arranged oppositely and a liquid crystal layer (30) between the first base substrate (10) and the second base substrate (20), the display device further includes: a waveguide grating (40) between the liquid crystal layer (30) and the first base substrate (10), the waveguide grating (40) including a waveguide layer (401) and a grating layer (402) on one side of the waveguide layer (401) facing the liquid crystal layer (30), and the grating layer (402) being in contact with the liquid crystal layer (30); and a collimation light source (50) on a lateral surface of the waveguide layer (401), light emitted by the collimation light source (50) being coupled into the waveguide layer (401) and output from the grating layer (402). The display device can regulate an amount of the light output from the waveguide grating by controlling changes of the refractive index of the liquid crystal layer so as to implement gray scale display.

A display panel and a display device are provided. The display panel includes: a lower substrate and an upper substrate cell-assembled together; a light-emitting control layer disposed between the lower substrate and the upper substrate; and a plurality of pixel units defined by a plurality of data lines and gate lines intersected with each other. Each pixel unit includes a plurality of subpixel areas. One or more side surfaces of the lower substrate are configured to receive incidence of the collimated light. The light-emitting control layer is configured to control the light-emitting directions and the light-emitting colors of the subpixel areas, to allow the light-emitting directions of the subpixel areas toward the central portion of the display panel. The light-emitting control layer is also configured to control the display grayscale of the subpixel areas.

Color derived from metallic nanostructures are often more efficient, more robust to environmental changes, and near impossible to damage or bleach due to overexposure. The embodiments combine these advantages with the millisecond re-configurability of liquid crystals to actively control a reflective color of a metallic nanostructure. Of the current technologies that boast active color tunability, many are pigmentation based (e-ink in e-readers) and/or need seconds to change color (photonic ink, electrochromic materials). Speed is an advantage of the embodiments and is comparable to current liquid crystal displays (˜120 Hz). Traditional LC displays use static polymer films (color filters) and white back light to generate color. Being able to actively tune the color from a single metallic nanostructure allows for smaller pixel size, increased resolution, and decreased fabrication cost compared to a conventional RGB color pixel without needing external white light source for extremely low power operations.

The present disclosure relates to a display panel, a display device, a reflective filter and a control method thereof. The reflective filter includes: a substrate; a first dielectric layer having a first refractive index, and located on one side of the substrate; a periodic array structure located on one side of the first dielectric layer away from the substrate and in direct contact with the first dielectric layer, wherein the periodic array structure includes a plurality of solid material patterns spaced apart by gaps; and a second dielectric layer covering the periodic array structure and filling the gaps, wherein a material of the second dielectric layer is a variable refractive index material; wherein the first refractive index of the first dielectric layer is lower than an equivalent refractive index n.sub.neff of the periodic array structure with the gaps filled with the variable refractive index material.

A display component includes a transflective layer, a reflective layer, and at least one sidewall. The reflective layer is arranged opposing to the transflective layer, and the at least one sidewall is arranged between the reflective layer and the transflective layer. The transflective layer, the reflective layer, and the at least one sidewall are together configured, upon an input of an incident light through the transflective layer, to output a light of a target color out through the transflective layer. One or more of the at least one sidewall comprise at least one light-conversion layer configured to emit a light of the target color upon excitement by a light of a different color shedding thereupon. The display component can be configured to output a red light, a green light, or a blue light.