Self-isolated lasers are provided by using a chiral metasurface in combination with a spin-selective gain medium and symmetry-breaking (i.e., not linearly polarized) optical pumping. In preferred embodiments the chiral metasurface is resonant, thereby proving an integrated optical resonator to support lasing. The chiral metasurface can be the spin-selective gain medium, or it can be formed on a surface of the spin-selective gain medium, or it can be distinct from the spin-selective gain medium.

A liquid crystal display device and a display method are provided. The liquid crystal display device includes a light guide plate including a plurality of light extraction areas arranged along a first direction, and a liquid crystal display component arranged in a light exiting direction of the light guide plate; in a thickness direction of the liquid crystal display component, each of the plurality of pixel areas includes a first electrode layer, a second electrode layer, a liquid crystal layer, and a light filter layer arranged on a side of the liquid crystal layer that is away from the light guide plate; the light filter layer includes a plurality of first light shielding strips arranged along the first direction; each of the plurality of first light shielding strips extends along a second direction substantially perpendicular to the first direction.

A display substrate includes: a plurality of sub-pixel regions at a first base substrate, each of the plurality of sub-pixel regions including a light-blocking region and aperture regions located at opposing sides of the light-blocking region; and a first transparent electrode and a second transparent electrode within each of the plurality of sub-pixel regions, configured to drive a liquid crystal layer; wherein the first transparent electrode includes a first electrode unit located inside the light-blocking region and including a plurality of first sub-electrodes, wherein each of the plurality of first sub-electrodes are separated from two adjacent first sub-electrodes by a separation distance; and wherein the separation distance between two adjacent first sub-electrodes nearest to a center line of the light-blocking region is smaller than the separation distance between two adjacent first sub-electrodes nearest to an edge of the light-blocking region.

The present disclosure provides a gray scale setting method, a display substrate and a display apparatus, and relates to the field of display technology. The gray scale setting method of the present disclosure applied to a display substrate. The display substrate has a display area and a non-display area. The display substrate includes an edge pixel on a boundary between the display area and the non-display area, and the edge pixel includes a first sub-area pixel within the display area and a second sub-area pixel within the non-display area. The method includes: acquiring an area ratio of the first sub-area relative to the edge pixel; determining a relative transmittance of the edge pixel according to the area ratio of the first sub-area relative to the edge pixel; and determining a display gray scale for the edge pixel according to the determined relative transmittance.

A display device according to an embodiment of the present inventive concept includes: a substrate including a first region and a second region; and a plurality of pixels disposed on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode in a pixel disposed in the first region, and the first capacitance between the first data line and the pixel electrode is larger than the second capacitance between the second data line and a pixel electrode in the pixel disposed in the second region.

A light collimation structure includes a light guide plate (1) and a light extraction unit (2) on the light guide plate (1). The light extraction unit (2) may be configured to take out lights having a filtered first color having a narrow band of spectrum, a filtered second color having a narrow band of spectrum, and a filtered third color having a narrow band of spectrum in the light guide plate (1) to provide a collimated first color light, a collimated second color light and a collimated third color light.

A method for testing crosstalk of a screen. The method includes when a main screen and a secondary screen simultaneously display pictures of different grayscales, determining a standard parameter value of crosstalk for each of the secondary screen and the main screen caused by the other; determining an actual parameter value of crosstalk for each of the secondary screen and the main screen caused by the other; calculating a degree of crosstalk for each of the secondary screen and the main screen caused by the other, according to the standard parameter value of crosstalk and actual parameter value of crosstalk for each of the secondary screen and the main screen caused by the other, respectively.

The present disclosure relates to a display panel. The display panel includes: a light guide member, a light extraction member and a modulation member sequentially arranged along a first direction; and wherein the light extraction member is configured to extract light propagating within the light guide member in a collimated manner to one side of the light extraction member away from the light guide member, and the modulation member is configured to modulate a reflectance and transmittance of the light extracted in a collimated manner by the light extraction member within the modulation member.

A display device and a display method for the display device are provided by the present disclosure. The display device includes an edge-lit backlight source, a black-and-white display panel and a display panel stacked in sequence. The display panel includes a plurality of display units, each display unit includes at least one pixel unit, the black-and-white display panel includes at least one pixel, and each pixel corresponds to the display unit in one-to-one correspondence, an orthographic projection of each pixel onto the display panel coincides with the corresponding display unit.

The present invention provides a liquid crystal display panel and an alignment method of the liquid crystal display panel. By inputting a voltage equal to a pixel voltage into data black-matrix less (DBS) electrodes at a gray scale 255, rotation of liquid crystals at the DBS electrodes can be consistent with rotation of liquid crystals at the pixel electrodes during an alignment process. Therefore, the present invention improves brightness at the DBS electrodes of the liquid crystal display panel at the gray scale 255, and increases light transmittance of the liquid crystal display panel.