A touch display panel includes a substrate, a display layer disposed on the substrate, an insulating layer disposed on the display layer, and a touch electrode layer directly contacting the insulating layer. The display layer comprises a first region, a second region, and a third region. The second region is located between the first region and the third region. The second region is foldable. The insulating layer has a first thickness corresponding to the first region and a second thickness corresponding to the second region. The first thickness is different from the second thickness. The insulating layer comprises a first layer, a second layer, and a third layer, wherein the second layer is disposed between the first layer and the third layer. The first layer and the third layer are formed of inorganic insulating materials, and the second layer is formed of organic insulating material.

A liquid crystal display device comprises a first substrate; a second substrate opposite the first substrate; a liquid crystal layer between the first substrate and the second substrate; and an active area including: a matrix of first regions; and a plurality of second regions distributed so as not to overlap the first regions, wherein each first region includes a switching element and is supplied with a grayscale signal via the switching element, and the plurality of second regions includes no switching element and is supplied with a common signal.

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.

Embodiments of the present disclosure provide a display panel, a driving method thereof and a display device. The display panel includes: a light guide plate, configured to propagate light incident at a set angle by total reflection; an opposite substrate, arranged opposite to the light guide plate; a liquid crystal layer, arranged between the light guide plate and the opposite substrate; and a plurality of light extraction structures. Each light extraction structure includes: a light taking grating arranged on a surface of the light guide plate, a first wire grid structure arranged between the light guide plate and the liquid crystal layer, a second wire grid structure arranged between the liquid crystal layer and the opposite substrate, and a first electrode structure and a second electrode structure arranged between the light guide plate and the opposite substrate. A direction of a light transmitting axis of the first wire grid structure is vertical to a direction of a light transmitting axis of the second wire grid structure. The first electrode structure is of a blocky structure. The second electrode structure includes a plurality of strip-shaped sub-electrodes which are parallel to each other; and an included angle between an extension direction of the sub-electrode and the direction of the light transmitting axis of the first wire grid structure ranges from 10° to 80°.

According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.

A jagged display effect may be ameliorated by processing an edge of the display into an arc shape, thereby improving display quality. Display units in the color filter substrate are in a one-to-one correspondence with pixel units in the display. A plurality of display units corresponding to a corner area of the display include a ribbon area including K display units. A target boundary line that is of the ribbon area and that is away from the center of the color filter substrate is jagged, and K≥2. In the ribbon area, a light transmittance of a first display unit close to the target boundary line is less than a light transmittance of a second display unit away from the target boundary line. The ribbon area comprises Q transition layers disposed along the target boundary line.

A display device with low power consumption is provided. A display device having high visibility regardless of the ambient brightness is provided. The display device includes a light-receiving element, a display element, a first transistor, and a second transistor. One of a source and a drain of the first transistor is electrically connected to one electrode of the light-receiving element. The one of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the second transistor. The display device has a function of, by turning on the second transistor, changing the gray level of the display element in accordance with the amount of light detected by the light-receiving element.

A method for implementing folding M×N wavelength selective switch is provided. A one-dimensional single-mode fiber optic collimator array, a short-focus cylindrical mirror, a first long-focus cylindrical mirror, a retroreflector, a transmission phase diffraction grating, a second long-focus cylindrical mirror, a liquid crystal spatial light modulator, and a liquid crystal graphic loading control system are provided along beam transmission direction. The same set of optical elements is used for incident light and outgoing light by ingenious folding structure. The input port and output port of optical signal are consistent in spatial arrangement, thereby reducing space and improving port utilization. Based on composite liquid crystal chips, a working area of the liquid crystal spatial light modulator is doubled, and a quantity of accommodating ports is greatly increased. A quantity of M×N ports of the WSS can be increased greatly by the above structure and design.

A liquid crystal display device includes a first substrate, and a first pixel which is disposed on the first substrate, and includes a pixel area and a circuit area adjacent to the pixel area where the first pixel further includes a first pixel electrode in which a slit extending in a first direction is defined, a first sub-pixel electrode disposed on one side of the slit, and a second sub-pixel electrode disposed on another side of the slit, the slit, the first sub-pixel electrode and the second sub-pixel electrode are disposed in the pixel area, and the first sub-pixel electrode and the second sub-pixel electrode are directly connected to each other in the circuit area.

A liquid crystal display includes a first substrate, a first subpixel electrode, a connecting electrode, and a second subpixel electrode. The first subpixel electrode is on the first substrate and includes a first stem extending in a first direction and a plurality of branches extending from the first stem. The connecting electrode is electrically connected to the first subpixel electrode. The second subpixel electrode is on the same layer as the first subpixel electrode and includes a plurality of separation electrodes that do not overlap the connecting electrode. At least one of the separation electrodes is between a first sub branch and a second sub branch, which neighbor each other from among the branches. The second subpixel electrode is a floating electrode.