Array substrate, display device and spatial positioning method of display device

A spatial positioning method of a display device, wherein an array substrate of the display device comprises a base substrate, at least one sensing pixel arranged at a side of the base substrate and in a pixel layer, and a light source structure having the same light exit direction as the pixel layer, the method comprises steps of:

• acquiring relevant data information of collimation invisible light emitted by the light source structure and reflected light, which is received by the at least one sensing pixel, of the collimation invisible light reflected by an object to be positioned;
• and
• calculating a distance from the object to be positioned to the display device according to the acquired data information,
• wherein the pixel layer comprises a plurality of sensing pixels arranged in an array between a plurality of sub-pixels, the light source structure comprises a plurality of light sources arranged in an array and corresponding to the sensing pixels one to one, and a collimating optical layer disposed at a light exit side of the light sources, and the method further comprises:
• modulating the invisible light emitted by each of the light sources such that frequencies of the invisible light emitted by the respective light sources of the light source structure in a first direction are different from each other,
• wherein the acquired relevant data information of the reflected light received by the sensing pixel comprises optoelectronic information obtained by demodulating the received reflected light by the sensing pixel.