Naked Eye 3D Laser Display Device

A naked eye 3D laser display device, comprising:

• a directional projection screen, provided on its light-emitting surface with a plurality of nano-grating structures constituting a plurality of nano-grating pixel arrays, wherein each of the plurality of nano-grating structures has a different period and orientation angle;
• a laser light source, configured to provide multi-perspective image pixels which match the plurality of nano-grating pixel arrays on the directional projection screen;
• and
• three red/green/blue monochromatic laser light sources, which emit incident light on a corresponding target nano-grating from different angles, wherein the red, green and blue light from the target nano-grating are converged by the directional projection screen to one emitting direction and one spatial viewpoint, and a convergent viewpoint is formed by imaging of perspective images;
• wherein the nano-grating pixel arrays in different groups have different horizontal convergent viewpoint positions, and the directional projection screen, the laser light source, the three red/green/blue monochromatic laser light sources operate in combination through direct spatial modulation to realize a stereoscopic image display.