Multi-view pixel directional backlight module and naked-eye 3d display device

A multi-view pixel directional backlight module, comprising at least two rectangular light guide plates closely stacked together, wherein

• a light-emerging surface of the rectangular light guide plate is provided with a plurality of pixel arrays, pixels of respective pixel arrays is interleaved with each other in an ordered or unordered manner and is uniformly distributed on the light-emerging surface of the light guide plate, light emitted by pixels in a same pixel array is pointed to a same viewing angle, and different pixel arrays have different viewing angles;
• and
• at least one side of each rectangular light guide plate is provided with a light source group, light emitted by the light source group enters the corresponding light guide plate, then emerges from pixels of respective pixel arrays on the light-emerging surface of the light guide plate, and is totally reflected at positions other than positions of the pixels within the light guide plate, each of the pixels is a nano-diffraction grating.