Display device

A display device, comprising:

• a diffusion plate, wherein the diffusion plate comprises:
• a substrate comprising a first surface and a second surface facing away from each other;
• and
• a micro-structure unit located on a side of the second surface of the substrate, wherein the micro-structure unit comprises a third surface and a fourth surface facing away from each other, the third surface is connected to the second surface, and the fourth surface has a surface shape axis inclined relative to the first surface;
• and
• a light source located on a side of the first surface of the substrate, wherein the light source is configured to emit a light beam to be diffused to the micro-structure unit, the light beam to be diffused has a chief ray inclined relative to the first surface and emitted from the light source at an original direction, and the light beam to be diffused passes through the micro-structure unit to form a diffused light field, wherein the chief ray is located at a center of the light beam to be diffused and maintains the original direction after passing through the micro-structure unit, and a center of the diffused light field is located on the chief ray;
• and
• wherein an inclined direction of the surface shape axis relative to the first surface is opposite to an inclined direction of the first surface relative to the chief ray, so that the light beam to be diffused passes through the micro-structure unit to form the diffused light field with the center of the diffused light field located on the chief ray,
• wherein the diffusion plate comprises a plurality of micro-structure units, and inclined surface shape axes of all micro-structure units on the second surface of the substrate have a given direction opposite to the inclined direction of the first surface relative to the chief ray.