Diffusion plate and backlight module having same

A backlight module, comprising:

• a diffusion plate, comprising:
• a main body comprising a light incident surface and a light emitting surface opposite to the light incident surface;
• and
• an antireflection film formed on at least one of the light incident surface and the light emitting surface, the antireflection film comprising a plurality of antireflection film layers, a thickness of each antireflection film layer being less than a wavelength of visible light;
• and
• a plurality of light sources located at a light incident side of the diffusion plate.

A backlight module comprising:

• a diffusion plate having a light incident side and a light emitting side opposite from the light incident side;
• a plurality of light sources located on the light incident side of the diffusion plate for illuminating the light incident side of the diffusion plate;
• a prism sheet located on the light emitting side of the diffusion plate for receiving light emitted from the light emitting side of the diffusion plate, and configured for changing emitting angles of the light emitted from the light emitting side of the diffusion plate;
• and
• a diffusion sheet located on a side of the prism sheet away from the diffusion plate, and configured to diffuse light emitted from the prism sheet;
• wherein the diffusion plate includes a main body having a light incident surface and a light emitting surface opposite from the light incident surface, a first antireflection film formed on the light incident surface, and a second light incident film on the light emitting surface;
• wherein each of the first antireflection film and the second antireflection film includes from ten to one-hundred antireflection layers, a thickness of each antireflection layer is less than a wavelength of visible light, refractive indexes of any two adjacent antireflection layers are different, and light diffusing particles are dispersed in the main body.