Light diffusion member, method for producing same, and display device

A light diffusion member comprising:

• a light transmissive substrate;
• a plurality of light shielding layers which are scatterlingly formed on one surface of the substrate;
• and
• a light diffusion section formed in a region other than formation regions of the light shielding layers on the one surface of the substrate,
• wherein the light diffusion section has a light emitting end surface on the substrate side and a light incident end surface having an area greater than an area of the light emitting end surface on a side opposite to the substrate side,
• wherein a height from the light incident end surface to the light emitting end surface of the light diffusion section is greater than the thickness of the light shielding layers, and
• wherein light scattering bodies are disposed further on a light emitting side than the light diffusion section.

A method for producing a light diffusion member comprising:

• forming a light shielding layer having opening portions on one surface of a light transmissive substrate in at least a portion of which light scattering bodies are formed;
• forming a transmissive negative type photosensitive resin layer on the one surface of the substrate so as to cover the light shielding layer;
• exposing the negative type photosensitive resin layer through the opening portions of the light shielding layer, from a surface opposite to the one surface of the substrate on which the light shielding layer and the negative type photosensitive resin layer are formed;
• and
• forming on the one surface of the substrate, a plurality of light diffusion sections having a light emitting end surface on the substrate side and a light incident end surface having an area greater than an area of the light emitting end surface on a side opposite to the substrate side, by developing the negative type photosensitive resin layer in which the exposing is finished.