Display device and image forming apparatus

A display device comprising:

• a light guide member having a first incidence surface, and an emission surface orthogonal to the first incidence surface;
• a light source substrate having a light source that emits light toward the first incidence surface of the light guide member, and a substrate on which the light source is arranged;
• and
• a liquid crystal panel having a second incidence surface arranged to be inclined relative to a surface of the substrate in a position where the liquid crystal panel faces the emission surface of the light guide member,
• wherein the light guide member has convex light diffusion portions arranged on the emission surface, and has a constant thickness in an optical axis direction of the light source,
• the light diffusion portions of the light guide member are spaced from the liquid crystal panel, and
• a second angle between the emission surface of the light guide member and the surface of the substrate is greater than 0°, and is equal to or smaller than a first angle between the second incidence surface of the liquid crystal panel and the surface of the substrate.