Patent ID: 8502935

Claim:
A liquid crystal display device, comprising: a liquid crystal panel; a backlight which radiates light to the liquid crystal panel; a light emitting element mounted on the backlight; and a light guide plate on which light from the light emitting element is incident, the light guide comprising a light incident portion and a light radiation portion as discrete, independent parts, separately joined together via a joint, the light radiation portion having a thickness smaller than a thickness of the light incident portion, projecting portions which project from a surface of the light incident portion: wherein the light incident portion faces a light emitting surface of the light emitting element in an opposed manner and on which the light from the light emitting element is incident, and the light radiation portion being a portion of the light guide from which the incident light is radiated; a joint surface is formed between the separate independent parts of the light incident portion and the light radiation portion along the joint; the light incident portion and the light radiation portion are joined by the joint surface; the light radiation portion includes grooves being recessed outwardly and a flat surface, the light radiation portion is made from a sheet-shaped resin; the light incident portion is not formed to have a S-shape; and has an inclined surface extending upward from an upper surface of the light radiation portion, lenses are formed on the light incident portion, and the light radiation portion has two substantially parallel surfaces.