Lighting device including light guide plate and display device including the lighting device

A lighting device comprising:

• light sources arranged in a row in an arrangement direction;
• a light guide plate disposed to cover the light sources and including a plate surface facing the light sources and an opposite plate surface being opposite from the plate surface, a portion of the plate surface being a light entering surface through which light emitted by the light sources enters, and the opposite plate surface being a light exit surface through which the light exits;
• and
• a light diffusion portion extending in the arrangement direction of the light sources and on the light exit surface such that a portion of the light diffusion portion overlaps the light sources, the light diffusion portion applying a diffusion effect to light that is within the light guide plate so as to travel in a direction crossing the arrangement direction and to be away from the light sources seen from a normal direction of the light exit surface, wherein
• the light guide plate includes a light source housing recessed portion on the plate surface facing the light sources and the light source housing recessed portion extends in the arrangement direction and the light sources are arranged in the light source housing recessed portion,
• the light entering surface is a portion of an inner surface of the light source housing recessed portion,
• a portion of the inner surface of the light source housing recessed portion is in contact with a portion of the light sources such that the light source housing recessed portion positions the light guide plate with respect to the light sources in a crossing direction that crosses the arrangement direction seen from the normal direction of the light exit surface, and
• the light diffusion portion is arranged such that a center of the light diffusion portion is on a same position as a center of the light sources that are in contact with the portion of the inner surface of the light source housing recessed portion with respect to the crossing direction.

A lighting device comprising:

• light sources arranged in a row in an arrangement direction;
• a light guide plate disposed to cover the light sources and including a plate surface facing the light sources and an opposite plate surface being opposite from the plate surface, a portion of the plate surface being a light entering surface through which light emitted by the light sources enters, and the opposite plate surface being a light exit surface through which the light exits;
• a light diffusion portion extending in the arrangement direction of the light sources and on the light exit surface such that a portion of the light diffusion portion overlaps the light sources, the light diffusion portion applying a diffusion effect to light that is within the light guide plate so as to travel in a direction crossing the arrangement direction and to be away from the light sources seen from a normal direction of the light exit surface;
• and
• a first light exit prism portion included on the light exit surface of the light guide plate so as not to overlap the light diffusion portion and including first light exit unit prisms that extend in the arrangement direction and are arranged in a direction crossing the arrangement direction seen from the normal direction of the light exit surface.