Light source device, display, and electronic unit

A display comprising:

• a display section;
• and
• a light source device including a light guide plate, one or more first light sources, and a second light source, the light guide plate having a first face and a second face which face each other and having one or more side faces, the first light sources being disposed to face the respective side faces of the light guide plate, the second light source being disposed to face a surface, of the light guide plate, corresponding to the second face, the second light source being controlled to stay in a light-off state when the display section is in a 3D mode, and controlled to stay in a light-on state when the display section is in a 2D mode,
• wherein one or both of the first and second faces each have a plurality of scattering regions, the scattering regions being configured to vary in form according to a distance from a side face of the light guide plate.

A light source device comprising:

• a light guide plate having a first internal reflection face and a second internal reflection face which face each other, and having one or more side faces;
• and
• one or more first light sources disposed to face the respective side faces of the light guide plate and to apply first illumination light through the side faces of the light guide plate into the light guide plate,
• wherein one or both of the first and second internal reflection faces each have a plurality of scattering regions, the scattering regions being configured to vary in form according to a distance from a side face of the light guide plate and allowing the first illumination light from the first light source to be scattered and to exit from the first internal reflection face to outside of the light guide plate.

An electronic unit including a display, the display comprising:

• a display section performing an image display;
• and
• a light source device including a light guide plate and one or more first light sources, and emitting light for the image display toward the display section, the light guide plate having a first internal reflection face and a second internal reflection face which face each other and having one or more side faces, and the first light sources being disposed to face the respective side faces of the light guide plate, and to apply first illumination light through the side face of the light guide plate into the light guide plate,
• wherein one or both of the first and second internal reflection faces each have a plurality of scattering regions, the scattering regions being configured to vary in form according to a distance from a side face of the light guide plate and allowing the first illumination light from the first light source to be scattered and to exit from the first internal reflection face to outside of the light guide plate.