Patent ID: 8177378

Claim:
A light emitting apparatus comprising: a plurality of light sources for emitting a light; and a light guide plate having a substantially plate shape orthogonal to the optical axis direction of the light source, which includes a light incident face into which a light exited from the light source is incident and a light exit face from which the light incident from the light incident face is exited, wherein irregularities each made of a first slope forming an angle θa with the plane of the light incident face and a second slope forming an angle θb with the plane of the light incident face are continuously formed on the light incident face, the angle θa is an angle for fully reflecting lights refracted at the first slope and incident into the light guide plate among the lights exited from the light source on the light exit face even when the position of the light source is offset to be distant from the light guide plate, and the angle θb is an angle for preventing the light exited from the light source from being directly refracted at the second slope and incident into the light guide plate even when the position of the light source is offset to be distant from the light guide plate.