Patent ID: 9465157
Filing Date: 2016-10-11
CPC Classification: G02B

Claim Text:
1. A spread illuminating apparatus comprising: a light source that emits white light, and a light guide plate including an incident light surface which is an end surface at which the light source is disposed and an emitting part that emits light which has entered from the incident light surface in a spread pattern from an emitting surface which is one principal surface, wherein the light guide plate includes an incident light wedge part between the incident light surface and the emitting part, the incident light wedge part including an inclined surface and tapering in thickness from the incident light surface side toward a forward direction, a blue light reflecting unit is disposed on a surface of a circuit board on which the light source is mounted, the surface of the circuit board facing the light guide plate, the blue light reflecting unit is placed near a boundary between the incident light wedge part and the emitting part so as to span across the boundary, the blue light reflecting unit includes a portion disposed to be inclined in an inclination direction of the inclined surface, the circuit board is disposed on a pedestal, the pedestal being provided on the inclined surface side of the incident light wedge parts, and the pedestal being configured so as to not be disposed in a portion in front of the light source and a gap is provided between the inclined surface of the light guide plate and the circuit board.