Patent ID: 8919993

Claim:
A light source device comprising: a first light source having a light emitting surface which emits lights and/or scatters lights into a range of directions including small-angle lights and large-angle lights, the small-angle lights having smaller angles with respect to a normal direction of the light emitting surface than the large-angle lights; a light recycling system, including two reflectors each disposed on one side of the first light source, for directing the small-angle lights back to the first light source; and a light collection system for collecting and outputting the large-angle lights, which includes one or more reflectors, or one or more prisms, or a combination of one or more reflectors and one or more prisms, disposed around the first light source to receive the large-angle lights from the first light source, wherein the light recycling system and the light collection system are separate from each other.