Patent ID: 8414175

Claim:
A light source apparatus, comprising: a light guide plate, having a first surface, a second surface opposite to the first surface, a first side surface, and a second side surface opposite to the first side surface; a first light emitting unit, disposed beside the first side surface, capable of providing a first light beam, wherein the first light beam is capable of entering the light guide plate through the first side surface; and a second light emitting unit, disposed beside the second side surface, capable of providing a second light beam, wherein the second light beam is capable of entering the light guide plate through the second side surface, wherein the first light emitting unit has a central line passing through a geometric center of the first light emitting unit and being perpendicular to the first side surface, the second light emitting unit has a central line passing through a geometric center of the second light emitting unit and being perpendicular to the second side surface, and the central line of the first light emitting unit does not coincide with the central line of the second light emitting unit, wherein a width of the first side surface in a direction parallel to the first surface is defined as A, a width of an overlap between an orthographic projection of the second side surface on the first side surface and the first side surface in the direction parallel to the first surface is defined as D, and D/A is greater than or equal to 65% and smaller than or equal to 90%.