Patent ID: 8764269

Claim:
A light source module comprising: a light guide plate comprising: a first surface; a second surface opposite to the first surface; two opposite light incident surfaces connecting the first surface to the second surface; and a plurality of micro-structure sets separately disposed on the second surface, wherein the micro-structure sets are not continuous in any direction parallel to the first surface, and each of the micro-structure sets comprises: at least one protrusive structure protruding from the second surface and the at least one protrusive structure comprising: a first micro-surface; a second micro-surface connecting the first micro-surface, an inclined direction of the first micro-surface being different from an inclined direction of the second micro-surface; a fifth micro-surface, the fifth micro-surface and the first micro-surface being connected to form a first ring-shaped surface; and a sixth micro-surface connected to the fifth micro-surface, an inclined direction of the fifth micro-surface being different from an inclined direction of the sixth micro-surface, the sixth micro-surface and the second micro-surface being connected to form a second ring-shaped surface; and at least one recessive structure recessed in the second surface and the at least one recessive structure comprising: a third micro-surface; a fourth micro-surface connecting the third micro-surface, an inclined direction of the third micro-surface being different from an inclined direction of the fourth micro-surface; a seventh micro-surface, the seventh micro-surface and the third micro-surface being connected to form a third ring-shaped surface; and an eighth micro-surface connected to the seventh micro-surface, an inclined direction of the seventh micro-surface being different from an inclined direction of the eighth micro-surface, the eighth micro-surface and the fourth micro-surface being connected to form a fourth ring-shaped surface; two light emitting devices disposed beside the two light incident surfaces respectively; and a control unit electrically connected to the light emitting devices, so as to drive the light emitting devices to emit light alternately.