Patent ID: 8749891

Claim:
A directional light distributing optical array, for receiving a plurality of first light beams and a plurality of second light beams emitted by a plurality of light sources, wherein each light source comprises an optic axis, the directional light distributing optical array arranged along a first plane comprising: a plurality of light incident surfaces, wherein each light incident surface comprises a central axis and individually receives the plurality of first light beams and the plurality of second light beams emitted by at least one light source; a plurality of light emission curved surfaces, wherein each light emission curved surface is intersected with the first plane being vertical to the central axes to form a first curve, each first curve has a plurality of first curve segments, each first curve segment comprises at least three first tangent points, and after passing a corresponding first tangent point, each of the plurality of first light beams exits along a first axis, an included angle formed between the first axis and the optic axis is greater than −15° and smaller than 15°, and wherein each first tangent point satisfies a formula in the following: M x = tan ⁢ ⁢ θ = tan ⁡ ( sin - 1 ⁡ ( n 1 n 2 ⁢ sin ⁢ ⁢ A x ) ) wherein M x is a tangent slope at each first tangent point, θ is an included angle formed between the first axis and a normal line of each first tangent point, A x is an included angle formed between a connecting line of each first tangent point and a corresponding light source and a corresponding optic axis, n 1 is a refractive index of the directional light distributing optical array, and n 2 is a refractive index of an ambient environment in which the directional light distributing optical array is disposed; and a plurality of reflective strutures, each formed between the two light incident surfaces which are adjacent to each other, the plurality of reflective structures being used to receive and reflect the plurality of the second light beams from the plurality of light sources to the plurality of light emission curved surfaces, wherein the plurality of light emission curved surfaces receives and reflects the plurality of the second light beams from the plurality of reflective strutures toward the plurality of light incident surfaces.