Patent ID: 8210714

Claim:
An illuminant module, comprising: an optical film comprising a micro lens array comprising plurality of continuously curved concave surfaces and a plurality of continuously curved convex surfaces alternatively discontinuously conjunctionally arranged along at least a first direction and a second direction perpendicular to the first direction, wherein each of the concave surfaces has a concave surface width along the first direction, and each of the convex surfaces has a convex surface width along the first direction; and a light source array comprising a plurality of light emitting diodes, wherein the concave surface width is not equal to the convex surface width, and the light from the light source array penetrates the optical film; wherein the micro lens array is arranged on the opposite side of the optical film as the light source array; wherein the concave surfaces and the convex surfaces are alternatively and conjunctionally arranged along the first direction, the second direction, and a third direction between the first and the second direction, wherein a profile of a cross-section of the micro lens array along the first direction is the same as a profile of a cross-section of the micro lens along the second direction.