Patent ID: 7995160

Claim:
A prism sheet comprising: a base including a front surface and a rear surface facing the front surface; and a plurality of prism mountains integrally formed with the base on the rear surface of the base, wherein at least one of the plurality of prism mountains comprises: a plurality of light incidence surfaces to receive light; and a reflective surface adjacent to one of the plurality of light incidence surfaces to reflect the light, and wherein the at least one prism mountain comprises first and second light incidence surfaces, an angle formed between the first light incidence surface and a straight line passing through an angular point of each prism mountain perpendicularly to the front surface is θ x1 , an angle formed between the second light incidence surface and the straight line passing through the angular point of each prism mountain perpendicularly to the front surface is θ x2 , and the θ x1 is in a range of about 36° to about 70°, and the θ x2 is in a range of about 5° to about 10°.