Patent ID: 8297764

Claim:
A reflective sheet, comprising: a first reflective layer having a first index of refraction; and a second reflective layer having a second index of refraction, the first reflective layer and the second reflective layer being in contact with each other to form a contact interface, and the first index of refraction being different from the second index of refraction to make the contact interface be a reflective surface; wherein a top surface of the first reflective layer opposite the contact interface serves as a light incident surface for the reflective sheet, the reflectance of the first reflective layer is larger than the reflectance of the second reflective layer, the mechanical strength of the second reflective layer is larger than the mechanical strength of the first reflective layer, the first reflective layer comprises polypropylene and a plurality of reflective particles, the second reflective layer comprises polycarbonate and a plurality of reflective particles, and the reflective particles of the first reflective layer and the reflective particles of the second reflective layer are made of an identical material.