Internal reflection element micro

LGPs with optical micro-reflectors (MRs) are shown in Fig. 5.2 [1, 4-6]. An MR element has a shape of a micro-lens or microprism with optical surface. The MR elements are structured on the back surface of an LGP [7-16]. Each MR element reflects light based on the total internal reflection (TIR). To provide a uniform extracted luminance on the BLU, an array of MR elements are fabricated on a mold with an optical surface. The pattern of the mold is transferred onto an LGP in an injection molding. The MR element is often a concave or convex lenslet with round, square, elliptical, or diamond geometrical shape [ 1,8]. An MR element reflects... 

In a MD-LGP a light ray repeats total internal reflections before hitting a single MD element. When a ray is incident on the inner surface of a MD element, the ray is deflected (on refraction) and directed on the MD element. To form the emergent light cone and control its direction the geometrical shape of the micro-deflector element should be designed and adopted to the MR element. 

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