Patent ID: 6678021
Filing Date: 2004-01-13
Classification: G02B

Abstract:
A light guide plate comprising:two major faces to provide an emission face and a back face; and a side end face for introducing light, wherein said back face is provided with a great number of micro-reflectors for light-direction-conversion, each of said micro-reflectors being a projection shaped like a tableland projecting from a general plane on which said back face generally extends, each of said micro-reflectors providing a flat bottom face and a valley adjacent to said bottom face, said bottom face extending approximately in parallel with said general plane on which said back face generally extends, said valley including first and second slopes and being formed as to tend to get narrower and shallower with an increasing distance from said bottom face, thereby causing an inner input light reaching said valley to be inner-reflected by one of said first and second slopes and then inner-reflected by the other, and causing an inner output light directed to said emission face to be produced.