Patent ID: 6485157
Filing Date: 2002-11-26
Classification: G02B,Y10S

Abstract:
A light guide plate comprising:two major faces to provide an emission face and a back face; and an incidence end face for introducing light, wherein said back face is provided with a great number of projection-like micro-reflectors for direction-conversion of light, each of which includes a guiding portion and a conversion output portion that includes a ridge portion and a pair of first and second reflection surfaces formed on both sides of the ridge portion respectively as to be inclined with respect to a general plane representative of said back face, said ridge portion and said first and second reflection surfaces forming a valley in the micro-reflector, said valley getting narrower and shallower as being distant from the guiding portion so that an inner input light reaching the valley via the guiding portion is reflected by one of the first and second reflection surfaces and is further reflected by the other of the first and second reflection surfaces as to produce an inner output light directed to said emission face, said emission face being provided with a great number of projection rows running approximately at right angles with respect to said incidence end face, said projection rows have an inner reflection function which controls a direct escaping of the inner out put from said emission face.