Patent ID: 6930735

Claim:
A liquid crystal display comprising: a liquid crystal layer; a reflection plate disposed at a back side of said liquid crystal layer; a first polarization plate interposed between said liquid crystal layer and said reflection plate; a second polarization plate disposed at a front side of said liquid crystal layer; and, a surface light source device of side light type for auxiliary lighting which comprises a guide plate and a primary light source to supply primary light to an incidence end face provided by a minor face of the guide plate, said guide plate having major faces to provide a back face and an illumination output face; wherein said illumination output face is provided with no light scattering property; said back face provides a light control face provided with emission promoting property which helps light propagating within the guide plate to be escaped from said illumination output face; said guide plate being interposed between said liquid crystal layer and the first polarization plate so that said back face is directed to said liquid crystal layer.