Patent ID: 6595652
Filing Date: 2003-07-22
Classification: G02B,Y10S

Abstract:
A surface lighting device comprising:a light guiding plate having a light incident surface formed at one end surface of said light guiding plate and a light exit surface formed on a front surface of said light guiding plate; an elongated light source which faces said light incident surface; a light source reflector which reflects light emitted from said elongated light source toward said light incident surface; a prism sheet, wherein an array of minute parallel prism projections is formed on a surface of said prism sheet, said prism sheet being positioned so that said array of minute parallel prism projections faces said light exit surface; a regular reflection type reflector positioned to face a rear surface of said light guiding plate; a light guiding device for guiding light emitted from said elongated light source to each of two portions of said light incident surface which respectively face opposite ends of said elongated light source; and a diffuser, formed on said light incident surface, which diffuses incident light thereon.