Patent ID: 8251562
Filing Date: 2012-08-28
Classification: G02B

Abstract:
1. A unitary light guide plate, comprising: a rectangular flat light exit plane; a thick portion located substantially on a center portion of the light exit plane in parallel with one side of the light exit plane; thin end portions formed on both sides of the thick portion in parallel with the thick portion; a half portion of a parallel groove formed of at least one of the thin end portions and on a backside of the light exit plane to accommodate linearly arranged light sources; inclined back portions arranged on both sides of the thick portion so as to become thinner from the thick portion to the thin end portions in a direction orthogonal to the one side; and scattering means for scattering light entering from the light sources accommodated in the parallel groove into the thin end portions and propagated through the inclined back portions toward the thick portion.