Patent ID: 8132954
Filing Date: 2012-03-13
Classification: G02B

Abstract:
1. A planar lighting device comprising: a light guide plate including: a pair of main light sources disposed opposite said pair of first light entrance planes of said light guide plate, respectively, and emitting light to said pair of first light entrance planes, respectively; a pair of auxiliary light sources disposed opposite said pair of second light entrance planes of said light guide plate, respectively, and emitting light to said pair of second light entrance planes; and light intensity distribution control means for adjusting amount of light emitted respectively by said main light sources and said auxiliary light sources to form a designated local light intensity distribution for any position in said light exit plane of said light guide plate, wherein said main light sources and said auxiliary light sources each comprising light sources and a base on which said light sources are arrayed in a longitudinal direction of said pair of first light entrance planes and said pair of second light entrance planes, respectively.