Patent ID: 7674004

Claim:
The planar light source device, comprising, a plurality of approximately U-shaped light emitters, each of the approximately U-shaped light emitters including two straight portions stretching lengthwise from an edge toward a center of an emission plane of an approximately flat enclosure and a curved portion integrating the two straight portions therewith around the center of the enclosure, each of the straight portions including an end, close to the edge, provided with an input-output electrode, wherein the approximately U-shaped light emitters are arranged parallel widthwise, symmetrically-placed with respect to a lengthwise centerline, and each of the approximately U-shaped light emitters is inclined such that a distance between the emission plane and an edge of the straight portions around the curved portion is made shorter than a distance between the emission plane and the straight portions around edges of the enclosure, wherein the approximately U-shaped light emitters are inclined such that a distance between the two straight portions and emission plane is made shorter around the curved portions than around the input-output electrodes, wherein the approximately U-shaped light emitters positioned inside widthwise are applied a greater inclined angle than the approximately U-shaped light emitters positioned outside widthwise.