| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface light source device having a plurality of light-emitting elements producing different colors of emitted light applied as a light source in which color unevenness can be restricted without using any wave-length conversion substance.SOLUTION: A surface light source device comprises a plurality of light-emitting devices arranged under a prescribed arrangement in regard to a first direction and a second direction and a light diffusion plate. Each of the plurality of light-emitting devices comprises a plurality of light-emitting elements having different colors of emitted light to each other and a light flux control member for controlling an arrangement of light emitted from the plurality of light-emitting elements. The light flux control member includes an incident plane, a total internal reflection plane for reflecting a part of the incidence light at the incidence plane in a third direction opposite to the first direction, and two light guide parts for guiding a part of the incidence light at the incidence plane to either the first direction or the third direction. An arrangement order of a plurality of light-emitting elements at a certain light-emitting device is different from the arrangement order of a plurality of light-emitting elements at another adjoining light-emitting device in the first direction or the second direction.SELECTED DRAWING: Figure 5 |
