Surface light source device
AssigneePanasonic Corporation
InventorToshiki Onishi
Life of this patent
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Abstract
A surface light source device from which large planar light with a uniform light intensity distribution can be obtained from spot-like laser light. The surface light source device (100) comprises a laser light source (110) for emitting the laser light, an optical system including one or more reflective diffusion members (120), and an optical waveguide (130) combined with the optical system for converting the reflected and diffused laser light into the planar light and emitting from a principal plane. The reflective diffusion member (120) converts the laser light emitted from the laser light source (110) into linear light having an arcuate radiation pattern.
Claims20
A planar light source apparatus comprising:
- a laser light source that emits a laser light;
- an optical system that comprises at least one or more reflection-type diffusing members that make the light undergo reflected diffusion;
- a light guiding plate that is combined with the optical system to convert the reflected and diffused laser light to emit from a main surface,
- wherein the at least one reflection-type diffusing member converts the laser light emitted from the laser light source into linear lights having an arcuate radiation pattern.
Dependencies are inferred from the claim text.