Illumination system and manufacturing method thereof

Abstract

An illumination system comprises a main waveguide, a scattering structure, and an extending waveguide. The main waveguide includes an incident face and a surface opposite the incident face, wherein external light passes through the incident face into the main waveguide. The scattering structure is disposed on or close to the surface of the main waveguide so as to scatter the external light transmitted into the main waveguide. The extending waveguide has an illuminating surface and a joint interface between itself and the main waveguide. The joint interface is not shaded by the scattering structure and allows the scattered external light to pass through the illuminating surface to illuminate an illuminated area. According to an embodiment of the present invention, the illumination system is simple and efficiently collecting the external light in a broader incident angle to provide illumination. A method for manufacturing the illumination system is also disclosed.

Dependencies are inferred from the claim text.