Patent ID: 8313206

Claim:
A lighting device, comprising: a light source module having a substrate, an electrode layer patterned on the substrate, and a plurality of light sources bonded on the substrate to electrically connect with the electrode layer; a plurality of light spreading plates being disposed onto the light source module, each of the light spreading plates having a light traveling layer formed with a plurality of light spreading units, a light scattering layer coated onto the light traveling layer, and a plurality of through holes, wherein each of through holes is formed at a periphery of one of the light spreading units; a plurality of stick objects being disposed at the substrate and protruding the through holes respectively; and a plurality of hollow caps, each of the hollow caps having a hole to receive one of the stick objects so that the light spreading plates are secured onto the light source module when the stick objects penetrate the through holes to be sheathed with the hollow caps respectively.