Patent ID: 8242668

Claim:
A light source module, comprising: a planar light source, comprising: a light box, having a light emitting surface and a bottom surface opposite to the light emitting surface; a plurality of electrodes, disposed on the bottom surface, a driving voltage applied between the electrodes leading to ionize and excite a discharge gas so as to produce plasma and emit visual light; and an insulation layer, disposed on the bottom surface and covering the electrodes; a non-metallic heat dissipation medium, disposed on the insulation layer; and a heat dissipation element, comprising: a plurality of conductive contact portions, contacting the heat dissipation medium, wherein the orthographic projections of the conductive contact portions on the bottom surface and the orthographic projections of the electrodes on the bottom surface are not overlapped by each other to avoid generating an inductive electric field due to pressing the electrodes by the conductive contact portions; and a conductive connection portion, connecting the conductive contact portions, wherein a plurality of airflow channels are formed between the conductive contact portions, the conductive connection portion, and the non-metallic heat dissipation medium.