Light source module having airflow channels in a heat dissipation element

1. 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.

2. The light source module as claimed in claim 1 , wherein the heat dissipation medium comprises a heat dissipation pad, a graphite sheet, a layer of conductive paste, a layer of heat dissipation adhesive or a layer of lead-free solder paste.

3. The light source module as claimed in claim 1 , wherein an end of each of the conductive contact portions connects the conductive connection portion and the end is far away from the bottom surface.

4. The light source module as claimed in claim 1 , wherein the conductive contact portions are an integrally formed unit.

5. The light source module as claimed in claim 1 , wherein the conductive contact portions and the conductive connection portion are an integrally formed unit.

6. The light source module as claimed in claim 1 , wherein the extending directions of the conductive contact portions are substantially perpendicular to the bottom surface.

7. The light source module as claimed in claim 1 , 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 alternately disposed one after another.

8. The light source module as claimed in claim 1 , wherein the light box comprises:

a first transparent substrate, having the light emitting surface;

a second transparent substrate, facing the first transparent substrate and having the bottom surface;

a frame, disposed between the first transparent substrate and the second transparent substrate;

a plurality of spacers, disposed between the first transparent substrate and the second transparent substrate, wherein a plurality of chambers are formed between the first transparent substrate, the second transparent substrate, the frame, and the spacers; and

a discharge gas, filling the chambers.

9. The light source module as claimed in claim 8 , wherein the first transparent substrate comprises a glass substrate.

10. The light source module as claimed in claim 8 , wherein the second transparent substrate comprises a glass substrate.

11. The light source module as claimed in claim 8 , wherein the discharge gas comprises an inert gas.

12. The light source module as claimed in claim 11 , wherein the inert gas comprises xenon gas, neon gas or argon gas.