Patent ID: 8049400

Claim:
A surface light source apparatus with dual-side emitting light, comprising: a first transparent substrate; a second transparent substrate; a spacer, disposed between the first transparent substrate and the second transparent substrate to construct a space; a low-pressure gas layer, filling the space and functioning to induce cathode for evenly emitting electrons; a cathode structure, disposed with direct contact on the first transparent substrate; an anode structure, disposed with direct contact on the first transparent substrate; and a fluorescent structure layer, disposed with direct contact on the first transparent substrate and located between the cathode structure and the anode structure, wherein the anode structure and the cathode structure have no overlap when perpendicularly looking to the first transparent substrate, and an electron mean free path of the low-pressure gas layer allows at least sufficient electrons to transversely move and directly impact the fluorescent structure layer under an operation voltage.