Light-emitting diode lighting structure for improving back-illumination efficiency

The invention presents a light-emitting diode lighting structure for improving back-illumination efficiency, which is placed on a substrate and comprises a light emitting diode having an encapsulated lens and forming a light exit side and a back side, and a reflector mirror, positioned at the light exit side and near the encapsulated lens. In this way, the reflector mirror can reflect part of the illumination light from the light side onto the substrate. By the implementation of the invention, the illumination on the substrate can be enhanced. When a plurality of light-emitting diode lighting structures are arranged for use on traffic signs, the traffic signs can effectively produce much more continuous illumination to achieve the best visual comfort and legibility.