Light sensing module and electronic device using the same

A light sensing module, comprising:

• a substrate;
• a light sensing unit being disposed on the substrate to sense an intensity of a working light beam and having an upper light receiving surface and a lateral surface perpendicular to the upper light receiving surface;
• a first light-transmissive component covering the light sensing unit, wherein the first light-transmissive component has a first refractive index that is between a refractive index of the light sensing unit and a refractive index of air;
• a light shielding layer being disposed on the substrate and surrounding the lateral surface;
• and
• a third light-transmissive component surrounding the first light-transmissive component and having a third refractive index that is less than the first refractive index;
• wherein the upper light receiving surface is exposed from the light shielding layer, the first light-transmissive component covers the upper light receiving surface, and the third light-transmissive component covers the light shielding layer.