Solar energy utilization device

A solar energy utilization device, comprising:

• a light energy utilization unit having a first light energy utilization part which is basically flat and a second light energy utilization part arranged back to back with the first light energy utilization part, wherein the first and second light energy utilization parts are capable of receiving, converting and utilizing sunlight;
• two convex light concentrating units, each being a solid lens or an accommodating cavity filled with a transparent liquid, wherein each of the two convex light concentrating units having a tilt light-transmissive convex sidewall capable of transmitting the sunlight to the solid lens or the transparent liquid and having a basically flat bottom, the first light energy utilization part fits the bottom of one of the two convex light concentrating units, the second light energy utilization part fits the bottom of the other convex light concentrating unit, the sunlight in any of the two convex light concentrating units transmitted from the solid lens or the transparent liquid to the light-transmissive convex sidewall forms a total reflection phenomenon such that the sunlight is concentrated onto the respective light energy utilization part;
• further comprising a reflecting part and a support structure, wherein the two convex light concentrating units and the light energy utilization unit are supported by the support structure, the reflecting part is arranged below the two convex light concentrating units and the light energy utilization unit to allow the sunlight to be reflected to any of the two convex light concentrating units.