Light source module

A light source module, comprising:

• a substrate;
• a first covering layer disposed on a bottom surface of the substrate, wherein a first current flows through the first covering layer;
• a second covering layer located under the first covering layer, wherein a second current flows through the second covering layer;
• a luminous layer arranged between the first covering layer and the second covering layer, wherein the luminous layer emits a light beam in response to the first current and the second current, and the light beam is projected to surroundings through the substrate;
• and
• a supporting base electrically connected with the first covering layer and the second covering layer, and comprising a circuit board, a first metal connection layer, a second metal connection layer and a passivation layer, wherein the first metal connection layer is disposed on a top surface of the circuit board, the second metal connection layer is disposed on the first metal connection layer, the second metal connection layer and the first metal connection layer are combined together to reflect the light beam, and the passivation layer is disposed on the second metal connection layer to protect the circuit board, the first metal connection layer and the second metal connection layer, wherein when a portion of the light beam projected to the supporting base is reflected by the passivation layer, the portion of the light beam is projected to the surroundings through the substrate.