Light source module

The invention provides a light source module. The module comprises a circuit substrate, a plurality of light emitting units and a wavelength conversion layer. The circuit substrate has a recessed portion. The light-emitting unit is arranged in the concave part. The wavelength conversion layer covers the light-emitting units and is filled in the sunken part, so that the thickness of the light source module can be reduced under the condition of maintaining a certain light mixing distance. 本发明提供一种光源模块，包括电路基板、多个发光单元以及波长转换层。电路基板具有凹陷部。发光单元设置于凹陷部内。波长转换层覆盖于这些发光单元，且填充于凹陷部，如此，能够在维持一定混光距离的条件下，缩减光源模块的厚度。