A light source module, the light source device and a liquid crystal display device

A light source module includes a light emitting diode (12R,12B,12G) and a wiring board (13). The light emitting diode (LED) chip group (12) includes LED chips for red, green and blue colors. A plurality of the LED chip groups are mounted on the wiring board. A surface on one side of the wiring board is a device forming surface (13A) including the plurality of the LED chip groups, an external connecting terminal (15) for leading out electrodes, and a wiring pattern (14) for electrical connection between the LED chip groups and the external connecting terminal. A surface on the oter side of the wiring board is a heat radiating surface (13B) which is thermally connected to the device forming surface and operative to radiate heat generated at the device forming surface to the exterior.