According to one embodiment, an illumination device includes a wiring substrate, light emitting elements, a projection, and a protective layer. The main surface of the wiring substrate is divided into segment regions. Each of the segment regions is provided with n of the light emitting elements. N is greater than 1. The light emitting elements are independently driven in units of the segment regions. The protective layer is configured to protect the light emitting elements. The upper surface of the protective layer is located on the main surface side from the highest part of the projection.