Illuminating device

A display device comprising:

• a display panel including a curved surface,
• a lightguide plate including a curved emitting surface, and an incidence surface comprising a side edge curved along the emitting surface;
• a printed circuit board facing the incidence surface;
• and
• a plurality of light sources which are mounted on the printed circuit board and emit light to the incidence surface, wherein
• each of the light sources comprises a light-emitting center, a pair of connection terminals connected to the printed circuit board, and a central axis extending through the connection terminals and the light-emitting center, and
• the light sources are arranged along a curved mounting line extending along the curved side edge of the incidence surface on the printed circuit board, such that the light-emitting centers are located on the mounting line, and such that the central axes are parallel to each other and are located in a direction intersecting with the mounting line.