摘要:
To provide a linear light source device (1) arranged on a lateral surface of a light guide plate, comprising: a plurality of linear light source assemblies (3) each including an elongated substrate and a plurality of light emitting elements linearly mounted on one of main surfaces of the sub substrate; and a main substrate (2) having mounted thereon the linear light source assemblies (3). With this structure, even if the linear light source device (1) is elongated, luminance unevenness is hardly caused in planar light emitting devices and liquid crystal display devices.