LIGHT SOURCE DEVICE AND ELECTRONIC APPARATUS

A projection image by a laser light can be projected in a wide angular range while an increase in a beam diameter is suppressed. A light source device according to the present disclosure includes: a light source unit (200) that includes a plurality of light emitting elements (210) and is divided into a plurality of regions having at least one light emitting element in one region; and an optical unit that includes a plurality of first lens groups (221) having a first focal length and corresponding to the plurality of regions of the light source unit on a one-to-one basis, each of the plurality of first lens groups (221) including one or more lenses, and a second lens group (230) having a second focal length and emitting light having passed through the plurality of first lens groups, the second lens group (230) including one or more lenses. In the optical unit, for each of the plurality of regions, the first focal length is smaller than zero, the second focal length is larger than zero, and each composite focal length of each of the plurality of first lens groups and the second lens group is larger than the second focal length.