Light source device

A light source device comprising:

• a substrate having an upper surface including a plurality of mounting areas;
• a plurality of light-emitting elements disposed on the upper surface of the substrate such that at least one of the plurality of light-emitting elements is disposed in each of the mounting areas;
• at least one light-shielding member disposed on an upper surface of at least one of the plurality of light-emitting elements;
• and
• a light guide member having an upper surface and a lower surface, the light guide member defining, in the lower surface, a plurality of first recesses and at least one second recess,
• wherein the at least one of the plurality of light-emitting elements in each mounting areas is configured to be turned on and off discretely with respect to the at least one of the plurality of light-emitting elements in other mounting areas,
• wherein each of the light-emitting elements is disposed on the mounting area in a corresponding one of the first recesses,
• wherein the second recess comprises annular portions each surrounding a corresponding one of the first recesses in a top view, and
• wherein light emitted from the light-emitting elements in the first recesses enters the light guide member through first inner surfaces defining the first recesses, is reflected at second inner surfaces defining the second recess toward the upper surface of the light guide member, is emitted from the upper surface of the light guide member, and illuminates illumination areas located at positions that are point-symmetrical, with respect to a point above the substrate, to the mounting areas on which the light-emitting elements are disposed.