Substrate for illumination device with heat dissipation wiring

Abstract

A substrate for an illumination device to be mounted on a steering wheel, includes: a substrate main body; a light emitting element provided on a surface of the substrate main body; and a heat dissipation wiring including a material having a higher thermal conductivity than a thermal conductivity of the substrate main body, the heat dissipation wiring being provided in an installation portion that is at least one of: inside of the substrate main body; or an outer surface of the substrate main body, and the heat dissipation wiring being configured to dissipate heat generated from the light emitting element.

Dependencies are inferred from the claim text.