Head-up display device

Abstract

Provided is a head-up display device that enables display with more accurate quality. A head-up display device of the present disclosure comprises: a light source that emits light at a predetermined brightness and that emits illumination light; a display element that generates display light by being illuminated with the illumination light; a light sensor that, when illumination light is incident thereon, outputs an illumination light amount signal corresponding to the illumination light amount; and a light source controller that controls the light emission of the light source in response to the illumination light amount signal. The light source controller controls the light source, on the basis of deterioration information indicating the degree of deterioration due to aging of the light sensor, in a first mode in which light is emitted at a first brightness in a case where the deterioration of the light sensor is small, and in a second mode in which light is emitted at a second brightness lesser than the first brightness in a case where the deterioration of the light sensor is large.