HEAD-UP DISPLAY DEVICE

摘要

A head-up display device includes a projector, an expansion optical system, an estimating part, a determination part, and a light amount control part. The projector has a light source and a liquid crystal panel. The expansion optical system expands an imagery output from the projector. The estimating part estimates a relative position of the sun with respect to a mobile unit. The determination part determines whether the liquid crystal panel is protected based on a relation between the relative position estimated by the estimating part and a solid angle representing a range in which a light from the sun is incident to the liquid crystal panel through the expansion optical system. The light amount control part decreases an amount of light incident to the liquid crystal panel when the determination part determines that the liquid crystal panel should be protected.

主权项

1. A head-up display device that displays a virtual image of an imagery to be recognized by an occupant by projecting the imagery to a projection component in a mobile unit, the head-up display device comprising:
a projector having a light source that emits a light and a liquid crystal panel on which the imagery is formed, the projector projecting the imagery by making the light emitted from the light source to be incident on the liquid crystal panel; an expansion optical system that expands and projects the imagery output from the projector on the projection component; an estimating part that estimates a relative position of the sun relative to the mobile unit based on a position of the mobile unit and a position of the sun; a determination part that determines whether the liquid crystal panel is to be protected based on a relation between the relative position of the sun estimated by the estimating part and a solid angle which represents a range in which a light of the sun is incident to the liquid crystal panel through the expansion optical system; and a light amount control part that decreases an amount of light incident to the liquid crystal panel when the determination part determines that the liquid crystal panel is to be protected compared with a case where the determination part determines that the liquid crystal panel is not to be protected.