Projection type display device and projection display method
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United States of America Patent
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Aug 4, 2020
Grant Date -
Jan 25, 2018
app pub date -
Sep 18, 2017
filing date -
Mar 19, 2015
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Abstract
A projection type display device includes: a first light source that emits visible light; a projection receiving member which is disposed on a windshield of a vehicle, to which an image based on the visible light is projected; a second light source that emits ultraviolet light which decreases a light transmittance of the projection receiving member by irradiation of the projection receiving member; a projection unit that projects the visible light emitted from the first light source and the ultraviolet light emitted from the second light source to the projection receiving member; an imaging unit that performs imaging of a scene at front of the windshield of the vehicle; and a detection unit that detects an object image having brightness greater than or equal to a first threshold as defined herein, and the projection unit projects the ultraviolet light as defined herein.
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