Image protection device and adjustment method
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United States of America Patent
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Apr 3, 2018
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N/A
app pub date -
Jan 7, 2015
filing date -
Jan 7, 2014
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Abstract
An image projection device includes: a light source for emitting a light beam; a mirror unit that includes a mirror for reflecting the beam and projects an image onto a surface by rotating the mirror about a rotational axis to scan the beam; and a controller for determining, according to a function representing a relationship between a shift amount, an emitting time of the beam, a position on the surface irradiated by the beam emitted at the emitting time, and a shift angle of the mirror from its position when it is not driven, the emitting time corresponding to a target position. The shift amount is a shift amount of a position of the beam incident on the mirror or a shift amount of a position of the source relative to an optical axis of light incident on the mirror without the shift amount and perpendicularly intersecting the rotational axis.
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