Image projection apparatus and compensation method
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United States of America Patent
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Nov 6, 2018
Grant Date -
Jun 21, 2018
app pub date -
Dec 1, 2017
filing date -
Dec 21, 2016
priority date (Note) -
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Abstract
An image projection apparatus includes a light emission unit for emitting laser light; a light scanning unit for projecting an image on a drawing area by reflecting the light and scanning the reflected light; a light detection unit arranged outside of the drawing area; a detection unit for detecting, according to a deviation from a desired value of a first pixel detected by the light detection unit when the light is horizontally scanned in a first direction and a deviation from a desired value of a second pixel detected by the light detection unit when the light is horizontally scanned in a second direction, each of a phase deviation of the laser light in a horizontal scanning direction and a swing angle fluctuation of the light scanning unit; and a compensation unit configured to compensate for each of the phase deviation and the swing angle fluctuation.
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