IMAGE PROJECTION DEVICE AND CONTROL METHOD FOR IMAGE PROJECTION DEVICE
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United States of America Patent
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Issued Date -
Feb 1, 2024
app pub date -
Jul 12, 2023
filing date -
Jul 28, 2022
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Abstract
An image projection device includes: a light source; an optical scanning element; an optical member that projects the light in a circumferential direction; a sensor that detects the deflection angle and the rotation angle at a specific time point or consecutive time points in a specific period; and a processor, in which the processor determines a target scanning trajectory of a movable mirror, which is necessary for projecting a target image, and a target light emission timing in the target scanning trajectory, drives the optical scanning element based on the target scanning trajectory, calculates a trajectory of the movable mirror based on a detection value of the sensor, determines a light emission timing based on the target light emission timing and the trajectory of the movable mirror, and causes the light source to emit the light based on the determined light emission timing.
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