PROJECTOR AND PROJECTOR CONTROL METHOD Russian patent published in 2016 - IPC H04N9/31 

FIELD: physics.

SUBSTANCE: projector includes a projection unit, which includes a projection optical system and is configured to project an image on a screen SC, a lens drive unit configured to adjust the focus for the projection optical system, a trapezium distortion correction unit configured to perform distortion correction processing for correcting the distortion of the image projected by the projection unit, and a projection control unit configured to cause the trapezium distortion correction unit to perform distortion correction processing until a condition is met for the completion of distortion correction processing after meeting the condition for the beginning of distortion correction processing, and limit focus adjustment by the lens drive unit, while the projection control unit causes the trapezium distortion correction unit to perform distortion correction processing.

EFFECT: shorter time spent on correcting the distortion of an image projected on a projection surface.

7 cl, 9 dwg