Projection device and automatic projection calibration method thereof

摘要

A projection device and an automatic projection calibration method thereof are disclosed. When the projection device boots up, an image pattern corresponding to a display data is projected through a projecting unit. The image pattern is sensed through an image sensor to obtain information of the image pattern. The information of the image pattern is compared with information of a previous image pattern through a processing unit to determine whether to execute an automatic calibration procedure. When the processing unit executes the automatic calibration procedure, a calibration pattern is projected through the projecting unit. The calibration pattern is sensed through the image sensor to obtain information of the calibration pattern. A calibration driving procedure is executed through the processing unit to convert imaging coordinates of the calibration pattern sensed through the image sensor into projecting coordinates of the projection device, so as to establish a coordinate conversion table.

主权项

1. A projection device, comprising:
a projecting unit, receiving a projection control signal and a display data, and projecting a calibration pattern or an image pattern according to the projection control signal, wherein the image pattern is corresponding to the display data; an image sensor, sensing the image pattern; a processing unit, coupled to the projecting unit and the image sensor, and providing the projection control signal, wherein when the projection device boots up, the processing unit controls the projecting unit to project the image pattern through the projection control signal and senses the image pattern through the image sensor, so as to obtain an information of the image pattern, the processing unit compares the information of the image pattern with an information of a previous image pattern to determine whether to execute an automatic calibration procedure, when the processing unit executes the automatic calibration procedure, the processing unit controls the projecting unit to project the calibration pattern through the projection control signal and senses the calibration pattern through the image sensor, so as to obtain an information of the calibration pattern, and the processing unit converts imaging coordinates of the calibration pattern sensed by the image sensor into projecting coordinates of the projection device through executing a calibration driving procedure, so as to establish a coordinate conversion table; and a storage unit, storing the information of the previous image pattern, the calibration driving procedure, and the coordinate conversion table.