| 摘要 |
<p>A projector assembly and projection method for determining and correcting keystone distortion, which includes an image correction engine (18), a light engine (20), projection lens (22), having a projection axis, a processor (24), a directional sensor (26) and an inclination sensor (28). The processor calculcates the vertical and horizontal directions and the vertical and horizontal zero references- The inclination sensor determines the vertical zero reference; while the horizontal zero reference can either input by the user or mreasured using an external direction device adapted to be positioned against the projection surface (see figure 8 part 19). The vertical and horizontal difference angles are used by the processor (24) to calculate the keystone distortion and the processor (24) instructs the image correction engine (18) to apply geometric and brightness correction to the image data so that the projected image is free from keystone distortion.</p> |
