Patent ID: 6499849
Filing Date: 2002-12-31
Classification: G03B,H04N

Abstract:
A method for adjusting the size of an image of a projector, the projector comprising a screen for displaying the image, an image generator for converting received image signals into the image with a first or second image resolution, a projecting lens set for projecting the image onto the screen, and at least one detector installed at a predetermined position on the screen for sensing the image on the screen; wherein the method comprises:projecting an image with the first image resolution on the screen; generating a resolution-changing signal to change the resolution of the image from the first image resolution to the second image resolution; generating a focus-changing signal to change the focus of the projecting lens set so as to decrease the size of the image with the second image resolution; changing the focus of the projecting lens set according to the focus-changing signal so as to continuously increase the size of the image with the second resolution; and stopping changing the focus of the projecting lens set when the detector senses the edge of the image.