Abstract: A projecting system for projecting an image onto a screen includes a projector and an image-capturing device. The projector includes a light source, a beam splitter for splitting a beam generated by the light source into a visible beam and an invisible beam, a first image-forming device for modulating the invisible beam to form a first image, a second image-forming device for modulating the visible beam to form a second image, and a prism for projecting the first image and the second image onto the screen. The image-capturing device includes an output unit for outputting a first part of the first image at a first time and a second part of the first image at a second time, and a data processor for receiving data from the output unit and changing the position of the cursor according to the first and the second part of the first image.

Abstract: A projecting system for projecting an image onto a screen includes a projector and an image-capturing device. The projector includes a light source, a beam splitter for splitting a beam generated by the light source into a visible beam and an invisible beam, a first image-forming device for modulating the invisible beam to form a first image, a second image-forming device for modulating the visible beam to form a second image, and a prism for projecting the first image and the second image onto the screen. The image-capturing device includes an output unit for outputting a first part of the first image at a first time and a second part of the first image at a second time, and a data processor for receiving data from the output unit and changing the position of the cursor according to the first and the second part of the first image.

Abstract: An image-displaying device for displaying images has a housing, an universal serial bus port installed in the housing for electrically connecting to an electronic device through an universal serial bus in order to receive serial data, a data converter installed in the housing and electrically connected to the universal serial bus port for converting the serial data to image data, an image processor installed in the housing and electrically connected to the data converter for converting the image data to display data, and an image generator installed in the housing and electrically connected to the image processor for displaying an image on a display according to the display data.