| 摘要 |
An input device for a computer having a graphical user interface, having a display device that is connected to the computer and that is designed to reproduce contents generated by the computer in a display area and is connected to the computer, a camera device that covers at least one part of the display area and can be connected to the computer and that comprises at least one beam directed by a transmitter device designed to emit a directed electromagnetic beam into the display area and generates a signal that is characteristic of the position at which the beam strikes a surface in the display area and/or of the path and the direction which/in which a beam traverses that strikes a surface in the display area, and wherein the characteristic signal for controlling the execution of a computer program in the computer makes it possible for one or more users to act on the events imaged on the display (screen) surface of the computer regardless of the size of the display area and his spatial distance from it or to be able to trigger instructions.
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