| 摘要 |
A virtual data input device to optically interface with an operator to detect the position of objects within an input zone, i.e., an area defined as a "virtual keyboard" in which the operator may interact to enter character or other data into computing equipment. The input device includes a source of optical sensor light illuminating the input zone that reflects off the objects in a direction generally toward the input device. The device also includes an optical detector arranged to receive reflected sensor light as a light pattern, representing the position of the objects within the input zone, and converts the reflected light pattern to an electrical signal. A microprocessor then receives the electrical signal and correlates the electrical signal to character or other data. An image generator may be used to project an optical image that represents, for example, an image of a keyboard.
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