BigPatents India

A wireless control device (10) includes a small, lightweight housing (22) worn by an operator (20), for example on the operator's wrist, and a controlled device (24), for example a personal computer. Several optical emitters (32), preferably light emitting diodes operating in the infrared range, and several optical detectors (36) are provided on the housing. At least one x-axis emitter-detector pair operates to detect an x-direction of a pointing motion or gesture, and at least one y-axis emitter-detector pair operates to detect a y-direction of a pointing motion or gesture. This motion can then be used to cause a response in the controlled device (24). For example, angles of the operator's hand at the wrist can be interpreted to induce motion of a cursor on a computer display. The device may also include a motion sensor (40), an environmental condition sensor (42), or a voice recognition sensor (43), and can also be adapted for gesture recognition and image scanning applications. (FIG. - 1)