Patent ID: 6166370
Filing Date: 2000-12-26
Classification: G06F,G06K,G07C

Abstract:
An apparatus for generating a control signal for controlling movement of a first object, the control signal corresponding to movement of a second object in contact with a first surface, the apparatus also being for generating image data representative of the second object, the apparatus comprising:a platen comprising the first surface;a source of electromagnetic radiation for emitting electromagnetic radiation through the platen which is diffused by the second object;a lens for transmitting a portion of the electromagnetic radiation;a detector for receiving the portion of the electromagnetic radiation and generating charge in response thereto; andconversion circuitry for converting the charge generated in the detector to the control signal in a first mode of operation, the conversion circuitry also being for generating the image data from the charge generated in the detector in a second mode of operation, the control signal representing a speed and a direction of movement of the first object in the first mode of operation.