Input device for a data processing system is based on a stereo optical sensor system for detection of movement of an object, such as a fingernail, with said movement then used for command input, cursor control, etc.

摘要

Input device for a data processing system comprises: a first optical sensor (SER) for imaging an object outside the sensor; a second optical sensor (SEL) at a fixed distance from the first sensor that generates a second image of the object; and an evaluation unit that determines the object position by comparison of the two images and generates a command signal for a data processing system based on the calculated spatial position. The invention also relates to a corresponding data processing system for use with an inventive input device and a method for controlling the data processing system using the inventive input device. Typically the input device can detect movement of a hand or a specific part thereof, such as a finger nail, which is smaller and has a different reflectivity coefficient to the rest of the hand.