Apparatus for controlling the position of a display pointer for an electronic device, method and optical pointing device for generating motion data for controlling the position of a screen pointer

摘要

An apparatus (10) for controlling the position of a screen pointer for an electronic device having a display screen, the apparatus comprising: a light source (2) for illuminating an imaging surface (6), thereby producing reflected images; and an optical motion sensor (16) for generating digital images from the reflected images at a first frame rate, the motion sensor configured to generate motion data (161) based on the digital images, the motion data being a relative motion between the imaging surface and the device specify, wherein the motion sensor is configured to modify the first frame rate to one of a plurality of other frame rates based on a current relative speed (163) between the imaging surface and the device, the device comprising a low power mode and a full power mode, the device configured to automatically enter the low power mode after a period of inactivity, and wherein the motion sensor (16) is configured to capture digital images in the low power mode ...