Patent ID: 7795572

Claim:
An optical pointing device comprising: an image sensor including a photocell array including a plurality of photocells for sensing light and generating an analog signal corresponding to the light, the image sensor sequentially outputting analog signals from the plurality of photocells in response to a first control signal and a second control signal; a comparator for comparing the signals output from the image sensor to generate a relative comparative signal, and comparing at least one signal output from the image sensor with a comparative signal to generate an absolute comparative signal; and a controller for outputting motion data using the relative comparative signal, outputting a shutter control signal using the absolute comparative signal and outputting the first control signal and the second control signal, wherein the controller comprises: a motion data output unit for receiving the relative comparative signal, and calculating and outputting motion data; and a shutter control signal controller for receiving the absolute comparative signal, calculating an average value of the signal, and outputting a shutter control signal.