LOW POWER IMAGE SENSOR ADJUSTING REFERENCE VOLTAGE AUTOMATICALLY AND INTEGRATED CIRCUIT INTEGRATING THE IMAGE SENSOR ON ONE CHIP

摘要

The present invention mainly relates to a low-power image sensor used in an optical mouse or finger mouse, optical pointing devices, ; In detecting the light from the subject to the image sensor outputting an image signal; By sensing the light from the subject and the image sensor unit for converting into an electrical signal, and outputting the electrical signal; To receive electrical signals from the image sensor unit, the comparison unit which outputs the voltage level of the electric signal after a comparison with the reference voltage, the image signal into a one-bit (bit) per pixel signal; It comprises the Comparative and the effective range of a predetermined bit value distribution of the image signal output from the comparison portion to the effective image control section which outputs a valid image by adjusting the reference voltage. ; An image sensor, the reference voltage adjustment, the effective image determination