Patent ID: 8624173

Claim:
A sensing pixel structure for generating a sense image with uniform resolution, the sensing pixel structure being used in an optical sensor, and placed corresponding to an optical lens, the sensing pixel structure comprising: a plurality of first sense pixels located in a central region of the optical sensor corresponding to a central region of the optical lens, each first sense pixel of the plurality of first sense pixels having a first pixel area; and a plurality of second sense pixels located in a peripheral region of the optical sensor, relative to the central region of the optical sensor, and corresponding to a peripheral region of the optical lens, each second sense pixel of the plurality of second sense pixels having a second pixel area; wherein the first pixel area is greater than the second pixel area for the peripheral region of the optical lens to correspond to more sense pixels than the central region of the optical lens for the optical sensor to generate a sense image with uniform resolution; wherein a central region of the sense image corresponds to the central region of the optical sensor, a peripheral region of the sense image corresponds to the peripheral region of the optical sensor, and a relationship between contrast and spatial frequency of the central region of the sense image is approximately the same as a relationship between contrast and spatial frequency of the peripheral region of the sense image.