Patent ID: 8792087
Filing Date: 2014-07-29
Classification: G01S,H01L

Abstract:
1. A pixel structure for optical distance measurement, comprising: a semiconductor substrate; a photoactive region integrated on the substrate and arranged to charge carriers responsive to radiation incident on the photoactive region; a reference potential terminal for a reference potential acting as a charge carrier sink; a plurality of at least three evaluating capacities in the form of floating-diffusion regions which are arranged around the photoactive region so as to be laterally spaced apart from an edge of the photoactive region; a plurality of at least four transfer gates in the form of MOS capacitors configured to transport the charge carriers generated from the photoactive region, wherein at least three of the plurality of transfer gates are configured to transport the charge carriers generated from the photoactive region to a respective evaluating capacity; and a control circuit configured to cyclically drive, in each cycle: