Patent · US Active

Image sensor

US9024243B2 · kind B2 · utility

2Cited by
1References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 16, 2012
Grant dateMay 5, 2015
Priority date
Expiry dateMay 10, 2032

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N25/772
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

An image sensor includes a plurality of self-resetting pixels including: a mechanism converting detected electromagnetic energy into a proportional electric current; an integrating capacitor including a mechanism for fast charging to a first electric level and for controlled discharging to a second electric level; a mechanism for comparing the controlled discharge; a loopback mechanism, allowing automatic repetition of fast charging and controlled discharging cycles and counting of number of cycles occurring during a determined integration time; a mechanism measuring a residual electric charge present in the integrating capacitor on completion of the integration period; and a calibration mechanism using the measurement mechanism to measure and compensate for operating and production dispersions specific to each pixel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.