Low-power always-on image sensor and pattern recognizer
US12238413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2020 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Jan 10, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical sensor module has a controller, a sensor array, present state decision circuitry, and a pattern recognizer. The sensor array comprises a plurality of CMOS sensor pixels, wherein the sensor array is configured to supply one of a plurality of analog sensor signals at each of a sequence of sample times, wherein at each of the sample times, the one of the plurality of analog sensor signals is derived from one or more of the plurality of CMOS sensor pixels. The present state decision circuitry is configured to compare the one of the plurality of the analog sensor signals with a respective controller-selected reference voltage and to generate therefrom a respective single state decision signal. The pattern recognizer is configured to assert a pattern recognition signal whenever a plurality of sequentially generated single state decision signals matches a currently active one of a set of one or more reference sequences of single state decision signals. The controller is configured to assert a host system trigger signal when the pattern recognition signal is asserted a predefined number of times in sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.