Photodetector having dark current correction
US7649220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2007 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Apr 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/12707
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photodetector and method for making the same is disclosed. The photodetector includes a substrate having first, second, and third photodiodes and first and second pigment filter layers. The first, second, and third photodiodes generate first, second, and third photodiode output signals, respectively, each photodiode output signal being indicative of a light intensity incident on that photodiode and a dark current that is independent of the light intensity. The first and second pigment filter layers overlie the first and second photodiodes while a layer having both the first and second pigment filter layers overlie the third photodiode. An output circuit combines the first and third photodiode output signals to provide a first corrected output signal and combines the second and third photodiode output signals to provide a second corrected output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.