Readout circuit of infrared focal plane array and control method therefor
US12287242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2023 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Mar 30, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/202
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A readout circuit of infrared focal plane array (FPA) and a control method therefor. The readout circuit is connected to an infrared FPA, which comprises a plurality of pixels. The readout circuit comprises an integral and readout unit, a correction unit and a digital control unit. For each pixel, the correction unit determines an initial bias value based on a to-be-corrected parameter value for the pixel; the integral and readout unit determines, based on a first current corresponding to the initial bias value and a second current caused a pixel response temperature value, a responsive voltage value for the pixel; and the digital control unit adjusts, based on a comparison result between the responsive voltage value and a preset voltage value, the to-be-corrected parameter value for the pixel, to obtain an adjusted parameter value, and determines, based on the adjusted parameter value, an optimal corrected parameter value for the pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.