Imaging device and method for controlling same
US7420614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Nov 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention pertains to an imaging device and to a process for controlling the device. The device comprises a power supply (1), matrix means allowing an image to be emitted or sensed, the matrix of the matrix imaging means being scanned at a scanning frequency, the power supply (1) converting a DC input voltage (Dce) into at least one DC output voltage (DCs) allowing the powering of the matrix imaging means (2). The power supply (1) is of chopped type and chops the DC input voltage (Dce) at a chopping frequency dependent on the scanning frequency. In the process for controlling the imaging device described above, a useful image is preceded by an offset image and a correction dependent on the offset image is applied to the useful image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.