Digital shutter control for bright flash recover in night vision equipment
US10734183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Jan 7, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2231/50063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A methodology, for night vision equipment, includes enabling an automatic brightness control (ABC) procedure for a light intensifier having a photocathode that automatically selects a voltage to be applied to the photocathode, sensing current being drawn by the anode, when the current being drawn by the anode exceeds a predetermined threshold, shutting down the photocathode, disabling the ABC procedure, and storing, as a stored voltage value, a value of a voltage that had been selected by the ABC procedure when the current exceeded the predetermined threshold. After a first predetermined period of time, applying a voltage to the photocathode in accordance with the stored voltage value, and after a second predetermined period of time re-enabling the ABC procedure and selecting the stored voltage value as the voltage to be applied to the photocathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.