Protective cartridge and method with a protective cartridge
US11061262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2018 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Aug 22, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0053
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A protective cartridge for a glare protection apparatus, includes an optical glare protection filter which, in particular, has at least one liquid crystal cell, including at least an open-loop and/or closed-loop control unit, which is configured to control and/or regulate a permeability of the optical glare protection filter, at least between at least one bright level and at least one dark level, depending on a captured work state, on an electronic signal of an external signal source and/or on light irradiation. The permeability of the optical glare protection filter at at least one bright level corresponds to a protection level of less than 2.5, preferably of at most 2.4, advantageously of at most 2.25, particularly advantageously of at most 2 and preferably of at most 1.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.