Light fixture with power loss detection and emergency egress mode
US10637282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2019 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Feb 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light fixture includes a driver for driving a light engine based on control signals received from a controller coupled to the driver. The driver is further connected to an AC power source and is configured for detecting a power loss from the AC power source and generating a power loss signal. Upon detecting the power loss, the driver sends the power loss signal to the controller. Based on the power loss signal, the controller sends an emergency egress mode control signal to the driver which drives the light engine in the emergency egress mode, i.e. at its full intensity for an emergency time period. Upon expiration of the emergency time period or upon the recovery of the AC power, the controller exits the emergency egress mode by sending a normal control signal to the driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.