High intensity LED illumination device with automated sensor-based control
US10136501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2016 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Aug 25, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting control system includes a device controller containing control circuitry that is configured to control drive currents delivered to a plurality of light emitting diodes (LEDs) of a lighting device. The control circuitry generates commands to compensate for failed LEDs in the plurality of LEDs by controlling drive currents delivered to a group of LEDs so that the illuminance level of light detected by an illuminance sensor will not substantially change because of the failed LED, if the voltage across the group of LEDs is less than the threshold amount. The control circuitry also controls the plurality of LEDs in response to data received from a sensor configured to measure a characteristic value of light received from the lighting device, by controlling drive currents delivered to the LEDs if the detected characteristic value of light from the lighting device has moved above or below a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.