Systems having dedicated light emitting diodes for performance characterization
US11143693B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2020 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Mar 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/857
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a plurality of first LEDs, a plurality of second LEDs, a first controllable current source that is configured to generate a first bias current for driving a first one of the plurality of first LEDs and a plurality of first ones of the plurality of second LEDs, a first measurement circuit that is configured to measure a first current-voltage (I-V) performance characteristic of the first one of the plurality of first LEDs, and a lens that is arranged to receive light from the plurality of second LEDs. A property of the first bias current is determined as a function of at least two measurements of the first I-V performance characteristic that are acquired while the first bias current is applied to the first one of the plurality of first LEDs and the plurality of first ones of the plurality of second LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.