Electronic circuit to monitor a temperature of a light emitting diode
US9372122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2013 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Aug 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic circuit (10) to monitor a temperature of a light emitting diode (1) comprises a current generating circuit (110) to generate a current flow of at least a first and second current (IC1, IC2) through the light emitting diode (1) and a voltage monitoring circuit (120) to monitor a voltage of the light emitting diode (1). The voltage monitoring circuit (120) is further arranged to determine a difference of a respective value of a first and second voltage (Vf1, Vf2) of the light emitting diode (1) to monitor the temperature of the light emitting diode (1), wherein the first voltage (Vf1) and second voltage (Vf2) of the light emitting diode (1) is determined while driving the first and second current (IC2) through the light emitting diode (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.