Sensing temperature of a light emitting diode
US8274644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2006 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/602
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system (100) for sensing a temperature of a light emitting diode (LED). The system may comprise an LED having a spectral output centered at a first wavelength, a first filter (104) that transitions from attenuation to transmission at about the first wavelength, and a second filter (106) that transitions from transmission to attenuation at about the first wavelength. The system may also comprise a first sensor (108) positioned to sense a first intensity of the LED through the first filter and a second sensor (110) positioned to sense a second intensity of the LED through the second filter. It will be appreciated that a single sensor may be substituted instead of the first and second sensors, provided that the single sensor is capable of selectively viewing the LED through the first and the second filters. The system may also comprise a computer (112) configured to derive a temperature of the LED considering the first intensity and the second intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.