| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fdfd7c07b4cd6b4fd96b8aa874cf472d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af94221aae5570628def7bf1ebd33e0c |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01L2924-3011
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-3725
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01L2924-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-31
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B45-35 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05B44-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05B41-00 |
| filingDate |
2010-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b601bd4f8386539414a67bce3696fd5 |
| publicationDate |
2011-02-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2011020016-A1 |
| titleOfInvention |
Spectral shift control for dimmable ac led lighting |
| abstract |
Apparatus and associated methods involve operation of an LED light engine in which a relative intensities of selected wavelengths shift as a function of electrical excitation. In an illustrative example, current may be selectively and automatically diverted substantially away from at least one of a number of LEDs arranged in a series circuit until the current or its associated periodic excitation voltage reaches a predetermined threshold level. The diversion current may be smoothly reduced in transition as the excitation current or voltage rises substantially above the predetermined threshold level. A color temperature of the light output may be substantially changed as a predetermined function of the excitation voltage. For example, some embodiments may substantially increase or decrease a color temperature output by a solid state light engine in response to dimming the AC voltage excitation (e.g., by phase-cutting or amplitude modulation). |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102638926-A |
| priorityDate |
2009-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |