Constant current output sink or source
US8427075B2 · kind B2 · utility
1Cited by
2References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2009 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Oct 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant current output sink or source eliminates a current limiting series resistor for a light emitting diode (LED) and maintains a constant light intensity from the LED for all operating and manufacturing variables of a digital device since the current through the LED is maintained at a constant value. The constant current output sink or source may be programmable for selection of a constant current value from a plurality of constant current values available.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.