Solar-powered light assembly with automatic light control
US6573659B2 · kind B2 · utility
43Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solar-powered light assembly comprising at least one light-emitting diode (LED) powered by a rechargeable battery, a solar panel to recharge the battery and to sense light levels, and control circuitry to monitor the rechargeable battery at intervals. At the start of an interval, preferably, the transition from night to day, the control circuitry sets the at least one LED to output light at a pre-determined level based on the battery voltage at the start of the interval. This control scheme is used to adjust the LED output to the available solar illumination recharging the battery to ensure reliable and efficient operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.