Power supply circuit for a diode adapted to emit light in dependence of the prevailing surrounding light
US4804858A · kind A · utility
7Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1988 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Mar 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/906
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply circuit for a light emitting diode may be adjusted automatically by the voltage of a solar cell which is a power source in the circuit by including in the circuit a series connected current regulator governed by said voltage of said solar cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.