LED lamp
US4727289A · kind A · utility
370Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Jul 17, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a light-emitting diode lamp having a printed circuit board which is arranged inside a glass bulb having a base at an end thereof, via a stem and stays. A plurality of light-emitting diodes are mounted on the printed circuit board, a current being supplied to the light-emitting diodes through a series resistor. The series resistor has an annular shape and is fitted around the stem, so that a conventional lower-voltage LED lamp can be upgraded to a 100-V LED lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.