Light string
US9204502B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2014 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Dec 18, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a light string including at least one light series branch which includes a plurality of lights connected in series one another and at least a protecting circuit each connected between a corresponding one of the at least one light series branch and the AC power supply. Each protecting circuit includes a diode bridge rectifier, a line switch connected with the light series branch in series, a sample circuit and a control circuit for opening the line switch when a sample voltage is larger than or equal to a preset voltage. The control circuit has an output terminal that can obtain power from the diode bridge rectifier and control an on-off state of the line switch according to the sample voltage. The structure of the light string is more simply than the existing light string and its power consume and heat is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.