Energy saving type of light emitting diode lamp
US6820998B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/802
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy saving type of light emitting diode lamp is disclosed. In such a manner, the human body sensor may be used to detect existence of the human body. Thus, the LED lamp is disposed at a low illuminance state normally, and may be converted into a high illuminance state when the human body approaches. In addition, the light sensor may be used to detect the environmental illuminance. Thus, when the environmental illuminance is insufficient, the light source is fully opened or half opened, and when the environmental illuminance is sufficient, the light source is closed. In such a manner, the LED lamp may be operated by a high power with a large current during a short time, so that the LED lamp consumes less electricity, has a long lifetime, and saves energy highly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.