Liquid cooled LED lighting device
US8789973B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 2011 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Apr 9, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A liquid cooled LED lighting device includes a sealed housing containing an LED element that emits light. Cooling liquid is contained in the housing to disperse heat generated by the LED element. An enclosure containing compressible material is preferably immovably positioned within the housing and outside of the optical path of the emitted light. The enclosure containing the compressible material compresses in response to expansion of the cooling liquid as it absorbs heat from the LED element. Advantageously, the cooling liquid and the enclosure containing the compressible material act to more efficiently cool the LED element, thereby providing higher light output and increased lifetime of the LED element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.