LED lightbulb
US8894268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Apr 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48247
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lightbulb is configured to properly illuminate a broader region. The LED lightbulb includes a light emitting unit, a pedestal, a power source unit, a heat dissipator, a base, and a globe swelling toward one side in a first direction for enclosing the light emitting unit. The globe is configured to diffusingly transmit light from the light emitting unit. The light emitting unit provides a light amount not less than 50% of the maximum light amount in a region not exceeding ±60° about the central axis extending in the first direction set as 0°. The globe provides a light amount not less than 50% in a region exceeding ±125° about the central axis set as 0°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.