LED bulb
US8770793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Oct 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48091
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an LED bulb, which includes a light source portion including at least one LED chip); a housing including a bottom portion supporting the light source portion and a sidewall portion surrounding the light source portion, and opening at one side of a first direction; a base disposed on the other side of the first direction relative to the housing; and a light guide body disposed in a space surrounded by the sidewall portion, and including an incident surface facing the light source portion, a light-emitting surface for making the light from the incident surface emit toward the one side of the first direction, and a peripheral side surface located between the incident surface and the light-emitting surface, wherein the cross-sectional area of the peripheral side surface becomes increasingly larger from a side of the incident surface toward a side of the light-emitting surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.