Defocused optic for multi-chip LED
US9109779B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2011 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Apr 22, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A defocused optic (110, 210) for mixing of light output from a multichip LED (101, 201). The defocused optic (110, 210) includes an outer reflector having a concave inner surface (122, 26, 222, 226) with a varied profile. The outer reflector surrounds an interior reflector (140, 240) having a convex surface (142, 242). The convex surface (142, 242) of the interior reflector (140, 240) is positioned to generally face a multichip LED (101, 201) and may optionally have a varied profile. Appropriate selection of the design parameters of the profiles of the concave inner surface (122, 126, 222, 226), the profile(s) of the convex surface (142, 242), and the rotational angular range over which said profiles are present enables appropriate mixing of the light output from a given multi-chip LED (101, 201).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.