LED illuminating device for stage lighting and method for improving color uniformity of the device
US9222643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2010 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Jan 26, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A LED illumination device for stage lighting includes LED arrays (110) packaged on a heat dissipating substrate and including a plurality of LED chips (111), a light combining device (200) for combining the light emitted by respective LED arrays (110), and a focusing lens (400) for focusing the combined light to a light output port. The illumination device further includes a fly-eye lens pair (300) disposed between the light combining device (200) and the focusing lens (400). The fly-eye lens pair (300) comprises two fly-eye lenses, each being formed of a plurality of lens units (310) tightly connected together and having the same lens surface curvature. A method for improving color uniformity of the device is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.