Optical and thermal improvement of a two-sided multi-channel filament
US12092271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2022 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | Mar 29, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides an LED filament device (1000) comprising (i) a first LED filament side (1110), (ii) a second LED filament side (1120), (iii) an intermediate layer (440), and (iv) a plurality of sources of light (100), wherein: (a) first sources of light (110) are configured to generate first white light (111) having a first correlated color temperature CCT1; wherein the first sources of light (110) are associated to the first filament side (1110); (b) second sources of light (120) are configured to generate second white light (121) having a second correlated color temperature CCT2; wherein the second sources of light (120) are associated to the first filament side (1110); wherein CCT2−CCT1≥500 K; (c) third sources of light (130) are configured to generate blue third light (131); wherein the third sources of light (130) are associated to the second filament side (1120); (d) fourth sources of light (140) are configured to generate green fourth light (141); wherein the fourth sources of light (140) are associated to the second filament side (1120); (c) fifth sources of light (150) are configured to generate red fifth light (151); wherein the fifth sources of light (150) are ass…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.