Lighting system with programmable temporal and spatial spectral distributions
US8469547B2 · kind B2 · utility
17Cited by
13References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | May 11, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems and methods permit use of efficient solid state emitters for broad spectrum continuous spectrum lighting defined by illumination data. The illumination data, which can be sold as a commercial product, can be recorded or authored and include spectral, temporal, and spatial information. Intensities of individual emitters such as LEDs can be controlled through a combination of pulse width modulation (PWM) and amplitude modulation (AM) of drive currents. The combination of PWM and AM permits fine tuning of the spectrum of emissions and creation of free space optical data channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.