Lighting devices including solid state emitter groups for illuminating printed material with enhanced vibrancy
US9799243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Jul 7, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Combinations of solid state light emitters, optionally arranged to stimulate one or more lumiphoric materials, are used to illuminate surfaces (e.g., upright surfaces) including printed material produced with CMY or CMYK inks. Vibrancy and/or efficacy may be enhanced by increasing the effective steepness of printed ink reflectance wavelength boundaries by illuminating printed material with solid state light emitters of multiple colors having tailored boundaries (e.g., increased separation between colors and/or increased energy in spectral areas highly reflected by CMY inks, or reducing energy of emissions at wavelengths to which the human eye is less sensitive). Lighting devices may include multiple operating modes having different gamut properties (e.g., relative gamut values). One or more subregions of an upright surface bearing printed material may be preferentially illuminated with an array of solid state light emitters including multiple emitters having different peak wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.