US 10,208,943 B2 · Lamps for enhanced optical brightening and color preference

Abstract

In an embodiment, the disclosure provides a light source comprising at least one solid state light emitter. The light source, in operation, emits substantially white light having a Lighting Preference Index (LPI) of at least about 105, and this emission from the light source comprises a UV-violet flux of at least about 1%. Use of the lamps, light sources, and methods of the present disclosure may afford the ability to display linens and clothing under energy-efficient LED-based illumination, and may impart an effect to (especially white) clothing, that makes them look cleaner than under illumination by prior art LED lamps.

Claims17

Dependent claims

A light source comprising:

a light engine comprising an array of at least one blue LED chip and at least one solid state UV-violet light emitter comprising a peak emission at a wavelength of about 380 nm to about 420 nm,
the array coated on at least a portion of an emitting surface thereof with a phosphor composition, the phosphor composition configured to not appreciably absorb light from the at least one solid state UV-violet light emitter,
the light source in operation emitting substantially white light having a Lighting Preference Index (LPI) of at least about 105 and comprising a UV-violet flux of at least about 1%.

Dependencies are inferred from the claim text.

Facts

Application

15/032,998Filed 28 Oct 2014 · us provisional application

Priority

28 Oct 2013

Published

US 2016/0290573 A16 Oct 2016

Granted

19 Feb 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

F21K 9/233
Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with…
F21K 9/64
Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction: using wavelength…
F21V 9/08
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: for producing coloured light, e.g.…
F21V 19/0015
The light sources being semiconductors devices, e.g. LEDs: fastening arrangements intended to retain light sources

Lamps for enhanced optical brightening and color preference

Life of this patent

Lamps for enhanced optical brightening and color preference

Life of this patent

Abstract

Claims17