Abstract: The invention provides a lighting device (100) comprising a first set of light emitting diodes (10) arranged to emit light (14) in a first wavelength range of 300 nm-490 nm, a second set of light emitting diodes (11) arranged to emit light (15) in a second wavelength range of 300 nm-490 nm, a first luminescent element (12) radiationally coupled to the first and second set of light emitting diodes and arranged to convert at least a part of the light of the first wavelength range and at least a part of the light of the second wavelength range into first luminescent element light, a second luminescent element (13) radiationally coupled to at least a subset of the second set of light emitting diodes and arranged to convert at least a part of the light (15) of the second wavelength range into second luminescent element light, wherein, during operation, the brightness level of the light (14) emitted by the first set of light emitting diodes (10) and the brightness level of the light (15) emitted by the second set o

Abstract: The invention provides a light-emitting arrangement (100) comprising a light source (105) adapted to emit light of a first wavelength, and a wavelength converting member (106) arranged to receive light of said first wavelength and adapted to convert at least part of the light of said first wavelength to light of a second wavelength, said wavelength converting member comprising i) a carrier polymeric material comprising a polyester backbone comprising an aromatic moiety, and ii) at least one wavelength converting material of a specified general formula. The perylene derived compounds have been found to have excellent stability when incorporated into said matrix material.

Abstract: The invention provides a light-emitting arrangement (100) comprising a light source (105) adapted to emit light of a first wavelength, and a wavelength converting member (106) arranged to receive light of said first wavelength and adapted to convert at least part of the light of said first wavelength to light of a second wavelength, said wavelength converting member comprising i) a carrier polymeric material comprising a polyester backbone comprising an aromatic moiety, and ii) at least one wavelength converting material of a specified general formula. The perylene derived compounds have been found to have excellent stability when incorporated into said matrix material.

Abstract: The invention relates to an illumination system (10, 12), to a remote phosphor layer (30; 32, 34), to a scattering layer (32), to a luminaire (100), to a display device (300) and to a method of at least partially correcting a light emission characteristic of at least one light source (22) in the illumination system. The illumination system comprises an array of light sources (20) and a remote phosphor layer and/or a scattering layer arranged between the array of light sources and a light output window (40) for emitting the light from the light sources. At least one light source of the array of light sources comprises a light emission characteristic different from the other light sources of the array of light sources.

Abstract: The present invention relates to a lighting device (100) to stimulate plant growth and bio-rhythm of a plant. The lighting device (100) comprising a solid state light source (102) arranged to emit direct red light having a wavelength of 600 to 680 nm, preferably 640 to 680 nm, and a wavelength converting member (106) arranged to receive at least part of said direct red light emitted from said solid state light source (102) and to convert said received direct red light to far-red light having a maximum emission wavelength of 700 to 760 nm, preferably 720 to 760 nm.

Abstract: A coated luminescent particle 100, a luminescent converter element, a light source, a luminaire and a method of manufacturing coating luminescent particles are provided. The coated luminescent particle 100 comprises a luminescent particle 102, a first coating layer 104 and a second coating layer 106. The luminescent particle 102 comprises luminescent material for absorbing light in a first spectral range and for converting the absorbed light towards light of a second spectral range. The luminescent material is sensitive for water. The first coating layer 104 forms a first barrier for water and comprises a metal oxide or a nitride, phosphide, sulfide based coating. The second coating layer 106 forms a second barrier for water and comprises a silicon based polymer or comprises a continuous layer of one of the materials AlPO4, SiO2, Al2O3, and LaPO4. The first coating layer 104 and the second coating layer 106 are light transmitting.

Abstract: The invention relates to a light source (10, 12) comprising a light emitter (20) arranged inside a translucent outer envelope (30, 32). The light emitter comprising a light emitting device (40) and comprising a translucent inner envelope (50) at least partially surrounding the light emitting device, the translucent inner envelope comprising a diffuser. A diameter (di) of the translucent inner envelope is smaller than a diameter (do) of the translucent outer envelope. The translucent outer envelope is connected to a base (60) not being translucent. The translucent outer envelope further comprises a symmetry axis (S). An imaginary base-plane (P) is defined substantially perpendicular to the symmetry axis (S) and intersects with a connection point (C) being part of the translucent outer envelope.

Abstract: The invention relates to a lighting apparatus comprising a conversion material (2) for converting primary light (4) into secondary light (5), wherein the conversion material (2) comprises converting photolummescent material (15), which degrades to non-converting photolummescent material over time when the conversion material (2) is illuminated by the primary light (4). The conversion material (2) is adapted such that, when the conversion material (2) is illuminated by the primary light (4), the relative decrease in concentration of the converting photolummescent material (15) within the conversion material (2) is larger than the relative decrease in intensity of the secondary light (5). This allows the lighting apparatus to provide an only slightly reduced absorbance of the primary light, even if a large part of the photolummescent material has been bleached, and thus a longer lifetime, with the same or a slightly reduced intensity of the secondary light.

Abstract: The invention provides a lighting device (100) comprising a light source (10) and luminescent materials (20). The luminescent materials (20) comprise a first organic luminescent material (120) and a second organic luminescent material (220), the light source (10) together with the luminescent materials (20) being configured to generate white lighting device light (101) during operation. The first organic luminescent material (120) degrades with time at a first degradation rate and the second organic luminescent material (220) degrades with time at a second degradation rate, wherein the first degradation rate is larger than the second degradation rate. The first organic luminescent material is configured in a first layer (130, 1020) and the second organic luminescent material is configured in a second layer (140, 1220).

Abstract: The invention provides a lighting device (1) comprising (a) a light source (100), for producing light source light (110), and (b) a transparent converter device (200), for converting at least part of the light source light (110), wherein the transparent converter device (200) comprises a first polymer containing matrix (201) containing discrete particles (210), wherein the discrete particles (210) comprise a second polymer containing matrix with luminescent material (212) dispersed therein.

Abstract: A wavelength converting element (110) comprising a polymeric material having a polymeric backbone, the polymeric material comprising a wavelength converting moiety, wherein the wavelength converting moiety is adapted to convert light of a first wavelength to light of a second wavelength, and wherein the wavelength converting moiety is covalently attached to the polymer backbone and/or covalently incorporated into the polymer backbone. The stability and lifetime of wavelength converting molecules comprised in a polymeric material may be improved by covalently attaching the wavelength converting moieties to the polymeric material.

Abstract: A stack of layers 100, a lamp, a luminaire and a method of manufacturing a stack of layers is disclosed. The stack of layers 100 comprises a first outer layer 102, a second outer layer 106 and a luminescent layer 104. The first outer layer 102 and the second outer layer 106 are of a light transmitting polymeric material and have an oxygen transmission rate lower than 30 cm3/(m2-day) measured under standard temperature and pressure (STP). The luminescent layer 104 is sandwiched between the first outer layer 102 and the second outer layer 106 and comprises a light transmitting matrix polymer and a luminescent material 108 being configured to absorb light according to an absorption spectrum and convert a portion of the absorbed light towards light of a light emission spectrum.

Abstract: The invention provides a lighting device (100) comprising a light source (10) and luminescent materials (20). The luminescent materials (20) comprise a first organic luminescent material (120) and a second organic luminescent material (220), the light source (10) together with the luminescent materials (20) being configured to generate white lighting device light (101) during operation. The first organic luminescent material (120) degrades with time at a first degradation rate and the second organic luminescent material (220) degrades with time at a second degradation rate, wherein the first degradation rate is larger than the second degradation rate. The first organic luminescent material is configured in a first layer (130, 1020) and the second organic luminescent material is configured in a second layer (140, 1220).

Abstract: The invention provides a light-emitting arrangement, comprising: a light source adapted to emit light of a first wavelength; a wavelength converting member comprising an organic wavelength converting compound adapted to receive light of said first wavelength and to convert at least part of the received light to light of a second wavelength, said wavelength converting member and said light source being mutually spaced apart; and a sealing structure at least partially surrounding said wavelength converting member to form a sealed cavity containing at least said wavelength converting member, said sealed cavity containing an inert gas and oxygen gas, the concentration of oxygen gas being in the range of from 0.05 to 3% based on the total volume within said sealed cavity. An oxygen concentration in this range has been found to have very limited influence on the life time of the organic wavelength converting compound.

Abstract: This invention relates to a light emitting diode device (100) including an outer casing (102), a light emitting diode element (114), which includes at least one light emitting diode (114a), arranged within the outer casing, a light outlet member (108) constituting a part of the outer casing, a sealed cavity (104) containing a controlled atmosphere, and a seal (110) arranged to seal the cavity. The light emitting diode device further comprises a remote organic phosphor element (116) arranged in the sealed cavity.

Abstract: The invention relates to a method for producing a polymer product having integrated luminescent material particles, the polymer product being produced from at least one monomer in liquid phase and at least one kind of powder of luminescent material particles. The method is characterized by adding the luminescent material to the liquid monomer before polymerisation. The invention further relates to a plastic component for light conversion made of the polymer produced according to said method; a Light-emitting device comprising said plastic component; and the use of a polymer produced according to said method.

Abstract: The invention provides a lighting unit comprising a light source, configured to generate light source light, and a light converter, configured remote of the light source and configured to convert at least part of the light source light into luminescent material light. The light converter comprises (a) a yellow light emitting cerium containing garnet luminescent material, (b) a green light emitting luminescent material, (c) a red light emitting organic luminescent material, and (d) a particulate scattering material.

Abstract: A wavelength converting element (110) comprising a polymeric material having a polymeric backbone, the polymeric material comprising a wavelength converting moiety, wherein the wavelength converting moiety is adapted to convert light of a first wavelength to light of a second wavelength, and wherein the wavelength converting moiety is covalently attached to the polymer backbone and/or covalently incorporated into the polymer backbone. The stability and lifetime of wavelength converting molecules comprised in a polymeric material may be improved by covalently attaching the wavelength converting moieties to the polymeric material.

Abstract: The invention provides MRI contrast agents which provide a high sensitivity and which have an optimised body retention time. These agents enable the mapping of the local pH, temperature, oxygen concentration or other metabolites in a patient's body by the use of Chemical Exchange Saturation Transfer (CEST). Particularly pH and temperature mapping are useful for the detection of small cancer lesions and localized inflammation respectively.

Abstract: A wavelength converting element (101, 102, 103, 110) comprising a polymeric carrier material comprising a first wavelength converting material adapted to convert light of a first wavelength to light of a second wavelength, wherein the oxygen diffusion coefficient (D) of the polymeric carrier material is 8×10?13 cm2/s or less at 25° C. A prolonged lifetime of the wavelength converting material is achieved by selecting a polymeric carrier material with an oxygen diffusion coefficient (D) at 8×10?13 cm2/s or less at 25° C.