Philips Lighting Holding B.v.

Signify Holding B.v.

Lumileds LLC

Lumileds Holding B.v.

Dirk Veldman

Rifat Ata Mustafa Hikmet

Ties Van Bommel

Johan Lub

Roelof Koole

Marcel Rene Bohmer

Martinus Petrus Joseph Peeters

Kentaro Shimizu

René Theodorus Wegh

Paulus Albertus Van Hal

Patrick John Baesjou

Manuela Lunz

Henricus Marie Peeters

Cornelis Eustatius Timmering

Rob Franciscus Maria Van Elmpt

Wijnand Evert Jacobus Van Kooten

Loes Johanna Mathilda Koopmans

A lighting device () is disclosed. The lighting device comprises a light source (), an at least partially light transmitting envelope () and a dispenser (). The envelope is arranged to define a sealed space () in which at least a portion of the light source is arranged. Further, the dispenser comprises a chemically reactive substance and is adapted to gradually release at least some of the chemically reactive substance to the sealed space so as to reduce contaminants and by-products that may be present in the sealed space.

Lighting device with dispenser for a reactive substance

The present invention relates to a lighting device () to stimulate plant growth and bio-rhythm of a plant. The lighting device () comprising a solid state light source () arranged to emit direct red light having a wavelength of 600 to 680 nm, preferably 640 to 680 nm, and a wavelength converting member () arranged to receive at least part of said direct red light emitted from said solid state light source () 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.

Horticulture lighting device and a method to stimulate plant growth and bio-rhythm of a plant

The invention provides a lighting device for providing light, the lighting device comprising a closed chamber with a light transmissive window and a light source configured to provide light source radiation into the chamber, wherein the chamber further encloses a wavelength converter configured to convert at least part of the light source radiation into wavelength converter light, wherein the light transmissive window is transmissive for the wavelength converter light, wherein the wavelength converter comprises luminescent quantum dots which upon excitation with at least part of the light source radiation generate at least part of the wavelength converter light, and wherein the closed chamber comprises a filling gas comprising one or more of helium gas, hydrogen gas, nitrogen gas or oxygen gas, the filling gas having a relative humidity at 19&#xb0; C. of at least 5%.

Quantum dots in enclosed environment

The invention provides a lighting device comprising (a) a light converter comprising a light receiving face; and (b) a solid state light source configured to generate a light source light with a photon flux of at least 10 W/cmat the light receiving face, wherein the light converter is configured to convert at least part of the light source light into light converter light having a first frequency, wherein the light converter comprises a semiconductor quantum dot in an optical structure selected from a photonic crystal structure and a plasmonic structure, wherein the optical structure is configured to increase the photon density of states in the light converter resonant with the first frequency for reducing saturation quenching, and wherein the quantum dot has a quantum efficiency of at least 80%.

Quantum dots with reduced saturation quenching

The invention provides a lighting device () comprising (a) a light source () configured to generate light source light (), and (b) a light converter () configured to convert at least part of the light source light () into visible converter light (), wherein the light converter () comprises a matrix () containing an organic luminescent material () of the benzoxanthene derivative type. The lighting device may further comprise a further luminescent material ().

Class of green/yellow emitting phosphors based on benzoxanthene derivatives for LED lighting

A wavelength converting member is provided, comprising a wavelength converting layer comprising an organic wavelength converting compound distributed in a matrix comprising an amorphous or semi-crystalline aromatic polyester wherein the aromatic polyester molecules are predominantly in a randomly oriented state, said wavelength converting member further comprising at least one support element. By avoiding uniaxial or biaxial orientation of the polyester matrix, the organic wavelength converting compound (organic phosphor) is well protected against photo-chemical degradation. The support element ensures the dimensional stability of the polyester matrix at temperature above the glass transition temperature.

Stabilized wavelength converting element

The invention provides a lighting device () comprising (a) a light source () configured to generate light source light (), and (b) a light converter () configured to convert at least part of the light source light () into visible converter light (), wherein the light converter () comprises a matrix () containing a luminescent material () based on derivatives of benzimidazoxanthenoisoquinolinone. The lighting device may further comprise a further luminescent material ().

Class of green/yellow emitting phosphors based on derivatives of benzimidazoxanthenoisoquinolinone for LED lighting

Growing community of inventors

Eindhoven, Netherlands

Dirk Veldman