Koninklijke Philips Corporation N.v.

Berno Hunsche

Hendrik Johannes Boudewijn Jagt

Thomas Diederich

Hendrik Adrianus Van Sprang

Arnd Ritz

Michael Vergöhl

The present invention relates to a LED module which converts pump light from a LED chip () to light at another wavelength, which is emitted from the module. The conversion takes place in a portion of a luminescent material (). The color purity of the LED module is enhanced by reducing any leakage of pump light using a reflector in combination with an absorber. In one embodiment, the absorber is integrated as one or several thin absorbing layers between the layers of a multi-layer reflection filter (); this may yield an even higher reduction of pump light leakage from the module.

LED module

Transparent, temperature-stable coatings based on titanium oxide with a high refractive index and improved thermal and mechanical properties comprise titanium oxide with at least one additive from the group comprising aluminum and/or aluminum oxide, whereby the proportion of Al atoms in the coating, with reference to the total number of metal atoms in the coating is in the range from 2 to 4%.

Transparent titanium oxide-aluminum and/or aluminum oxide coating with rutile structure

High temperature-resistant transparent coatings based on zirconium oxide, which have improved dispersion properties and a high refractive index, comprise zirconium oxide with at least one additive from the group consisting of tantalum and/or tantalum oxide, whereby the proportion of Ta atoms, in relation to the total number of metal atoms in the coating is in the range of 5 to 30%.

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Langerwehe, Germany

Berno Hunsche