Koninklijke Philips Corporation N.v.

Klemens Brunner

Hans-Helmut Bechtel

Erik Paul Boonekamp

Martinus Petrus Joseph Peeters

Benno Spinger

Teunis Willem Tukker

Egbert Lenderink

Peter Alexander Duine

Aldegonda Lucia Weijers

Martijn Henri Richard Lankhorst

Lingli Wang

Hans-Peter Stormberg

Cornelis Jojakim Jalink

Marco Van As

Albrecht Kraus

Gunnar Luettgens

Oscar Arturo Chao Pujol

Jean Paul Jacobs

Guido Henri Maria Van Tartwijk

Van Dijken Albert

A display device () comprising a plurality of lighting units (), each lighting unit comprising at least one light emitting diode () being provided with a fluorescent element () arranged to absorb at least part of the light emitted by said light emitting diode and emit light of a wavelength range different from that of the absorbed light is provided. The fluorescent element () comprises at least one phosphor being an europium(II)-activated halogeno-oxonitridosilicate of the general formula EaSiN:EuOX.

Display device with solid state fluorescent material

The present invention relates to a light emitting diode (LED) or a laser diode () with a functional element () mounted on a light out-coupling side of the LED or laser diode () wherein the functional element () comprises a provision () that allows for electrically contacting the LED or laser diode () on the light out-coupling side.

Light emitting diodes and lasers diodes with color converters

The invention pertains to an (electro)luminescent polymer-acceptor system comprising a polymer with a plurality of chromophores doped with an acceptor for transferring excitation energy from the polymer to the acceptor wherein at least one wavelength of the polymer emission is a wavelength at which the acceptor absorbs energy, and for emitting energy as photons, characterized in that the dwell time of an exciton that is to be transferred from the polymer to the acceptor is longer than the time for transferring said exciton from the polymer to the acceptor, by satisfying the equationk&#x3c;k,wherein kis the rate constant of the energy transfer at &#x3bb; between two chromophores of the polymer, kis the rate constant of the energy transfer at &#x3bb; between the polymer and the acceptor. If the energy transfer processes in the polymer-acceptor system can be described by F&#xf6;rster theory the above equation can be rewritten as{overscore (R)}is the mean distance between the polymer and the acceptor, Ris the F&#xf6;rster radius, and &#x3c4;and &#x3c4;are the experimental lifetimes of a single chromophore and of the plurality of chromophores of the polymer, respectively.

(Electro)luminescent polymer-acceptor system comprising a polymer and an acceptor for transferring excitation energy

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Eindhoven, Netherlands

Klemens Brunner