Koninklijke Philips Corporation N.v.

Philips Lighting Holding B.v.

Leon Wilhelmus Godefridus Stofmeel

Hugo Johan Cornelissen

Martinus Hermanus Wilhelmus Maria Van Delden

Giovanni Cennini

Hendrikus Hubertus Petrus Gommans

Jianghong Yu

Marcellinus Petrus Carolus Michael Krijn

A light output device and manufacturing method in which an array of LEDs is embedded in an encapsulation layer. An array of cavities (or regions of different refractive index) is formed in the encapsulation layer. The cavities/regions have a density or size that is dependent on their proximity to the light emitting diode locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Light output device and method of manufacture

A lighting device has an array of light emitting diodes (LEDs), an adhesion layer having portions with photo-activated electrical conductivity over the LEDs, and electrically charged scattering particles adhered by electrostatic attraction to the adhesion layer portions, thereby forming scattering regions that are self-aligned to the light emitting diodes. A method for manufacturing the lighting device includes photo-activating the adhesion layer using light output from the light emitting diodes to locally vary the conductivity of the adhesion layer; and attaching electrically charged scattering particles to the adhesion layer by electrostatic attraction.

Lighting device with electrostatically adhered scattering particles and method of manufacture

A light output device and manufacturing method in which an array of LEDs () is embedded in an encapsulation layer (). An array of cavities () (or regions of different refractive index) is formed in the encapsulation layer (). The cavities/regions () have a density or size that is dependent on their proximity to the light emitting diode () locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Light output device having an array of cavities with different refractive index within the encapsulation layer

Growing community of inventors

Eindhoven, Netherlands

Leon Wilhelmus Godefridus Stofmeel