Lighting device with electrostatically adhered scattering particles and method of manufacture

摘要

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.

主权项

1. A light output device comprising:
an array of electrically interconnected light emitting diodes; a substrate layer within which or on which the light emitting diode array is positioned; an adhesion layer having portions over the light emitting diodes, wherein the adhesion layer portions have a photo-activated electrical conductivity 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.