FOLDED 3-D LIGHT SHEETS CONTAINING PRINTED LEDS

摘要

A method of forming a light sheet includes printing a layer of inorganic LEDs on a first conductive surface of a substrate, depositing a first dielectric layer, and depositing a second conductor layer over the LEDs so that the LEDs are connected in parallel. At least one of the first conductive surface or the second conductor layer is transparent to allow light to escape. A phosphor layer may be formed over the light sheet so that the LED light mixed with the phosphor light creates white light. The flat light sheet is then folded, such as by molding, to form a three-dimensional structure with angled light emitting walls and reflective surfaces to control a directionality of the emitted light and improve the mixing of light. The folds may form rows of angled walls or polygons.

主权项

1. A light emitting device comprising:
a substrate having a first conductive surface; a layer of inorganic light emitting diodes (LEDs) deposited on the first conductive surface so that a bottom electrode of the LEDs electrically contacts the first conductive surface; a first dielectric layer deposited over the first conductive surface; a second conductor layer over the LEDs so that a top electrode of the LEDs electrically contacts the second conductor layer, wherein at least one of the first conductive surface or the second conductor layer is transparent, wherein the substrate, the first conductive surface, the layer of LEDs, the first dielectric layer, and the second conductor layer form a light sheet; and wherein the light sheet is folded to form a folded light sheet having a plurality of light emitting walls at a plurality of angles.