MULTI-LAYER CONDUCTIVE BACKPLANE FOR LED LIGHT SHEET SEGMENTS

摘要

Relatively small, electrically isolated segments of LED light sheets are fabricated having an anode terminal and a cathode terminal. The segments contain microscopic printed LEDs that are connected in parallel by two conductive layers sandwiching the LEDs. The top conductive layer is transparent. Separately formed from the light sheet segments is a flexible, large area conductor backplane having a single layer or multiple layers of solid metal strips (traces). The segments are laminated over the backplane's metal pattern to supply power to the segment terminals. An adhesive layer secures the segments to the backplane. The metal pattern may connect the segments in series, or parallel, or form an addressable circuit for a display. The segments may be on a common substrate or physically separated from each other prior to the lamination.

主权项

1. An illumination structure comprising:
a plurality of electrically isolated light-emitting segments, each segment comprising:
a first conductive layer;a plurality of inorganic light emitting diodes (LEDs) having a first electrode electrically contacting the first conductive layer;a transparent second conductive layer overlying the LEDs and electrically contacting a second electrode of the LEDs to connect the LEDs in parallel;a first terminal in electrical contact with the first conductive layer; anda second terminal in electrical contact with the second conductive layer; a conductive backplane fabricated separately from the segments, the backplane comprising:
a dielectric backplane substrate; anda metal pattern formed over the backplane substrate, the metal pattern comprising electrodes that align with the first terminal and the second terminal of each of the segments,wherein the plurality of segments is mounted over the metal pattern such that the first terminal and the second terminal of each of the segments electrically contacts associated electrodes of the metal pattern, wherein the metal pattern supplies power to the segments.