Method of fabricating a light emitting diode display with integrated defect detection test

摘要

A display panel and method of manufacture are described. In an embodiment, a display substrate includes a pixel area and a non-pixel area. An array of subpixels and corresponding array of bottom electrodes are in the pixel area. An array of micro LED devices are bonded to the array of bottom electrodes. One or more top electrode layers are formed in electrical contact with the array of micro LED devices. In one embodiment a redundant pair of micro LED devices are bonded to the array of bottom electrodes. In one embodiment, the array of micro LED devices are imaged to detect irregularities.

主权项

1. A method of forming a display panel comprising:
transferring an array of micro LED devices from one or more carrier substrates to a corresponding array of bottom electrodes within a corresponding array of subpixels on a display substrate; imaging a surface of the display substrate with a camera to detect irregularities in the array of micro LED devices selected from the group consisting of missing micro LED devices and contaminated micro LED devices; and forming a passivation layer material over a plurality of the irregularities to electrically insulate the plurality of the irregularities.