Light emitting diode display with redundancy scheme
AssigneeApple Inc.
InventorsAndreas Bibl, Kapil V. Sakariya, Charles R. Griggs, James Michael Perkins
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Abstract
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.
Claims19
A display panel with redundancy scheme comprising:
- a display substrate including a pixel area that includes an array of subpixels;
- an array of redundant micro LED device pairs within the array of subpixels, wherein each subpixel includes a redundant micro LED device pair, and each redundant micro LED device pair within a respective subpixel is designed to emit a same primary color emission;
- and
- one or more top electrode layers in electrical contact with the array of redundant micro LED device pairs;
- one or more micro LED device irregularities comprising one or more missing micro LED devices from one or more of the redundant micro LED device pairs of the array of redundant micro LED device pairs within the array of subpixels;
- and
- wherein the array of subpixels includes a first subpixel array, a second subpixel array, and a third subpixel array, wherein the first, second, and third subpixel arrays are designed to emit different primary color emissions.
A display panel with redundancy scheme comprising:
- a display substrate including a pixel area that includes an array of subpixels;
- an array of redundant micro LED device pairs within the array of subpixels, wherein each subpixel includes a redundant micro LED device pair, and each redundant micro LED device pair within a respective subpixel is designed to emit a same primary color emission;
- and
- one or more top electrode layers in electrical contact with the array of redundant micro LED device pairs;
- wherein the array of subpixels includes a first subpixel array, a second subpixel array, and a third subpixel array, wherein the first, second, and third subpixel arrays are designed to emit different primary color emissions;
- circuitry to switch and drive the array of subpixels;
- and
- one or more micro LED device irregularities within the array of redundant micro LED device pairs, the irregularities selected from the group consisting of a missing micro LED device, a defective micro LED device, and a contaminated micro LED device;
- wherein each subpixel includes a first landing area and a second landing area, and a first micro LED device of a respective redundant micro LED device pair is bonded to the first landing area and a second micro LED device of the respective redundant micro LED device pair is bonded to the second landing area.
Dependencies are inferred from the claim text.