Micro-LED Pixel Insulation Layout to Prevent Electrode Shorts
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Solution Overview
Problem
In micro light-emitting diode display devices, electrical shorts can occur between the second electrode and the first electrode in non-transferred areas of the light-emitting element, leading to reliability issues and potential defects.
Innovation Solution
The implementation of a display device and manufacturing method that includes a substrate with planarization layers and pixels featuring first and second light-emitting element areas, where a first insulating layer with different heights is used to prevent electrical contact between the electrodes, and a lens is disposed on the light-emitting element to enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-emitting element is transferred to a predetermined position on the array substrate, then the electrical connection between electrodes is maintained, but the transfer process may result in mispositioning and potential short circuits
Solution Approach 1:
The patent applies preliminary action by forming a protrusion structure on the array substrate before transferring the light-emitting element. This protrusion pre-establishes a physical guide and support structure that ensures accurate positioning during the transfer process, preventing misalignment between the first and second electrodes while maintaining manufacturing feasibility
Solution Approach 2:
The protrusion acts as an intermediary structure between the array substrate and the light-emitting element. It provides a physical interface that guides the light-emitting element into the correct position during transfer, ensuring that the first electrode on the array substrate and the second electrode on the light-emitting element align properly without direct contact that would cause short circuits
2Ease of manufacture
If the light-emitting element is not transferred to the predetermined position, then the transfer process is simplified, but electrical shorts occur between the first electrode and second electrode
Solution Approach 1:
The protrusion is formed in advance on the array substrate to create a physical barrier and guide structure. This preliminary structure ensures that even if the light-emitting element is not perfectly positioned during transfer, the protrusion prevents direct contact between the first and second electrodes, maintaining electrical insulation while keeping the transfer process simple
Solution Approach 2:
The protrusion structure provides beforehand cushioning by creating a physical separation between the first electrode on the array substrate and the second electrode on the light-emitting element. This pre-established barrier cushions against potential mispositioning during transfer, preventing electrical shorts while maintaining manufacturing simplicity
Data Source
AI summary
The disclosure relates to a display device and a method of manufacturing a display device. A display device according to embodiments of the present specification includes a substrate including a display area and a non-display area, a driving circuit part disposed in the display area on the substrate; a plurality of planarization layers disposed on the driving circuit part, and a plurality of pixels disposed on the plurality of planarization layers in the display area, wherein the plurality of pixels include a plurality of first light-emitting element areas and a plurality of second light-emitting element areas, and a first insulating layer is disposed in the first light-emitting element area and the second light-emitting element area, and the first insulating layer may have different heights in the first light-emitting element area and the second light-emitting element area.