Pixel Alignment Electrode Structure for Stable Emission Contact
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Solution Overview
Problem
Current display devices face reliability issues due to variations in pixel electrode placement during manufacturing, leading to potential contact defects between light-emitting elements and pixel electrodes.
Innovation Solution
The design includes a pixel structure with specific sub-pixel arrangements, alignment electrodes, and bridge patterns in a shared layer, ensuring secure contact between light-emitting elements and pixel electrodes, even if the pixel electrode is displaced, by maintaining a consistent alignment and electrical connection across the emission area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel electrode placement is performed during manufacturing, then pixel electrodes can be positioned to connect with light-emitting elements, but variations in placement lead to contact defects and reduced reliability
Solution Approach 1:
The anode and cathode are formed in advance at predetermined positions before the light-emitting element is installed. This preliminary positioning ensures that even if the light-emitting element has slight placement variations, the electrodes are already in optimal positions to maintain contact, thereby improving both manufacturing precision and contact reliability
Solution Approach 2:
The alignment electrode serves as an intermediary structure that guides the positioning of the light-emitting element relative to the pixel electrodes. By providing a reference alignment structure, it mediates the positioning process to ensure accurate contact between the light-emitting element terminals and the pixel electrodes, reducing contact defects
Data Source
AI summary
A pixel according to one or more embodiments of the disclosure may comprise a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged in a first direction, and including an emission area, a non-emission area, a first alignment electrode extending in the first direction, a second alignment electrode extending in the first direction, and spaced apart from the first alignment electrode in a second direction crossing the first direction, a light-emitting element between the first alignment electrode and the second alignment electrode, and including a first end and a second end opposite each other with respect to the second direction, and a first electrode and a second electrode electrically connected to the light-emitting element, and spaced apart from each other in the second direction, the first electrode overlapping the first end of the light-emitting element, and the second electrode overlapping the second end of the light-emitting element.