Light-Emitting Element Electrode Layout for Predictable Display Alignment
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Solution Overview
Problem
Existing display devices face challenges in defining electrical connection structures for light emitting elements and predicting the alignment of these elements with high process quality.
Innovation Solution
The display device incorporates electrodes with protruding patterns and insulating layers, featuring asymmetrical light emitting elements with distinct end areas and connecting electrodes, allowing for precise electrical connections and alignment prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are aligned using conventional methods, then manufacturing process is simple, but electrical connection structures cannot be normally defined and alignment quality cannot be predicted
Solution Approach 1:
The insulating layer is segmented into multiple protruding patterns (first protruding pattern and second protruding pattern) with different heights. These segmented structures serve as alignment references for different ends of the light emitting elements, enabling precise positional control and prediction of alignment quality during manufacturing.
Solution Approach 2:
The invention introduces height dimension variation through protruding patterns of different heights (first height and second height) on the insulating layer. This dimensional change creates distinct alignment references that enable both precise electrical connection definition and alignment quality prediction, resolving the contradiction between precision and complexity.
2Manufacturing precision
If asymmetrical light emitting elements are used with different end areas, then electrical connection precision is improved, but manufacturing complexity increases
Solution Approach 1:
Different regions of the insulating layer are given different local qualities through the first and second protruding patterns with distinct heights. The first protruding pattern (first height) aligns with one end of the light emitting element while the second protruding pattern (second height) aligns with the other end, enabling precise electrical connection definition for asymmetrical elements without requiring complete redesign of the manufacturing process.
Data Source
AI summary
A display device including: electrodes on a base layer; an insulating layer on the electrodes and including a first protruding pattern and a second protruding pattern; light emitting elements on the insulating layer, a light emitting element from among the light emitting elements including a first end and a second end, wherein the light emitting elements include a first light emitting element, the first end of the first light emitting element being adjacent to the first protruding pattern, and the second end of the first light emitting element being adjacent to the second protruding pattern; a first connecting electrode electrically connected to the first end of the first light emitting element and including a first base portion and first protruding portions connected to the first base portion; and a second connecting electrode electrically connected to the second end of the first light emitting element.