Pixel Electrode Insulating Layout for Stable LED Element Connection
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Solution Overview
Problem
Current display devices face challenges in reliably connecting light emitting elements between electrodes, leading to suboptimal utilization and stability of emission characteristics in pixels.
Innovation Solution
A display device design that includes a pixel structure with specific electrode and insulating layer configurations, where a light emitting element is positioned between spaced electrodes, with insulating patterns and bank patterns to ensure proper exposure and connection of the element's ends to the electrodes, and a method for fabricating this structure involving the formation of insulating layers and electrodes to align and connect the light emitting elements effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are supplied to pixels, then the display device can emit light, but the connection between the light emitting elements and electrodes is unreliable
Solution Approach 1:
The patent applies preliminary action by pre-forming insulating layers and insulating patterns before supplying light emitting elements to pixels. The insulating patterns are prepared in advance with specific configurations (first insulating pattern under the light emitting element, second insulating pattern exposing ends) to facilitate reliable connection. This preliminary preparation ensures that when light emitting elements are supplied, the connection structure is already in place, improving connection reliability without adding complex assembly steps.
Solution Approach 2:
The patent uses insulating layers and insulating patterns as intermediary structures between the light emitting elements and electrodes. The first insulating layer and first insulating pattern provide isolation and positioning, while the second insulating pattern creates exposure areas for electrical connection. These intermediary structures mediate the connection process, ensuring reliable electrical contact while maintaining proper spacing and alignment, thus improving connection reliability without requiring direct complex electrode-light emitting element interfaces.
2Reliability
If insulating layers and patterns are added to ensure proper connection, then connection reliability improves, but manufacturing complexity increases
Solution Approach 1:
The patent segments the insulating structure into multiple functional parts: a first insulating layer covering the entire electrode area, a first insulating pattern under the light emitting element, and a second insulating pattern exposing the ends. This segmentation allows each insulating component to perform its specific function (isolation, positioning, exposure) efficiently. The segmented structure improves connection reliability by ensuring proper spacing and exposure, while the modular nature of the segmentation allows for systematic manufacturing processes.
Solution Approach 2:
The patent applies local quality by providing different insulating configurations in different areas: the first insulating layer provides general isolation, the first insulating pattern provides localized support under the light emitting element body, and the second insulating pattern creates localized exposure areas at the ends for electrical connection. This localized differentiation ensures that each area has the specific insulating properties needed for its function, improving connection reliability while allowing standard manufacturing techniques to be applied to each region.
Data Source
AI summary
A display device includes a pixel in a display area. The pixel includes: spaced apart first and second electrodes; a first insulating layer on the first electrode and the second electrode and between the first electrode and the second electrode and having a first etch selectivity; a first insulating pattern on the first insulating layer between the first electrode and the second electrode, and having a second etch selectivity; a light emitting element on the first insulating pattern; a second insulating pattern having the second etch selectivity and being on one area of the light emitting element such that a first end and the second end of the light emitting element are exposed; and third and fourth electrodes configured to electrically connect the first end and the second end of the light emitting element to the first and second electrodes, respectively.