Light-Emitting Element Electrode Layout for Interference-Free Alignment
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Solution Overview
Problem
Existing display devices face challenges in aligning light emitting elements effectively, leading to signal interference and reduced alignment degree.
Innovation Solution
The display device incorporates a barrier metal layer and/or barrier pattern on the circuit conductive layer to minimize signal interference, with a barrier insulating layer and bank pattern to enhance alignment, and includes a configuration where the first and second electrodes are electrically connected through contact holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit conductive layer is disposed between the first electrode and the second electrode, then electrical connection is achieved, but signal interference occurs during light emitting element alignment
Solution Approach 1:
A barrier metal layer is introduced as an intermediary between the circuit conductive layer and the light emitting element. This barrier metal layer acts as a mediator that blocks signal interference from the circuit conductive layer while allowing the light emitting element to be properly aligned between the first and second electrodes. The barrier metal layer thus resolves the contradiction by maintaining electrical connection reliability while eliminating harmful signal interference.
2Manufacturing precision
If the barrier metal layer is added to block signal interference, then alignment degree improves, but device complexity increases
Solution Approach 1:
The barrier metal layer is designed to serve multiple functions simultaneously: it blocks signal interference from the circuit conductive layer, provides a reference plane for aligning the light emitting element, and maintains electrical isolation between different conductive layers. By making the barrier metal layer multi-functional, the patent improves alignment degree without proportionally increasing device complexity, as a single layer accomplishes multiple objectives.
3Object-affected harmful factors
If the barrier insulating layer is introduced for electrical separation, then signal interference is reduced, but manufacturing steps increase
Solution Approach 1:
The barrier insulating layer and barrier metal layer are combined into an integrated barrier structure. The barrier insulating layer provides electrical separation while the barrier metal layer provides signal shielding and alignment reference. By merging these two layers into a coordinated barrier structure, the patent reduces signal interference through a unified approach that streamlines the manufacturing process compared to implementing separate, independent solutions for insulation and shielding.
Data Source
AI summary
A display device includes a substrate including a plurality of pixels, a circuit conductive layer on the substrate, a barrier metal layer on the circuit conductive layer, a first electrode and a second electrode on the barrier metal layer and spaced apart from each other, and a light emitting element between the first electrode and the second electrode, and the barrier metal layer is electrically separated from the circuit conductive layer.