Pixel Electrode Layout With Dummy Insulation for LED Alignment
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Solution Overview
Problem
Existing display devices face issues with light emitting element deviation and misalignment, leading to defects due to ineffective fixation of light emitting elements in pixel areas.
Innovation Solution
A pixel design incorporating a dummy insulating pattern within the first opening of each pixel area to secure light emitting elements, preventing deviation by forming a dummy pattern that connects to the electrodes and insulating layers, ensuring proper alignment and reducing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are placed in the first opening without dummy pattern, then the structure is simple and manufacturing is easier, but light emitting elements deviate and misalign causing defects
Solution Approach 1:
A dummy insulating pattern is introduced as an intermediary element within the first opening to provide physical support and fixation for light emitting elements. This dummy pattern acts as a mediator between the substrate and the light emitting elements, preventing their deviation without requiring complex external fixation structures.
Solution Approach 2:
The dummy insulating pattern is formed in advance during the manufacturing process, before the light emitting elements are fully positioned. This preliminary structure preparation ensures that when light emitting elements are placed, they have immediate support and alignment guidance, preventing misalignment issues.
2Manufacturing precision
If dummy insulating pattern is added to fix light emitting elements, then alignment and positioning are improved, but manufacturing process becomes more complex
Solution Approach 1:
The dummy insulating pattern is merged with the existing insulating layer structure of the pixel. By using the same material and forming process for both the insulating layer and the dummy pattern, the manufacturing complexity is minimized while still achieving the positioning function.
Solution Approach 2:
The dummy insulating pattern is made of the same material as the insulating layer, ensuring homogeneous properties throughout the structure. This allows both components to be formed using identical manufacturing processes, simplifying production while maintaining precise positioning capability.
Data Source
AI summary
A pixel may include a substrate, a dummy insulating pattern on the substrate, a first electrode on the substrate and including a (1-1)th electrode and a (1-2)th electrode that are spaced from each other and aligned with each other along a first direction, a second electrode spaced from the first electrode in a second direction different from the first direction, and including a (2-1)th electrode and a (2-2)th electrode that are spaced from each other and aligned with each other along the first direction, a plurality of light emitting elements electrically connected to the first electrode and the second electrode and emitting light, and a first insulating layer on each of the light emitting elements. Here, the dummy insulating pattern may be connected to one end of at least one of the (1-1)th electrode and the (1-2)th electrode that are aligned with each other along the first direction.