Display Electrode Guide Structure for Light Emitter Alignment
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Solution Overview
Problem
Display devices face challenges in achieving reliable alignment and manufacturing yield of light emitting elements due to misalignment issues when separately formed light emitting elements are connected to electrodes, leading to potential non-emission of light.
Innovation Solution
The implementation of a display device structure that includes a pixel circuit, insulation layer, etching prevention layer, guide layers, and electrodes, where the light emitting element is positioned between the guide layers and electrically connected to the electrodes, with specific materials and etching selectivity used to ensure precise alignment and prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are separately formed and then connected to electrodes, then manufacturing flexibility is improved, but alignment precision deteriorates leading to misalignment and non-emission
Solution Approach 1:
The patent introduces guide layers as intermediary structures between the separately formed light emitting elements and electrodes. These guide layers provide physical alignment references that enable precise positioning during assembly, thereby resolving the misalignment issue while maintaining the manufacturing flexibility of separate formation and connection approaches.
Solution Approach 2:
The guide layers are formed in advance during the manufacturing process, establishing predetermined alignment references before the light emitting elements are connected to electrodes. This preliminary action ensures that when assembly occurs, the components can be accurately positioned without requiring high-precision alignment during the connection process.
2Manufacturing precision
If guide layers are added to improve alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The guide layers serve multiple functions: they provide alignment references for positioning light emitting elements, act as structural support during assembly, and can serve as part of the final device architecture. By making the guide layers multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved alignment precision.
Data Source
AI summary
A display device including a pixel circuit, an insulation layer covering the pixel circuit, an etching prevention layer disposed on the insulation layer, a first guide layer, a second guide layer, a first electrode, a second electrode, and a light emitting element. The first guide layer and the second guide layer may be disposed on the etching prevention layer and spaced apart from each other. The first electrode may be disposed on the first guide layer and electrically connected to the pixel circuit. The second electrode may be disposed on the first guide layer and insulated from the first electrode. The light emitting element may be in contact with the top surface of the etching prevention layer, disposed between the first guide layer and the second guide layer on a plane, and electrically connected to the first electrode and the second electrode.