Display Electrode Bypass Layout to Shrink Non-Light-Emitting Areas
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Solution Overview
Problem
Current display devices have a significant non-light emitting area that reduces the efficiency and brightness of pixels, as they require complex contact electrode structures that occupy space and can lead to dark spots.
Innovation Solution
The display device incorporates a connection electrode that bypasses other contact electrodes, minimizing the need for partially bent or curved structures and thus reducing the non-light emitting area by electrically connecting them directly, allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex contact electrode structures are used to electrically connect light emitting elements, then electrical connectivity is ensured, but the non-light emitting area increases and pixel efficiency decreases
Solution Approach 1:
The connection electrode transitions from a planar two-dimensional layout to a three-dimensional structure by overlapping the non-light emitting area. This vertical stacking allows electrical connection without occupying additional lateral space, thereby reducing the non-light emitting area while maintaining connectivity.
Solution Approach 2:
The connection electrode serves multiple functions: it provides electrical connection between light emitting elements and simultaneously overlaps the non-light emitting area to minimize its footprint. This multi-functional design resolves the contradiction between ensuring connectivity and reducing area.
2Reliability
If contact electrodes are made larger to ensure electrical connection, then connectivity is improved, but dark spots increase and brightness decreases
Solution Approach 1:
The connection electrode utilizes the vertical dimension by overlapping the non-light emitting area, allowing sufficient electrode area for reliable electrical connection without increasing the lateral footprint that would create dark spots and reduce brightness.
3Reliability
If bent or curved electrode structures are used to connect contact electrodes, then connectivity is achieved, but manufacturing complexity increases
Solution Approach 1:
Instead of using bent or curved structures in the planar dimension, the connection electrode uses vertical overlapping in the third dimension to achieve connection. This simplifies manufacturing as it requires only straightforward deposition processes without complex bending or curving operations.
Data Source
AI summary
A display device includes: a first light emitting element disposed in a first light emitting area; a second light emitting element disposed in a second light emitting area; a first contact electrode electrically connected to a first end portion of the first light emitting element; a second contact electrode electrically connected to a second end portion of the first light emitting element; a third contact electrode electrically connected to a first end portion of the second light emitting element; and a connection electrode electrically connected to the second contact electrode and bypassing the first contact electrode to be electrically connected to the third contact electrode.