Micro OLED Display Panel Hole Injection Layer Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro OLED silicon-based micro-displays suffer from substandard electrical crosstalk due to lateral current leakage between sub-pixels, leading to issues with color gamut and display performance.
Innovation Solution
The display panel incorporates a unique structure with an inner cut-off region and a partition region, featuring a hole injection layer with distinct sub-portions and a step structure that separates these sub-portions, preventing electrical connection and blocking lateral current leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional flat hole injection layer is used, then the manufacturing process is simple, but lateral current leakage occurs between sub-pixels causing electrical crosstalk
Solution Approach 1:
The hole injection layer is divided into multiple isolated islands or segments within each sub-pixel region, preventing continuous lateral current paths between adjacent sub-pixels. This segmentation eliminates the crosstalk issue while maintaining manufacturing feasibility through standard deposition processes.
Solution Approach 2:
The hole injection layer transitions from a two-dimensional flat structure to a three-dimensional multi-level structure with height differences between adjacent regions. This dimensional change creates physical separation that blocks lateral current leakage while allowing electrical connection through vertical pathways.
2Ease of manufacture
If the hole injection layer is made thicker to improve coverage, then manufacturing is easier, but lateral current leakage increases
Solution Approach 1:
Instead of using a continuous thick layer, the hole injection layer is segmented into isolated islands or discontinuous regions. This allows adequate thickness for effective hole injection while preventing continuous lateral pathways that cause crosstalk.
Solution Approach 2:
The hole injection layer has different thicknesses and continuity characteristics in different locations. thicker regions provide good hole injection efficiency, while thinner or isolated regions prevent lateral leakage, creating optimal local properties throughout the structure.
Data Source
AI summary
A display panel and an electronic device are provided. The display panel has an inner cut-off region and a partition region adjacent to inner cut-off region. The display panel includes a substrate, a light-emitting layer, and a hole injection layer. The light-emitting layer is on the substrate. The hole injection layer is between the light-emitting layer and the substrate, and the light-emitting layer is on the hole injection layer and away from the substrate. The hole injection layer includes a first hole injection sub-portion in the partition region and a second hole injection sub-portion in the inner cut-off region and between the light-emitting layer and the substrate. A distance between the second hole injection sub-portion and the substrate is smaller than a distance between the first hole injection sub-portion and the substrate, and the first hole injection sub-portion is separated from the second hole injection sub-portion.