OLED Panel Blocking Structures Suppress Crosstalk
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Solution Overview
Problem
Existing OLED display panel fabrication processes result in crosstalk between adjacent light-emitting devices due to lateral carrier transport within common film layers, leading to undesired light emission.
Innovation Solution
Incorporating blocking structures with degradation regions on the substrate, where the organic functional film layer covers the degradation region, which degrades carrier transportation, preventing carriers from being transported to adjacent light-emitting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If common film layers are shared across adjacent light-emitting devices to simplify fabrication, then manufacturing complexity is reduced, but carrier transport laterality increases causing crosstalk
Solution Approach 1:
The patent divides the common film layer into multiple segments by introducing blocking structures (insulating layers) between adjacent light-emitting devices. These blocking structures segment the continuous film layer into isolated regions, preventing lateral carrier transport while maintaining the simplified fabrication approach of using common film layers across devices.
Solution Approach 2:
The patent introduces blocking structures as intermediary elements between adjacent light-emitting devices. These blocking structures act as mediators that physically separate the common film layers, blocking the harmful lateral carrier transport pathway while allowing the common film layer structure to be maintained for fabrication simplicity.
2Object-affected harmful factors
If blocking structures are added to prevent carrier transport laterality, then crosstalk is reduced, but device complexity increases
Solution Approach 1:
The patent merges the blocking structures with existing common film layers in the fabrication process. Instead of adding completely separate blocking layers, the insulating layers are integrated into the common film layer structure, allowing simultaneous formation of both the common film layers and blocking structures in a unified fabrication sequence.
Solution Approach 2:
The blocking structures serve multiple functions: they act as insulating barriers to prevent lateral carrier transport, serve as part of the common film layer structure, and provide physical separation between adjacent devices. This multi-functionality reduces the need for additional separate components.
3Object-affected harmful factors
If blocking structures are introduced to isolate adjacent devices, then crosstalk is suppressed, but manufacturing precision requirements increase
Solution Approach 1:
The patent performs preliminary patterning of the common film layer to define blocking regions before forming the complete device structure. By pre-establishing the spatial locations where blocking structures will be formed, subsequent fabrication steps can be aligned to these pre-defined regions, reducing the precision requirements for later alignment-critical steps.
Data Source
AI summary
An organic light-emitting display panel, a fabrication method thereof, and a display apparatus are provided. The organic light-emitting display panel comprises a substrate; a plurality of blocking structures disposed on the substrate, wherein a blocking structure has a first surface facing the substrate and an opposing second surface far away from the substrate; a plurality of first electrodes, wherein a first electrode is configured between adjacent blocking structures; an organic functional film layer covering at least one of the plurality of first electrodes and the plurality of blocking structures, wherein the organic functional film layer includes a light-emitting layer; and a degradation region disposed in a portion of the second surface of the blocking structure, wherein the degradation region degrades a carrier transportation in a portion of the organic functional film layer in which the portion of the organic functional film layer covers the degradation region.