OLED Panel Discrete Structures Prevent Crosstalk
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Solution Overview
Problem
Conventional OLEDs suffer from signal crosstalk due to transverse currents, causing adjacent light emitting units to incorrectly emit light and resulting in poor display performance.
Innovation Solution
The organic light emitting display panel features light emitting units with discretely arranged first auxiliary functional structures, anodes, and light emitting structures, preventing transverse currents and ensuring correct image display by maintaining separation between these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If continuous auxiliary functional structures are used in conventional OLEDs, then manufacturing process is simplified, but transverse currents are generated causing signal crosstalk between adjacent light emitting units
Solution Approach 1:
The auxiliary functional structures are segmented into discrete units corresponding to each light emitting unit, rather than forming continuous structures. This segmentation prevents transverse current flow between adjacent units while maintaining the necessary functional properties within each unit, thereby eliminating signal crosstalk while preserving manufacturing feasibility
Solution Approach 2:
The harmful transverse current path is extracted and removed from the structure by creating isolation regions. The auxiliary functional structures are deliberately designed with gaps or isolation layers between adjacent light emitting units, extracting the problematic current path while retaining the beneficial functions of the auxiliary structures within each unit
2Reliability
If discrete auxiliary functional structures are implemented to prevent transverse currents, then signal crosstalk is eliminated, but manufacturing complexity increases due to additional mask requirements
Solution Approach 1:
The formation of auxiliary functional structures and light emitting structures are merged into a single patterning step using a common mask. This integration allows both discrete structures to be created simultaneously without requiring separate masking processes, thereby maintaining display accuracy while avoiding increased manufacturing complexity
Solution Approach 2:
The mask used for patterning light emitting structures serves a dual function by also defining the auxiliary functional structures. This multi-functionality reduces the total number of masks required in the manufacturing process, eliminating the complexity increase that would otherwise result from discrete structure formation
Data Source
AI summary
An organic light emitting display panel and apparatus, and a manufacturing method therefor are provided. The organic light emitting display panel includes a plurality of light emitting units, the light emitting unit includes an anode, a first auxiliary functional structure, a light emitting structure and a cathode, the anode, the first auxiliary functional structure, the light emitting structure and the cathode are successively laminated, and the first auxiliary functional structures of different light emitting units are arranged separate from one another, the anodes of different light emitting units are arranged separate from one another, and the light emitting structures of different light emitting units are arranged separate from one another.