OLED Black Matrix Planarization and Light Shielding
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Solution Overview
Problem
Current organic light-emitting display apparatuses face challenges in achieving high optical efficiency and low manufacturing costs, particularly due to the need for expensive optical polarization films and separate planarizing layers, which increase production costs and complexity.
Innovation Solution
The proposed solution involves an organic light-emitting display apparatus with a substrate, thin-film transistor (TFT), black matrix, pixel electrode, insulation layer, organic emission layer, and counter electrode, where the black matrix is made of a heat-resistant silicon resin material that functions as both a planarizing layer and covers the pixel electrode's edge portions, eliminating the need for additional planarizing layers and reducing external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expensive optical polarization films and separate planarizing layers are used, then manufacturing precision and device performance are improved, but manufacturing cost increases
Solution Approach 1:
The black matrix is integrated with the planarizing layer function by forming a flattened top surface directly on the black matrix structure. This merging eliminates the need for separate planarizing layers and expensive optical polarization films, reducing manufacturing cost while maintaining device performance through the combined structural design
Solution Approach 2:
The black matrix is designed to serve multiple functions simultaneously: it acts as a light-shielding layer, a planarizing layer with a flattened top surface, and a structural support element. This multi-functionality eliminates the need for separate dedicated planarizing layers and reduces material costs while maintaining manufacturing precision
2Manufacturing precision
If multiple separate layers (planarizing layer, optical polarization film) are added, then device performance is improved, but device complexity increases
Solution Approach 1:
The planarizing function is merged into the black matrix structure itself by forming a flattened top surface directly on the black matrix. This integration reduces the number of discrete layers and simplifies the overall device structure while maintaining the necessary optical and structural performance
Solution Approach 2:
The black matrix is designed to perform multiple functions including light shielding, planarization, and structural support. This multi-functionality reduces device complexity by eliminating the need for separate dedicated layers for each function
3Manufacturing precision
If additional planarizing layers are used, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The planarizing layer function is merged with the black matrix by forming a flattened top surface directly on the black matrix structure. This integration achieves the necessary planarization quality for subsequent layer deposition without requiring separate additional planarizing layers, thereby reducing manufacturing cost
Data Source
AI summary
An organic light-emitting display apparatus including a substrate; a thin-film transistor (TFT) arranged on the substrate; a black matrix located between the substrate and the TFT; a pixel electrode, which is located between the substrate and the TFT and having edge portions covered by the black matrix; an insulation layer, which covers the TFT and opens the top surface of the pixel electrode; an organic emission layer, which is arranged on the pixel electrode; and a counter electrode, which is arranged on the organic emission layer.