Organic Light Emitting Display Black Matrix Alignment
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Solution Overview
Problem
The manufacturing efficiency of organic light emitting display apparatuses is hindered by the difficulty in integrating both a color filter layer and a black matrix, which are necessary to maintain white balance and increase contrast, due to the complex patterning required for these components.
Innovation Solution
The proposed solution involves an organic light emitting display apparatus structure that includes a substrate, a display unit with organic light emitting devices, an encapsulation layer, a color filter layer, a protection layer made of inorganic materials like calcium oxide or alumina, a black matrix aligned not to overlap with the color filter, and a cover layer, which enhances process efficiency and contrast by preventing damage to the color filter during patterning of the black matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If both a color filter layer and a black matrix are formed to increase contrast and maintain white balance, then display quality is improved, but manufacturing complexity increases due to the need for complex patterning processes
Solution Approach 1:
The color filter layer is formed in advance before the black matrix patterning process. By preparing the color filter layer first and using it as a reference for alignment, the subsequent black matrix patterning can be performed more efficiently without requiring complex simultaneous patterning processes, thus improving display quality while reducing manufacturing complexity
Solution Approach 2:
The invention introduces an alignment reference structure that acts as an intermediary between the color filter layer and the black matrix. This reference structure facilitates precise alignment during the patterning process, enabling both components to be formed with high precision without requiring overly complex manufacturing processes
2Manufacturing precision
If a color filter layer and black matrix are integrated with complex patterning, then contrast and white balance are improved, but manufacturing efficiency decreases
Solution Approach 1:
The color filter layer is formed as a preliminary structure before the black matrix is patterned. This sequential approach with pre-formed reference structures allows for simpler, faster patterning processes while maintaining high contrast and white balance performance, thereby improving manufacturing efficiency without sacrificing display quality
Solution Approach 2:
The manufacturing process is segmented into distinct stages: first forming the color filter layer, then using it as a reference for subsequent black matrix patterning. This segmentation allows each process step to be optimized independently, improving overall manufacturing efficiency while achieving the required precision for contrast and white balance
Data Source
AI summary
Provided is an organic light emitting display apparatus in which process efficiency and contrast are increased. The organic light emitting display apparatus includes a substrate, a display unit that is formed on the substrate and includes an organic light emitting device, an encapsulation layer that is formed on the display unit so as to encapsulate the display unit, a color filter layer that is formed on the encapsulation layer, a protection layer that is formed on the color filter layer, and a black matrix that is formed on the protection layer. The black matrix is aligned not to overlap the color filter layer.