Mask Assembly Uniform Width for OLED Evaporation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing mask assembly for OLED display panels is not versatile enough to accommodate different sizes, leading to increased production costs and reduced efficiency due to the need for multiple mask assemblies, which can result in deformation and warpage issues caused by varying tensile forces.
Innovation Solution
A mask assembly comprising multiple evaporation masks with the same width, designed to correspond to various display panel sizes, where each mask is subjected to a uniform tensile force, ensuring consistent evaporation accuracy and preventing deformation by matching the width and tensile force across different sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple mask assemblies are used for different display panel sizes, then each panel size can be manufactured with appropriate dimensions, but production costs increase and device complexity increases
Solution Approach 1:
The patent applies universality by designing a single mask assembly that can accommodate multiple display panel sizes (5.5 inches, 6.0 inches, 6.5 inches, and 7.0 inches) through a unified width dimension. This allows one mask assembly to perform multiple functions across different product lines, eliminating the need for separate mask assemblies for each panel size and thereby reducing device complexity and production costs.
Solution Approach 2:
The patent employs parameter changes by adjusting the width of the mask assembly to a standardized value (74.27 mm) that exceeds the width requirements of all target panel sizes. This parameter modification enables the same mask assembly to be used across different panel sizes, achieving versatility while maintaining consistent tensile force characteristics.
2Manufacturing precision
If mask assemblies with different widths are used for different panel sizes, then each mask can be optimized for its specific panel, but tensile force varies causing deformation and warpage
Solution Approach 1:
The patent applies homogeneity by ensuring that all mask assemblies used across different panel sizes have the same width (74.27 mm) and therefore experience the same tensile force during the evaporation process. This uniformity in dimensional parameters prevents variations in tensile force that would otherwise cause deformation and warpage, ensuring consistent manufacturing precision across all panel sizes.
3Adaptability or versatility
If a single mask assembly is used for all panel sizes, then production costs decrease and versatility improves, but the mask width must be increased to accommodate the largest panel
Solution Approach 1:
The patent applies universality by designing a single mask assembly that can accommodate multiple display panel sizes (5.5 inches, 6.0 inches, 6.5 inches, and 7.0 inches) through a unified width dimension. This allows one mask assembly to perform multiple functions across different product lines, eliminating the need for separate mask assemblies for each panel size and thereby reducing device complexity and production costs.
Solution Approach 2:
The patent employs parameter changes by adjusting the width of the mask assembly to a standardized value (74.27 mm) that exceeds the width requirements of all target panel sizes. This parameter modification enables the same mask assembly to be used across different panel sizes, achieving versatility while maintaining consistent tensile force characteristics.
Data Source
AI summary
Provided is a mask assembly, including at least n evaporation masks, n being an integer greater than 2, wherein the at least n evaporation masks have a same width and the at least n evaporation masks respectively correspond to n types of display panels with different sizes, the width matching the n types of display panels with different sizes.