OLED Mask Alignment via Absolute Coordinate Correction
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Solution Overview
Problem
Manufacturing deviations in mother glass substrates during the production of fine metal masks for OLED devices lead to alignment offset issues, potentially causing faulty display devices due to accumulated pixel position accuracy deviations during the mask frame assembly process.
Innovation Solution
An alignment method and system that establishes an absolute coordinate system with the metal framework's center as the origin, allowing the array substrate to move until pixel point offsets are within a predetermined error value (1.5 μm), and then transmits these corrected coordinates to a tension device for precise alignment, reducing alignment deviations and the risk of faulty display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mother glass with manufacturing deviations is used as a reference for welding on a FMM Tension Device, then the production process can proceed, but the pixel position accuracy deviations accumulate during subsequent MFA evaporation, causing display device faults
Solution Approach 1:
The patent applies preliminary action by performing alignment measurement and coordinate correction on the mother glass before the welding and evaporation processes. The alignment measurement unit measures pixel points on the mother glass to obtain actual coordinates, and the coordinate correction unit calculates corrected coordinates based on the difference between actual and theoretical coordinates. This preliminary correction prevents accumulation of position accuracy deviations during subsequent MFA evaporation, while maintaining production process continuity.
2Measurement precision
If the center of the metal framework is used as the origin of the absolute coordinate system, then the alignment reference is established, but manufacturing deviations in the mother glass still cause coordinate offsets
Solution Approach 1:
The patent applies feedback by using the alignment measurement unit to measure actual pixel point coordinates on the mother glass, comparing them with theoretical coordinates, and using the coordinate correction unit to calculate corrected coordinates based on the measured deviations. The corrected coordinates are then transmitted to the FMM Tension Device for welding. This feedback loop compensates for manufacturing deviations in the mother glass, ensuring high pixel position accuracy while maintaining a stable alignment reference at the metal framework center.
Data Source
AI summary
An alignment method for manufacturing a mask integration framework is disclosed. The alignment method includes establishing an absolute coordinate system by taking a center of a metal framework as an origin of coordinates, the center of the metal framework coinciding with a center of an array substrate serving as a reference, controlling the array substrate to move, such that an offset of coordinates of a pixel point under the absolute coordinate system with respect to a predetermined theoretical value is smaller than or equal to a predetermined error value, and transmitting the coordinates of the pixel point under the absolute coordinate system, after the array substrate moves, to a tension device. An alignment system for manufacturing mask integration framework is also disclosed.