Display Substrate Ink Discharge Alignment via Vision Feedback
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Solution Overview
Problem
The challenge in manufacturing display devices is accurately discharging ink onto a display substrate, as thermal expansion and manufacturing errors can misalign the ink discharge with the substrate.
Innovation Solution
The method involves using a vision portion to photograph pixel areas on the substrate, calculating the center of each pixel area, and adjusting the head portion to align with the pixel centers, ensuring accurate ink discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ink discharge is performed using a spray unit, then the display device layers can be formed efficiently, but thermal expansion of the display substrate causes misalignment between the ink discharge position and the pixel areas
Solution Approach 1:
The vision portion photographs the display substrate to obtain position information of pixel areas before the ink discharge process. Based on this preliminary imaging data, the system calculates the actual positions of pixel areas and determines the head portion's discharge positions in advance, allowing compensation for thermal expansion and other position deviations before they affect manufacturing precision
Solution Approach 2:
The system uses the vision portion to continuously monitor and obtain real-time position information of pixel areas on the display substrate. This feedback information is used to dynamically adjust the head portion's discharge positions, ensuring that ink is discharged at accurate locations even when thermal expansion or other factors cause substrate position changes during the manufacturing process
Data Source
AI summary
A method of manufacturing a display device includes: placing a display substrate on a stage; generating a first area image by photographing, by a vision portion arranged to face the display substrate, a first pixel area of the display substrate; finely adjusting, based on the first area image, a head portion to be aligned with a center of the first pixel area; discharging, by the head portion, ink to the first pixel area; generating, by the vision portion, a second area image by photographing a second pixel area of the display substrate; and finely adjusting, based on the second area image, the head portion to be aligned with a center of the second pixel area.