Electromagnetic-Robotic Transfer for Display Defect Inspection
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Solution Overview
Problem
Existing methods for inspecting display apparatuses face challenges in capturing accurate images due to the transfer process, leading to difficulties in detecting defects accurately.
Innovation Solution
A device and method utilizing an electromagnetic transfer unit, a robotic transfer unit, and a vision unit to transfer a display substrate at uniform velocity, ensuring precise image capture during inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display apparatus is transferred during image capture, then the inspection process can be continuous, but the image quality deteriorates due to motion blur and misalignment
Solution Approach 1:
The transfer path is divided into two distinct segments: an electromagnetic transfer unit for high-speed transport and a robotic transfer unit for precision positioning in the inspection area. This segmentation allows the system to maintain both continuous operation and high image quality by using the appropriate transfer method in each zone.
Solution Approach 2:
The robotic transfer unit acts as an intermediary between the electromagnetic transfer unit and the inspection area. It receives the display apparatus from the electromagnetic transfer unit, positions it precisely at a predetermined location, and maintains it there during image capture, thereby eliminating motion blur while preserving inspection continuity.
2Speed
If the electromagnetic transfer unit is used throughout the entire path, then transfer speed is high, but positioning precision in the inspection area deteriorates
Solution Approach 1:
The transfer system is segmented into two functional zones: the electromagnetic transfer unit handles high-speed transport over long distances, while the robotic transfer unit handles precision positioning in the inspection area. This allows the system to optimize for speed where needed and precision where needed.
Solution Approach 2:
The system dynamically switches between two transfer modes: electromagnetic transfer for high-speed movement and robotic transfer for precision positioning. The display apparatus is transferred electromagnetically to the inspection area, then the robotic unit takes over to precisely position and hold it during inspection, combining the advantages of both transfer methods.
3Measurement precision
If a robotic transfer unit is added for precision positioning, then image capture quality improves, but device complexity increases
Solution Approach 1:
The system is segmented into two functional units with distinct roles: the electromagnetic transfer unit for high-speed transport and the robotic transfer unit for precision positioning. This segmentation allows each unit to be optimized for its specific function, reducing the overall complexity compared to using a single complex system for both tasks.
Solution Approach 2:
The robotic transfer unit serves multiple functions: it receives the display apparatus from the electromagnetic transfer unit, positions it precisely at the predetermined location, holds it steady during image capture, and can transfer it back to the electromagnetic transfer unit after inspection. This multi-functionality reduces the need for additional specialized components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easier and more accurate detection of defects in display apparatuses by maintaining consistent image quality and improving inspection accuracy.
Implementation Method 1
an electromagnetic transfer unit including a first electromagnetic transfer unit extending in a first direction and a second electromagnetic transfer unit spaced apart from and extending parallel to the first electromagnetic transfer unit
Implementation Method 2
a ball screw arranged under the guide portion, extending in a first direction, and including a male thread. The moving unit may include a through-hole with a female thread, the ball screw extending through the through-hole and moving the moving unit according to a rotation of the ball screw.
Data Source
AI summary
Provided are a device and method for inspecting a display apparatus. The device includes an electromagnetic transfer unit including a first electromagnetic transfer unit extending in a first direction and a second electromagnetic transfer unit spaced apart from and extending parallel to the first electromagnetic transfer unit, a stage that is arranged on the electromagnetic transfer unit to support a display substrate, and a robotic transfer unit arranged between the first electromagnetic transfer unit and the second electromagnetic transfer unit and extending in the first direction.