Electromagnetic Transfer System for Light Emitting Elements
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Solution Overview
Problem
The challenge lies in efficiently transferring a large number of small light emitting elements, such as LEDs, to a receiving substrate in a single operation, due to their decreasing size and the complexity of precise alignment and positioning.
Innovation Solution
The method employs a series of electromagnetic plates with controlled magnetic properties and insulating nonmagnetic material layers to magnetically attract and position light emitting elements, allowing for accurate transfer and alignment onto a receiving substrate, utilizing a flowchart process that includes initial coarse and finer positioning steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional transfer methods are used for light emitting elements, then the process becomes increasingly difficult as element size decreases, but improving transfer efficiency requires handling larger numbers of smaller elements simultaneously
Solution Approach 1:
The electromagnetic plate is segmented into multiple independent control regions, each capable of independently attracting and releasing light emitting elements. This allows the system to handle large numbers of elements simultaneously while maintaining individual control, resolving the contradiction between transfer efficiency and process complexity
Solution Approach 2:
The electromagnetic plate acts as an intermediary device between the source substrate and receiving substrate. It temporarily holds light emitting elements in a controlled manner, enabling efficient transfer of large numbers of elements without requiring direct complex manipulation between substrates
2Productivity
If more light emitting elements are transferred in a single operation, then productivity improves, but alignment and positioning accuracy becomes more difficult to maintain
Solution Approach 1:
The system incorporates positioning electrodes and control circuits that provide feedback control for each control region on the electromagnetic plate. This ensures that even when handling large numbers of elements simultaneously, each element is precisely positioned and aligned with the receiving substrate
Solution Approach 2:
The electromagnetic plate performs preliminary positioning and alignment of light emitting elements before transfer to the receiving substrate. Elements are attracted to specific control regions in predetermined positions, ensuring alignment accuracy is established before the actual transfer operation
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
This approach enables the efficient transfer of a large quantity of light emitting elements with high accuracy in a single process, ensuring precise alignment and facilitating the formation of display panels, including both monochrome and color displays.
Implementation Method 1
the light emitting elements on the first platform are oriented by a first electromagnetic plate; the light emitting elements on the first platform are transferred to a second platform by a second electromagnetic plate
Data Source
AI summary
A method for transferring a large number of light emitting elements in a single operation during display panel manufacture includes providing a receiving substrate with light emitting elements; orienting the light emitting elements on a first platform by a first electromagnetic plate; transferring the light emitting elements on the first platform to a second platform by a second electromagnetic plate; and transferring the light emitting elements on the second platform to the receiving substrate by a third electromagnetic plate. Each light emitting element undergoes a coarse positioning and finer positionings during the transfer process, so an accuracy of the light emitting elements is high.