Electromagnetic Display Substrate for Precise LED Transfer
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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 due to difficulties in precise alignment and transfer accuracy.
Innovation Solution
A method involving a first electromagnetic plate with magnetically charged through holes to attract and align light emitting elements, and a receiving substrate with a magnetic shielding layer and electromagnetic circuit layer to guide and transfer these elements using controlled magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the size of light emitting elements is reduced to increase quantity, then the number of elements that can be transferred increases, but the difficulty of precise alignment and transfer accuracy increases
Solution Approach 1:
The patent introduces magnetic fields as an intermediary force to enable precise positioning of light emitting elements during transfer. Electromagnetic plates with controllable magnetic fields serve as mediators between the source and destination substrates, allowing accurate placement of small elements without direct mechanical contact or alignment mechanisms
Solution Approach 2:
The patent replaces traditional mechanical alignment and transfer systems with electromagnetic fields. Instead of using mechanical fixtures, clamps, or direct contact methods to position light emitting elements, the invention uses controllable magnetic fields to attract and position elements with high precision, eliminating mechanical complexity and improving accuracy
2Device complexity
If traditional transfer methods are used for small light emitting elements, then the process is simpler, but the transfer accuracy and alignment precision deteriorate
Solution Approach 1:
The electromagnetic plates serve multiple functions: they can attract light emitting elements, hold them in position, transfer them across substrates, and release them at the destination. This multi-functionality consolidates what would otherwise require multiple separate devices or process steps, maintaining simplicity while achieving high precision
Solution Approach 2:
The patent controls the strength and distribution of magnetic fields by adjusting electrical parameters (current, voltage, frequency) to the electromagnetic plates. By dynamically changing these parameters, the system can precisely control the attraction and positioning of light emitting elements, achieving high transfer accuracy without complex mechanical adjustments
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 method enhances the alignment accuracy and reduces transfer errors, allowing for the efficient transfer of multiple light emitting elements to the receiving substrate, improving the process of creating display panels.
Implementation Method 1
a current is applied to the coils to form a magnetic field, and the first electromagnetic plate is switched off so that each of the light emitting elements can be detached from the first electromagnetic plate by the magnetic field and transferred to a corresponding receiving area
Implementation Method 2
The magnetic shielding material layer defines a plurality of openings, and each opening is arranged to correspond to one of the receiving areas, to allow a magnetic field to pass through
Data Source
AI summary
A method for transferring light emitting elements during manufacture of a display panel includes providing light emitting elements; providing a first electromagnetic plate defining adsorption positions; providing a receiving substrate defining receiving areas; energizing the first electromagnetic plate to magnetically adsorb one of the light emitting elements at each adsorption position; facing the first electromagnetic plate to the receiving substrate; and transferring the light emitting elements to one corresponding receiving area of the receiving substrate.