Keyed LED Transfer Template for Precision Manufacturing
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Solution Overview
Problem
Conventional methods for manufacturing LED displays, such as 'pick and place' automation, are inefficient, costly, and lack simplicity while maintaining reliability, particularly in aligning and attaching a large quantity of LEDs to a circuit board effectively.
Innovation Solution
A method involving a template with keyed holes is used to align and transfer keyed LEDs onto a circuit board, utilizing pre-tin deposits or solder paste to secure them, ensuring precise orientation and electrical connectivity through aligned cathode and anode contacts, and applying heat and pressure for bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pick and place automation is used to attach LEDs to the circuit board, then each LED can be placed in a specific orientation and location, but the manufacturing process becomes complex, slow, and costly
Solution Approach 1:
The patent applies preliminary action by pre-attaching LEDs to a transfer sheet in the correct orientations and locations before the actual mounting process. The LEDs are arranged on the transfer sheet with their leads aligned to correspond to the circuit board pad layout, eliminating the need for individual placement during the main manufacturing process. This pre-positioning approach maintains precision while dramatically improving productivity.
Solution Approach 2:
The patent introduces a transfer sheet as an intermediary carrier between the LED source and the final circuit board. The transfer sheet serves as a temporary holding and positioning medium that allows bulk handling of LEDs while maintaining their individual orientations and locations. This intermediary approach enables efficient bulk transfer while preserving the precision required for correct LED placement on the circuit board.
2Manufacturing precision
If conventional pick and place automation is used to attach LEDs to the circuit board, then each LED can be placed in a specific orientation and location, but the manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by pre-attaching LEDs to a transfer sheet in the correct orientations and locations before the actual mounting process. The LEDs are arranged on the transfer sheet with their leads aligned to correspond to the circuit board pad layout, eliminating the need for individual placement during the main manufacturing process. This pre-positioning approach maintains precision while dramatically improving productivity.
Solution Approach 2:
The patent introduces a transfer sheet as an intermediary carrier between the LED source and the final circuit board. The transfer sheet serves as a temporary holding and positioning medium that allows bulk handling of LEDs while maintaining their individual orientations and locations. This intermediary approach enables efficient bulk transfer while preserving the precision required for correct LED placement on the circuit board.
3Productivity
If bulk transfer of LEDs is implemented, then manufacturing speed increases, but aligning LEDs with correct orientation becomes difficult
Solution Approach 1:
The patent applies asymmetry by incorporating a keyed feature on the LED component that corresponds to a matching keyed opening in the transfer sheet. This asymmetric design ensures that each LED can only be inserted into the transfer sheet in the correct rotational orientation, preventing misalignment. The keyed mechanism provides mechanical constraint that guarantees proper orientation during bulk handling and transfer operations.
4Manufacturing precision
If individual LED placement is performed, then orientation precision is maintained, but the quantity of LEDs that can be processed decreases
Solution Approach 1:
The patent applies preliminary action by pre-attaching LEDs to a transfer sheet in the correct orientations and locations before the actual mounting process. The LEDs are arranged on the transfer sheet with their leads aligned to correspond to the circuit board pad layout, eliminating the need for individual placement during the main manufacturing process. This pre-positioning approach maintains precision while dramatically improving productivity.
Solution Approach 2:
The patent merges multiple individual LED placement operations into a single bulk transfer operation. By pre-arranging multiple LEDs on the transfer sheet in their correct positions and orientations, the system combines what would otherwise be numerous separate placement steps into one coordinated transfer action, thereby increasing the quantity of LEDs that can be processed efficiently.
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 manufacturing speed, reduces costs, ensures reliable LED orientation, and allows for complex surface adaptations, enabling bulk transfer and patterning on various circuit board configurations, while maintaining electrical integrity.
Implementation Method 1
heating the circuit board and the template such that the pre-tin deposits melt onto the circuit board to bond the keyed LED's onto the circuit board
Implementation Method 2
applying pressure to the circuit board and the template, and heating the circuit board and the template such that the pre-tin deposits melt onto the circuit board to bond the keyed LED's onto the circuit board
Data Source
AI summary
A method for manufacturing a light emitting diode (LED) display includes providing a template having keyed holes disposed in the template, depositing keyed LED's onto the template manipulating the keyed LED's such that each of the keyed LED's fits within a corresponding keyed hole in the template, and transferring the keyed LED's onto a circuit board.