Selective LED Pickup Control for Precise Subpixel Transfer
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Solution Overview
Problem
Current LED transport devices lack the ability to selectively transport and mount individual light emitting diodes (LEDs) efficiently, leading to increased production time and cost due to the transfer of entire LEDs, which results in defective sub-pixels and reduced product quality.
Innovation Solution
A light emitting diode transport device equipped with a pickup unit and controller that allows for the selective lifting and placement of LEDs on a substrate, utilizing detachable units with variable portions and adhesive materials to precisely handle and mount individual LEDs, enabling precise control over the transfer process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional LED transport devices transfer entire LED arrays, then the transfer process is simple, but the precision of individual LED placement is poor and defects increase
Solution Approach 1:
The pickup unit is divided into multiple independent pickup elements, each capable of independently picking up and placing individual LEDs. This segmentation allows precise control over each LED's placement while maintaining a relatively simple overall device structure.
Solution Approach 2:
The pickup unit can dynamically adjust which pickup elements are activated based on the required LED pattern. This dynamic control enables high precision placement by selectively engaging only the necessary pickup elements, rather than requiring all elements to be precisely controlled simultaneously.
2Manufacturing precision
If individual LEDs are selectively transported, then placement precision improves, but the production time increases
Solution Approach 1:
Multiple pickup elements are combined into a single pickup unit that can operate simultaneously. This allows parallel processing where multiple LEDs are picked up and placed in one operation, maintaining high production rates while achieving individual LED placement precision.
Solution Approach 2:
The pickup unit pre-positions multiple LEDs on the pickup elements before transfer. This preliminary arrangement allows for efficient batch transfer operations, reducing the total time required compared to sequential individual LED placement.
3Reliability
If selective LED transport is implemented, then product quality improves by reducing defects, but the device complexity increases
Solution Approach 1:
The pickup elements automatically engage with LEDs through their adhesive surfaces without requiring complex alignment mechanisms. This self-service capability reduces device complexity while ensuring reliable individual LED pickup and transfer, thereby improving product quality.
Solution Approach 2:
The adhesive-based pickup mechanism replaces complex mechanical gripping systems. This substitution simplifies the pickup unit structure while providing reliable control over individual LED handling, leading to both reduced device complexity and improved product quality.
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
The device enhances the precision and efficiency of LED transfer, allowing for the selective transportation and mounting of desired LEDs, thereby increasing productivity and reducing defects in LED display devices.
Implementation Method 1
a variable portion disposed between the first and second electrodes, the variable part having a dimension changeable by an electric signal applied through the first and second electrodes
Implementation Method 2
an adhesive portion detachably attached to at least one of the plurality of light emitting diodes
Data Source
AI summary
The present disclosure relates to an apparatus for transferring a light emitting diode (LED). The apparatus for transferring an LED includes: a pick-up unit configured to pick up at least some of multiple light emitting diodes (LEDs) arranged on one substrate, and, according to a received control signal, put down LEDs selected from among the picked-up LEDs on another substrate; and a controller configured to transmit the control signal to the pick-up unit so as to enable the pick-up unit to individually pick up or put down each of the multiple LEDs.