Display Assembly Substrate With Variable Electrodes for RGB Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current micro-LED transfer technologies for large-area display manufacturing are inefficient, particularly in assembling RGB LEDs simultaneously without color mixing, and require multiple transfer steps, which increases processing time and reduces yield.
Innovation Solution
A substrate with alternating pair electrodes at different intervals and corresponding cell shapes is used, along with a method involving magnetic and electric fields to selectively assemble RGB LEDs, allowing for simultaneous assembly and reducing the number of transfers by applying different voltages and frequencies to prevent color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple transfer steps are used for assembling RGB LEDs, then assembly precision can be maintained, but processing time increases and productivity decreases
Solution Approach 1:
The patent combines multiple transfer operations into a single self-assembly process. By integrating RGB LED assembly into one unified self-assembly step, the patent eliminates sequential transfer steps while maintaining assembly precision through the use of partition walls and electrode-controlled positioning.
Solution Approach 2:
The patent performs preliminary actions by pre-configuring the substrate with partition walls and electrode patterns before the self-assembly process. The partition walls are pre-formed to define cell boundaries, and electrodes are pre-positioned to control LED placement, enabling precise assembly in a single step without requiring subsequent adjustment transfers.
2Productivity
If simultaneous assembly of RGB LEDs is performed, then productivity increases, but color mixing occurs reducing assembly precision
Solution Approach 1:
The patent segments the substrate into distinct cells using partition walls, with each cell designated for a specific color LED (R, G, or B). This physical segmentation prevents color mixing during simultaneous assembly while maintaining high productivity, as LEDs are confined to their designated color zones within the fluid environment.
Solution Approach 2:
The patent applies local quality by creating heterogeneous electrode patterns and partition wall configurations in different regions of the substrate. Each region has tailored electrode intervals and cell shapes matched to the specific requirements of that color's LED assembly, enabling precise simultaneous assembly of multiple colors without interference.
3Manufacturing precision
If different electrode intervals are used for RGB LEDs, then assembly precision for each color improves, but device complexity increases
Solution Approach 1:
The patent implements local quality by varying electrode intervals and cell dimensions in different regions of the substrate according to the specific requirements of each color LED. Red, green, and blue regions have customized electrode patterns and cell shapes optimized for their respective LED types, achieving high assembly precision without requiring a completely different substrate design for each color.
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 efficient simultaneous assembly of RGB LEDs on a substrate, reducing processing time and preventing color mixing, thereby improving assembly rate and yield.
Implementation Method 1
forming an electric field on the substrate to allow the moving semiconductor light-emitting devices to be seated on the cells, wherein the substrate includes first pair electrodes disposed at first intervals, second pair electrodes disposed at second intervals, and third pair electrodes disposed at third intervals, and different voltages are applied to the first pair electrodes, the second pair electrodes, and the third pair electrodes to form an electric field on the substrate
Implementation Method 2
applying a magnetic force to the semiconductor light-emitting devices to move the semiconductor light-emitting devices in one direction
Data Source
AI summary
Discussed is a substrate for manufacturing a display apparatus, and the substrate can include a base portion, pair electrodes disposed on the base portion to extend in an extension direction, a dielectric layer disposed on the base portion to cover the pair electrodes, a partition wall portion disposed on the dielectric layer, and cells defined by the partition wall portion, and arranged to overlap the pair electrodes along the extension direction of the pair electrodes. The pair electrodes are arranged at different intervals.