Stacked Micro-LED Display Substrate for High Resolution
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Solution Overview
Problem
Current micro-LED display devices face manufacturing difficulties in achieving high resolution due to the horizontal positioning of RGB sub-pixels, which limits pixel size and increases manufacturing complexity and yield issues.
Innovation Solution
The solution involves stacking RGB micro-LED arrays in different vertical layers on a display substrate, with optional dielectric layers and transparent fillers for isolation, and connecting them through transparent electrodes, allowing for reduced pixel size and simplified manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If RGB sub-pixels are horizontally positioned and laid out in a display substrate, then the manufacturing process is relatively simple, but the display resolution is limited
Solution Approach 1:
The patent transitions from horizontal arrangement of RGB sub-pixels in a single plane to a vertical stacked arrangement across multiple layers. This dimensional change from 2D to 3D spatial organization allows higher display resolution by reducing the horizontal pixel pitch while maintaining manageable manufacturing complexity through layer-by-layer transfer processes
2Manufacturing precision
If multiple RGB micro-LED arrays are transferred onto a same display surface, then the display resolution can be increased, but the manufacturing complexity dramatically increases
Solution Approach 1:
The patent segments the RGB micro-LED arrays into separate monochromatic layers, with each layer containing only one color (R, G, or B). This segmentation allows each layer to be independently fabricated and transferred, reducing the overall manufacturing complexity compared to transferring complete RGB pixels simultaneously, while achieving high display resolution through the stacked arrangement
3Manufacturing precision
If subsequent color arrays are transferred after initial arrays, then complete RGB display can be achieved, but negative impact on already placed micro-LEDs occurs
Solution Approach 1:
By arranging RGB micro-LEDs in vertically stacked layers rather than horizontally adjacent positions, the patent eliminates the harmful lateral interactions that occur during sequential transfer processes. Each layer can be independently transferred and positioned without causing damage to other color layers, thereby improving yield while maintaining high display resolution
Data Source
AI summary
A display device and an electronics apparatus, the display device comprises: a display substrate; and at least two stacked layers on the display substrate, wherein each stacked layer includes one micro-LED array.