Glass-Substrate Micro LED Grouping for Fine-Pitch Displays
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Solution Overview
Problem
Micro LEDs mounted on a printed circuit board (PCB) result in large pixel pitches, making it difficult to produce fine pitch displays and incur high material costs.
Innovation Solution
A display device with micro LEDs arranged on a glass substrate, where the LEDs are grouped into multiple groups based on row lines and connected to different data lines, with drive parts on the substrate surfaces to provide scan and image data signals, utilizing through-glass vias for wiring connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If micro LEDs are mounted on a printed circuit board (PCB), then the structure is simple and easy to manufacture, but the pixel pitch becomes large and fine pitch display cannot be achieved
Solution Approach 1:
The patent transitions from mounting micro LEDs on a PCB (two-dimensional plane) to transferring them directly onto a glass substrate (another dimension). This dimensional change enables finer pitch control while maintaining manufacturing simplicity through the transfer process. The glass substrate provides a flat, precise surface for arranging micro LEDs at very small pitch distances that would be difficult to achieve on traditional PCB structures.
2Ease of manufacture
If micro LEDs are mounted on a printed circuit board (PCB), then the manufacturing process is straightforward, but material cost increases
Solution Approach 1:
The patent extracts the micro LEDs from the traditional PCB mounting process and transfers them directly to a glass substrate. This extraction eliminates the need for expensive PCB materials and complex mounting structures, reducing overall material costs while maintaining a straightforward transfer-based manufacturing process. The glass substrate serves as a more cost-effective platform for fine pitch displays compared to PCB materials.
3Manufacturing precision
If micro LEDs are arranged in groups coupled with different data lines, then fine pitch display is achieved, but device complexity increases
Solution Approach 1:
The patent segments the glass substrate into multiple regions, with each region containing micro LEDs of the same color. Each segment is coupled with a dedicated data line, allowing independent control and simplifying the overall wiring structure. This segmentation approach enables fine pitch arrangement while managing device complexity through modular organization of LEDs and data lines by color groups.
Data Source
AI summary
A display device includes a glass substrate, a plurality of micro light emitting diodes (LEDs) disposed on a first surface of the glass substrate, a first drive part disposed on a second surface of the glass substrate and configured to drive the plurality of micro LEDs to emit light in a row-line order, and a second drive part disposed on the second surface of the glass substrate and configured to provide an image data signal through a data line coupled with one or more micro LEDs from among the plurality of micro LEDs. The plurality of micro LEDs are grouped into a plurality of groups based on a row line and each group of the plurality of groups is coupled with a different data line. The one or more micro LEDs belong to a same column line.