Micro Control Element Layout for Same-Layer Micro LED Routing
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Solution Overview
Problem
Conventional micro light emitting diode displays require cross-layer traces to avoid short circuits between conducting wires, increasing manufacturing costs.
Innovation Solution
Grouping control units on a micro control element and disposing output pins between control-unit groups, allowing conducting wires to be on the same layer without cross-layer traces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If control units are centrally disposed on the chip, then control functionality is achieved, but cross-layer traces are required to avoid short circuits between adjacent conducting wires, increasing manufacturing costs
Solution Approach 1:
The patent applies dimensionality change by transitioning from a centralized control unit arrangement to a distributed arrangement where control units are interspersed with pixel units in a two-dimensional grid pattern. This spatial reorganization allows conducting wires to remain on the same layer without crossing, eliminating the need for complex cross-layer traces while maintaining control functionality.
Solution Approach 2:
The patent segments the control units and pixel units into alternating positions within the array, creating a distributed architecture. This segmentation allows each control unit to directly control adjacent pixel units through simple lateral connections, avoiding the need for centralized routing and cross-layer traces.
2Reliability
If cross-layer traces are used to connect conducting wires, then short circuit issues are avoided, but manufacturing complexity and cost increase
Solution Approach 1:
The patent resolves the short circuit problem by changing the spatial dimension of wire routing. Instead of using vertical cross-layer traces that risk short circuits, all conducting wires are arranged horizontally on the same layer, connecting control units to pixel units through lateral routes that eliminate short circuit risks while maintaining reliability.
Solution Approach 2:
The patent creates a simplified routing pattern where conducting wires follow uniform lateral paths between adjacent units. This standardized copying of connection patterns across the array simplifies manufacturing processes and reduces costs compared to complex cross-layer routing.
3Device complexity
If control units are centrally disposed, then control logic is consolidated, but conducting wires require complex routing to avoid short circuits
Solution Approach 1:
The patent segments the control functionality into distributed control units that are interspersed throughout the pixel array. Each control unit is positioned adjacent to the pixel units it controls, enabling simple lateral wire routing without complex centralized connections or cross-layer traces.
Solution Approach 2:
The patent transitions from vertical hierarchical routing (centralized control with cross-layer traces) to a two-dimensional lateral routing scheme where control units and pixel units are arranged in alternating positions, allowing all connections to be made on the same layer through horizontal traces.
Data Source
AI summary
A micro control element suitable for controlling multiple micro light emitting diodes is provided. The micro control element includes a substrate, multiple control units, and multiple output pins. The control units are disposed on the substrate, and the control units are grouped into multiple control-unit groups. The output pins are disposed on the substrate and suitable for being respectively connected to the micro light emitting diodes. At least a portion of the output pins are respectively disposed between the control-unit groups. A display device is also provided.