Multi-Layer Wiring for Electro-Optical Device Interference Reduction
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Solution Overview
Problem
Current electro-optical devices face challenges in achieving high resolution and definition due to interference between adjacent pixel circuits and wires, which cannot be fully mitigated by simply suppressing interference orthogonal to the scanning line, limiting the miniaturization of these devices.
Innovation Solution
The electro-optical device incorporates a substrate with multiple wiring layers, including a first transistor, a light-emitting element, and power supply wires that extend in different directions, with power supply wires in each layer positioned between the substrate and the pixel electrode to minimize interference in both orthogonal directions, allowing for efficient current supply and reduced wiring resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between adjacent pixel circuits and wires is reduced to achieve higher resolution, then resolution and definition are improved, but interference between wires increases
Solution Approach 1:
The patent applies multi-layer wiring structure where power supply wires are arranged in different wiring layers (first wiring layer and second wiring layer) to supply current in different directions. This spatial distribution in multiple dimensions reduces the interference between scanning lines and data lines by separating their current paths across layers, thereby enabling higher resolution displays with reduced signal interference.
Solution Approach 2:
The power supply function is segmented into multiple independent power supply wires located in different wiring layers. Instead of using a single power supply wire, the patent divides the current supply path into first power supply wire (in first wiring layer) and second power supply wire (in second wiring layer), allowing independent optimization of each wire's direction and reducing mutual interference between signal lines.
2Object-affected harmful factors
If power supply wire is provided in the same wiring layer as scanning line to suppress interference orthogonal to scanning line, then interference in orthogonal direction is reduced, but interference in other directions cannot be fully suppressed
Solution Approach 1:
The patent extends interference suppression from a single wiring layer to multiple wiring layers. By placing power supply wires in both first wiring layer (extending in first direction) and second wiring layer (extending in second direction), the solution addresses interference in multiple directions simultaneously, enhancing the versatility of interference suppression beyond what single-layer configurations can achieve.
Solution Approach 2:
The power supply wire structure is designed to serve multiple functions: it supplies power current to light-emitting elements while simultaneously suppressing interference in multiple directions (both orthogonal to scanning line and other directions) through its multi-layer arrangement. This multi-functional design makes the wiring structure adaptable to various interference scenarios.
Data Source
AI summary
An electro-optical device includes a substrate provided with a transistor, a plurality of wires that are provided in a plurality of wiring layers between the substrate and a pixel electrode in a Z direction, and are used by the transistor to supply current to a light-emitting element, a scanning line that is provided in a wiring layer and extends in an X direction, and a data line that is provided in a wiring layer and extends in a Y direction. A wire provided in the wiring layer extends in the X direction, and a wire provided in the wiring layer extends in the Y direction.