Active-Matrix Display Non-Overlapping Power Wiring
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Solution Overview
Problem
In active-matrix display devices, the intersection of wires during manufacturing can introduce foreign substances, leading to insulation breakdown and short circuits, which decreases yield.
Innovation Solution
The configuration includes non-overlapping local power supply wires connected to global power supply wires in the pixel matrix, preventing short circuits and reducing yield loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are arranged to intersect in the pixel matrix to supply multiple power supplies, then the device can function properly with multiple power potentials, but foreign substances may be introduced at intersection areas causing short circuits and decreasing yield
Solution Approach 1:
The patent transitions from a two-dimensional planar wire arrangement to a three-dimensional stacked configuration. Wires that would intersect in the same plane are instead arranged in different layers vertically, eliminating intersection points where foreign substances could cause short circuits while maintaining the necessary electrical connections.
Solution Approach 2:
The patent divides the wire arrangement into multiple discrete layers, separating wires that would otherwise intersect. By segmenting the wiring into different vertical levels, the design eliminates harmful intersections while preserving the functional requirements of multiple power supply connections.
2Adaptability or versatility
If multiple global power supply wires are disposed for each column to supply different power potentials, then pixel cells can receive required power supplies, but the complexity of wiring arrangement increases and intersection areas increase
Solution Approach 1:
The patent utilizes the vertical dimension by stacking multiple wiring layers. This allows multiple global power supply wires to be arranged in different vertical levels rather than requiring complex two-dimensional routing, thereby reducing planar complexity while maintaining the ability to supply multiple power potentials to each pixel cell column.
Data Source
AI summary
An active-matrix display device includes: a pixel matrix that includes a plurality of pixel cells arranged in rows and columns; a first global power supply wire that is disposed for each of the columns in the pixel matrix and connected to each of the plurality of pixel cells in the column; and a second global power supply wire that is disposed for each of the columns in the pixel matrix and connected to each of the plurality of pixel cells in the column. Each of the plurality of pixel cells includes a local power supply wire that is connected to the first global power supply wire, and the local power supply wire does not overlap the second global power supply wire in a plan view of the pixel matrix.