Polygonal Connection Pattern Between Display Lines to Prevent Shorts
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Solution Overview
Problem
The increasing number of pixels per unit area in display devices leads to a decrease in the gap between signal and power lines, resulting in short-circuit defects due to increased resolution.
Innovation Solution
A display device design featuring a connection pattern with a polygonal shape, including at least six sides, positioned between data and power lines, where vertices of the connection pattern are positioned at the shortest distance from the lines, preventing short-circuit defects by maintaining a sufficient distance despite increased resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels per unit area is increased to improve resolution, then the resolution is improved, but the gap between lines decreases causing short-circuit defects
Solution Approach 1:
The connection pattern employs an asymmetric polygonal shape (hexagon, heptagon, or octagon) where one vertex is positioned closer to the first line and another vertex is positioned closer to the second line. This asymmetric geometry allows the connection pattern to maintain adequate spacing from both lines simultaneously, preventing short-circuit defects while enabling higher pixel density and improved resolution.
2Quantity of substance
If the gap between lines is decreased to accommodate more pixels, then the pixel density is improved, but the risk of short-circuit defects increases
Solution Approach 1:
The connection pattern transitions from a simple linear or rectangular configuration to a polygonal shape with multiple vertices positioned at different distances from the lines. This dimensional complexity in the spatial arrangement allows the connection pattern to navigate the constrained space between closely spaced lines, maintaining sufficient clearance to prevent short-circuits while accommodating higher pixel density.
3Ease of manufacture
If a simple connection pattern is used, then the manufacturing is easier, but the short-circuit risk increases with high resolution
Solution Approach 1:
The connection pattern utilizes a polygonal shape with specific parameters (number of sides ranging from hexagon to octagon, specific vertex positioning relative to the lines) that can be systematically adjusted during manufacturing. This parametric approach allows for standardized fabrication processes while maintaining the geometric properties necessary to prevent short-circuit defects in high-resolution displays.
Data Source
AI summary
A display device includes a pixel circuit, a first line disposed on the pixel circuit and a second line disposed on a same layer as the first line. A light emitting element is disposed on the first line and the second line. A connection pattern is disposed on a same layer as the first line and the second line and is disposed between the first line and the second line. The connection pattern connects the pixel circuit and the light emitting element. The connection pattern has a polygonal shape including at least six sides. A first vertex of the connection pattern is positioned at a shortest distance from the first line to the connection pattern and portions of the connection pattern between the first vertex and adjacent vertices are positioned farther from the first line than the first vertex.