Stretchable Display Wiring Mesh for Low-Resistance Power Distribution
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Solution Overview
Problem
Current display devices face challenges in reducing power line resistance, minimizing voltage fluctuations, and optimizing connection line design for improved luminance uniformity and stretchability.
Innovation Solution
A stretchable display device with a mesh-type connection of power lines, featuring first, second, and third connection lines on a stretchable substrate, which reduces resistance, ensures uniform power supply, and increases the design area of connection lines, while minimizing over-etching of the connection substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines are connected in a mesh type structure, then the resistance of power lines is reduced, but the device complexity increases
Solution Approach 1:
The power line connection structure is segmented into multiple types of connection lines (first, second, and third connection lines) that connect adjacent plate patterns in different directions. This segmentation allows the formation of a mesh-type network that reduces resistance by providing multiple parallel paths for current flow, while each individual connection line segment remains relatively simple to manufacture.
2Reliability
If connection lines are increased to reduce voltage fluctuation, then luminance uniformity is improved, but the design area is reduced
Solution Approach 1:
Different types of connection lines (first, second, and third connection lines) are strategically placed in different regions and orientations to locally optimize voltage distribution. The first connection lines connect plate patterns in a first direction, the second connection lines in a second direction, and the third connection lines in a direction different from the first and second directions, creating a mesh structure that provides uniform voltage supply across the entire display area without excessive line density in any single region.
3Reliability
If connection lines are made thicker to reduce resistance, then power supply uniformity is improved, but over-etching of connection substrate increases
Solution Approach 1:
Instead of increasing the thickness (cross-sectional dimension) of individual connection lines to reduce resistance, the solution transitions to a two-dimensional mesh network approach. Multiple thinner connection lines are arranged in a mesh pattern with overlapping current paths, achieving equivalent or superior resistance reduction through increased pathway density rather than individual line thickness. This approach maintains etching precision while improving power supply uniformity.
Data Source
AI summary
A display device includes a stretchable lower substrate; a plurality of first plate patterns which is disposed on the lower substrate; a plurality of first line patterns disposed between the plurality of first plate patterns; a plurality of first connection lines which extends in a first direction; a plurality of second connection lines which extends in a second direction; and a plurality of third connection lines which extends in a direction different from the first direction and the second direction to be connected to four first plate patterns which are adjacent to each other. Accordingly, the plurality of third connection lines which connects wiring lines on the plurality of first plate patterns in a mesh structure is formed to reduce a wiring line resistance.