Peripheral Display Power Line Layout Against Static-Induced Shorts
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Solution Overview
Problem
Static electricity can damage the insulating layer and switching elements in display devices, leading to short-circuits between wires positioned above and below the insulating layer.
Innovation Solution
The display device includes a substrate with a display area and a peripheral area, featuring a first power supply line with a main wire and a sub-wire, and a second power supply line with a main wire and a sub-wire. The second main wire is positioned to not overlap the internal edge of the first main wire, with a spaced distance between them to prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the second power supply line is positioned close to the first power supply line to reduce device area, then the area is reduced, but static electricity can damage the insulating layer and cause short-circuits between the wires
Solution Approach 1:
The patent positions the second power supply line to overlap with the external edge region of the first power supply line in the plan view, utilizing the spatial dimension efficiently. This arrangement allows the wires to be closely positioned without direct contact, reducing device area while maintaining insulation integrity through the layered structure and edge spacing.
Solution Approach 2:
The patent applies different spacing requirements to different regions of the power supply lines. The internal edge region maintains a larger spaced distance (1-500 μm) to prevent static electricity damage, while the external edge region allows overlap to reduce device area. This local differentiation optimizes both reliability and area utilization.
2Reliability
If the spaced distance between the first main wire and second main wire is increased to prevent short-circuits, then reliability is improved, but the device area increases
Solution Approach 1:
The patent utilizes the vertical dimension (layer structure) to resolve the spacing conflict. By positioning the second power supply line on a different layer (on the first insulating layer) and allowing planar overlap with the external edge of the first power supply line, the design achieves close positioning without requiring large lateral spacing, thus preventing short-circuits while minimizing device area.
Solution Approach 2:
The patent employs a nested arrangement where the second power supply line is positioned within the boundary region of the first power supply line in the plan view. The second main wire is nested along the external edge of the first main wire, allowing efficient space utilization while maintaining the required spaced distance from the internal edge to prevent static electricity-induced short-circuits.
Data Source
AI summary
A display device includes: a substrate including a display area and a peripheral area positioned outside the display area; a first power supply line positioned in the peripheral area; a first insulating layer positioned on the first power supply line; and a second power supply line positioned on the first insulating layer in the peripheral area. The first power supply line includes a first main wire extending in a first direction and a first sub-wire diverging toward the display area from the first main wire, the second power supply line includes a second main wire extending in the first direction and a second sub-wire diverging toward the display area from the second main wire, the first main wire includes an internal edge positioned near the first sub-wire and an external edge facing the internal edge, and the second main wire does not overlap the internal edge in a plan view.