Display Panel Short-Circuiting Bars and Power Lines Layer Separation
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Solution Overview
Problem
In organic light-emitting display panels, the challenge is to arrange power lines and short-circuiting bars in the fan-out and binding areas without intersecting, to prevent interference with signal transmission and ensure proper functioning during visual tests, as dense trace distributions and shared layers complicate insulation and voltage distribution.
Innovation Solution
The display panel design includes short-circuiting bars and power lines in separate metal layers, with specific arrangements in fan-out and binding areas to prevent intersections, using cross-bridges and optimized trace distributions to maintain separate functions and reduce resistance variations during visual tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the short-circuiting bar and power line are located in the same layer and intersect, then the layout is simplified, but uneven voltage drops and split screens occur affecting test reliability
Solution Approach 1:
The patent resolves the contradiction by moving the short-circuiting bar and power line to different metal layers (dimensional separation). The short-circuiting bar is placed in the first metal layer while the power line is placed in the second metal layer, eliminating intersections and preventing uneven voltage drops that would cause split screens during visual tests.
2Area of stationary object
If the short-circuiting bar is arranged to intersect with the power line, then space is saved, but resistance issues and split screens occur
Solution Approach 1:
The patent uses vertical layering to separate the short-circuiting bar in the first metal layer from the power line in the second metal layer. This dimensional separation allows both components to coexist in the limited fan-out area without intersecting, maintaining signal transmission uniformity and preventing manufacturing defects.
3Reliability
If the short-circuiting bar and power line are insulated by placing them in different layers, then their functions are achieved independently, but the device structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the conductive elements into different metal layers - the short-circuiting bar in the first metal layer and the power line in the second metal layer. This segmentation achieves functional independence and eliminates interference while maintaining a structured, manageable multi-layer configuration.
Data Source
AI summary
A display panel is provided, having a display area, a fan-out area at periphery of the display area, and a binding area located at a side of the fan-out area away from the display area. The display panel includes: first, second and third short-circuiting bars located in the fan-out/binding area and extending along a first direction; and a first power line extending along a second direction intersecting with the first direction. The first power line extends from the binding area passing through the fan-out area to the display area, and is configured to provide a first power signal to a display unit in the display area. The first, second, third short-circuiting bars, and the first power line are located in a first metal layer, and at least one of the first, second, third short-circuiting bars is insulated from and does not intersect with the first power line.