Display Panel Output-Line Overlap for Compact Driving Circuits
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Solution Overview
Problem
The driving circuit and traces in display panels occupy a large space, limiting the improvement of visual effects.
Innovation Solution
The display panel design includes a driving circuit with cascaded driving units and a first output line that partially overlaps with a capacitor, reducing the overall area by overlapping the output line with the capacitor's electrode plate perpendicular to the substrate plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the driving circuit and traces are arranged in a conventional planar layout, then the circuit functionality is ensured, but the occupied area is large which limits visual effect improvement
Solution Approach 1:
The patent applies dimensionality change by making the first output line extend in the thickness direction (perpendicular to the substrate plane) rather than solely in the plane direction. This allows the output line to overlap with the capacitor electrode plate in the planar view while maintaining electrical connection, effectively utilizing the third dimension to reduce the occupied area on the substrate surface.
Solution Approach 2:
The patent implements nesting by having the first output line pass through or overlap with the space occupied by the capacitor electrode plate. The output line is positioned to utilize the vertical space above or below the capacitor structure, allowing both components to occupy overlapping projected areas without interfering with each other's functionality.
2Reliability
If the output line is made longer to connect driving circuit to pixel circuit, then the electrical connection is ensured, but the visual effect is degraded due to increased area occupation
Solution Approach 1:
The patent resolves this contradiction by changing the routing dimension of the output line. Instead of extending the line in the plane direction (which increases area), the line extends in the thickness direction to achieve the electrical connection. This vertical routing maintains connection reliability while minimizing the projected area occupied by the output line.
3Area of stationary object
If the driving circuit components are arranged to minimize area, then the visual effect is improved, but the circuit performance may be compromised
Solution Approach 1:
The patent maintains circuit performance while minimizing area by utilizing the thickness direction for signal routing. The output line extending vertically allows sufficient length for reliable electrical connection without consuming additional planar space, thus preserving both compactness and circuit functionality.
Solution Approach 2:
The patent introduces the capacitor electrode plate as an intermediary structure that the output line can overlap with or pass through. This intermediary allows the output line to utilize the vertical space around the capacitor, enabling area reduction without compromising the electrical connection between the driving circuit and pixel circuit.
Data Source
AI summary
Provided are a display panel and a display apparatus. The display panel includes: a substrate; and a driving circuit and a first output line located on one side of the substrate, where at least part of the first output line extends along a first direction; the driving circuit includes a plurality of driving units disposed in cascade, the driving units are arranged along a second direction intersecting with the first direction; at least one of the driving units includes a first output terminal and an output module, the first output line is connected to the first output terminal of the driving unit at a current stage, the output module includes a first capacitor electrically connected to the first output terminal; and along a direction perpendicular to a plane of the substrate, the first output line at least partially overlaps with at least one electrode plate of the first capacitor.