Pixel Unit Common Electrode Segmentation for Display Yield
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Solution Overview
Problem
Existing display technologies face challenges in increasing aperture ratio while avoiding short circuits and disconnections of transparent electrode materials, which affect the yield and quality of displays.
Innovation Solution
A pixel unit and array design featuring interlaced first and second pixel structures with common electrode lines separated at the scan line position, connected by a common connecting portion, allowing for increased spacing between electrode components to prevent short circuits and disconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common electrode lines are continuously extended across scan lines, then electrical connection is maintained, but short circuits and disconnections occur due to proximity to pixel electrodes
Solution Approach 1:
The common electrode lines are segmented into first and second common electrode lines that are separated at the scan line position. This segmentation prevents the continuous extension that causes short circuits while maintaining electrical connection through alternative routing paths on opposite sides of the scan line.
Solution Approach 2:
The scan line acts as an intermediary element that physically separates the first and second common electrode lines. This intermediary positioning prevents direct contact between common electrode lines and pixel electrodes, eliminating short circuit risks while maintaining electrical functionality.
2Area of stationary object
If aperture ratio is increased by reducing electrode spacing, then display quality improves, but short circuits occur between electrode components
Solution Approach 1:
The problem of electrode spacing is solved by transitioning from a two-dimensional spacing optimization to a three-dimensional routing strategy. Common electrode lines are routed on opposite sides of the scan line, utilizing the vertical dimension to achieve both increased aperture ratio and maintained electrical insulation.
3Illumination intensity
If transparent electrode materials are used for high transparency, then display brightness improves, but disconnection problems occur due to material fragility
Solution Approach 1:
The design anticipates potential disconnection risks of transparent electrode materials by creating redundant connection paths. The separated common electrode lines on opposite sides of the scan line provide alternative routes, cushioning against material fragility and preventing complete connection failure.
Data Source
AI summary
A pixel unit includes a scan line, data lines, first and second pixel structures, first and second common electrode lines, and a common connecting portion. The first pixel structure includes a first switching element, a first main pixel electrode, a first sub pixel electrode, and a first active element. The second pixel structure includes a second switching element, a second main pixel electrode, a second sub pixel electrode, and a second active element. The first main and sub pixel electrodes and the first active element are electrically connected to the first switching element. The second main and sub pixel electrodes and the second active element are electrically connected to the second switching element. The first and second common electrode lines are separated at a position where the scan line passes. The common connecting portion electrically connects the first common electrode line and the second common electrode line.