Array Substrate Shared Electrode Segmentation
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Solution Overview
Problem
Existing array substrates for display panels face issues such as reduced aperture, increased reflectivity, and risk of short circuits due to the design of shared electrodes and manufacturing processes.
Innovation Solution
The array substrate design includes separated shared electrode lines and common electrode lines, with shared electrode lines not extending to the pixel opening area, allowing for increased aperture and reduced reflectivity. This design also eliminates the need for a crossover line structure, preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shared electrode extends to the opening area of the pixel unit to prevent light leakage, then light leakage is prevented, but the aperture is reduced
Solution Approach 1:
The electrode structure is segmented into two distinct parts: the shared electrode that remains within the pixel unit boundaries and the common electrode that extends to the opening area. This segmentation allows each electrode to perform its specific function without compromising the aperture, as the shared electrode does not need to extend into the opening area to prevent light leakage.
Solution Approach 2:
The function of preventing light leakage is extracted from the shared electrode and transferred to the common electrode. The common electrode is designed to extend to the opening area specifically for light leakage prevention, while the shared electrode is confined to the pixel unit interior, thereby preserving the aperture.
2Object-affected harmful factors
If the common electrode is disposed in the opening area of the pixel unit to prevent light leakage, then light leakage is prevented, but the reflectivity is increased
Solution Approach 1:
The electrode system is segmented such that only the common electrode extends to the opening area, while the shared electrode remains within the pixel unit. This segmentation allows the common electrode to address light leakage without the shared electrode contributing to increased reflectivity in the opening area.
Solution Approach 2:
The light leakage prevention function is extracted from the shared electrode and assigned to the common electrode. This extraction allows the opening area to be occupied only by the common electrode, which can be optimized for light leakage prevention without the additional reflectivity issues associated with shared electrode placement.
3Object-affected harmful factors
If the shared electrode extends longitudinally through multiple pixel units, then light leakage is prevented, but the risk of broken crossover line and short circuit increases
Solution Approach 1:
The electrode structure is segmented into shared electrodes that remain within individual pixel units and common electrodes that extend to the opening area. This segmentation prevents the shared electrode from forming long continuous paths through multiple pixel units, thereby reducing the risk of broken crossover lines and short circuits while maintaining light leakage prevention through the common electrode.
Solution Approach 2:
The light leakage prevention function is extracted from the shared electrode and transferred to the common electrode. This extraction limits the shared electrode to shorter paths within individual pixel units, significantly reducing the reliability risks associated with long continuous electrode paths across multiple pixel units.
4Ease of manufacture
If a four-photomask process is used to form gate lines and common electrodes in a first metal layer, then manufacturing is simplified, but the shared electrode limits the layout design of other components on the same layer
Solution Approach 1:
The electrode formation process is segmented into two stages: first forming the shared electrode and gate line in a first metal layer, then forming the common electrode in a second metal layer. This segmentation allows the shared electrode to be positioned without constraining the subsequent layout design of other components, as the common electrode is added in a separate layer without interfering with the initial four-photomask process.
Solution Approach 2:
The common electrode formation is extracted from the first metal layer process and placed in a second metal layer. This extraction removes the constraint that the shared electrode imposed on the layout design of other components in the first metal layer, while still maintaining the simplicity of the four-photomask process for the initial electrode formation.
Data Source
AI summary
An array substrate and a display panel are provided. The array substrate includes a plurality of pixels, a plurality of data lines, a plurality of gate lines, a plurality of shared electrode lines, a plurality of common electrode lines, and a shared electrode bus line. Each pixel includes a first sub-pixel and a second sub-pixel. In each pixel rows, a first sub-pixel row and an adjacent second sub-pixel row are separated by a first interval. Each gate line is disposed in a corresponding first interval. Each shared electrode line is disposed in the corresponding first interval and is adjacent to a corresponding gate line. Each common electrode line is disposed between two adjacent first intervals. The shared electrode bus line is connected to the plurality of shared electrode lines.