Curved Array Substrate Capacitors for High Aperture Ratio
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Solution Overview
Problem
Existing display technologies face challenges in maximizing the capacitance of capacitors on array substrates while minimizing the space they occupy, which affects the aperture ratio and lifespan of display devices.
Innovation Solution
The design incorporates a capacitor with metal electrodes arranged in a horizontal direction on the array substrate, featuring curved orthogonal projections and insulation layers to increase overlapping areas, allowing for spiral shapes and sub-capacitors connected in parallel, thereby enhancing capacitance and reducing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capacitance of a capacitor is increased, then the aperture ratio and charging rate are improved, but the space occupied by the capacitor increases
Solution Approach 1:
The patent applies curvature by designing the orthogonal projection of metal electrodes to include curved portions, specifically spiral shapes. This allows the electrodes to pack more efficiently in a given area, increasing the overlapping area between adjacent electrodes without increasing the overall footprint of the capacitor, thus increasing capacitance while minimizing space occupation.
Solution Approach 2:
The patent transitions from straight-line electrode arrangements to spiral-shaped electrode projections, effectively utilizing two-dimensional space more efficiently. The spiral configuration allows adjacent electrodes to overlap over a larger area within the same planar footprint, increasing capacitance without expanding the capacitor's external dimensions.
2Area of stationary object
If the space occupied by a capacitor is reduced, then the aperture ratio is improved, but the capacitance decreases
Solution Approach 1:
By implementing curved portions in the orthogonal projection of metal electrodes, specifically spiral configurations, the patent maximizes the overlapping area between adjacent electrodes within a constrained space. This curvature-based design enables high capacitance to be achieved in a compact footprint, preventing capacitance loss when reducing capacitor size.
Solution Approach 2:
The spiral-shaped electrode projection utilizes two-dimensional space more effectively than linear arrangements. This dimensional optimization allows the capacitor to maintain high capacitance values while occupying reduced space, resolving the trade-off between size reduction and capacitance preservation.
3Reliability
If the overlapping area of metal electrodes is increased, then the capacitance is improved, but the device complexity increases
Solution Approach 1:
The patent employs curved portions in the orthogonal projection of metal electrodes to increase overlapping area. While this increases capacitance, the curvature is implemented through standardized spiral patterns that can be manufactured using conventional photolithography techniques, thereby limiting the increase in device complexity to acceptable levels.
Solution Approach 2:
The patent optimizes parameters such as the number of spiral turns, the width of electrode strips, and the spacing between adjacent electrodes to achieve the desired overlapping area. By carefully controlling these parameters, the patent increases capacitance while keeping the manufacturing process and device structure within manageable complexity bounds.
Data Source
AI summary
An array substrate is provided. The array substrate includes a capacitor, which includes a plurality of metal electrodes arranged opposite to each other. The plurality of metal electrodes are spaced apart from each other in a horizontal direction parallel to a plane in which the array substrate is located, and an orthogonal projection of each of at least two of the plurality of metal electrodes of the capacitor on the plane in which the array substrate is located includes a curved portion.