Flexible Substrate with Integrated Detection Capacitors for Bending Monitoring
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Solution Overview
Problem
Conventional OLED display panels face challenges in achieving flexibility and thinness due to the need for additional capacitor substrates to monitor bending, which increases thickness and complicates lightness and thinness goals.
Innovation Solution
A flexible substrate with integrated bendable regions containing detection capacitors that overlap with bendable areas, allowing for capacitance changes to be monitored to determine bending angles, reducing panel thickness and enabling flexible display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional capacitor substrates are added to monitor bending, then bending detection capability is improved, but panel thickness increases
Solution Approach 1:
The patent merges the bending detection function with the existing capacitor structure by integrating detection capacitors into the flexible substrate layers. The first and second detection electrodes are formed within the substrate layers themselves, combining structural and sensing functions into a single integrated component rather than adding separate monitoring substrates.
Solution Approach 2:
The detection electrodes are nested within the flexible substrate structure. The first detection electrode is disposed in a first substrate layer, and the second detection electrode is disposed in a second substrate layer, with both layers being part of the flexible substrate. This nesting approach allows bending detection without adding external thickness.
2Measurement precision
If additional capacitor substrates are added to monitor bending, then bending detection capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into unified structures: the flexible substrate serves both as the structural support and as the housing for detection capacitors. The first and second electrode layers are integrated into the substrate, eliminating the need for separate capacitor substrate assemblies and reducing overall device complexity.
Solution Approach 2:
The flexible substrate is designed to perform multiple functions simultaneously: it provides structural support, enables flexible bending, and houses the detection capacitors for bending monitoring. The first and second electrode layers serve both as electrical conductors and as components of the detection capacitor system.
3Measurement precision
If detection electrodes are placed in bendable regions, then bending detection sensitivity is improved, but electrode reliability deteriorates due to stress
Solution Approach 1:
The patent applies different properties to different regions: the flexible substrate has bendable regions where detection electrodes are placed for sensitivity, and non-bendable regions where reference electrodes are placed for stability. This local differentiation allows the detection electrodes to experience bending for sensitivity while the reference electrodes remain stable for reliable measurement comparison.
Solution Approach 2:
The patent introduces reference electrodes as intermediary elements that provide a stable baseline. By comparing the capacitance changes of detection electrodes (in bendable regions) against reference electrodes (in non-bendable regions), the system can distinguish between capacitance changes caused by bending and those caused by other factors like temperature or manufacturing variations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for flexible display panels that can detect bending information while maintaining a reduced thickness, achieving both flexibility and lightness, and diversifying display functions.
Implementation Method 1
A flexible substrate with integrated bendable regions containing detection capacitors that overlap with bendable areas, allowing for capacitance changes to be monitored to determine bending angles
Data Source
AI summary
A flexible substrate has at least one bendable region. The flexible substrate includes a flexible base, a first electrode layer disposed on the base, a first insulating layer disposed on a side of the first electrode layer away from the base, and a second electrode layer disposed on a side of the first insulating layer away from the base. The first electrode layer includes at least one first detection electrode, and the second electrode layer includes at least one second detection electrode. An orthogonal projection of a first detection electrode on the base overlaps at least partially with an orthogonal projection of a second detection electrode on the base. A region where orthogonal projections of the first detection electrode and the second detection electrode on the base are located overlaps with a bendable region.