Strain Sensor Shielding External Signal Interference
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Solution Overview
Problem
Existing strain sensors face interference from external signals, which affects their detection performance when subjected to external pressure, particularly in applications like display and biomedicine.
Innovation Solution
A strain sensor design featuring a flexible film with a protrusion structure on a carrier substrate and a shielding structure around it, allowing pressure to be transmitted through the protrusion while shielding external signals from interfering with the sensing units, thereby enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a strain sensor uses a flexible substrate with sensing units to detect pressure, then the sensor can convert mechanical deformation into electrical signals for detection, but external signals may interfere with the sensing units and affect detection performance
Solution Approach 1:
The patent introduces a shielding structure as an intermediary element between the protrusion structure and the sensing units. This shielding structure acts as a mediator that blocks external electromagnetic signals from directly reaching the sensing units, thereby reducing interference while allowing the sensor to maintain its pressure detection function. The shielding structure is disposed at least partially around the protrusion structure, creating a protective barrier that filters out harmful external signals.
2Measurement precision
If the sensor structure includes a protrusion structure on the carrier substrate to transmit pressure, then pressure detection capability is enhanced, but the structure becomes more complex and occupies more space
Solution Approach 1:
The patent merges multiple functions into the shielding structure: it serves both as an electromagnetic shield to block external signals and as a structural element that works with the protrusion structure to transmit and focus pressure. By combining these functions into a single integrated component rather than using separate elements, the overall device complexity is reduced while maintaining both the shielding effect and the pressure transmission capability.
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 sensor effectively determines both the magnitude and direction of pressure applied while minimizing external signal interference, improving detection performance and accuracy.
Implementation Method 1
When the strain sensors are subjected to an external pressure, the flexible substrates generate a strain, and the strain of the flexible substrate causes the sensing units to respond
Data Source
AI summary
Provided are a sensor, a display panel and a display device. The sensor includes: a flexible film; a first carrier substrate disposed opposite to and spaced apart from the flexible film; a protrusion structure disposed on a side, facing toward the flexible film, of the first carrier substrate; multiple sensing units located on a side, facing toward the first carrier substrate, of the flexible film; where a perpendicular projection of the protrusion structure on a plane where the flexible film is located does not overlap perpendicular projections of the multiple sensing units on the plane where the flexible film is located; and a shielding structure, which is disposed at least partially around the protrusion structure.