Nano-Membrane Touch Pressure Sensing Apparatus
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Solution Overview
Problem
Conventional touch pressure detection sensors for touch screen panels struggle with accurately measuring touch pressure due to difficulties in sensing capacitance changes, leading to inadequate pressure grading and increased manufacturing complexity, which affects price competitiveness.
Innovation Solution
A touch pressure sensing apparatus utilizing a nano-membrane member that deforms and reverts with touch pressure, combined with a spacer member and conductive powder, to enhance capacitance measurement precision and prevent structural deformation, while maintaining a thin and uniform thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the gap between electrodes is increased to adjust thickness, then the thickness can be reduced, but the capacitance decreases and measurement performance is degraded
Solution Approach 1:
The patent employs a nano-membrane member as a flexible thin film structure positioned between the electrodes. This nano-membrane deforms under touch pressure, dynamically adjusting the gap distance between electrodes rather than using a fixed gap. The flexible nature of the nano-membrane allows the system to maintain thin overall thickness while preserving sufficient capacitance through dynamic gap modulation, resolving the contradiction between reduced thickness and maintained measurement performance.
Solution Approach 2:
The patent introduces dynamic behavior by using a nano-membrane member that responds to touch pressure by deforming and changing the electrode gap in real-time. Instead of a static gap structure, the system dynamically adjusts the capacitance based on applied pressure, enabling both thin profile and high measurement precision through pressure-dependent capacitance variation.
2Adaptability or versatility
If a conventional touch pressure detection sensor is used, then touch pressure can be detected, but it is difficult to accurately and precisely sense changes in touch pressure, resulting in inability to finely grade touch pressure
Solution Approach 1:
The patent utilizes parameter changes in the nano-membrane's physical state - specifically its deformation degree under different pressure levels. As touch pressure varies, the nano-membrane deforms to different extents, creating corresponding capacitance changes that can be precisely measured. This continuous parameter variation enables fine grading of touch pressure levels, overcoming the limitation of conventional sensors that cannot detect subtle pressure changes.
3Adaptability or versatility
If the thickness is adjusted according to design changes, then design flexibility is improved, but the gap between electrodes increases, reducing capacitance and degrading measurement performance
Solution Approach 1:
The patent resolves the design flexibility vs. measurement performance contradiction by introducing a dynamic nano-membrane structure. The nano-membrane allows the device to be manufactured with a thin, uniform thickness while dynamically adjusting the effective electrode gap during operation based on pressure application. This dynamic adaptation maintains high capacitance values despite the reduced overall thickness, enabling both design flexibility and measurement precision.
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 apparatus achieves precise touch pressure sensing, maintains measurement precision with a spacer member, prevents structural deformation, and reduces manufacturing costs, thereby improving the economic feasibility and competitiveness of touch screen panels.
Implementation Method 1
measuring or sensing touch pressure applied by a user, by detecting a change in capacitance attributable to deformation and reversion of a nano-membrane member according to the touch pressure applied by the user
Implementation Method 2
the porous membrane member deforming or reverting according to touch pressure applied to the first substrate
Data Source
AI summary
The present disclosure relates to an apparatus for sensing touch pressure. The apparatus for sensing touch pressure, according to one mode of the present disclosure, includes: a first substrate provided with a first electrode unit formed thereon; a second substrate provided with a second electrode unit formed thereon; and a porous membrane member provided between the first substrate and the second substrate and deformed or restored according to touch pressure applied to the first substrate.