Low Dielectric Touch Sensor Layer for Noise Attenuation
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Solution Overview
Problem
Traditional touch sensors face challenges in attenuating noise from electronic display panels, which can decrease sensitivity and require additional processing steps and materials, such as air gaps that reduce transmissivity.
Innovation Solution
A touch sensor with a dielectric layer having a low dielectric constant (less than or equal to approximately 3) is used to attenuate noise and protect conductive materials, eliminating the need for air gaps and additional shielding layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional noise attenuation methods (air gaps, shielding layers) are used, then noise from electronic display panels is reduced, but transmissivity decreases and manufacturing complexity increases
Solution Approach 1:
The patent changes the dielectric constant parameter of the layer adjacent to the touch sensor from traditional high values (air gap, shielding layers) to a low value (≤3). This parameter change enables the layer to attenuate noise while maintaining transmissivity, as the low dielectric constant reduces noise interference without requiring physical separation or additional shielding materials that would block light.
Solution Approach 2:
The patent introduces a dielectric layer with low dielectric constant (≤3) as an intermediary between the electronic display panel and the touch sensor. This intermediary layer serves dual functions: it attenuates noise from the display panel while simultaneously maintaining optical transmissivity, replacing the need for air gaps or separate shielding layers that would compromise transmissivity.
2Object-affected harmful factors
If traditional noise attenuation methods (air gaps, shielding layers) are used, then noise from electronic display panels is reduced, but device complexity and manufacturing steps increase
Solution Approach 1:
The patent merges the noise attenuation function with the existing structural layers of the touch sensor by designing the dielectric layer to serve both as a structural component and a noise attenuation element. This consolidation eliminates the need for separate air gaps, shielding layers, or additional processing steps, thereby reducing device complexity while maintaining noise attenuation effectiveness.
Solution Approach 2:
By changing the dielectric constant parameter to ≤3, the patent enables a single layer to perform noise attenuation without requiring additional structural elements or manufacturing steps. This parameter change transforms a potential multi-component solution into a simplified single-layer implementation, reducing device complexity and manufacturing difficulty.
3Object-affected harmful factors
If dielectric layer with low dielectric constant is used, then noise attenuation and transmissivity are maintained, but material selection constraints increase
Solution Approach 1:
The patent establishes a specific parameter range (dielectric constant ≤3) that guides material selection. While this constrains the pool of eligible materials, it enables the use of specific materials like certain polymers and ceramics that naturally exhibit low dielectric constants. The parameter specification transforms material selection from an open-ended process to a targeted search within defined constraints, balancing performance requirements with material availability.
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 low dielectric constant dielectric layer effectively reduces noise interference, improves sensor performance, and maintains transmissivity, while simplifying the manufacturing process and reducing costs.
Implementation Method 1
The dielectric layer has a dielectric constant less than or equal to approximately 3
Data Source
AI summary
In one embodiment, a touch sensor includes a substrate comprising a first surface. The touch sensor further includes a plurality of first electrodes comprising one or more conductive materials on the first surface. The touch sensor further includes a dielectric layer formed over the first electrodes and at least a portion of the first surface. The dielectric layer has a dielectric constant less than or equal to approximately 3.