3D Touch Module Signal Separation via Electrode Layer
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Solution Overview
Problem
Existing three-dimensional touch modules face significant electrical signal interference, making it challenging to accurately extract touch and pressure signals, which complicates signal processing and increases production and use costs.
Innovation Solution
A three-dimensional touch module with a control module, a two-dimensional inputting assembly, and a pressure sensing assembly, where independent output signals for touch and pressure are generated and processed, reducing interference and simplifying signal processing by allowing simultaneous or sequential detection and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal filtering is applied to separate touch and pressure signals, then signal extraction becomes possible, but signal processing complexity increases and measurement precision decreases
Solution Approach 1:
The patent divides the signal processing into two independent channels: a first channel for touch signals and a second channel for pressure signals. Each channel has its own amplifier and filter, preventing signal mixing and eliminating the need for complex signal separation processing, thus reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The patent introduces an intermediary structure (the first electrode layer positioned between the touch sensor and pressure sensor) that physically separates the two sensing functions. This spatial separation allows independent signal acquisition without interference, avoiding the need for complex digital signal processing to separate mixed signals.
2Reliability
If independent signal channels are used for touch and pressure, then signal interference is reduced, but device structure becomes more complex
Solution Approach 1:
The patent merges the first electrode layer into the touch sensor structure, making it serve dual purposes: as part of the capacitive touch sensing mechanism and as a physical separator from the pressure sensor. This integration reduces the need for additional separate components while maintaining signal independence.
Solution Approach 2:
The first electrode layer performs multiple functions simultaneously: it acts as an electrode for touch signal detection, provides electrical isolation between touch and pressure sensors, and serves as a structural element of the touch module. This multi-functionality reduces overall device complexity while ensuring reliable signal separation.
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
This configuration enhances signal accuracy, reduces production and use costs, and expands the applicability of the three-dimensional touch assembly by simplifying signal processing and improving response speed.
Implementation Method 1
a piezoelectric material layer 10a
Implementation Method 2
The first output signal corresponds to a capacitive sensing signal of the touch position
Data Source
AI summary
A detection method of a three-dimensional touch module includes: step S1, providing an input signal to a transmitting electrode layer; step S2, outputting a first output signal and transmitting the first output signal to a control module by a two-dimensional inputting assembly, and outputting a second output signal and transmitting the second output signal to the control module by a pressure sensing assembly; and step S3, determining, by the control module, a touch position according to the first output signal and a pressure value according to the second output signal. A three-dimensional touch module includes: a cover plate; a two-dimensional inputting assembly disposed under the cover plate and configured to output a first output signal; a pressure sensing assembly disposed under the cover plate and configured to output a second output signal; and a transmitting electrode layer disposed between the two-dimensional inputting assembly and the pressure sensing assembly.