Touch Input Circuitry With Pressure Sensing for False-Touch Filtering
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Solution Overview
Problem
Current mobile terminals often respond to false touch operations due to the lack of precise pressure sensing, leading to unintended actions and a suboptimal user experience.
Innovation Solution
An input circuitry comprising a touch key layer and a pressure sensing layer, where the touch key layer is positioned above the pressure sensing layer, allowing for the acquisition of touch pressure and generation of response instructions based on the sensed pressure, thereby distinguishing intended operations from false ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only touch key layer is used for operation detection, then the device structure is simple, but false touch operations cannot be distinguished from intended operations
Solution Approach 1:
The input circuitry is segmented into two functional layers: a touch key layer for detecting touch operations and a pressure sensing layer for measuring touch pressure. This segmentation allows the system to distinguish between false touches (no pressure) and intended touches (with pressure) while maintaining a relatively simple overall structure.
Solution Approach 2:
The pressure sensing layer acts as an intermediary between the touch key layer and the control unit. It provides additional pressure information that mediates the distinction between false and intended touch operations, enabling more accurate operation detection without significantly increasing structural complexity.
2Reliability
If pressure sensing layer is added to distinguish touch operations, then operation detection accuracy is improved, but device complexity increases
Solution Approach 1:
The touch key layer and pressure sensing layer are merged into a single integrated input circuitry structure. The touch key layer and pressure sensing layer work together as a unified system, sharing common support structures and control interfaces, which reduces the overall structural complexity despite adding pressure sensing functionality.
Solution Approach 2:
The pressure sensing layer serves multiple functions: it detects touch pressure to distinguish intended operations from false touches, provides pressure magnitude information for different operation types, and works cooperatively with the touch key layer for comprehensive touch detection. This multi-functionality justifies the added structural complexity.
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 solution effectively differentiates between intended and false touch operations, enhancing user experience by preventing unintended actions and providing tactile feedback through vibration, while also reducing power consumption by controlling the fingerprint identification layer's energization.
Implementation Method 1
the pressure sensing layer may be configured to acquire touch pressure of the touch operation performed on the touch key layer
Data Source
AI summary
An input circuitry includes: a touch key layer and a pressure sensing layer. The touch key layer is positioned above the pressure sensing layer; the touch key layer is configured to receive touch operation. The pressure sensing layer is configured to acquire touch pressure of the touch operation performed on the touch key layer. The touch pressure is acquired through the pressure sensing layer, a response instruction is generated according to the touch pressure, and the terminal executes the touch instruction.