Touchpad Force-Sensing Trend Analysis for Continuous Clicking
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Solution Overview
Problem
Conventional touchpads fail to accurately detect continuous clicking events due to the slow elastic recovery rate of the spacer layer, leading to variations in force-sensing values that prevent timely recognition of release events, resulting in a poor user experience.
Innovation Solution
A force-sensing processing method that collects and compares force-sensing values in different frames to determine the changing trend of applied force, adjusting the values accordingly to effectively respond to continuous clicking by triggering events in real-time, rather than relying solely on absolute values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the spacer layer uses elastic material for force sensing, then the touchpad can detect force magnitude, but the slow elastic recovery rate causes delayed response to rapid clicking events
Solution Approach 1:
The patent applies dynamics by making the force-sensing processing method adaptive and time-varying. It dynamically adjusts the response evaluation based on the temporal characteristics of force changes, using different judgment criteria for different time scales. This allows the system to respond appropriately to both slow elastic recovery and rapid clicking events.
Solution Approach 2:
The patent implements preliminary action by predicting user intent through continuous monitoring of force-sensing value trends. Before the spacer layer completes its elastic recovery, the system anticipates the release event based on the decreasing trend of force-sensing values, and pre-registers the click event, thus overcoming the delay caused by slow elastic recovery.
2Measurement precision
If the touchpad waits for force-sensing values to return to initial state before registering release event, then measurement accuracy is maintained, but continuous clicking events are missed
Solution Approach 1:
The system performs preliminary detection of release events by monitoring the trend of force-sensing values. When a sufficient decrease is detected, the system pre-registers the release event before the force-sensing values fully return to the initial state, enabling accurate detection of continuous clicking events without waiting for complete elastic recovery.
Solution Approach 2:
The patent introduces dynamic judgment criteria that adapt to the operational context. Instead of using a fixed threshold for release event detection, the system evaluates the change in force-sensing values relative to previous states, allowing it to distinguish between ongoing pressure and release events even during rapid clicking sequences.
3Stability of the object's composition
If the spacer layer recovers slowly after force release, then structural stability is maintained, but force-sensing values do not decrease enough to trigger release events
Solution Approach 1:
The patent resolves this contradiction by introducing dynamic evaluation of force-sensing value changes. Instead of requiring absolute return to initial values, the system dynamically determines release events based on sufficient decreases from peak values, accommodating the slow but stable elastic recovery of the spacer layer while still enabling accurate release detection.
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
Enhances user experience by accurately detecting continuous clicking events and improving the responsiveness of the touchpad to rapid force changes, ensuring that release events are correctly identified and triggered.
Implementation Method 1
the elastic recovery of the spacer layer 12 requires a certain amount of time
Implementation Method 2
When the user releases the applied force, the deformation units 121 gradually recover their shape due to the elasticity
Data Source
AI summary
A force sensing processing method of a touchpad is provided. The comparison values obtained by subtracting the force induction quantities of different frames are used to determine whether the achievement conditions are met. If it is met, a processing step is executed to respond the event to be triggered by the changing trend of the user's force. When the force changes rapidly and the force sensing amount cannot be quickly returned to the originally set trigger threshold value, the force changing trend detected by the comparison values are be used to provide the processing steps in real time, so as to improve the user experience.