Touch Sensitivity Adjustment for Gloved and Wet Input
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Solution Overview
Problem
Capacitive touch input devices malfunction when a touch object is stained with sweat or water, or when a user wears gloves, leading to incorrect recognition of touch coordinates.
Innovation Solution
An electronic device with a first touch sensor to detect sensor information and a processor to determine the state of the touch object, adjusting touch sensitivity based on the analysis of sensor information to prevent malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a capacitive touch input method is used to recognize touch by determining a change in capacitance, then touch input can be detected, but the device malfunctions when the touch object is stained with sweat or water or when gloves are worn, leading to incorrect recognition of touch coordinates
Solution Approach 1:
The patent applies parameter changes by analyzing multiple sensor parameters (capacitance, resistance, infrared absorption, ultrasonic reflection) simultaneously and dynamically adjusting the threshold values for touch detection based on environmental conditions and touch object state. This allows the system to adapt to varying conditions such as sweat, water, or glove usage while maintaining accurate touch coordinate recognition.
Solution Approach 2:
The patent employs a composite sensing approach that combines multiple different sensing methods (capacitive, resistive, infrared, and ultrasonic sensors) into a unified touch detection system. This multi-modal composite approach allows the system to compensate for the limitations of individual sensing methods under adverse conditions, ensuring reliable touch input recognition regardless of sweat, water, or glove interference.
2Reliability
If the touch sensitivity is adjusted according to the state of the touch object, then ghost touches and incorrect recognitions are prevented, but additional sensor analysis and processing are required
Solution Approach 1:
The patent implements a universal processing framework that handles multiple sensor types (capacitive, resistive, infrared, ultrasonic) and multiple touch object states (dry, wet, gloved) through a single integrated analysis system. The processor applies unified algorithms that can interpret data from any sensor type and adapt to any touch condition, reducing the need for separate specialized processing paths for each sensor or condition.
Solution Approach 2:
The system employs feedback mechanisms where the analyzed sensor information about touch object state (such as detecting moisture or glove material) is fed back to dynamically adjust the touch sensitivity thresholds and detection parameters in real-time. This closed-loop feedback allows the system to automatically compensate for adverse conditions without requiring manual intervention or complex pre-programming for each scenario.
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 solution effectively prevents ghost touches and improves touch input accuracy by adjusting sensitivity according to the state of the touch object, ensuring reliable touch recognition even with moist or gloved conditions.
Implementation Method 1
a capacitive touch input method may recognize touch by determining a change in capacitance, which occurs by a conductive object, such as, for example, a user's finger or a stylus pen
Data Source
AI summary
A method and electronic device are provided. The electronic device includes a first touch sensor and a processor. The processor implements the method, which includes detecting, via a first touch sensor of the electronic device, sensor information from a touch object, determining, via a processor of the electronic device, a state of the touch object based on analysis of the detected sensor information, and adjusting a touch sensitivity for the electronic device according to the determined state of the object.