Glove Touch Detection Mode Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch screens often fail to detect gloved fingers due to the non-conductive barrier, leading to incorrect touch threshold settings that can result in false positives or failures to register intended touches, necessitating a dynamic adjustment of touch detection thresholds based on user interaction modes.
Innovation Solution
The electronic device transitions between bare finger and glove touch detection modes by analyzing the signal density slope over time, using a finite state machine to determine when to switch between thresholds, ensuring accurate touch detection regardless of whether the user is wearing gloves or not.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed high touch detection threshold is used to prevent false positives, then false positive rate decreases, but gloved finger touch detection capability deteriorates
Solution Approach 1:
The patent implements dynamic threshold adjustment by transitioning between bare finger touch detection mode and glove touch detection mode based on detected touch patterns. The system dynamically changes the touch detection threshold: using a higher threshold in bare finger mode to prevent false positives, and a lower threshold in glove mode to ensure detection of gloved touches that produce weaker signals.
Solution Approach 2:
The system changes the touch detection threshold parameter based on the detected operation mode. When a gloved finger touch pattern is detected (characterized by specific slope criteria of signal density over time), the system switches from bare finger threshold to glove threshold, thereby adjusting the parameter to match the current usage scenario and improve detection accuracy.
2Measurement precision
If a fixed low touch detection threshold is used to detect gloved fingers, then gloved finger touch detection capability improves, but false positive rate increases
Solution Approach 1:
The system dynamically adjusts the touch detection threshold based on the current mode. When operating in bare finger mode, a higher threshold is applied to maintain reliability and prevent false positives. Upon detecting a transition to glove mode (through slope analysis of signal density), the system switches to a lower threshold to improve detection sensitivity for gloved touches.
Solution Approach 2:
The touch detection threshold parameter is changed based on the operation mode. In bare finger mode, the threshold is set higher to reduce false positives. When glove mode is detected through analysis of touch signal density slopes, the threshold parameter is lowered to enable proper detection of the weaker signals produced by gloved fingers.
3Measurement precision
If touch detection threshold is dynamically adjusted between modes, then touch detection accuracy for both bare finger and gloved finger improves, but system complexity increases
Solution Approach 1:
The patent segments the touch detection operation into distinct modes (bare finger mode and glove mode), each with its own optimized threshold. This segmentation allows the system to apply simple, mode-specific thresholds rather than attempting to use a single complex adaptive algorithm, thereby managing system complexity while maintaining high detection accuracy for both scenarios.
Solution Approach 2:
The system automatically detects the operation mode through analysis of touch signal density slopes and self-adjusts the threshold accordingly without requiring manual user input or complex external control. The finite state machine autonomously transitions between modes based on detected touch patterns, reducing the need for complex user interface elements or manual configuration.
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 approach allows for reliable touch detection in both bare finger and gloved finger scenarios, preventing false positives and ensuring intended touches are registered correctly, enhancing user interaction with touch screens.
Implementation Method 1
Capacitive touch sensor panels can be formed by a matrix of transparent, semi-transparent or non-transparent conductive plates
Implementation Method 2
in some capacitive-type touch sensing systems, fringing electrical fields used to detect touch can extend beyond the surface of the display
Data Source
AI summary
An electronic device including a touch screen or touch sensor panel can operate in a bare finger touch detection mode or a glove touch detection mode. While operating in the bare finger touch detection mode, in response to detecting a signal density slope corresponding to a gloved object touching the panel and lifting off without re-approaching the panel within a predetermined time or in response to detecting a signal density slope corresponding to a gloved object touching the panel continuously for a predetermined period of time, the electronic device can transition from the bare finger mode to the glove touch mode, for example. While in the glove touch detection mode, the electronic device can transition to the bare finger touch detection mode in response to detecting a touch signal density that exceeds a predetermined threshold or in response to detecting a touch signal that exceeds a predetermined threshold.