Capacitive Sensing Sub-region Input Suppression
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Solution Overview
Problem
Existing proximity sensor devices face challenges in accurately distinguishing and suppressing input objects within specific sub-regions of a sensing area, leading to potential erroneous reporting, especially when objects are initially placed in regions where suppression is intended, without relying on temporal determinations.
Innovation Solution
A processing system for capacitive sensing devices that includes a sensor module and a determination module, capable of detecting input objects and determining their positional information to identify sub-regions, thereby suppressing the reporting of input objects immediately upon initial placement in specific sub-regions, without considering time limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temporal determination methods are used to suppress input objects, then false positives can be reduced, but response time increases and real-time accuracy deteriorates
Solution Approach 1:
The sensing region is divided into multiple sub-regions, with different suppression rules applied to each sub-region. This segmentation allows immediate spatial-based suppression in certain areas without requiring temporal analysis, thus reducing response time while maintaining accuracy where spatial classification is sufficient.
Solution Approach 2:
Different sub-regions of the sensing area are assigned different qualities or characteristics. Objects in specific sub-regions are immediately suppressed based on their location, while objects in other sub-regions undergo temporal analysis. This local differentiation optimizes both response time and accuracy based on position-specific requirements.
2Reliability
If all input objects are reported without suppression, then detection completeness is improved, but erroneous reporting increases
Solution Approach 1:
The sensing region is segmented into sub-regions with different reporting rules. Objects detected in certain sub-regions are immediately suppressed and not reported, while objects in other sub-regions are reported after temporal analysis. This segmentation reduces erroneous reporting in specific areas while maintaining detection completeness elsewhere.
Solution Approach 2:
The reporting parameter is changed based on the object's spatial location. Instead of a uniform reporting rule, the system dynamically adjusts whether to report an object based on which sub-region it occupies, thereby reducing erroneous reports in problematic areas while preserving complete detection in areas where suppression is not needed.
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 suppresses input objects in designated sub-regions, reducing erroneous reporting and improving the accuracy of input detection by immediately identifying and ignoring unwanted inputs, such as those from gripping the device, thereby enhancing the functionality of electronic systems.
Implementation Method 1
The sensor module is for performing capacitive sensing in a sensing region using sensor electrodes
Data Source
AI summary
A processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module is for performing capacitive sensing in a sensing region using sensor electrodes. The sensing region includes a first sub-region and a second sub-region. The determination module is for detecting a first input object in the sensing region upon an initial contact of the first input object in the sensing region, determining positional information of the first input object, and determining, from the positional information, that the first input object is located in the second sub-region of the sensing region. Responsive to the first input object being located in the second sub-region of the sensing region, the determination module suppresses reporting of the first input object.