Touch Detection Device Multi-Object Force Differentiation
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Solution Overview
Problem
Current touch detection devices cannot accurately detect the pressing forces of multiple objects on a touch panel's input surface, as they are designed to detect forces applied by a single object and fail to differentiate between different objects pressing on separate regions.
Innovation Solution
A touch detection device comprising multiple first detectors for contact signals, at least one second detector for force signals, and a controller that calculates the forces applied by multiple detection targets based on the first and second signal values, using reference values from the first regions to determine the forces applied by each object on the second regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a touch panel uses a single detector per region to detect force, then the device complexity is reduced, but the measurement precision of multiple objects' forces deteriorates
Solution Approach 1:
The touch panel divides each physical region into multiple virtual sub-regions (first regions and second regions) that can be independently detected. This segmentation allows the single detector to differentiate forces from multiple objects by calculating the difference between forces detected in corresponding first and second regions, thereby improving measurement precision without increasing device complexity.
2Adaptability or versatility
If the touch panel detects forces from multiple objects simultaneously, then the functionality is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The system performs preliminary detection by first measuring the force in the first region, then measuring the force in the corresponding second region, and finally calculating the difference. This step-by-step preliminary action simplifies the measurement process by breaking down the complex multi-object detection into manageable sequential steps, reducing the difficulty of detection and measurement.
3Measurement precision
If the touch panel uses multiple detectors to detect forces from multiple objects, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The single detector is designed to perform multiple functions: detecting force in the first region, detecting force in the second region, and calculating the difference between them. This multi-functionality allows the detector to achieve high measurement precision for multiple objects without requiring multiple separate detectors, thereby avoiding increased device complexity.
Data Source
AI summary
According to an aspect, a touch detection device includes: first detectors that output first signal values corresponding to contact of detection target objects with first regions; at least one second detector that outputs at least one second signal value corresponding to at least one first force applied by the detection target objects to press at least one second region corresponding to the first regions; and a controller that calculates at least one third signal value corresponding to at least one second force applied by at least one of the detection target objects to the at least one second region, based on the first signal values, the at least one second signal value, and at least one reference value corresponding to a third force per at least one of the first signal values.