Dual Touchscreen Calibration Map Switching for Valid Touch Sensing
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Solution Overview
Problem
Dual touchscreen devices face challenges in performing valid run-time calibrations due to conditions that render the calibrations invalid, leading to inaccurate detection of touch inputs.
Innovation Solution
A computing device with dual display devices and capacitive touch sensors performs run-time calibrations to generate calculated calibration maps, and a processor detects replacement conditions to switch between valid calibration maps, ensuring accurate touch input detection by replacing invalid maps with valid ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If run-time calibration is performed on both touchscreens, then touch input detection accuracy is improved, but calibration validity deteriorates under adverse conditions
Solution Approach 1:
The system performs validation on calculated calibration maps to determine whether they meet predetermined validity criteria. Based on this validation feedback, the system decides whether to replace existing calibration maps or retain them, ensuring that only valid calibrations are applied to maintain reliable touch input detection
Solution Approach 2:
The system performs validation checks on calibration maps before applying them to the touchscreens. By preliminarily assessing whether calibration maps meet validity criteria before use, the system prevents invalid calibrations from compromising touch input detection reliability
2Measurement precision
If calibration maps are continuously updated, then touch input detection accuracy is improved, but system complexity increases
Solution Approach 1:
The validation process provides feedback on whether calculated calibration maps meet predetermined criteria, enabling automated decision-making about whether to replace existing calibration maps. This feedback mechanism simplifies calibration management by eliminating manual intervention while maintaining accuracy
Solution Approach 2:
The system autonomously manages calibration map updates by automatically validating calculated maps against validity criteria and performing replacements when appropriate. This self-service approach handles calibration complexity internally without requiring external intervention, maintaining simplicity for the user
Data Source
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AI summary
A computing device is provided. The computing device comprises a first display device having a first capacitive touch sensor having a first current calibration map. The computing device further comprises a second display device having a second capacitive touch sensor. The computing device further comprises a processor configured to perform a first run-time calibration on the first capacitive touch sensor to generate a first calculated calibration map. The processor is further configured to perform a second run-time calibration on the second capacitive touch sensor to generate a second calculated calibration map. The processor is further configured to detect a replacement condition for the first calculated calibration map and replace the first current calibration map with the second calculated calibration map, such that the second calculated calibration map is utilized for the first capacitive touch sensor of the first display device.