Noncontact Sensor Coordinate Correction for Angled Approach
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Solution Overview
Problem
Conventional noncontact sensor systems face challenges in accurately detecting the position of a detection target due to errors in coordinate detection, especially when the target approaches the sensor module at an angle or with abrupt movements, leading to incorrect input recognition.
Innovation Solution
The sensor system incorporates a noncontact sensor module mounted on a display device, with a processor that calculates move information and correction amounts based on detected coordinates. This allows for accurate detection and correction of target positions, even when approaching at angles or with abrupt movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If noncontact sensor module is used to detect target position, then input operation can be performed without contact, but coordinate detection errors occur when target approaches at angle or with abrupt movements
Solution Approach 1:
The system performs preliminary detection of the detection target's approach trajectory by comparing first coordinates (detected before) with second coordinates (detected currently). Based on this preliminary trajectory analysis, the system calculates a correction amount to compensate for detection errors before final coordinate determination, ensuring accurate input recognition even during angled or abrupt movements
Solution Approach 2:
The system implements a feedback mechanism where the detected coordinate information is continuously processed to calculate correction amounts. The correction amount is derived from the relationship between sequential coordinate detections and the target's approach trajectory, creating a closed-loop system that automatically adjusts for detection errors in real-time
2Measurement precision
If correction amount is calculated based on move information, then coordinate detection accuracy is improved, but calculation complexity increases
Solution Approach 1:
The system applies correction selectively based on detection conditions. Correction amounts are calculated and applied when the detection target is approaching the sensor module, while skipping correction calculations when the target is moving away or in stable positions. This partial application of correction reduces unnecessary computational overhead while maintaining detection accuracy where needed
Data Source
AI summary
A sensor system according to an embodiment includes: a noncontact sensor module arranged on a display module; and a processor configured to drive the sensor module, wherein the sensor module is configured to detect a first coordinate and a second coordinate of a detection target, the second coordinate is detected before the first coordinate is detected, the processor is configured to calculate move information indicating a moving direction of the detection target in the first coordinate based on the first coordinate and the second coordinate detected by the sensor module, and calculate a correction amount in the first coordinate based on the move information when the detection target approaches the sensor module and a distance between the sensor module and the detection target reaches a correction start distance.