Dual Sensor Scan Control for High-Speed Tracking
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Solution Overview
Problem
In electronic apparatuses with sensor units, the large detection area required for accurate indication input, especially when combining main and peripheral input units, hinders size reduction and leads to issues with detecting high-speed object movement and preventing malfunctions due to incorrect detection in overlapping regions.
Innovation Solution
The implementation of a dual sensor unit system where a first sensor unit detects the main indication input and a second sensor unit, positioned close to the first, controls the scan operation to perform local or near-area scans when the indicating object is detected in the second unit, preventing malfunctions and ensuring accurate detection even at high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all transparent conductors are scanned to detect the indicating object, then detection coverage is improved, but detection speed decreases
Solution Approach 1:
The sensor unit is divided into multiple regions with different scan priorities. The detection region is segmented from the non-detection region, allowing the system to perform scans selectively based on where the indicating object is most likely to be, thus improving detection speed while maintaining adequate coverage.
Solution Approach 2:
The scan operation is made dynamic by adjusting scan frequency and depth based on detected object movement. When an object is detected moving at high speed, the system increases scan frequency in the movement direction to maintain tracking, while reducing scans in other areas.
2Measurement precision
If the detection region is expanded to cover peripheral indication input units, then detection coverage is improved, but apparatus size increases
Solution Approach 1:
The sensor unit is designed with multi-functionality to serve both the main display region and peripheral button regions. By making the sensor unit universal across different input areas, the patent avoids adding separate detection systems, thereby preventing apparatus size increase while maintaining comprehensive detection coverage.
Solution Approach 2:
The detection regions for the main display and peripheral buttons are merged into a single continuous sensor unit. This combining approach allows the system to detect indicating objects across the entire surface without requiring additional separate components, thus avoiding size increase.
3Speed
If scan frequency is increased to track high-speed movement, then detection speed is improved, but energy consumption increases
Solution Approach 1:
The scan frequency is dynamically adjusted based on the detected movement speed of the indicating object. When high-speed movement is detected, the system increases scan frequency in the movement direction to maintain tracking accuracy. When movement is slow or stationary, scan frequency is reduced, thereby lowering energy consumption.
Solution Approach 2:
Different scan frequencies are applied to different regions based on local requirements. Areas where high-speed movement is detected receive higher scan frequencies, while other regions maintain lower scan frequencies, optimizing energy consumption while ensuring tracking performance where 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 configuration allows for reduced apparatus size, improved detection speed, and prevention of malfunctions by controlling scan operations between sensor units, ensuring accurate tracking of indicating objects across different input regions.
Implementation Method 1
search for the transparent conductor whose capacitance changes on the basis of indication by the indicating object
Data Source
AI summary
Disclosed is an electronic apparatus including: a first sensor having a first indication input surface for detecting a position indicated by an indicating object; a second sensor having a second indication input surface for detecting the indicating object, the second indication input surface being disposed adjacent to the first indication input surface of the first sensor in a direction along a surface direction of the first indication input surface; and a controller which, in operation, controls a scan operation for detecting the position indicated by the indicating object in the first indication input surface of the first sensor when the indicating object is detected in the second sensor.