Position Detection Device Input Validation via Motion Analysis
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Solution Overview
Problem
Existing position detection devices and methods struggle to accurately differentiate intended operations from unintended ones, particularly in multi-user scenarios and when multiple targets are present, leading to potential misinterpretation of input operations.
Innovation Solution
A position detection device and method that incorporates a detecting section, an imaging section, and a control section to differentiate between intended and unintended operations by analyzing the motion and position of targets relative to an operation surface, using captured images to determine the validity of input operations based on speed, frequency, and distance criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion detection based on captured images is added to determine input validity, then the accuracy of detecting intended operations is improved, but the device complexity increases
Solution Approach 1:
The patent combines the imaging section (camera) with the existing position detection functionality. The control section integrates both the detection of target positions from the detecting section and motion analysis from the imaging section into a unified input validation mechanism. This merging allows the system to use existing components for multiple purposes, improving detection accuracy without proportionally increasing device complexity.
Solution Approach 2:
The imaging section serves multiple functions: it captures images for motion detection, provides visual feedback for user interaction, and helps distinguish between intentional inputs and unintended operations. By making the imaging component multi-functional, the patent improves measurement precision without requiring entirely separate systems for each function, thereby limiting the increase in device complexity.
2Reliability
If multiple detection methods (detecting section and imaging section) are used to differentiate intended operations, then the reliability of input detection is improved, but the device complexity increases
Solution Approach 1:
The control section continuously compares information from the detecting section (target position) with information from the imaging section (motion in captured images). This feedback mechanism allows the system to validate whether detected positions correspond to intentional user actions by analyzing motion patterns, thereby improving reliability. The feedback is processed through existing control logic, limiting the increase in device complexity.
Solution Approach 2:
The system performs preliminary motion detection using the imaging section before finalizing input detection. By analyzing captured images to determine if motion corresponds to an intentional operation, the system pre-validates inputs before they are processed as commands. This preliminary action improves reliability by filtering out unintended operations early, while the preprocessing nature of this validation limits additional complexity.
Data Source
AI summary
A position detection device capable of preventing an operation that is not intended by an operator from being detected as an input is provided. The position detection device includes: a detecting section that detects an indicator that performs an operation with respect to a screen, and a target different from the indicator; an imaging section that images a range including the screen to form a captured image; and a control section that detects a motion of the indicator based on data on the captured image of the imaging section to determine whether or not to detect an operation based on the indicator as an input.