Linear IR Sensor Position Correction for Hand Shape Variations
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Solution Overview
Problem
Conventional optical sensor technologies face inaccuracies in detecting the position of a finger approaching a screen due to variations in hand shape and direction, which are not adequately addressed by existing correction methods.
Innovation Solution
A method and apparatus that utilize a linear IR sensor to detect the position of an object approaching a display screen by resetting a preset offset value based on the detection region, displaying ghost menu icons for calibration, and adjusting the offset value based on user selection, thereby correcting the detected position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical sensor technology is used to detect finger position, then the detection process is simple, but the measurement precision deteriorates due to variations in hand shape and direction
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the offset value based on the detected direction of the finger. The system calculates the angle of approach and modifies the position detection parameters accordingly, transforming a static detection system into a dynamic one that adapts to different hand shapes and directions, thereby improving measurement precision without significantly increasing device complexity
Solution Approach 2:
The patent implements preliminary action by pre-calculating offset values for different detection regions and directions. Before actual position detection, the system establishes a correction map that accounts for various hand shapes and approaches, allowing rapid compensation during operation without real-time complex calculations, thus improving precision while maintaining system simplicity
2Adaptability or versatility
If a fixed offset value is used for position correction, then the device complexity is low, but the adaptability deteriorates when different users with various hand shapes operate the screen
Solution Approach 1:
The patent applies dynamics by making the offset value dynamic rather than fixed. The system continuously adjusts the offset based on the detected finger approach direction and detection region, allowing the correction parameter to adapt in real-time to different users and hand shapes. This dynamic adjustment mechanism provides high adaptability while maintaining relatively simple device complexity through algorithmic flexibility
Solution Approach 2:
The patent implements segmentation by dividing the detection area into multiple regions and assigning different offset values to each region based on the direction of approach. This segmented approach allows the system to handle different hand shapes and directions with region-specific corrections, improving adaptability without requiring a completely complex system architecture
3Reliability
If numerical calculation methods are used to calculate correction values, then the processing speed is fast, but the reliability deteriorates because verification of correction accuracy is not performed
Solution Approach 1:
The patent applies feedback by implementing a verification mechanism that checks whether the corrected position falls within a valid range or corresponds to expected interaction patterns. The system provides feedback on correction accuracy and can adjust or reject corrections that fail verification, thereby improving reliability. The feedback loop is designed to be efficient, minimizing time loss through smart validation rules rather than exhaustive verification
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 approach automatically corrects errors in position detection, accurately measures finger positions based on hand shape, and adapts to different users operating a touch screen, including drivers and passengers in vehicles.
Implementation Method 1
a sensor having a sensing element linearly disposed in parallel with the display
Implementation Method 2
detecting the position of an object by generating light and measuring the time taken to emit and reflect the light
Data Source
AI summary
A method and apparatus for detecting including: resetting a preset offset value based on a detection region in which an object approaching a display is first detected among a plurality of detection regions predetermined by a sensor having a sensing element linearly disposed in parallel with the display; displaying at least one ghost menu icon around an original menu icon on the display screen by determining whether a calibration mode is ON; determining whether the ghost menu icon has been selected by a user; increasing or decreasing, when the ghost menu icon is selected by the user, the reset offset value based on the a position of the selected ghost menu; and correcting a position of an object detected by the sensor based on the increased or decreased offset value.