Gesture Sensor Light Threshold Control
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Solution Overview
Problem
Optical gesture sensors often malfunction due to receiving unwanted light reflections from their surroundings, leading to errors in detecting object presence or movement.
Innovation Solution
A method and apparatus that dynamically set a light amount threshold for the gesture sensor based on real-time measurements and environmental conditions, using a threshold determining module to adjust the recognition threshold by adding a weight value to the light amount measurement, thereby minimizing false positives and negatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed light amount threshold is used for object detection, then the device complexity is reduced, but the measurement precision deteriorates in varying environmental conditions
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed threshold to a dynamically adjusted threshold. The threshold determining module continuously adapts the light amount threshold based on real-time light amount measurements and environmental conditions, allowing the system to maintain high measurement precision across varying environments without requiring complex manual configuration.
Solution Approach 2:
The patent implements feedback through a closed-loop system where light amount measurements are continuously monitored and fed back to the threshold determining module. This feedback mechanism enables the threshold to be automatically adjusted based on actual sensor readings and environmental factors, resolving the contradiction between simplicity and precision.
2Reliability
If the light amount threshold is set high to avoid false positives, then the reliability improves, but the measurement precision deteriorates by missing actual objects
Solution Approach 1:
The patent applies parameter changes by dynamically modifying the light amount threshold parameter based on environmental conditions and real-time measurements. The threshold determining module adjusts the threshold value adaptively, increasing it when environmental light is high to reduce false positives, while decreasing it when needed to maintain sensitivity for actual objects, thus balancing reliability and precision.
Solution Approach 2:
The system dynamically adjusts the threshold parameter in response to changing environmental conditions. The threshold is not static but evolves based on real-time light amount measurements, allowing the system to maintain both high reliability (by avoiding false positives) and high precision (by detecting actual objects) simultaneously.
3Measurement precision
If the light amount threshold is set low to detect all objects, then the measurement precision improves, but the reliability deteriorates due to false positives from environmental light
Solution Approach 1:
The patent implements parameter changes by adaptively adjusting the light amount threshold based on environmental light conditions. When environmental light is low, the threshold is decreased to maximize detection sensitivity. When environmental light is high, the threshold is increased to minimize false positives from ambient light, thus maintaining both precision and reliability across different conditions.
Solution Approach 2:
The system dynamically adjusts the detection threshold parameter in response to environmental conditions. This dynamic adaptation allows the sensor to maintain high sensitivity for detecting actual objects while simultaneously reducing false positives caused by environmental light variations, resolving the contradiction between precision and reliability.
4Ease of manufacture
If a fixed threshold is used during manufacturing, then the ease of manufacture improves, but the adaptability deteriorates for different usage environments
Solution Approach 1:
The patent applies dynamics by creating a system that automatically adapts to different environments without requiring complex manufacturing adjustments. The threshold determining module enables the sensor to self-adjust to various usage conditions, maintaining ease of manufacture while achieving high environmental adaptability through software-based dynamic threshold adjustment.
Solution Approach 2:
The patent implements universality by creating a single sensor design that can function effectively across multiple environmental conditions. The dynamic threshold adjustment mechanism allows the same hardware to adapt to different usage scenarios, eliminating the need for environment-specific manufacturing variants while maintaining high adaptability.
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
Prevents sensor malfunctions by accurately determining object presence within effective distances, even in varying environments, and reduces manufacturing defects by setting light thresholds appropriately.
Implementation Method 1
The light emitted by the emitter is reflected off an object and the light-receiver receives the light reflected off the object. According to the amount of the light received by the light-receiver, that is, the amount of the reflected light, the presence or movement of an object in a certain distance may be determined.
Implementation Method 2
Generally, the light-receiver is a photo-diode and the emitter is a Light-Emitting Diode (LED).
Data Source
AI summary
An electronic device and a method for controlling a gesture sensor of the same are provided. The electronic device includes a gesture sensor and a threshold determining module configured to receive a light amount measurement with respect to light incident to the gesture sensor, to compare the light amount measurement with a light amount reference value, and to determine a light amount threshold that is used based on object recognition of the gesture sensor by adding the weight value to the light amount measurement.