Proximity Sensor Dual Detection Zones for False Boot-Up Prevention
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Solution Overview
Problem
Existing electronic apparatuses using proximity sensors to detect user presence often boot up unnecessarily due to accidental detection of non-users and may incorrectly detect a user's leave, leading to security and power consumption issues.
Innovation Solution
The apparatus employs a dual detection system with different detection angles and distances to distinguish between user approach and leave, using a first detection control unit for a wider angle and longer distance in leave detection mode and a second unit for a narrower angle and shorter distance in approach detection mode, allowing for precise control of system states based on user presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a proximity sensor is used to detect the approach of a person, then the electronic apparatus can boot up automatically, but it may boot up unnecessarily when a non-user cuts across in front of the apparatus
Solution Approach 1:
The detection range is divided into multiple zones with different detection characteristics. A first detection zone uses a first detection angle of view and first detection distance for approach detection, while a second detection zone uses a second detection angle of view and second detection distance for leave detection. This segmentation allows the system to distinguish between users approaching the apparatus and non-users passing by, reducing false boot-ups while maintaining automatic boot-up functionality.
2Loss of energy
If the detection range is extended to detect user leave, then the apparatus can transition to standby state, but it may erroneously detect leave when the user moves freely
Solution Approach 1:
Different detection parameters are applied to different spatial zones. The first detection zone (for approach) uses a first detection angle of view and first detection distance, while the second detection zone (for leave) uses a second detection angle of view and second detection distance. This local differentiation ensures that the apparatus reliably detects when a user actually leaves versus when they merely move freely within the detection area, preventing erroneous standby transitions while enabling energy-saving shutdowns.
3Device complexity
If a single detection angle and distance are used, then the detection system is simple, but it cannot reliably distinguish between user approach and leave
Solution Approach 1:
The detection system dynamically switches between different detection parameters based on the detection task. When detecting user approach, the system uses the first detection angle of view and first detection distance. When detecting user leave, the system uses the second detection angle of view and second detection distance. This dynamic adaptation of detection parameters allows the system to maintain high measurement precision for both approach and leave detection while keeping the overall system design relatively simple.
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 solution enhances the reliability of detecting user presence and absence, preventing unnecessary boot-ups and optimizing power consumption by accurately differentiating between user interactions and accidental detections.
Implementation Method 1
As the proximity sensor, for example, an infrared (IR) sensor is used
Data Source
AI summary
An electronic apparatus includes: a processing unit; a detection sensor which detects the motion from an object within a detection range defined by predetermined detection angle of view and detection distance, and outputs a detection signal; a first detection control unit which outputs first information based on a detection signal corresponding to a first detection angle of view; and a second detection control unit which sets a second detection angle of view different from the first detection angle of view, acquires second information based on a detection signal corresponding to the second detection angle of view, and outputs the second information to the processing unit, wherein the processing unit sets respective detection distances of the first information and the second information to a first detection distance and a second detection distance to make conditions related to the detection distance different between the first information and the second information.