Proximity Sensor Automatic Calibration for Touch Screen Mode Switching
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Solution Overview
Problem
Touch screens on electronic devices fail to resume the active mode when the proximity sensor calibration is faulty or obstructed by grease, dust, or stains, leading to inconvenience as the device cannot properly switch from suspended to active mode.
Innovation Solution
An automatic calibration method for the proximity sensor that dynamically updates and recalculates the threshold value by resetting minimal and maximal indices based on sensor readings, ensuring accurate detection of near and far events to control the touch screen's activation and deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the proximity sensor uses a fixed threshold value for calibration, then the initial setup is simple, but the touch screen fails to resume active mode when calibration is faulty or obstructed by grease, dust, or stains
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed threshold value to a dynamically adjustable threshold. The calibration system continuously adapts the threshold based on real-time sensor readings during operation, allowing the system to respond to changes in sensor conditions (such as grease, dust, or stains) and ensure reliable mode switching throughout the device's usage lifecycle.
Solution Approach 2:
The patent implements parameter changes by modifying the threshold value parameter based on observed sensor behavior. The system monitors proximity sensor readings during actual use and adjusts the threshold parameter accordingly, transforming it from a static manufacturing parameter to a dynamic operational parameter that adapts to environmental conditions and sensor degradation.
2Adaptability or versatility
If the proximity sensor threshold is fixed during manufacturing, then manufacturing precision is maintained, but the sensor cannot adapt to obstructions like grease, dust, or stains that develop during use
Solution Approach 1:
The patent applies preliminary action by performing calibration adjustments during actual device operation rather than waiting for manufacturing completion. The system proactively monitors sensor readings and automatically adjusts thresholds in response to detected conditions, enabling the sensor to adapt to obstructions before they cause functional failures.
Solution Approach 2:
The calibration system implements self-service by automatically adjusting its own threshold parameters based on sensor readings during operation. The system monitors its own performance and performs self-calibration without requiring external intervention, manufacturing rework, or user manual adjustment, thereby maintaining measurement precision despite environmental obstructions.
3Reliability
If manual calibration adjustment is required for each sensor issue, then measurement precision can be maintained, but user convenience and operation ease are reduced
Solution Approach 1:
The patent implements self-service through automatic calibration adjustment during device operation. The system autonomously monitors proximity sensor readings, detects when threshold adjustment is needed, and modifies the threshold parameter without requiring user intervention. This maintains sensor reliability while preserving ease of operation, as users experience no additional steps or manual calibration tasks.
Solution Approach 2:
The patent applies feedback by continuously monitoring proximity sensor readings during device operation and using this information to automatically adjust the threshold. The system establishes a feedback loop where sensor performance data informs real-time parameter adjustment, enabling automatic adaptation to changing conditions while maintaining both reliability and ease of operation.
Data Source
AI summary
An automatic calibration method suitable for an electronic apparatus comprising a proximity sensor is disclosed. The automatic calibration method includes steps of: resetting data comprising a minimal index and a maximal index when a specific function is activated; updating the minimal index and the maximal index according to readings from the proximity sensor; resetting the minimal index when the proximity sensor detects a far event according to a threshold value of the proximity sensor; resetting the maximal index when the proximity sensor detects a near event according to the threshold value; and, re-calculating the threshold value according to the minimal index or the maximal index every time the minimal index or the maximal index is updated.