Wearable Display Screen Control Using Height and Acceleration Sensors
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Solution Overview
Problem
Wearable devices inaccurately identify wrist raise movements, leading to unnecessary power consumption by turning on the display screen due to incorrect acceleration sensor readings from arm swings during activities like jogging.
Innovation Solution
Implementing a method that uses both height difference and acceleration sensors to accurately determine a wrist raise movement by setting thresholds for height and acceleration, ensuring the display screen only turns on when a predetermined movement is confirmed, thereby reducing power wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only acceleration sensor is used to detect wrist raise movement, then the device complexity is low, but the measurement precision deteriorates causing false detection during arm swing activities
Solution Approach 1:
The patent combines height sensor and acceleration sensor into an integrated detection system. The height sensor detects vertical position changes while the acceleration sensor detects motion intensity, and their data is fused to accurately distinguish wrist raise movements from arm swing activities, resolving the false detection problem without significantly increasing system complexity
Solution Approach 2:
The detection system is designed to serve multiple functions: detecting both wrist raise movements and arm swing activities using the same sensor combination. By analyzing different patterns of height and acceleration data, the system can identify different movement types, making the detection mechanism universally applicable to various motion scenarios
2Reliability
If acceleration threshold is set low to detect all movements, then the ease of operation improves, but the reliability deteriorates due to false triggering during jogging and arm swing
Solution Approach 1:
The system uses feedback from both height sensor and acceleration sensor to continuously monitor and adjust movement detection. By comparing real-time data from both sensors against established patterns, the system can reliably distinguish between intentional wrist raises and unintentional arm swings, maintaining high detection reliability while preserving automatic activation convenience
Solution Approach 2:
The patent changes the detection parameters by introducing height change as an additional criterion alongside acceleration. This parameter change allows the system to differentiate between movements with similar acceleration but different vertical displacement patterns, thereby improving reliability without requiring overly sensitive acceleration thresholds that would cause false triggering
3Use of energy by moving object
If display screen turns on frequently due to incorrect detection, then the ease of operation improves for information access, but the use of energy deteriorates due to unnecessary power consumption
Solution Approach 1:
The system performs preliminary analysis of movement patterns using both height and acceleration data before triggering the display screen. By pre-evaluating whether a detected movement matches the wrist raise pattern, the system avoids unnecessary display activations during arm swing activities, thereby reducing power consumption while maintaining accurate movement identification
Solution Approach 2:
The patent replaces reliance on a single mechanical sensor (acceleration sensor) with a combined sensing approach that includes height measurement. This substitution provides more comprehensive physical data about the movement, enabling more accurate distinction between wrist raises and arm swings, thus reducing false display activations and associated power consumption
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 enhances the accuracy of identifying wrist raise movements, minimizing power consumption by preventing incorrect activations of the display screen during activities that mimic wrist raise actions.
Implementation Method 1
obtain, by using the acceleration sensor, acceleration generated when moving from one position to another position
Implementation Method 2
obtain, by using the height sensor, height at one position and another position
Data Source
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AI summary
Embodiments of the present invention disclose a display screen control method and apparatus, and a terminal, and relate to the field of communications technologies, so as to reduce power consumption caused by a wearable device turning on a display screen due to incorrect identification of a wrist raise movement characteristic. The method in the embodiments of the present invention includes: obtaining a height difference and an acceleration that are generated when a terminal moves from an initial position to a target position; determining, according to the height difference and the acceleration, whether a first predetermined movement is satisfied; and when the first predetermined movement is satisfied, triggering the terminal to turn on a display screen. The present invention is applied to a terminal.