Pocket Mode Screen Control Using Quaternion Attitude Detection
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Solution Overview
Problem
Accidental touches on touchscreen terminals placed in backpacks or pockets lead to high power consumption, fingerprint lock issues, password lockouts, and false alarms due to incorrect inputs, severely affecting user experience.
Innovation Solution
A method using a quaternion derived from an acceleration sensor and gyro sensor to determine the terminal's attitude, combined with ambient light and motion information, to identify a head-down pocket mode and automatically switch the screen off, preventing accidental touches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal screen remains on to allow user interaction, then user accessibility is improved, but power consumption increases and accidental touches occur when placed in backpacks or pockets
Solution Approach 1:
The patent applies dynamics by making the screen state adjustable between on and off based on detected usage scenarios. The system dynamically transitions the screen to an off state when pocket mode is detected (using acceleration sensor, gyro sensor, and ambient light sensor data), and transitions to on state when user interaction is detected, thereby optimizing both power consumption and user accessibility.
Solution Approach 2:
The patent changes the screen state parameter based on detected environmental and motion parameters. When the acceleration sensor detects specific motion patterns and the ambient light sensor detects low light levels (indicating pocket storage), the screen parameter is changed to off state. This resolves the contradiction by adapting the screen state to actual usage conditions.
2Loss of information
If the terminal screen remains on to display information, then information availability is improved, but the terminal is susceptible to accidental touches causing false alarms and lockouts
Solution Approach 1:
The patent applies preliminary action by detecting pocket mode conditions (using combination of sensor data) before the terminal is subjected to accidental touches. When the acceleration sensor, gyro sensor, and ambient light sensor indicate the terminal is in a pocket, the screen is proactively turned off to prevent accidental touches from triggering false alarms or lockouts, while maintaining information availability when needed.
Solution Approach 2:
The patent uses sensor data (acceleration, gyro, ambient light) as intermediaries to determine whether the terminal is in a pocket. These sensor readings act as mediators between the physical state of the terminal and the screen state, enabling reliable differentiation between pocket storage and active usage scenarios to prevent accidental touches.
3Measurement precision
If multiple sensors are used to detect pocket mode, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple sensor functions (acceleration sensor, gyro sensor, ambient light sensor) into a unified pocket mode detection system. By combining the data from these sensors and processing them together to determine pocket mode status, the system achieves high detection accuracy while managing complexity through integrated processing rather than separate independent systems.
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
Effectively reduces power consumption and prevents accidental touches, maintaining the terminal in a screen-off state to enhance user experience by avoiding unnecessary screen activations.
Implementation Method 1
obtaining a quaternion of a terminal by using an acceleration sensor and a gyro sensor, where the quaternion is used to represent an attitude of the terminal
Implementation Method 2
detecting motion information of the terminal by using the acceleration sensor, where the motion information is used to identify a motion status of the terminal
Implementation Method 3
detecting ambient light information of the terminal by using an ambient light sensor, where the ambient light information is used to identify light intensity of an environment in which the terminal is located
Data Source
AI summary
Disclosed are a method and an apparatus for preventing an accidental touch, applied to the field of terminal technologies. The method includes: obtaining a quaternion of a terminal; determining, based on the quaternion of the terminal, first information and attitude angle information of the terminal; detecting motion information of the terminal; detecting ambient light information of the terminal; determining, based on the first information, the attitude angle information, the motion information, and the ambient light information, that the terminal is in a first mode; and entering, by the terminal, a screen-off state to reduce power consumption. In addition, the terminal can be prevented from being awakened accidentally in always on display and lock screen-on states, thereby effectively preventing an accidental touch.