Screen Auto-Rotation Using Face Direction in Side-Lying Use
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Solution Overview
Problem
The 'auto-rotate screen' function in electronic devices sometimes fails to meet user expectations by incorrectly rotating the screen display direction, particularly when a user lies on their side, as it relies solely on physical sensors like accelerometers and gyroscopes.
Innovation Solution
The method determines the screen display direction based on both gravity and face direction, using a front camera to recognize the user's orientation and adjust the screen display accordingly, ensuring it aligns with the user's face direction when in a landscape side-standing state, and switches to gravity-based detection when not in that state to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the electronic device uses physical sensors (accelerometer and gyroscope) to determine screen rotation, then the device can automatically switch between portrait and landscape display, but the screen may rotate incorrectly when the user lies on their side
Solution Approach 1:
The patent combines physical sensor detection (accelerometer and gyroscope) with visual detection (front camera face recognition) to determine screen rotation state. This multi-modal approach merges the advantages of both methods: physical sensors provide continuous orientation data while face recognition provides contextual understanding of user position, thereby resolving the contradiction between automation and reliability.
Solution Approach 2:
The patent introduces face recognition technology as an intermediary to mediate between physical sensor data and screen rotation control. When the user lies on their side, the face recognition system detects the face orientation and provides corrective information to prevent incorrect screen rotation, acting as a mediator that resolves the conflict between sensor-based automation and actual user intent.
2Reliability
If the electronic device continuously uses the front camera to recognize face direction for screen rotation, then the screen display aligns with user face direction, but power consumption increases
Solution Approach 1:
The patent implements periodic action by triggering front camera-based face direction recognition only under specific conditions: when the device is in landscape side-standing state and physical sensors indicate potential rotation. This conditional periodic activation reduces power consumption compared to continuous camera operation, while maintaining reliable screen alignment when needed.
Solution Approach 2:
The patent applies dynamics by making the detection method adaptive: the system dynamically switches between relying on physical sensors alone, or combining with face recognition based on the detected device state. When the device is in landscape side-standing state, face recognition is activated; otherwise, the system relies on physical sensors, creating a dynamic power-efficient solution.
3Device complexity
If the electronic device relies solely on gravity-based sensor detection, then the system remains simple and power-efficient, but it cannot correctly identify user orientation when lying on the side
Solution Approach 1:
The patent makes the detection system universal by enabling it to handle multiple usage scenarios: traditional portrait/landscape modes using physical sensors, and side-lying mode using face recognition. The system adapts its detection methodology based on the scenario, providing versatile support for different user positions without requiring completely separate systems for each case.
Data Source
AI summary
Embodiments of this application provide a display method, an electronic device, and a storage medium. In this method, if the electronic device is in or enters a landscape side-standing state, a landscape/portrait direction of the electronic device is determined based on a recognized face direction, and when the landscape/portrait direction determined based on the face direction is a portrait direction, a screen display direction of the electronic device is set to portrait display.