Phone Screen Switching Using Acoustic Face Detection Regions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing terminal devices inaccurately switch to a light-off state during voice communication due to users' body parts other than their face being too close, leading to erroneous judgments.
Innovation Solution
The terminal transmits a pre-defined frequency sound wave during voice communication and uses sound wave receiving devices to determine a target detection region, switching the screen to a light-off state only when the target object is within this region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a distance sensor is used to detect objects close to the terminal, then the screen can be automatically switched to light-off state, but erroneous judgments occur when body parts other than the face are detected
Solution Approach 1:
The detection space is segmented into multiple detection regions (first detection region, second detection region, third detection region) corresponding to different body parts. Each region is associated with a specific body part (face, hand, other body part), allowing the system to identify not just the presence but also the type of object approaching the terminal, thereby eliminating erroneous screen switching
Solution Approach 2:
Multiple sound wave receiving devices are introduced as intermediaries to detect reflected sound waves from different directions. By analyzing the direction and characteristics of reflected sound waves received by different devices, the system can determine which detection region the approaching object is in, enabling accurate identification of body parts and preventing false screen switching
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 method reduces erroneous judgments and improves user experience by accurately distinguishing between the user's face and other body parts, ensuring the screen is only switched off when the face is not in close proximity.
Implementation Method 1
the target receiving sound wave being formed by reflecting the transmission sound wave by a target object
Data Source
AI summary
A method for switching a screen state, a terminal, and computer-readable medium are provided. The method includes: transmitting a transmission sound wave when it is detected that the screen state of the terminal is in a light-on state during a voice communication session, the transmission sound wave being a sound wave of a pre-defined frequency; determining a target detection region when a target receiving sound wave is received through a plurality of pre-installed sound wave receiving devices, the target receiving sound wave being formed by reflecting the transmission sound wave by a target object; and switching the screen state of the terminal from the light-on state into a light-off state when it is determined that the target object is located in the target detection region.