Display Actuator Audio Signal Compensation for Body Contact
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Solution Overview
Problem
Portless electronic devices without speaker holes face sound quality degradation due to direct contact with the user's body, which affects the vibration-based audio signal generation.
Innovation Solution
Incorporating a processor-connected actuator system that applies pilot signals to generate vibrations, identifies contact conditions, and adjusts audio signal environments using low-band reinforcement and gain adjustments to maintain sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an actuator causes the display to vibrate to generate an audio signal, then audio output is achieved in portless devices, but sound quality degrades when the device contacts the user's body
Solution Approach 1:
The system applies a pilot signal to the actuator before the actual audio signal to pre-characterize the vibration environment. By measuring the display's vibration response to the pilot signal, the system determines contact conditions in advance and pre-adjusts audio parameters, preventing sound quality degradation before it occurs
Solution Approach 2:
The system uses the vibration signal from the display as feedback to detect contact conditions. By analyzing the vibration characteristics caused by the pilot signal, the system identifies whether the device is in contact with the user's body and dynamically adjusts audio output parameters accordingly
2Adaptability or versatility
If the device is designed without speaker holes for portless operation, then device design is simplified and wireless functionality is improved, but audio signal transmission is affected by body contact
Solution Approach 1:
The system dynamically adjusts audio output parameters based on real-time detection of contact conditions. By continuously monitoring vibration characteristics and adapting audio signal processing accordingly, the system maintains reliable audio quality while preserving the portless design flexibility
Solution Approach 2:
The system changes audio signal parameters such as gain and low-band reinforcement based on detected contact conditions. When contact is detected, the system adjusts these parameters to compensate for the dampening effect, maintaining audio quality without requiring physical speaker holes
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
Prevents sound quality degradation by determining contact states and compensating audio signals, ensuring effective audio output even when the device is gripped or in contact with the user's body.
Implementation Method 1
an actuator that outputs an audio signal by causing a vibration of a display
Implementation Method 2
apply a pilot signal to an actuator, identify a vibration of a display caused by the actuator using the pilot signal
Data Source
AI summary
An electronic device and method for generating an audio signal is provided. According to various example embodiments, an electronic device may include a display configured to depict visual information to the outside of the electronic device. The electronic device further includes an actuator to cause the display to vibrate. A processor is electrically connected to the actuator and the display. The processor applies a pilot signal to the actuator, and detects an amount of vibration of the display caused by applying the pilot signal. The processor sets an environment of the audio signal based on the amount of vibration of the display.