Display Sound Emission Feedback Using Vibration Sensor Signals
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining high-quality audio output when using displays as sound emitters, as the unique physical characteristics of the display and vibration mechanisms lead to inaccurate feedback loops and echo cancellation issues, affecting sound quality and space utilization.
Innovation Solution
Incorporating a vibration sensor coupled to the display to generate a vibration sensor signal that accurately represents the acoustic output, allowing for feedback control and echo cancellation by processing this signal to adjust the audio signal and cancel echo signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional audio speaker is added to the device, then audio output quality is improved, but the display area is reduced due to space occupation
Solution Approach 1:
The display is made to serve dual functions: visual information display and audio sound emission. By integrating the actuator with the display structure, the display becomes a multi-functional component that eliminates the need for a separate speaker, thereby maximizing display area while maintaining audio output capability
Solution Approach 2:
The audio emission function is merged with the display by physically coupling the actuator to the display. This combination integrates two previously separate functions (visual display and audio output) into a single unified structure, allowing the display to emit sound directly without requiring additional space for a traditional speaker
2Measurement precision
If feedback control is implemented using the vibration sensor signal, then audio output accuracy is improved, but system complexity increases
Solution Approach 1:
A feedback control system is implemented where the vibration sensor continuously monitors the display's vibration and generates a vibration sensor signal. This signal is processed to create an echo reference signal that is fed back to the processor, which adjusts the audio signal to cancel echo and improve audio output accuracy. The feedback loop enables real-time compensation for variations in display vibration characteristics
Solution Approach 2:
The vibration sensor acts as an intermediary element between the display and the control system. It converts mechanical vibration into an electrical vibration sensor signal that can be processed by the audio amplifier and processor, enabling precise measurement and control of display vibration without requiring direct complex sensing mechanisms
3Area of stationary object
If the display is used as a sound emitter, then space utilization is improved, but audio quality deteriorates due to inaccurate feedback loops
Solution Approach 1:
The vibration sensor provides accurate feedback about the display's actual vibration characteristics, enabling the processor to compensate for deviations from ideal audio emission. This feedback mechanism corrects for variations in display response, ensuring high audio quality despite using the display as the sound emitter
Solution Approach 2:
The patent replaces the traditional mechanical speaker system with an electro-mechanical system where an actuator directly drives the display. This substitution allows for more precise control of the sound-emitting surface through electrical signals, improving audio quality while maintaining space efficiency
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 solution enhances audio quality by providing accurate feedback for display-based sound emission, improving echo cancellation and allowing for more efficient use of space by eliminating the need for traditional audio speakers.
Implementation Method 1
an actuator physically coupled to the display and configured to cause vibration of the display in response to an audio signal that is an input to the actuator
Implementation Method 2
a vibration sensor physically coupled to the display and configured to sense the vibration of the display due to the actuator and to output a vibration sensor signal proportional to the vibration of the display
Implementation Method 3
The echo reference signal corresponds to a representation of an acoustic output (e.g., audio output) of the display due to the vibration of the display
Data Source
AI summary
Aspects of the disclosure relate to using a display as a sound emitter and may relate to an electronic device including a display. In particular a vibration sensor such as an accelerometer is physically coupled to the display and senses display vibration to provide a high accuracy feedback loop with respect to representing actual audio output from the display. The electronic device includes an actuator physically coupled to the display and configured to cause vibration of the display in response to an audio signal. The electronic device further includes a vibration sensor physically coupled to the display and configured to output a vibration sensor signal proportional to the vibration of the display due to the actuator.