Flexible Display Piezoelectric Speaker Layout for Adaptive Sound Output
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Solution Overview
Problem
Flexible electronic devices face space constraints for speaker arrangement due to their limited size, and existing speakers may not adapt sound output based on environmental or scenario changes.
Innovation Solution
Implementing a piezoelectric speaker with N piezoelectric films attached to a flexible display, controlled by a processor to adjust sound output based on display state changes, such as expansion or contraction, and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional speaker is used in a flexible electronic device, then space for speaker arrangement is limited due to device size constraints, but sound output quality and adaptability remain insufficient
Solution Approach 1:
The speaker is divided into multiple piezoelectric films (first, second, third, and fourth piezoelectric films) arranged at different locations on the flexible display. Each film can be independently controlled to output sound, allowing the system to segment the sound output function across multiple small units rather than requiring a single large speaker, thereby adapting to space constraints while maintaining versatile sound output capabilities
Solution Approach 2:
The processor dynamically selects which piezoelectric films to activate based on the detected state of the flexible display (e.g., whether the display is in a compact or expanded configuration). This dynamic adaptation allows the sound output system to adjust its configuration in real-time according to the device's physical state, optimizing sound quality and adaptability for different usage scenarios
2Volume of moving object
If the flexible display changes state (e.g., expansion or contraction), then space utilization is optimized, but the speaker must adapt its sound output accordingly
Solution Approach 1:
The system uses a sensor to detect the state of the flexible display (such as its expansion or contraction) and provides this information as feedback to the processor. The processor then uses this feedback to determine which piezoelectric films should be activated for sound output, creating a closed-loop control system that automatically adapts sound output to the current device state
Solution Approach 2:
The processor dynamically adjusts the sound output configuration based on real-time changes in the flexible display state. When the display expands or contracts, the system identifies which piezoelectric films are in the appropriate location and activates them accordingly, enabling the speaker to adapt its behavior to match the device's volumetric changes
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
The solution allows for automatic adjustment of sound output according to the device's structural deformation and state changes, optimizing space utilization and adapting sound based on user needs.
Implementation Method 1
A piezoelectric speaker (or a piezo speaker) using the piezoelectric effect may be a speaker using the principle of generating sound by causing deformation or vibration by applying a potential difference to a piezoelectric body
Implementation Method 2
The piezoelectric effect may be an effect in which a potential difference is generated when pressure or vibration is applied to a piezoelectric body
Data Source
AI summary
A flexible electronic device includes: a sensor; a flexible display; a piezoelectric speaker including N piezoelectric films attached to the flexible display; and a processor configured to: detect a change of a state of the flexible display through the sensor; based on the change of the state of the flexible display, determine locations of a number of piezoelectric films through which sound is to be output, among the N piezoelectric films; and output sound through the number of piezoelectric films by controlling the piezoelectric films to be activated, based on the determined locations of the number of piezoelectric films.