Variable Acoustic Cavity for Flexible Display Resonance Control
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Solution Overview
Problem
Flexible display devices with moving bodies face challenges in dynamically adjusting acoustic path volumes and resonance frequencies to accommodate different operational states, limiting their ability to provide varied sound characteristics and efficient operation.
Innovation Solution
The flexible display device incorporates a variable acoustic cavity system, where the volume of the cavity changes as the bodies move relative to each other, allowing the resonance frequency to adjust, and a controller to identify positions based on these changes, enabling different operational modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display device uses a fixed acoustic path volume, then the device structure is simple, but the acoustic characteristics (resonance frequency) cannot be adjusted for different operational states
Solution Approach 1:
The patent applies the dynamics principle by making the acoustic path volume variable rather than fixed. The movable body (second body) changes position relative to the first body, dynamically adjusting the volume of the acoustic path between the microphone and the external environment. This allows the resonance frequency to be tuned according to different operational states of the flexible display device, resolving the contradiction between adaptability and structural simplicity.
2Reliability
If the acoustic path volume is changed to adjust resonance frequency, then acoustic characteristics can be optimized, but the device structure becomes more complex
Solution Approach 1:
The movable body serves multiple functions: it acts as part of the flexible display structure and simultaneously functions as an acoustic path volume adjuster. By integrating the acoustic adjustment function into the existing movable body rather than adding a separate mechanism, the patent optimizes acoustic performance while minimizing the increase in device complexity.
3Adaptability or versatility
If the flexible display device operates in a single mode, then the control system is simple, but the device cannot adapt to different operational states
Solution Approach 1:
The controller detects the position of the movable body (second body) relative to the first body and uses this feedback information to determine the current operational state of the flexible display device. Based on the detected position, the controller automatically adjusts operational parameters, enabling multi-mode operation without requiring complex manual intervention or additional sensors.
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 allows for a flexible display device that can dynamically change its acoustic characteristics, expanding and deforming its frequency bandwidth, and operate differently based on its state, enhancing its adaptability and functionality.
Implementation Method 1
the volume of the cavity changes as the bodies move relative to each other, allowing the resonance frequency to adjust
Data Source
AI summary
A flexible display device is disclosed. The flexible display device may comprise a first body, a second body, a flexible display, a first microphone, a first cavity and a first variable cavity. The first variable cavity is formed to extend from the first cavity and have a volume that varies when the second body moves with respect to the first body. When the second body moves with respect to the first body, the volume of the first variable cavity changes so that resonance frequencies in the first cavity and the first variable cavity can vary. By using the first variable cavity, the sensitivity of the first microphone can be improved and the state of the flexible display device can be identified.