Flexible Display Speaker Sound Radiation via Segmented Front and Rear Holes
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Solution Overview
Problem
Existing flexible display devices with speakers face challenges in improving sound quality due to small sound radiation holes, while also needing to prevent increased thickness and foreign substance ingress.
Innovation Solution
A flexible display device design that includes a first body with a deco frame, first and second sound radiation portions, and a filter, which together increase the cross-sectional area of the sound radiation path and minimize external exposure of the sound radiation holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hole for sound radiation is made small to prevent water ingress and maintain aesthetics, then waterproofing and appearance are improved, but sound quality deteriorates
Solution Approach 1:
The sound radiation function is segmented into multiple paths: a first sound radiation hole penetrating the front bezel and a second sound radiation hole penetrating the rear bezel. This segmentation allows each hole to be smaller individually while collectively providing sufficient sound radiation area, resolving the contradiction between small hole size for waterproofing and large total area for sound quality
Solution Approach 2:
The sound radiation is extended from a single-plane (front) opening to a multi-plane configuration by adding a rear sound radiation hole. This dimensional extension allows sound to radiate through both front and rear surfaces, effectively increasing the total radiation area without requiring larger individual holes, thus maintaining waterproofing while improving sound quality
2Object-generated harmful factors
If a single large hole is provided for sound radiation, then sound quality is improved, but device thickness increases and foreign substances can ingress
Solution Approach 1:
The single large sound radiation opening is segmented into multiple smaller holes distributed across front and rear bezels. This segmentation eliminates the need for a large single hole that would increase device thickness, while collectively providing sufficient sound radiation area for good sound quality
Solution Approach 2:
The sound radiation path is extended from a single-plane configuration to a multi-plane configuration by utilizing both front and rear bezels. This dimensional change allows sound to radiate through multiple surfaces, effectively increasing the total radiation area without requiring increased device thickness
3Object-generated harmful factors
If the hole area is increased to improve sound quality, then sound radiation is improved, but exposure to foreign substances increases
Solution Approach 1:
The total sound radiation area is segmented into multiple smaller holes rather than one large hole. This segmentation reduces the exposure area of any single opening to foreign substances while collectively maintaining sufficient sound radiation area for good sound quality
Solution Approach 2:
The sound radiation is distributed across multiple planes (front and rear bezels) rather than concentrated in a single large opening. This dimensional distribution reduces the exposure of any single location to foreign substances while providing adequate total radiation area for sound quality
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 design enhances sound quality by increasing the sound radiation area while maintaining a thin and compact device structure, and prevents foreign substance ingress through the sound radiation holes.
Implementation Method 1
a filter, which together increase the cross-sectional area of the sound radiation path and minimize external exposure of the sound radiation holes
Data Source
AI summary
A flexible display device is disclosed. The flexible display device comprises a first body, a second body, a flexible display, and a speaker. The first body includes a deco frame, a first sound radiation unit, and a second sound radiation unit. The first sound radiation unit and the second sound radiation unit form an outlet through which the sound (sound waves) of the speaker is transmitted to the outside of the first body. The flexible display includes a first region fixed to the first body, and is provided with the second sound radiation unit while the outer surface of the border portion of the first region is spaced apart from the deco frame. The sound (sound waves) of the speaker is transmitted to the outside of the first body through the first sound radiation unit and the second sound radiation unit, such that the sound quality of the speaker can be improved, and the second sound radiation unit can be prevented from being exposed to the outside.