Suspended Display Stack for Low-Frequency Sound Emission
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Solution Overview
Problem
Existing communication devices face issues with poor sound pressure level, poor performance at low frequencies, and distorted sound due to stiff suspension of the display stack, which is compounded by the variability and difficulty in finding suitable flexible glues for attachment.
Innovation Solution
The display stack is suspended by a flexible suspension layer that extends laterally beyond other layers and is attached to the main body at opposing or all edges, forming an integrated part of the display unit without additional suspension means, allowing efficient movement for sound emission across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If flexible glue is used to attach the display stack to the main body, then the display stack can move up and down for sound emission, but the audio performance varies due to glue process variation and it is difficult to find suitable flexible glue
Solution Approach 1:
The invention extracts the suspension function from the adhesive material and transfers it to a dedicated suspension layer within the display stack structure. This separation allows the suspension layer to be specifically designed for mechanical movement while the adhesive simply provides attachment, eliminating the conflict between flexibility and consistency.
Solution Approach 2:
The display stack is segmented into functional layers with distinct roles: the suspension layer provides controlled flexibility for sound emission, while other layers maintain structural integrity. This segmentation allows each layer to be optimized independently, with the suspension layer having the specific property of controlled flexibility.
2Strength
If stiff suspension is used to firmly attach the display stack to the main body, then the attachment is strong, but the sound pressure level is poor and low frequency performance is degraded
Solution Approach 1:
The suspension layer is positioned at specific locations (edges or perimeter) of the display stack, providing localized flexibility where needed for sound emission while maintaining firm attachment at other areas. This local quality approach allows simultaneous achievement of strong attachment and adequate movability.
3Ease of operation
If the display stack is made movable for sound emission, then sound can be produced, but the display stack bends too much which reduces sound system efficiency
Solution Approach 1:
The suspension layer is implemented as a thin, flexible film or layer within the display stack structure. This thin film provides the necessary flexibility for sound emission while its limited thickness and controlled properties prevent excessive bending, maintaining sound system 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 ensures suitable sound pressure is produced without excessive bending of the display stack, maintaining sound quality at lower frequencies and improving audio performance by integrating the suspension layer into the display unit.
Implementation Method 1
The suspension layer is flexible e.g. could be made of a flexible material
Data Source
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AI summary
The disclosure concerns a communication device (102) comprising a housing (104) with a front body (106) and a main body (108). The front body (106) comprises a display unit (110) having a plurality of layers (114, 116, 118, 120, 122) attached to one another. The plurality of layers (114, 116, 118, 120, 122) comprises a suspension layer (116) and a second layer (114, 118, 120, 122), wherein one of the layers is a display (120). At two opposing edges (128) of the suspension layer (116), the suspension layer (116) extends laterally beyond at least the second layer (114, 118, 120, 122). The suspension layer (116) is suspended by attachment of the two opposing edges (128) to the main body (108). The suspended display unit (110) is e.g. used for sound emission by the assistance of an actuator (136). By extending the suspension layer (116) laterally beyond at least the second layer (114, 118, 120, 122) of the plurality of layers and by attaching the suspension layer (116) to the main body (108), the entire display unit (110) is efficiently suspended and is movable up and down in a manner efficient for the emission of sound. By this arrangement an improved attachment of the display unit (110) with regard to sound emission is provided.