Flat Coil Sound Generator for Thin Display Devices
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Solution Overview
Problem
Display devices face challenges in reducing the overall thickness, particularly of the sound generator, which affects their compactness and efficiency in various electronic devices.
Innovation Solution
The implementation of a sound generator with a fixed magnetic field generation member and an induced magnetic field generation member, where the induced magnetic field generation member is disposed in a panel layer or embedded in a display circuit board, forming a substantially flat coil to reduce the overall thickness of the sound generator and the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional sound generator is used, then sound generation function is achieved, but the thickness of the sound generator increases
Solution Approach 1:
The patent transitions from a conventional three-dimensional sound generator structure to a substantially two-dimensional flat coil structure. The flat coil is disposed within the display panel plane rather than extending perpendicular to it, effectively reducing the thickness dimension while maintaining the electromagnetic induction mechanism for sound generation. This dimensional reconfiguration allows the sound generator to integrate within the thin profile of the display device.
Solution Approach 2:
The patent merges the sound generator components with existing display panel structures. The flat coil is integrated into the panel layer, and the magnetic field generation member is incorporated into the support structure, combining multiple functions into a unified thin-profile assembly. This merging eliminates the need for separate thick sound generator components while preserving audio output functionality.
2Length of moving object
If the thickness of the sound generator is reduced, then the overall thickness of the display device is reduced, but the magnetic field generation efficiency may be compromised
Solution Approach 1:
The patent employs a substantially flat coil structure that functions as a thin-film electromagnetic component. This flat coil maintains sufficient turn density and conductive material volume within the reduced thickness to generate adequate magnetic field strength through electromagnetic induction, while conforming to the thin-profile requirements of modern display devices.
Solution Approach 2:
The patent utilizes composite structural arrangements combining the flat coil with the panel layer and support structure. This composite integration optimizes the magnetic circuit path and enhances the coupling between the flat coil and magnetic field generation member, maintaining efficient magnetic field generation despite the reduced overall thickness of the assembly.
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 configuration allows for a significant reduction in the overall thickness of the sound generator and the display device, enhancing their compactness and functionality in electronic devices.
Implementation Method 1
a substantially flat member to induce a magnetic field
Implementation Method 2
induced magnetic field generation member... configured as a substantially flat coil... and a support... having a fixed magnetic field generation member disposed therein
Data Source
AI summary
A display device includes: a display panel including a plurality of pixels; a layer disposed on one surface of the display panel and including a substantially flat member to induce a magnetic field; and a support spaced apart from the display panel with the layer interposed therebetween and having a fixed magnetic field generation member disposed therein.