Planar Coil Sound Generation for Thin Display Devices
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Solution Overview
Problem
Conventional display devices face challenges in achieving a thin form factor due to the volume and thickness of components like sound generating modules, making it difficult to implement sufficiently thin or bezel-less designs.
Innovation Solution
The display device incorporates a display panel with a sound generating module that utilizes a planar coil and magnet configuration, along with a power supply unit, heat dissipating member, and static electricity blocking member, to generate vibration and sound, while maintaining a thin profile by optimizing the layout and materials used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional sound generating module is used, then sound can be generated, but the thickness and volume increase
Solution Approach 1:
The patent replaces the conventional mechanical sound generating module with an electromagnetic vibration system consisting of a planar coil and magnet. This substitution eliminates the need for traditional mechanical components while maintaining sound generation capability, thereby reducing overall thickness and volume of the display device.
Solution Approach 2:
The patent changes the physical parameters of the sound generating system by using a planar coil configuration instead of a conventional three-dimensional coil structure. This parameter change allows for a flatter, thinner design while preserving the electromagnetic interaction necessary for vibration and sound production.
2Temperature
If components are miniaturized to reduce thickness, then thickness decreases, but heat dissipation and static electricity management become more difficult
Solution Approach 1:
The patent merges multiple functional layers into the substrate structure, including the planar coil, insulation layers, and wiring, all integrated within a thin substrate. This consolidation allows for efficient space utilization while maintaining adequate pathways for heat dissipation and static electricity management through the layered structure.
Solution Approach 2:
The patent employs thin film structures for insulation layers and substrate construction, enabling the overall device to achieve reduced thickness while the layered thin film structure provides channels for heat dissipation and static electricity control without compromising protective functions.
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 thinner display device that can generate sound through vibration, effectively addressing the challenge of integrating sound modules in a compact form, thereby enabling a more streamlined design.
Implementation Method 1
a first substrate including a first planar coil, and disposed under the display panel, a second substrate including a first magnet spaced apart from the first planar coil by a predetermined distance, and disposed under the display panel, and a power supply unit configured to supply alternating current power to the first planar coil
Implementation Method 2
The first planar coil and the first magnet may overlap each other in a planar view
Data Source
AI summary
A display device including a display panel including a plurality of light emitting elements, a first substrate including a planar coil, and disposed under the display panel, a second substrate including a magnet spaced apart from the planar coil by a predetermined distance, and disposed under the display panel, and a power supply unit configured to supply alternating current power to the planar coil. The display device generates sound using an induced magnetic field generated by the planar coil and a magnetic field generated by the magnet.