Screen Sounding Device Electromagnetic Drive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing screen sounding devices in mobile terminals face challenges with high energy consumption and limited driving force, particularly with piezoelectric type devices requiring large voltage and moving coil type devices being inefficient.
Innovation Solution
A screen sounding device featuring a magnetic circuit system with an electromagnet, including an iron core, coil, and multiple magnets distributed around the electromagnet, which interacts with a magnetic circuit system to generate stronger driving force with lower energy consumption, omitting the need for a diaphragm structure and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If piezoelectric type driving device is used, then driving force is sufficient, but energy consumption is high
Solution Approach 1:
The patent replaces the piezoelectric driving device with an electromagnetic driving device consisting of an electromagnet and magnetic circuit system. This substitution uses electromagnetic interaction instead of piezoelectric effect, achieving sufficient driving force through magnetic attraction and repulsion between the electromagnet and magnets, while significantly reducing energy consumption as electromagnetic driving requires lower voltage and power.
Solution Approach 2:
The patent changes the operating parameters of the driving device by using an electromagnet with optimized magnetic circuit design. The magnetic circuit system includes magnetic conducting plates and magnets arranged to maximize magnetic flux efficiency, allowing the device to operate at lower voltage and current levels while maintaining adequate driving force for screen vibration.
2Use of energy by moving object
If moving coil type driving device is used, then energy consumption is low, but driving force is limited
Solution Approach 1:
The patent segments the magnetic circuit into distinct components: the electromagnet assembly and the magnetic circuit system with separate magnets and magnetic conducting plates. This segmentation allows optimization of each component's function, with the electromagnet providing controlled magnetic force and the magnetic circuit system efficiently transmitting and amplifying this force to the screen, achieving both low energy consumption and sufficient driving force.
Solution Approach 2:
The patent introduces a magnetic circuit system as an intermediary between the electromagnet and the screen. This intermediate magnetic circuit includes magnets and magnetic conducting plates that amplify and direct the magnetic force from the electromagnet to the screen, enabling the system to achieve greater driving force than a simple moving coil device while maintaining low energy consumption.
3Device complexity
If traditional driving device is used, then structure is simple, but sound performance is limited
Solution Approach 1:
The patent makes the screen serve multiple functions: it acts as both the display component and the sounding surface. The magnetic circuit system is designed to couple directly with the screen, enabling the screen to function as the vibration membrane for sound generation. This multi-functionality improves sound performance without significantly increasing overall device complexity, as it utilizes existing screen structure.
Solution Approach 2:
The patent adds a magnetic circuit dimension to the traditional screen structure by incorporating magnets and magnetic conducting plates. This dimensional addition creates a three-dimensional magnetic field interaction system that significantly enhances sound performance, transforming the flat screen into an active acoustic element capable of producing rich, resonant sounds.
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 solution provides improved sound performance with greater driving force and reduced energy consumption, enabling slimmer mobile terminal designs while minimizing material usage and manufacturing costs.
Implementation Method 1
The driving device includes a magnetic circuit system fixed on the screen and an electromagnet for driving the magnetic circuit system
Implementation Method 2
the magnet is arranged around the electromagnet. By virtue of the configuration, the driving force is greater and the sound performance is improved
Data Source
AI summary
The invention provides a screen sounding device, including a frame; a screen installed on the frame; and a driving device arranged between the frame and the screen for driving the screen to generate sound. The driving device includes a magnetic circuit system fixed on the screen and an electromagnet for driving the magnetic circuit system. The magnetic circuit system includes a connection covering plate fixed on the screen and a magnet fixed on a side of the connection covering plate away from one of the screen, and the magnet is arranged around the electromagnet. By virtue of the configuration, the driving force is greater and the sound performance is improved.