Screen Sounding Device Electromagnetic Driving Module
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Solution Overview
Problem
Existing screen sounding devices in electronic devices face reliability issues due to complex structures and limited sound performance, with piezoelectric types requiring high voltage and moving coil types having size and force limitations.
Innovation Solution
A screen sounding device with an electromagnetic driving module comprising an electromagnet, magnetic conduction base, and covering plate, where the driving force is controlled by electric current magnitude, allowing for a simpler structure, smaller size, and improved sound performance without a diaphragm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a piezoelectric driving device is used, then the device can be made compact, but it requires a larger voltage which reduces reliability
Solution Approach 1:
The patent replaces the piezoelectric driving mechanism with an electromagnetic driving module. The electromagnetic module uses a coil and magnetic core to generate driving force through electromagnetic interaction, eliminating the need for high voltage that plagued piezoelectric systems while maintaining compact dimensions suitable for mobile phone integration.
Solution Approach 2:
The patent changes the operating parameters from high voltage (piezoelectric) to moderate voltage with controlled current (electromagnetic). The electromagnetic driving module operates at standard mobile phone voltage levels while using current magnitude control to adjust driving force, thereby improving reliability without sacrificing compactness.
2Reliability
If a moving coil driving device is used, then the device can operate at standard voltage, but the structure becomes complicated and size reduction is difficult
Solution Approach 1:
The patent merges the electromagnetic driving module with the screen assembly, where the magnetic conduction base integrates with the screen frame and the magnetic conduction covering plate integrates with the screen back cover. This consolidation eliminates separate speaker components and reduces overall structural complexity while maintaining reliable electromagnetic driving.
Solution Approach 2:
The screen serves dual functions: display and sound generation. The electromagnetic driving module drives the screen to vibrate for sound output while the screen maintains its display function. This multi-functionality eliminates the need for separate speaker structures, reducing complexity while preserving reliability.
3Reliability
If a moving coil driving device is used, then the device can operate at standard voltage, but the driving force is limited and sound performance is poor
Solution Approach 1:
The patent optimizes electromagnetic parameters including coil turns, current magnitude, and magnetic core geometry to enhance driving force. The control module adjusts current magnitude dynamically to provide sufficient driving force for high-quality sound output while operating at standard voltage levels, overcoming the force limitations of conventional moving coil designs.
Solution Approach 2:
The patent employs magnetic conduction materials with optimized properties in the magnetic core and covering plates. These composite magnetic structures enhance the electromagnetic interaction efficiency, generating stronger driving force for the screen vibration while maintaining reliable operation at standard voltage.
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 enhanced driving force and sound quality, reduces device thickness and size, lowers manufacturing costs, and simplifies installation compared to traditional speakers.
Implementation Method 1
an electromagnet, a magnetic conduction base and a magnetic conduction covering plate
Implementation Method 2
The strength of the driving force can be controlled by changing the magnitude of the electric current flowing into the coil
Data Source
AI summary
The present invention discloses a screen sounding device, including a screen, a frame and an electromagnetic driving module. The electromagnetic driving module includes an electromagnet, a magnetic conduction base and a magnetic conduction covering plate. The strength of the driving force can be controlled by changing the magnitude of the electric current flowing into the coil, which can provide a greater driving force to obtain a better sound effect. In addition, the driving module of the present invention has a simple structure and can be easily installed; the vibration amplitude of the screen is small, and the sounding device can be made thinner and smaller; compared with the traditional speaker and receiver, the structure such as the diaphragm is omitted, and the manufacturing cost is lower.