Screen Sound Device Vibration Isolation via Hard Substrate
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Solution Overview
Problem
Conventional screen sounding technologies in mobile phones suffer from poor vibration effects due to the adherence of vibrators to middle frames, leading to energy loss and reduced vibration displacement.
Innovation Solution
A screen sounding device is designed with a vibrator positioned under the screen and supported by a hard substance with specific Young's modulus and area size, allowing for increased vibration displacement and reduced energy loss, while also alleviating heat damage to the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the vibrator is adhered to the middle frame to drive the screen to vibrate, then the screen sounding function is achieved, but the vibration effect is poor due to energy loss and reduced vibration displacement
Solution Approach 1:
The patent extracts the vibrator from the middle frame structure and positions it directly beneath the screen. This removes the intermediate transmission path (middle frame) that caused energy loss, allowing the vibrator to directly drive the screen to vibrate. The hard substance is also extracted as a separate supporting element positioned between the vibrator and screen to optimize vibration transmission.
Solution Approach 2:
The hard substance serves as an intermediary element between the vibrator and the screen. It has specific mechanical properties (hardness, elasticity) that enable it to efficiently transmit vibration from the vibrator to the screen while providing necessary support. This intermediary structure optimizes the vibration transmission path and reduces energy loss.
2Device complexity
If the vibrator is adhered to the middle frame, then the structure is simplified, but the vibration displacement is reduced and energy loss increases
Solution Approach 1:
The vibrator is extracted from the middle frame and repositioned directly beneath the screen, eliminating the need for the middle frame to participate in vibration transmission. This simplifies the vibration path while increasing vibration displacement by removing the intermediate structural constraint.
Solution Approach 2:
The patent introduces a new spatial dimension by positioning the vibrator vertically beneath the screen rather than laterally on the middle frame. This dimensional change allows for greater vibration displacement in the vertical direction and creates a more efficient vibration transmission path.
3Reliability
If the vibrator is positioned close to the screen to improve vibration effect, then heat damage to the screen increases
Solution Approach 1:
The hard substance serves as a thermal and mechanical intermediary between the vibrator and the screen. It provides necessary mechanical support for vibration transmission while creating a thermal barrier that protects the screen from heat generated by the vibrator during operation.
Solution Approach 2:
The patent converts the potentially harmful heat generated by the vibrator into a manageable factor by introducing the hard substance as a thermal barrier. This transforms the heat issue from a harmful effect into a controlled parameter, allowing the vibrator to be positioned close to the screen for optimal vibration effect while protecting the screen from thermal damage.
4Device complexity
If the middle frame is used to support the vibrator, then the device structure is simplified, but the vibration of the middle frame and rear cover increases causing noise
Solution Approach 1:
The vibrator is extracted from the middle frame structure, removing the source of vibration-induced noise. By positioning the vibrator directly beneath the screen with the hard substance as support, the middle frame is no longer subjected to vibration forces, eliminating the noise generated by middle frame and rear cover vibration.
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 enhances vibration effects across the screen, reduces device thickness, and improves heat dissipation, resulting in a more effective and durable screen sounding mechanism.
Implementation Method 1
the vibrator drives, by using the hard substance, the screen to vibrate in a direction perpendicular to the surface of the screen
Implementation Method 2
A Young's modulus of the hard substance is greater than a preset value
Implementation Method 3
the hard substance disposed between the screen and the vibrator can alleviate damage to the screen caused by heat emitting of the vibrator
Data Source
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AI summary
This application provides a screen sounding device. A vibrator and a hard substance that has a specific Young's modulus and area size are disposed under a screen. The vibrator drives, by using the hard substance, the screen to vibrate in a direction perpendicular to a surface of the screen. Therefore, in a process in which the vibrator vibrates the screen by using the hard substance, a vibration area of the screen can be increased by using the hard substance, to enable, as much as possible, most regions of the screen to be vibrated, thereby generating a better vibration effect.