Transparent Piezoelectric Sounding Device for High Screen-to-Body Ratio Displays
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Solution Overview
Problem
Conventional sounding devices have a large volume, obstructing the increase in screen-to-body ratio of smart display devices and cannot be integrated within them due to their size and need for external exposure to transmit sound waves.
Innovation Solution
A transparent sounding device with a membrane structure is developed, comprising a transparent structural layer with recesses and piezoelectric vibrating films that form cavities, allowing for a thin and light design that can be integrated into display devices, enabling increased screen-to-body ratio and enhanced sound capabilities such as directional and surround sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional sounding devices are used, then sound transmission function is achieved, but device volume is large and screen-to-body ratio cannot be increased
Solution Approach 1:
The patent uses a flexible transparent structural layer that can be bent and deformed to form the sounding device structure. This thin film approach replaces conventional bulky sounding device components, enabling miniaturization while maintaining sound transmission functionality. The flexible nature allows the device to be integrated into display panels without requiring additional space.
Solution Approach 2:
The sounding device is nested within the display panel structure by forming it using the transparent structural layer that is already part of the display device. The piezoelectric vibrating film and cavity structure are integrated within the existing layers, allowing the sounding device to occupy minimal additional space while providing full functionality.
2Adaptability or versatility
If conventional sounding devices are used, then sound transmission is achieved, but device cannot be integrated within display panel
Solution Approach 1:
The transparent structural layer serves multiple functions: it acts as both the structural component of the display device and the base material for the sounding device. The piezoelectric vibrating film serves dual purposes as both the actuator for sound generation and a functional layer within the display structure. This multi-functionality enables integration without adding separate dedicated components.
Solution Approach 2:
The patent merges the sounding device structure with the display panel structure by using the same transparent structural layer for both purposes. The cavity formation and piezoelectric film integration combine multiple functions into a single integrated structure, eliminating the need for separate sounding device housings and mounting structures.
3Shape
If transparent structural layer with recess and piezoelectric vibrating film is used, then light and thin transparent sounding device is achieved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into distinct steps: forming the recess in the transparent structural layer, depositing the piezoelectric vibrating film, creating the cavity structure, and assembling the components. This segmentation allows each step to be optimized independently and facilitates modular manufacturing, reducing overall complexity despite the multi-step process.
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 integrated sounding device achieves a higher screen-to-body ratio, allows for larger area coverage, and provides greater sound pressure without affecting the display, enabling more efficient sound transmission and improved user experience.
Implementation Method 1
at least one piezoelectric structure located on a side of the cavity away from the transparent structural layer. Each of the at least one piezoelectric structure includes: a first electrode located on a side of the cavity away from the transparent structural layer; a piezoelectric material layer located on a side of the first electrode away from the cavity; and a second electrode located on a side of the piezoelectric material layer away from the first electrode
Implementation Method 2
a sounding device is a device which moves the air by generating a mechanic vibration, so as to cause a fluctuation of the air medium, thereby converting an electrical energy to a kinetic energy and then to a sound wave
Data Source
AI summary
A sounding device, a manufacturing method thereof and a display device are provided. The sounding device includes at least two sounding units. Each of the sounding units includes: a transparent structural layer, including a recess and a supporting member located around the recess; and a piezoelectric vibrating film covering the recess, a cavity is formed by the piezoelectric vibrating film and the supporting member. The piezoelectric vibrating film includes a base film covering the recess; and at least one piezoelectric structure located on a side of the cavity away from the transparent structural layer. Each of the at least one piezoelectric structure includes: a first electrode; a piezoelectric material layer located on a side of the first electrode away from the cavity; and a second electrode located on a side of the piezoelectric material layer away from the first electrode.