Electret Diaphragm Fluorescent Layer Integration
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Solution Overview
Problem
Conventional luminescent boards are unable to generate sound, while piezoelectric loudspeakers cannot produce light, necessitating separate spaces for each component in devices that require both functions.
Innovation Solution
A flexible electro-acoustic transducer integrating a conductive plate with through openings, an electret diaphragm, and a fluorescent layer, where the electret diaphragm vibrates to produce sound and the electric field excites the fluorescent layer to generate light, allowing for simultaneous sound and light production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate luminescent board and piezoelectric loudspeaker are used, then sound and light functions are achieved, but device space is increased
Solution Approach 1:
The patent merges the luminescent board and piezoelectric loudspeaker into a single integrated electro-acoustic transducer. The diaphragm serves dual purposes: as a piezoelectric material for sound generation and as a substrate for fluorescent particles for light generation. This combining principle directly resolves the contradiction by achieving both sound and light functions within the same component, eliminating the need for separate spaces for each function.
Solution Approach 2:
The diaphragm in the patent is designed with multi-functionality, serving as both the piezoelectric element for acoustic output and the base layer for fluorescent light emission. By making the diaphragm universal in its function, the patent eliminates the need for separate dedicated components for sound and light, thereby reducing device space while maintaining both functions.
2Illumination intensity
If conventional luminescent board structure is used, then light generation is achieved, but sound generation capability is lost
Solution Approach 1:
The patent combines the luminescent board structure with piezoelectric loudspeaker functionality by integrating the diaphragm as both piezoelectric material and fluorescent substrate. This merging allows the same component to generate both light (through fluorescent particles excited by electrical signals) and sound (through piezoelectric deformation), thus resolving the contradiction between maintaining light generation and gaining sound generation capability.
3Ease of operation
If conventional piezoelectric loudspeaker structure is used, then sound generation is achieved, but light generation capability is lost
Solution Approach 1:
The patent merges the piezoelectric loudspeaker diaphragm with fluorescent light-generating particles. The diaphragm maintains its piezoelectric sound generation function while simultaneously serving as a substrate for fluorescent particles that emit light when excited by electrical signals. This merging principle enables the component to perform both sound output and light generation, resolving the contradiction between maintaining ease of sound operation and gaining light generation capability.
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 electro-acoustic transducer effectively increases available space in devices by combining sound and light functions, offering improved voice performance compared to conventional piezoelectric loudspeakers.
Implementation Method 1
When an external electrical signal is applied to the piezoelectric sheet, the electrical signals will stimulate the piezoelectric material to cause a deformation. The deformation of the diaphragm induced by the piezoelectric material can push the air to make sound.
Implementation Method 2
When the phosphor material is driven by a high voltage, the energy levels of electrons inside the phosphor material will change to cause a fluorescent emission.
Implementation Method 3
When a voltage is applied, an electric filed will be built up between the electrodes 120 and 150 accordingly. The electrons inside the fluorescent material of the fluorescent layer 130 can therefore acquire enough energy to make a transition from a low energy state to a high energy state.
Data Source
Figure 1~2
Figure 3~5
Figure 6a~6b
AI summary
An electro-acoustic transducer according to the present invention is provided. The electro-acoustic transducer includes a conductive plate with a plurality of openings, an electret diaphragm and a fluorescent layer. The electret diaphragm is positioned on the conductive plate and has a film body and an electrode layer. The film body has static charges carried and the electrode layer is formed on the upper surface of the film body. The fluorescent layer is positioned between the lower surface of the film body and the conductive plate.