Screen Sounding Device Film Structure Full-Screen Design
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Solution Overview
Problem
Conventional screen sounding technologies for mobile phones have poor sounding effects, high energy consumption, and increased manufacturing costs, especially when trying to achieve a full-screen design without external speakers, and methods like punching holes weaken the display substrate.
Innovation Solution
A screen sounding device with a substrate and a sounding structure comprising a first electrode, an insulating layer, and a second electrode with a suspended portion and connecting portion, forming a sounding cavity, which vibrates to produce sound when receiving different driving signals, allowing for precise control and low-cost manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hole is punched on the screen to attach the vibrator, then the sounding effect is improved, but the strength of the display substrate is weakened and manufacturing cost increases
Solution Approach 1:
The patent extracts the harmful punching process entirely. Instead of punching holes through the display substrate, the invention forms the sounding cavity using only film layers (insulating layer with through-holes and suspended portion) that are deposited and patterned on the substrate surface, completely avoiding damage to the display substrate while achieving the same acoustic function.
Solution Approach 2:
The patent replaces the mechanical punching process with a film deposition and patterning process. The sounding cavity is formed by depositing insulating layers with through-holes and suspended portions using conventional semiconductor fabrication techniques, substituting mechanical force with material deposition and chemical etching processes.
2Ease of manufacture
If the exciter is attached to the middle frame, then the manufacturing process is simple, but the sounding effect is poor and energy consumption is high
Solution Approach 1:
The patent transitions from attaching the exciter to a two-dimensional surface (middle frame) to integrating the sounding cavity directly into the multi-layer film structure on the substrate. This dimensional integration allows the exciter to couple more efficiently with the display substrate, improving sound transmission while maintaining manufacturing simplicity through conventional layer deposition processes.
3Adaptability or versatility
If the screen sounding structure is added, then the full-screen design is achieved, but the device complexity increases
Solution Approach 1:
The patent merges the sounding cavity formation process with the existing display substrate manufacturing process. The insulating layers with through-holes and suspended portions are deposited and patterned as integral parts of the display structure, combining the acoustic function with the display structure rather than adding separate components.
Solution Approach 2:
The patent creates a multi-functional film structure where the insulating layers serve both as electrical insulation and as the acoustic cavity structure. The through-holes and suspended portions of the insulating layers form the sounding cavity that works with the exciter to produce sound, making the same structural elements serve multiple functions.
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 a desirable sounding effect with low energy consumption and reduced manufacturing costs, enabling a thin and light design for display terminal products while maintaining the strength of the display substrate.
Implementation Method 1
when the first electrode and the second electrode receive different driving signals, the suspended portion is capable of vibrating and sounding
Implementation Method 2
a sounding cavity is defined between the suspended portion and the insulating layer, the connecting portion is formed to have an opening in communication with the sounding cavity
Data Source
AI summary
A screen sounding device and a display device are disclosed. The screen sounding device includes a sounding structure. The sounding structure includes a first electrode, an insulating layer, and a second electrode stacked in sequence. A sounding cavity is formed between a vibrating portion of the second electrode and the insulating layer. The first electrode and the second electrode receive different driving signals, and the vibrating portion can drive the air in the sounding cavity to vibrate and sound. The screen sounding device of the present disclosure has a desirable sounding effect, various setting positions, and low manufacturing costs.