Flexible Electronic Device with PET Film Substrate and Speaker
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Solution Overview
Problem
Conventional electronic devices with liquid crystal displays are bulky, fragile, and limited in their ability to be attached to curved surfaces, making them unsuitable for flexible applications such as price tags or multimedia equipment.
Innovation Solution
A flexible electronic device with a flexible speaker, comprising a flexible printed circuit board, input unit, display unit, power supply, and a thin-film substrate made of polyethylene terephthalate (PET) film, which allows the device to be thin, lightweight, and capable of being attached to curved surfaces, featuring a flexible electret condenser speaker and a lithium polymer battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal display with glass substrate is used, then the display function is achieved, but the device becomes bulky and heavy
Solution Approach 1:
The patent replaces the traditional glass substrate with a flexible thin film substrate that completely covers the FPC, power supply, and other components. This thin film substrate enables the entire device to be flexible and significantly reduces the weight compared to glass-based LCDs, while maintaining the display function through the flexible display unit.
Solution Approach 2:
The patent employs composite material structures including flexible printed circuit boards, flexible display units, and thin film substrates made of flexible materials. These composite flexible structures replace the rigid glass substrate, achieving both weight reduction and flexibility while preserving the display functionality.
2Reliability
If a liquid crystal display with glass substrate is used, then the display function is achieved, but the device becomes fragile and prone to breakage
Solution Approach 1:
The patent replaces the fragile glass substrate with a flexible thin film substrate that completely covers the internal components. This flexible film substrate is inherently more durable and resistant to breakage, eliminating the fragility issue of glass while maintaining the display function through the flexible display unit.
Solution Approach 2:
The patent changes the physical parameters of the substrate from rigid glass to flexible thin film material. This parameter change fundamentally alters the mechanical properties, making the substrate flexible and durable while preserving the display functionality through the flexible display components.
3Reliability
If a conventional rigid electronic device is used, then the display and audio functions are achieved, but the device cannot be attached to curved surfaces
Solution Approach 1:
The patent employs flexible thin film substrates and flexible components throughout the device structure, enabling the entire device to be bent and conform to curved surfaces. This flexibility allows the device to be attached to various curved surfaces while maintaining the display and audio output functions.
Solution Approach 2:
The patent creates a dynamically flexible device structure that can adapt its shape to match curved surfaces. The flexible components allow the device to be conformally attached to different geometries, providing versatility in application scenarios while preserving the core display and audio functions.
4Adaptability or versatility
If flexible components are used throughout the device, then the device can be bent and attached to curved surfaces, but the structural complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated flexible components. The flexible display unit, flexible speaker, and flexible circuit board are combined into a unified flexible structure, reducing the number of separate components and simplifying the overall structure while maintaining adaptability to curved surfaces.
Solution Approach 2:
The flexible thin film substrate serves multiple functions simultaneously: it acts as the structural base, the protective cover, and the flexible element that enables curved surface attachment. This multi-functionality reduces the need for additional separate components, thereby reducing structural complexity.
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 flexible electronic device provides a durable, portable, and versatile solution for displaying information on curved surfaces, enabling applications like price tags and multimedia equipment with improved audio and video performance, while maintaining functionality even when bent.
Implementation Method 1
a flexible electret condenser speaker
Data Source
AI summary
A flexible electronic device with flexible speaker is disclosed, comprising: a flexible printed circuit board (FPC), having a circuit layout arranged thereon; an input unit, electrically connected to the FPC for setting an information; a flexible speaker, electrically connected to the FPC for outputting the information; a display unit, electrically connected to the FPC for displaying the information; a power supply, electrically connected to the FPC for outputting the information for providing electricity to the FPC, the input device, the display device and the flexible speaker; a thin-film substrate; a film made of poly ethylene terephthalate (PET), referring as PET film hereinafter; wherein, the thin-film substrate completely cover the FPC, the power supply, and all the FPC, the input unit, the display unit, the power supply, the thin-film substrate and the flexible speaker are flexible.