Composite Piezoelectric Stack for Slim Multifunction Electronics
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Solution Overview
Problem
Existing electronic devices face challenges in miniaturization and slimness due to the need for separate components for various functions like haptic, speaker, and finger scan recognition, which complicates integration and increases size.
Innovation Solution
A composite piezoelectric element is developed, comprising alternately arranged insulating films and piezoelectric bodies, including ultrasonic oscillating and reception piezoelectric bodies with cavities, and optionally polymer and metal components, to perform multiple functions such as haptic, speaker, and finger scan recognition, facilitating miniaturization and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate devices are built for each function (haptic, speaker, receiver, finger scan recognition), then each function can be performed independently, but the device size increases and miniaturization becomes difficult
Solution Approach 1:
The patent combines multiple separate piezoelectric devices (haptic actuator, speaker actuator, receiver actuator, and finger scan recognition device) into a single integrated composite piezoelectric element. The insulating films and piezoelectric bodies are alternately arranged in a stacked configuration, allowing all functions to be performed by one component, thereby reducing device volume while maintaining functional versatility.
Solution Approach 2:
The composite piezoelectric element is designed to perform multiple functions simultaneously: haptic feedback, speaker operation, receiver functionality, and finger scan recognition. The universal design allows a single element to replace multiple specialized devices, enabling miniaturization while providing adaptability across different functional requirements.
2Adaptability or versatility
If multiple separate components are used for various functions, then functional requirements are met, but device slimness is compromised
Solution Approach 1:
The patent merges multiple thick separate components into a single thin stacked structure. By arranging insulating films and piezoelectric bodies in an alternating layered configuration, the overall thickness is significantly reduced compared to using separate discrete devices, thereby achieving device slimness while maintaining all required functions.
Solution Approach 2:
The patent transitions from a three-dimensional arrangement of separate bulky components to a two-dimensional layered structure. The stacked configuration of thin films and plates allows the multiple functions to be integrated in a planar arrangement, reducing the vertical dimension (thickness) while preserving functional versatility.
3Adaptability or versatility
If separate devices are used for each function, then functional independence is maintained, but integration difficulty increases
Solution Approach 1:
The patent combines multiple independently functional devices into a single integrated element with a unified structure. The alternating arrangement of insulating films and piezoelectric bodies creates a cohesive component that maintains functional independence while simplifying integration, as only one element needs to be installed rather than multiple separate devices.
Solution Approach 2:
The composite piezoelectric element is segmented into distinct functional regions with specific piezoelectric bodies arranged for different purposes (haptic, speaker, receiver, finger scan). This segmentation allows each function to operate independently while being integrated into a single manufacturable component, reducing integration complexity compared to assembling multiple separate devices.
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 composite piezoelectric element enables the integration of multiple functions into a single film-type device, enhancing miniaturization and slimness of electronic devices while maintaining flexibility and improved performance in ultrasonic oscillation and reception.
Implementation Method 1
a piezoelectric body may be used for a finger scan recognition function
Implementation Method 2
an ultrasonic oscillating piezoelectric body for oscillating ultrasonic waves for finger scan recognition
Implementation Method 3
an ultrasonic reception piezoelectric body for receiving a reflective signal reflected by ultrasonic waves
Data Source
AI summary
A composite piezoelectric element and an electronic device having the same are disclosed, in which the composite piezoelectric element includes insulating films and piezoelectric bodies, which are alternately arranged, wherein the piezoelectric bodies may be categorized into general piezoelectric bodies used as at least one of a haptic actuator, a speaker actuator and a receiver actuator, and a finger scan recognition piezoelectric body for finger scan recognition.