Input Terminal Twist Detection with Rigid Body Substrate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing input terminals face issues with erroneous detection due to low voltage output from twist displacement, leading to increased thickness and cost when attempting to enhance voltage levels by overlaying piezoelectric films, and require complex signal differentiation for bend and twist displacement detection.
Innovation Solution
A thin input terminal design that includes a base substrate with rigid bodies at its ends to prevent deformation and enhance voltage output from twist displacement, using a single piezoelectric film with displacement detection electrodes on both surfaces to detect bend and twist displacements with high sensitivity without increasing film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two piezoelectric films are overlaid to increase voltage level produced by twist displacement, then the voltage output is improved, but the thickness of the entire device increases and transparency significantly lowers
Solution Approach 1:
The patent uses thin piezoelectric film layers that maintain flexibility and transparency while providing sufficient voltage output for displacement detection. The thin film structure minimizes thickness increase and transparency loss compared to thicker alternative materials.
Solution Approach 2:
The patent employs composite structures combining multiple thin piezoelectric film layers with different orientations, creating a multi-functional detection system that achieves high voltage output for both bend and twist detection without requiring excessive thickness.
2Adaptability or versatility
If two piezoelectric films are overlaid to detect both bend and twist displacement, then detection capability is improved, but multiple manufacturing processes are required and cost increases
Solution Approach 1:
The patent designs a single piezoelectric film structure that serves multiple detection functions by incorporating different uniaxial stretching directions within the same film or overlaying films with complementary orientations. This allows one integrated component to detect both bend and twist displacements.
Solution Approach 2:
The patent combines multiple detection functions into a single integrated piezoelectric film structure, reducing the need for separate manufacturing processes for different sensors and simplifying the overall manufacturing workflow.
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
Enables accurate detection of both bend and twist displacements with high sensitivity, reducing noise errors and eliminating the need for multiple piezoelectric films, resulting in a thinner and more cost-effective input terminal.
Implementation Method 1
a piezoelectric film having a flat film shape and including a third principal surface and a fourth principal surface opposing each other, the third principal surface facing the second principal surface of the base substrate; and displacement detection electrodes formed on the third principal surface and the fourth principal surface of the piezoelectric film and which detect voltages produced by a bend displacement of the piezoelectric film
Data Source
AI summary
A panel of an input terminal that includes a base substrate having a first principal surface and a second principal surface opposing each other; a piezoelectric film having a third principal surface and a fourth principal surface opposing each other and made of a uniaxially stretched polylactic acid; and rigid bodies disposed at end portions of the first principal surface and the second principal surface of the base substrate so as to oppose each other across the base substrate and partially prevent a deformation caused by a twist of the base substrate. First displacement detection electrodes are formed on the first principal surface of the piezoelectric film and divide the first principal surface into four. Second displacement detection electrodes are formed on the second principal surface of the piezoelectric film and oppose the first displacement detection electrodes on the first principal surface.