Low-Friction Glass Top Panel for Tactile Display
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Solution Overview
Problem
Tactile sensation display devices face insufficient expression of tactile sensation due to damping of vibrations from actuators, leading to reduced expressiveness.
Innovation Solution
A top panel with internal friction of 1.0×10−2 or less, preferably 5.0×10−3 or less, made of glass, which securely transmits vibrations from piezoelectric actuators, enhancing tactile sensation expressiveness by controlling frictional force through ultrasonic wave application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional top panel is used in a tactile sensation display device, then the device structure is simple and easy to manufacture, but the vibration from the actuator is damped and not sufficiently transmitted to the user's finger, resulting in insufficient tactile sensation expressiveness
Solution Approach 1:
The patent applies parameter changes by selecting a top panel material with specific internal friction characteristics (1.0×10−2 or less). This parameter optimization ensures that the panel transmits ultrasonic vibrations effectively from the actuator to the user's finger without excessive damping, thereby enhancing tactile sensation expressiveness while maintaining structural simplicity
Solution Approach 2:
The patent employs composite material selection by using glass as the top panel material. Glass provides a combination of low internal friction for vibration transmission, mechanical strength, and transparency, creating an optimal composite solution that addresses multiple requirements simultaneously without complex结构设计
2Reliability
If the internal friction of the top panel is reduced to enhance vibration transmission, then tactile sensation expressiveness is improved, but the material selection and manufacturing precision requirements increase
Solution Approach 1:
The patent establishes a clear parameter specification (internal friction ≤1.0×10−2) that guides material selection and manufacturing. By defining this quantitative threshold, the patent balances the need for low internal friction with practical manufacturing capabilities, ensuring that tactile sensation expressiveness is improved without imposing excessive precision requirements
Solution Approach 2:
The patent applies local quality by focusing the internal friction requirement specifically on the top panel material while allowing other components to have standard specifications. This localized quality control ensures vibration transmission efficiency is optimized at the critical interface without requiring high precision throughout the entire device
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 enhances the expressiveness of tactile sensation by ensuring effective transmission of vibrations to the user's finger, reducing energy output and actuator size, while maintaining mechanical strength and image clarity.
Implementation Method 1
an actuator that applies ultrasonic waves to the top panel for a tactile sensation display device
Implementation Method 2
the vibration from an actuator might be damped and not sufficiently transmitted to a person's finger
Implementation Method 3
a top panel for use in a tactile sensation display device and has an internal friction of 1.0×10−2 or less
Data Source
AI summary
Provided are a top panel for a tactile sensation display device and a tactile sensation display device that are capable of enhancing the expressiveness of tactile sensation. A top panel 1 for a tactile sensation display device is for use in a tactile sensation display device 10 and has an internal friction of 1.0×10−2 or less.