Input Device Dual-Adhesive Vibration Control
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Solution Overview
Problem
Existing input devices face challenges in effectively generating a range of vibration frequencies on the operation panel, as increasing the rigidity of the operation panel or adhesive portion favors either high or low frequency vibrations, making it difficult to simultaneously produce multiple vibration modes.
Innovation Solution
The input device employs a dual-adhesive system with a first adhesive portion of lower hardness at the vibrator's peripheral region and a second adhesive portion of higher hardness elsewhere, allowing the operation panel to vibrate in multiple modes by adjusting the rigidity and absorption of vibrations accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hardness of the adhesive portion is made relatively high to enhance the strength of the adhesive portion, then high frequency vibration is easily generated on the operation panel, but low frequency vibration is hard to be generated
Solution Approach 1:
The adhesive portion is divided into two regions with different hardness properties: a first adhesive portion with relatively high hardness for strength and high frequency vibration, and a second adhesive portion with relatively low hardness for low frequency vibration. This local differentiation of material properties allows the operation panel to support multiple vibration modes simultaneously.
Solution Approach 2:
The adhesive portion is segmented into multiple distinct regions (first adhesive portion and second adhesive portion) with different functional characteristics. The first adhesive portion is positioned in specific areas to provide structural strength and enable high frequency vibration, while the second adhesive portion is positioned in other areas to enable low frequency vibration, thus resolving the contradiction between strength and vibration versatility.
2Adaptability or versatility
If the hardness of the adhesive portion is made relatively low to lower the rigidity of the adhesive portion, then low frequency vibration is easily generated on the operation panel, whereas high frequency vibration is hard to be generated
Solution Approach 1:
Different regions of the adhesive portion are assigned different hardness levels to satisfy conflicting requirements: the first adhesive portion with high hardness provides structural strength and supports high frequency vibration, while the second adhesive portion with low hardness provides flexibility for low frequency vibration. This spatial differentiation of material properties resolves the contradiction.
Solution Approach 2:
The adhesive portion is divided into functionally distinct segments where the first adhesive portion (high hardness) and second adhesive portion (low hardness) are positioned in different areas. This segmentation allows each region to independently fulfill its specific function without compromising the overall performance of the adhesive system.
3Speed
If the rigidity of the operation panel is increased as the vibration frequency increases, then high frequency vibration is easily generated on the operation panel, but low frequency vibration is hard to be generated
Solution Approach 1:
The adhesive portion creates local variations in rigidity: the first adhesive portion with high hardness creates stiffer regions that support high frequency vibration modes, while the second adhesive portion with low hardness creates more flexible regions that support low frequency vibration modes. This local differentiation of rigidity allows multiple vibration frequencies to coexist.
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
This configuration enables effective generation of both high and low frequency vibrations on the operation panel, enhancing the tactile feedback experience for users by creating distinct vibration modes.
Implementation Method 1
The operation panel and the support panel adhere to each other by an adhesive portion such as a double-sided tape
Implementation Method 2
a vibrator that is mounted on a peripheral region of the operation panel, and vibrates the operation panel in a plurality of modes having different vibration frequencies
Data Source
AI summary
An input device according to one aspect of an embodiment includes an operation panel, a vibrator, a support panel, and an adhesive portion. The operation panel has an operation surface. The vibrator is mounted on a peripheral region of the operation panel and vibrates the operation panel in a plurality of modes having different vibration frequencies. The support panel is disposed to face a back surface of the operation panel that is opposite to the operation surface of the operation panel and supports the operation panel. The adhesive portion adheres the operation panel and the support panel to each other. In addition, the adhesive portion includes a first adhesive portion and a second adhesive portion. The first adhesive portion adheres the peripheral region of the operation panel on which the vibrator is mounted and the support panel to each other. The second adhesive portion has a higher hardness than a hardness of the first adhesive portion, and adheres a region other than the peripheral region of the operation panel and the support panel to each other.