Touch Screen Panel Vibration Control via Differential Support Rigidity
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Solution Overview
Problem
Conventional touch screen panels with tactile presentation functions suffer from insufficient tactile feedback, as the vibration intensity decreases with distance from the piezoelectric elements, leading to inconsistent sensations across the panel.
Innovation Solution
The electronic device incorporates a support structure with first and second support members of varying rigidity, where the first support members are closer to the vibration mechanisms, enhancing vibration propagation and intensity near the mechanisms, while the second support members, farther away, experience reduced vibration, thereby reducing fluctuations in tactile sensation across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If piezoelectric elements are provided at side edge portions of the touch screen panel for tactile presentation, then the operator receives vibration feedback, but the vibration intensity decreases with distance from the piezoelectric elements, causing inconsistent tactile sensation across the panel
Solution Approach 1:
The support structure employs different rigidity characteristics at different locations: first support members with higher rigidity near the piezoelectric elements to enhance vibration intensity, and second support members with lower rigidity farther away to maintain vibration propagation. This local differentiation of support properties resolves the contradiction by optimizing vibration feedback consistency across the touch panel surface.
2Stability of the object's composition
If stabilization cushions are disposed at four corners to absorb vibration, then the touch screen panel is retained, but the tactile presentation may not be sufficient and vibration may not be provided at adequate intensity
Solution Approach 1:
Instead of uniform cushioning at all corners, the invention provides differentiated support: first support members with higher rigidity near vibration sources to amplify tactile feedback, and second support members with lower rigidity at distant locations for stable retention. This localized differentiation allows the system to maintain both panel stability and sufficient vibration intensity for effective tactile presentation.
3Measurement precision
If the operator directly touches the panel surface for input, then the electrostatic capacity change is detected, but the operator has no tactile knowledge of the input operation
Solution Approach 1:
The invention incorporates a vibration mechanism that generates mechanical vibrations in response to detected touch inputs. These vibrations are transmitted through the touch panel to the operator's fingertip, providing tactile feedback that confirms the input operation. This mechanical vibration approach resolves the contradiction by maintaining precise electrostatic detection while adding tactile confirmation through controlled panel vibrations.
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 design provides improved tactile feedback consistency by optimizing vibration distribution, reducing fluctuations in intensity based on touch position, and enhancing waterproof and dustproof properties of the device.
Implementation Method 1
the vibration mechanism, which is provided near the periphery of the touch screen panel so as to be closer to the first support member than to the second support member, vibrates the touch screen panel
Implementation Method 2
piezoelectric elements for tactile presentation purposes are provided at side edge portions of the touch screen panel
Data Source
AI summary
An electronic device includes: a touch screen panel; a support structure having a first support member and a second support member, the first support member and the second support member being in contact with touch screen panel to support the touch screen panel at a periphery of the touch screen panel; a base being in contact with the support structure to support the touch screen panel via the support structure; and a vibration mechanism for vibrating the touch screen panel, the vibration mechanism being provided near the periphery of the touch screen panel so as to be closer to the first support member than to the second support member. The first support member has a rigidity which is greater than a rigidity of the second support member.