Touch Pad Support Section Displacement Vibration for Tactile Consistency
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Solution Overview
Problem
Existing touch pads in electronic devices exhibit varying tactile sensations based on touch position, leading to inconsistent user experience due to differences in vibration amplitudes across the touch surface.
Innovation Solution
Incorporating a support section that vibrates in displacement mode, with an amplitude greater than the flexural vibration of the touch pad, and controlling the piezoelectric element to resonate at a frequency that enhances tactile feedback, reducing the amplitude disparity and improving tactile consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the touch pad is supported rigidly to maintain structural stability, then the structural stability is improved, but the vibration amplitude becomes insufficient and tactile sensation varies by position
Solution Approach 1:
The support section is designed as a flexible elastic body that can undergo displacement vibration. This flexible support structure allows the touch pad to vibrate with sufficient amplitude while maintaining structural stability, resolving the contradiction between rigid support and vibration capability
Solution Approach 2:
The support section is specifically designed to vibrate in displacement mode with amplitude greater than the flexural vibration of the touch pad. This mechanical vibration approach ensures uniform tactile sensation across different touch positions while maintaining overall structural stability
2Ease of operation
If the support section vibrates with large amplitude to enhance tactile feedback, then the tactile feedback is improved, but the structural stability deteriorates
Solution Approach 1:
The elastic body support section provides flexibility for large amplitude displacement vibration that enhances tactile feedback, while its elastic properties inherently maintain structural stability. The material and geometry are designed to allow controlled vibration without compromising overall structure
Solution Approach 2:
The support section's elastic modulus, density, and geometric parameters are optimized to achieve the desired vibration amplitude for improved tactile feedback while maintaining structural stability. By adjusting these parameters, the system achieves both large vibration amplitude and structural integrity
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 reduces the difference in tactile sensation across touch positions, providing a more uniform and enhanced user experience by amplifying displacement vibration amplitude and aligning resonance frequencies for improved tactile feedback.
Implementation Method 1
a piezoelectric element 13 attached on the opposite side of the touch operation surface of the touch pad 11 to be touched by the user
Implementation Method 2
the support section 12 deforms to vibrate in displacement vibration
Data Source
AI summary
An electronic apparatus 10 includes a touch pad 11 for accepting a touch operation of a user, a support section 12 for supporting the touch pad 11, and a vibrating section 13 attached to the touch pad 11 for flexurally deforming the touch pad 11. As flexural vibration of the touch pad 11 is transmitted to the support section 12, the support section 12 deforms to vibrate in displacement vibration. An amplitude of the displacement vibration of the support section 12 is greater than an amplitude of the flexural vibration of the touch pad 11.