Virtual Haptic Assembly Cushioning Friction Noise
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Solution Overview
Problem
Existing virtual haptic systems face challenges in reducing noise generated by friction between the actuator and other components during vibration, which affects the haptic experience.
Innovation Solution
A virtual haptic assembly is designed with a display screen, an actuator including a touch panel and a piezoelectric sensor, and a first cushion fixed between the display screen and the actuator. The first cushion creates a distance between the actuator and the display screen, reducing friction noise and enhancing user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the actuator is fixed directly to the display screen, then the structural stability is improved, but friction noise increases during vibration
Solution Approach 1:
A cushion is introduced as an intermediary component between the actuator and the display screen. This cushion serves as a mediator that prevents direct contact and friction between the vibrating actuator and the stationary display screen, thereby eliminating friction noise while maintaining structural stability through proper mechanical coupling.
Solution Approach 2:
The cushion is positioned in advance between the actuator and display screen to prevent friction noise before it occurs. This prior cushioning approach ensures that when the actuator vibrates during operation, the cushion already exists to absorb and isolate the friction forces, preventing noise generation at its source.
2Object-generated harmful factors
If the actuator is separated from the display screen, then friction noise is reduced, but the haptic feedback effectiveness deteriorates
Solution Approach 1:
The cushion acts as an intermediary that transmits vibration forces from the actuator to the display screen while preventing direct friction contact. This allows the haptic feedback to remain effective through proper force transmission, while simultaneously eliminating friction noise through the cushion's isolating properties.
Solution Approach 2:
The cushion changes the physical parameters of the interface between the actuator and display screen by introducing elasticity and damping characteristics. This modifies the contact properties to allow vibration transmission while preventing friction, thereby maintaining haptic feedback effectiveness without noise.
3Speed
If the cushion is positioned in the non-touch area, then the vibration freedom is improved, but the structural support decreases
Solution Approach 1:
The cushion is segmented or positioned in specific non-touch areas where it provides vibration isolation without interfering with the touch-sensitive regions. This segmentation allows the cushion to fulfill its vibration freedom function in specific zones while maintaining structural support in other critical areas through strategic positioning.
Solution Approach 2:
The cushion provides different functional qualities in different locations: in the non-touch area, it provides vibration freedom and noise reduction, while in other areas it provides structural support. This local differentiation of functional properties allows simultaneous optimization of both vibration freedom and structural support.
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 effectively reduces noise generated by friction, allowing for improved haptic feedback without constraining the vibration of the actuator, thus enhancing the overall haptic experience.
Implementation Method 1
the piezoelectric sensor is configured to drive the touch panel to vibrate together to form haptic feedback
Data Source
AI summary
Disclosed is a virtual haptic assembly and a virtual haptic system. The virtual haptic assembly includes a display screen; an actuator on a light emitting side of the display screen, where the actuator includes a touch panel and a piezoelectric sensor, the touch panel includes a touch area and a non-touch area on at least one side of the touch area, the piezoelectric sensor is located on one side of the touch panel facing the display screen, and the piezoelectric sensor is configured to drive the touch panel to vibrate to form haptic feedback in response to interactive information of a user; and a first cushion, fixed between the display screen and the actuator, where an orthographic projection of the first cushion on the touch panel is located in the non-touch area.