Standing-Wave Haptic Display With Flexible Isolation
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Solution Overview
Problem
Existing haptic feedback systems experience high-frequency noise and heat generation due to friction between vibrating components, which degrade the user experience by reducing vibration amplitude and intensity.
Innovation Solution
Incorporation of isolation structures with low Young's modulus, such as PDMS or rubber, to maintain a distance between vibrating modules and frames, preventing friction-induced noise and heat while preserving vibration amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the touch module is fixed directly to the module outer frame, then the structural stability is improved, but friction-induced high-frequency noise and heat generation occur during vibration
Solution Approach 1:
The patent introduces an isolation structure as an intermediary element between the touch module and the module outer frame. This isolation structure prevents direct contact and friction between the vibrating touch module and the stationary frame, thereby eliminating friction-induced noise and heat while maintaining structural stability through the isolating yet supportive connection.
2Device complexity
If the display module is fixed directly to the touch module, then the assembly compactness is improved, but vibration amplitude is reduced due to friction
Solution Approach 1:
The patent introduces an isolation structure as an intermediary element between the touch module and the module outer frame. This isolation structure prevents direct contact and friction between the vibrating touch module and the stationary frame, thereby eliminating friction-induced noise and heat while maintaining structural stability through the isolating yet supportive connection.
3Manufacturing precision
If rigid fixing structures are used to secure the touch module, then the positioning precision is improved, but vibration amplitude and haptic perception intensity are reduced
Solution Approach 1:
The patent changes the mechanical parameters of the fixing structure by using an isolation structure with specific material properties (Young's modulus between 0.01-10 MPa). This parameter change allows the structure to provide sufficient positioning precision while maintaining the flexibility needed to preserve vibration amplitude and haptic perception intensity.
Solution Approach 2:
The patent employs a flexible isolation structure made of materials with low Young's modulus (0.01-10 MPa), such as rubber or foam. This flexible structure provides the necessary positioning precision while allowing the touch module to vibrate freely, thereby maintaining vibration amplitude and haptic perception intensity without the constraints of rigid fixing.
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
Ensures effective haptic perception intensity by minimizing noise and heat interference, thus enhancing user experience.
Implementation Method 1
the haptic sensor is configured to generate a standing wave on a surface of the touch module during operation
Implementation Method 2
In the physical sense, the surface haptic sense is the effect of the surface roughness of the object on the surface of the skin (fingertip), and different friction forces are formed due to different surface structures. Therefore, different haptic/tactile simulations may be realized by controlling the surface friction forces.
Data Source
AI summary
A display device is disclosed. The display device includes a module outer frame, including a display opening window, where an accommodation space is formed inside the module outer frame; a display module, fixed in the accommodating space, where a light emitting side of the display module faces the display opening window; a touch module, fixed between the display module and the display opening window, where the touch module includes a haptic sensor configured to generate a standing wave on a surface of the touch module during operation; a first isolation structure, arranged between the touch module and the module outer frame, where the first isolation structure is configured to isolate the touch module from the module outer frame; and a second isolation structure, arranged between the display module and the touch module, where the second isolation structure is configured to isolate the display module from the touch module.