Touch Module Isolation Structure for Quiet Haptic Display Vibration
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Solution Overview
Problem
Existing haptic feedback systems face issues with high-frequency noise and reduced vibration amplitude due to friction between the display module and the module outer frame, which affect the user experience.
Innovation Solution
Incorporation of isolation structures with a Young's modulus less than 0.1 MPa, such as PDMS or rubber, to isolate the touch module from the module outer frame and the display module, maintaining a distance to prevent friction-induced noise and heat while ensuring vibration amplitude is not significantly suppressed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the touch module is directly fixed to the module outer frame and display module, then the structural stability is improved, but high-frequency noise and heat are generated due to friction during vibration
Solution Approach 1:
The patent introduces isolation structures (first isolation structure between touch module and module outer frame, second isolation structure between touch module and display module) as intermediary elements. These isolation structures have Young's modulus less than 0.1 MPa, making them soft and flexible materials that prevent direct contact and friction between rigid components, thereby eliminating high-frequency noise and heat generation while maintaining structural stability.
2Object-affected harmful factors
If isolation structures with low Young's modulus are introduced to reduce friction noise, then high-frequency noise is reduced, but the structural support may be weakened
Solution Approach 1:
The patent applies local quality by using soft isolation structures only at specific locations where friction occurs (between touch module and module outer frame, and between touch module and display module), while other parts of the structure maintain their original rigid properties. This localized application of soft materials prevents noise generation without compromising the overall structural support strength.
Solution Approach 2:
The patent employs composite material strategy by combining soft isolation materials (with Young's modulus less than 0.1 MPa) with rigid structural components. The isolation structures are made of materials such as rubber or foam, which are fundamentally different in properties from the rigid module frames, creating a composite system that simultaneously provides both soft isolation for noise reduction and rigid support for structural strength.
3Object-affected harmful factors
If the touch module is isolated from the module outer frame and display module, then friction-induced noise is reduced, but the haptic vibration transmission may be affected
Solution Approach 1:
The patent changes the physical parameter of the isolation structures by selecting materials with specifically controlled Young's modulus less than 0.1 MPa. This parameter selection is critical: the materials are soft enough to prevent friction noise but not so soft as to completely dampen the haptic vibrations. The isolation structures allow low-frequency haptic vibrations to pass through while blocking high-frequency friction noise.
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 high-frequency noise and heat, enhancing the haptic perception intensity without reducing the vibration amplitude, thereby improving the overall 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
a Young's modulus of each of the first isolation structure and the second isolation structure is less than 0.1 MPa
Data Source
Figure 1~3A
Figure 3B~3C
Figure 3D
AI summary
The present disclosure provides a display device. In order to prevent a display module and a module outer frame from generating high-frequency noise due to friction when a touch module vibrates, a first isolation structure is used to isolate the touch module and the module outer frame, such that a certain distance is maintained between the touch module and the module outer frame. In addition, a second isolation structure is used to isolate the display module and the touch module, such that a certain distance is maintained between the display module and the touch module, thereby preventing high-frequency noise and heat energy from being generated due to friction between the touch module and the display module and module outer frame and thus affecting user experience. Moreover, the first isolation structure and the second isolation structure do not completely fix the touch module, so the vibration of the touch module when a haptic sensor is working will not be greatly suppressed, that is, the strength of haptic sensing may be effectively guaranteed without reducing the vibration amplitude of the touch module.