Lever-Driven Tactile Feedback Module for High-Mass Touch Screens
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Solution Overview
Problem
Current technologies face difficulties in realizing effective tactile feedback on high-mass touch modules, such as those used in cars, high-speed railways, and industrial devices, due to challenges in amplifying displacement and reducing power consumption.
Innovation Solution
A tactile-feedback module design utilizing a lever mechanism that amplifies the displacement of a touch substrate by configuring the lever's fulcrum and resistance end distances, combined with a flexible hinge system to reduce power input and enhance vibration amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct drive structure is used to vibrate the touch substrate, then the structure is simple, but the displacement amplitude is insufficient for high-mass touch modules
Solution Approach 1:
A lever mechanism is introduced as an intermediary between the actuator element and the touch substrate. The lever amplifies the displacement from the actuator element to achieve larger vibration amplitude on the touch substrate surface, resolving the contradiction between structural simplicity and sufficient displacement amplitude.
Solution Approach 2:
The lever mechanism changes the displacement parameter through mechanical advantage. By positioning the fulcrum appropriately, the system transforms small actuator displacement into large touch substrate displacement, achieving the required vibration amplitude for high-mass touch modules.
2Length of moving object
If a lever mechanism with long lever arm is used to amplify displacement, then the vibration amplitude increases, but the power consumption increases
Solution Approach 1:
The system optimizes the lever arm ratio to achieve the minimum necessary mechanical advantage for the required displacement amplification. By carefully selecting the fulcrum position and lever dimensions, the power consumption is minimized while still achieving sufficient vibration amplitude for high-mass touch modules.
3Stability of the object's composition
If the actuator element is positioned close to the touch substrate center, then the vibration is evenly distributed, but the lever mechanism becomes more complex
Solution Approach 1:
The lever mechanism is designed with asymmetric fulcrum positioning and varying lever arm lengths to optimize the mechanical advantage distribution. This asymmetric design allows the actuator to be positioned centrally for uniform vibration while maintaining a relatively simple lever structure through strategic asymmetry in the lever geometry.
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 design achieves efficient tactile feedback on high-mass touch modules by reducing power consumption and increasing vibration amplitude, enhancing user experience and reliability.
Implementation Method 1
an actuator element disposed at one side of the touch substrate away from the touch surface and configured to generate vibration in a first direction, wherein the first direction intersects with the touch surface
Implementation Method 2
a lever located between the actuator element and the touch substrate, wherein a power end of the lever is connected to the actuator element, a resistance end of the lever is connected to the touch substrate, and the lever is configured to, under driving of the actuator element, drive the touch substrate to vibrate
Data Source
AI summary
A tactile-feedback module and an electronic device are provided, which relates to the technical field of electronics. The tactile-feedback module includes: a touch substrate having a touch surface; an actuator element disposed at one side of the touch substrate away from the touch surface and configured to generate vibration in a first direction, wherein the first direction intersects with the touch surface; and a lever located between the actuator element and the touch substrate, wherein a power end of the lever is connected to the actuator element, a resistance end of the lever is connected to the touch substrate, in a stationary state of the actuator element, a plane where the lever is located is parallel to the touch surface, and the lever is configured to, under driving of the actuator element, drive the touch substrate to vibrate.