Touch Device Buffer Layer Isolates Restoration Element to Reduce Click Noise
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Solution Overview
Problem
Touch devices in notebook computers generate noise during use, which detracts from the user experience, and softer materials to reduce noise compromise click ratio and tactile feedback.
Innovation Solution
A touch device design featuring a cover plate, circuit board, restoration element, bracket, conductive pad, and buffer layer, where the buffer layer reduces noise and provides favorable tactile feedback by isolating the restoration element from the conductive switch, allowing the conductive pad to trigger the switch without noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a metal restoration element is used under the touchpad, then the click ratio and tactile feedback are improved, but click noise is generated during pressing
Solution Approach 1:
The patent divides the restoration element system into separate functional components: a metal restoration element for tactile feedback and a conductive pad for signal transmission. This segmentation allows each component to perform its specific function without generating noise, as the conductive pad contacts the switch directly while the restoration element remains isolated by the buffer layer.
Solution Approach 2:
The buffer layer serves as an intermediary between the metal restoration element and the conductive pad/circuit board. This intermediate layer electrically isolates the restoration element from the switching components, preventing noise generation while still allowing the restoration element to provide tactile feedback through mechanical restoration.
2Object-generated harmful factors
If a softer or less rigid material is selected as the restoration element, then noise is reduced, but the click ratio becomes excessively low and tactile feedback is compromised
Solution Approach 1:
The patent separates the noise-generating function from the tactile feedback function by using distinct components: the conductive pad handles electrical switching without noise, while the metal restoration element provides tactile feedback. The buffer layer ensures the restoration element does not contact the circuit board, preventing noise while maintaining its mechanical properties.
Solution Approach 2:
The buffer layer acts as a mediator that prevents direct contact between the restoration element and the circuit board, eliminating noise generation pathways. This allows the restoration element to maintain its optimal rigidity for tactile feedback without compromising noise performance.
3Reliability
If the restoration element directly contacts the conductive switch, then the clicking function is triggered effectively, but noise is generated during pressing
Solution Approach 1:
The patent segments the switching mechanism into two independent parts: the conductive pad on the bracket that contacts the conductive switch for reliable signal transmission, and the buffer layer that electrically isolates the restoration element. This segmentation ensures effective clicking functionality through the conductive pad-switch contact while preventing noise from the restoration element.
Solution Approach 2:
The buffer layer serves as an electrical intermediary that prevents the restoration element from contacting the conductive switch. This intermediary layer eliminates the noise generation pathway while the conductive pad maintains direct contact with the switch for reliable button-clicking functionality.
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 reduced noise during pressing while maintaining favorable tactile feedback, enhancing the user experience by ensuring effective button-clicking functionality without excessive noise.
Implementation Method 1
the buffer layer reduces noise and provides favorable tactile feedback by isolating the restoration element from the conductive switch
Data Source
AI summary
The invention provides a touch device and an input module. The touch device includes a cover plate, a circuit board, a restoration element, a bracket, at least one conductive pad, and a buffer layer. The circuit board is disposed on one side of the cover plate and has a first surface facing the cover plate, a second surface opposite to the first surface, and at least one conductive switch disposed on the second surface. The bracket is disposed on the second surface of the circuit board. The restoration element is disposed on the second surface, and the conductive pad is disposed on the bracket and located between the bracket and the circuit board. The conductive pad and the restoration element are separately disposed, and the conductive pad corresponds to the conductive switch. The buffer layer is disposed between the second surface and the restoration element.