Hidden Capacitive Touch Control Behind Opaque Surfaces
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Solution Overview
Problem
Existing smart home control elements are vulnerable to breakage and visually intrusive, especially in humid environments like kitchens, and often require costly retrofitting of surfaces for touch-sensitive controls, which can be activated unintentionally.
Innovation Solution
A touch-sensitive control element is mounted behind a permanently opaque surface, using capacitive touch sensors to detect touches and communicate with a central data processing system, providing feedback through audible, tactile, or optical signals to prevent unintentional activation and minimize surface disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control elements are mounted on exposed surfaces for easy access, then ease of operation is improved, but vulnerability to breakage and visual intrusiveness increases
Solution Approach 1:
The control element is nested behind an opaque surface (worktop, wall panel, or furniture surface), with touch sensors positioned to detect touches through the surface. This nesting approach provides protection against breakage while maintaining operational accessibility, as users can still interact with the control element through the opaque surface without it being visually intrusive or physically exposed.
2Ease of operation
If glass surfaces are used for touch control, then ease of operation is improved, but maintenance requirements and breakage risk increase
Solution Approach 1:
The control element can be mounted behind various types of opaque surfaces (worktops, wall panels, furniture surfaces) without requiring surface-specific customization. This universal mounting approach allows the same control element design to be used across different applications and materials, reducing manufacturing complexity and retrofitting costs while maintaining touch control functionality.
3Measurement precision
If touch sensors are mounted directly on exposed surfaces, then touch detection precision is improved, but susceptibility to water droplets and false activation increases
Solution Approach 1:
The opaque surface acts as an intermediary between the user's touch and the touch sensors. The sensors detect touches through the opaque surface, which provides protection against water droplets and other environmental factors that would otherwise cause false activations. This intermediary approach maintains touch detection precision while eliminating the harmful effects of direct exposure to moisture.
4Speed
If control elements are always active for immediate response, then response speed is improved, but unwanted activation increases
Solution Approach 1:
The control element employs a locked state that prevents activation until a specific unlocking sequence is performed. This preliminary anti-action measures (blocking default activation, requiring specific sequence) prevents unwanted activations while maintaining fast response time once unlocked, as the system is ready to respond immediately after the unlocking sequence is completed.
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
This solution enhances the robustness and usability of smart home controls by reducing the risk of breakage, allowing operation in damp environments, and enabling cost-effective installation without surface modifications, while ensuring targeted and secure activation.
Implementation Method 1
capacitive touch sensors which detect touches of users of the permanently opaque surface through it
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to the use of a touch-sensitive control element (1) in a system for controlling a smart home application and/or devices of building automation systems, comprising at least one touch-sensitive control element (1), a central data processing system, and decentralized devices of the building automation system, which are controlled or regulated by the data processing system, wherein the control element (1) is mounted behind a permanently opaque surface of a building wall, a piece of furniture, a kitchen, or a worktop and has capacitive touch sensors (2, 3), wherein the control element (1) communicates with the central data processing system, which, based on the detected touches and the control instructions stored therein, controls or regulates at least one decentralized device of the building automation system.thereby preventing unintentional and/or unnoticed activation of the touch-sensitive control element (1).