Touch Switch Duration Detection for Multi-Function Appliance Control
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Solution Overview
Problem
Existing electrical devices with multiple control elements, such as hobs and household appliances, face challenges in providing an intuitive and safe operating method that simplifies user interaction while allowing for additional functions without requiring additional operating elements.
Innovation Solution
Implementing a touch switch or proximity switch as the on/off switch, where a finger can activate or deactivate the device based on duration of contact, with a switching limit value between 0.5 to 5 seconds, allowing for additional functions or sub-menus to be accessed by brief actuation, and ensuring safety through immediate shutdown upon prolonged contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control elements are provided for additional functions, then functionality is improved, but device complexity increases
Solution Approach 1:
The on/off switch is designed to perform multiple functions: normal switching operation and activation of additional functions or sub-menus. By detecting the duration of the switching action, a single control element accomplishes what would traditionally require multiple separate controls, thereby reducing device complexity while maintaining versatility
2Adaptability or versatility
If additional control elements are added for sub-menus, then adaptability is improved, but ease of operation deteriorates
Solution Approach 1:
The control for accessing additional functions is merged with the existing on/off switch by utilizing duration-based detection. Users access sub-menus by holding the switch for a specific duration, combining the switching function and menu access function into a single intuitive gesture, thereby improving ease of operation
3Ease of operation
If touch switch or proximity switch is used, then ease of operation is improved, but reliability may worsen due to accidental activation
Solution Approach 1:
The switching threshold duration parameter dynamically distinguishes between intentional and accidental activations. By requiring a minimum holding duration to activate additional functions, the system adapts to user intent, maintaining ease of operation for deliberate actions while filtering out accidental touches that do not meet the duration threshold
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
Enables easy and comfortable operation of electrical devices by eliminating the need for additional control elements, providing a secure and efficient way to switch between normal operation and additional functions, while ensuring safety through distinct auditory and visual signals.
Implementation Method 1
which are based on a capacitive or inductive input principle, or possibly also on an optical one, and detect the placement of a finger or a light press
Implementation Method 2
which are based on a capacitive or inductive input principle, or possibly also on an optical one, and detect the placement of a finger or a light press
Data Source
Figure 1~2
AI summary
In a method for operating an electrical device with a control device with a number of control elements, one of the control elements being an on/off switch or forming one and being a touch switch or being operable by means of a slight application force, starting from an on state of the Electrical device switched off or put into the off state by pressing the on / off switch for a period above a switching limit value, in particular immediately after exceeding this switching limit value. Starting from the on state of the electrical device, an additional function or a sub-menu of the electrical device can be operated by actuating this on/off switch for a period below this switching limit value.