Cooktop Control Identification Using Touch-Activated Element Lighting
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Solution Overview
Problem
Users of modern cook-top appliances often struggle to identify which heating element is associated with a particular control, leading to confusion and incorrect operation, especially when knobs are on a vertical panel or multiple elements are positioned randomly.
Innovation Solution
A system that includes a sensor to detect the presence of a user near a control element, activating a visual indicator, such as a light, to clearly identify the associated heating element, using capacitive touch sensors or other detection techniques like acoustical or optical sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple heating elements are positioned randomly or knobs are placed on a vertical panel, then the appliance design flexibility is improved, but the ease of identifying which control corresponds to which heating element deteriorates
Solution Approach 1:
The system provides immediate visual feedback by illuminating the heating element corresponding to the touched control element. When a user touches a control, the microprocessor detects the touch and activates an indicator light at the corresponding heating element location, creating a direct feedback loop that confirms the control-heating element relationship.
Solution Approach 2:
The patent introduces an intermediary visual indicator system (LED lights or display elements) that mediates between the control elements and heating elements. This intermediary provides clear visual correspondence without requiring direct line of sight between controls and heating elements, solving the identification problem in random or vertical panel configurations.
2Ease of operation
If indicia are provided on knobs and adjacent surfaces to identify heating elements, then the ease of identification is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces static mechanical identification methods (indicia, labels, color-coding on knobs) with an active electronic identification system. Instead of relying on visual labels that require user attention and interpretation, the system uses electronic sensors and illuminated indicators to dynamically indicate correspondence, reducing the need for complex labeling schemes.
Solution Approach 2:
The system enables self-service identification where the appliance automatically indicates which heating element corresponds to which control without requiring external labeling. The control elements and heating elements self-identify through the touch-detection and illumination system, eliminating the need for manually applied indicia.
3Device complexity
If users must examine indicia to identify heating elements, then no additional system is needed, but the loss of time and potential for user error increase
Solution Approach 1:
The system performs preliminary action by proactively illuminating the corresponding heating element indicator as soon as a user touches a control element. This immediate visual confirmation eliminates the time users would otherwise spend searching for or interpreting indicia, providing instant identification of the control-heating element relationship.
Solution Approach 2:
The immediate visual feedback system eliminates delays in identification. When a user touches a control, the corresponding heating element indicator illuminates instantly, providing real-time confirmation of the relationship without requiring the user to search for or interpret static labels, thereby reducing time loss and potential errors.
4Device complexity
If no identification system is provided, then the device complexity is minimized, but the reliability of correct operation deteriorates
Solution Approach 1:
The visual feedback system significantly improves operational reliability by providing clear, unambiguous indication of which heating element corresponds to which control. This eliminates guesswork and prevents incorrect operation, ensuring users activate the intended heating element with high confidence.
Solution Approach 2:
The intermediary visual indicator system acts as a reliable mediator between user input and heating element activation. By providing clear visual correspondence, this intermediary ensures accurate control-heating element pairing, dramatically improving operational reliability without requiring complex mechanical linkages or labeling systems.
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
Provides a clear and convenient method for users to positively identify which heating element is controlled by a particular knob, reducing confusion and improving operational safety by providing a visible signal when a user approaches or touches a control.
Implementation Method 1
using capacitive touch sensors or other detection techniques like acoustical or optical sensors
Implementation Method 2
activating a visual indicator, such as a light, to clearly identify the associated heating element
Data Source
AI summary
A method and apparatus are provided for determining which heating element on a cooking appliance is associated with a particular heating element control. More particularly, when a user of the appliance touches a control on the cooking appliance and/or comes in close proximity to such control, a visual identification of which heating element is associated with such control is provided. The visual identification can be e.g., a light that illuminates the associated heating element or a visible display that otherwise indicates the associated heating element.