Touch Display Panel Layout to Prevent Capacitive Crosstalk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing operating and display devices for domestic appliances suffer from crosstalk issues between capacitive switches, leading to unintended function activation and require complex evaluation systems for accurate parameter setting, making operation cumbersome and prone to errors.
Innovation Solution
A touch-sensitive operating and display device with capacitive operating means, where function symbols are backlit and selected by directly tapping on a touch-sensitive actuation surface, eliminating the need for separate operating elements and allowing intuitive parameter setting without mechanical movement, thus preventing contamination and simplifying operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate operating elements are used below the display, then parameter setting is possible, but the device complexity increases and operation becomes cumbersome
Solution Approach 1:
The patent combines the display function and operating function into a single integrated unit. The display symbols serve dual purposes: they display parameter values and simultaneously function as touch-sensitive operating elements. This merging eliminates the need for separate operating elements below the display, reducing device complexity while maintaining ease of operation.
Solution Approach 2:
The display symbols are designed to perform multiple functions: they serve as visual indicators for parameter values and as capacitive touch sensors for input operations. This multi-functionality allows the same component to replace both the display element and the operating element, simplifying the overall device structure.
2Reliability
If capacitive switches with coupling elements are used, then operating elements can be electrically connected, but crosstalk occurs between sensor electrodes causing unintended function activation
Solution Approach 1:
The patent eliminates the coupling element from the system by using a different electrical connection approach. The capacitive sensor electrodes are connected to the control device through conductive connections that do not require physical coupling elements, thereby removing the source of crosstalk while maintaining reliable electrical connectivity.
Solution Approach 2:
The patent introduces a control device as an intermediary between the capacitive sensor electrodes and the final control signals. This control device processes the signals from multiple sensor electrodes independently, preventing crosstalk from causing unintended function activation while maintaining accurate parameter setting.
3Ease of operation
If the operating panel has through-openings for operating elements, then capacitive switches can be accessed, but contamination can enter the appliance
Solution Approach 1:
By merging the display symbols with the capacitive touch sensors, the invention allows the entire display surface to function as the operating interface. This eliminates the need for through-openings in the operating panel, as users can touch the display symbols directly through the panel surface, maintaining ease of operation while preventing contamination entry.
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 solution enhances user-friendliness, reduces contamination risks, and simplifies parameter setting by enabling direct selection of function symbols, improving the operational efficiency and cleanliness of domestic appliances.
Implementation Method 1
a light conductor part (24, 34) for conducting light
Implementation Method 2
at least a part of the function symbols (13, 14, 15) can be assigned a separate capacitive sensor electrode (44)
Data Source
AI summary
The invention relates to an operating and display device (11) for a domestic appliance, comprising operating means for setting at least one parameter of an operating process of the domestic appliance, a light conductor part (24, 34) for conducting light, a plurality of function symbols (13, 14, 15), which each symbolize a respective selectable value of the parameter, and a lighting device (47) for backlighting the function symbols (13, 14, 15), by means of which lighting device the function symbol (13, 14, 15) associated with the presently selected value of the parameter can be optically distinguished from the other function symbols (13, 14, 15), wherein the operating means are designed as touch-sensitive operating means and have a touch-sensitive actuation surface (16), which is arranged such as to overlap with the function symbols (13, 14, 15) and thus the value of the parameter associated with one of the function symbols (13, 14, 15) can be selected by touching the actuation surface (16) in an overlap area (17) that overlaps with one of the function symbols (13, 14, 15).