A simplified control panel for a beverage machine
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Solution Overview
Problem
Existing beverage preparation machines face difficulties in user-friendly selection of parameter values, particularly in distinguishing selected marks from non-selected ones, which can lead to user confusion without increasing the device's cost.
Innovation Solution
The implementation of a polarization modifying layer that shifts the phase of polarized light, allowing the selected mark to be clearly differentiated through illumination or obscuration based on the position of the mobile selection element, enhancing visual clarity without significant price increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a mobile selection element is used to select parameter values by positioning it in visual association with marks, then the device complexity and cost are reduced, but the selected mark becomes difficult to distinguish from non-selected marks
Solution Approach 1:
The patent applies optical property changes by introducing a polarization layer and polarization modifying layer that alter the visual appearance of marks based on the position of the mobile selection element. When the mobile element covers a mark, the polarization modifying layer (such as a wave plate) changes the polarization state of light passing through, causing the mark to appear differently (e.g., illuminated vs. obscured) to the user. This provides clear visual feedback without requiring complex electronic displays or additional costly components.
2Loss of information
If a sophisticated touchscreen HMI is used, then the viewing and selection of parameter values is improved, but the device cost significantly increases
Solution Approach 1:
The patent replaces complex electronic HMI systems (touchscreens, LEDs, displays) with an optical system based on polarization properties. The selection device uses layers with specific optical characteristics (polarization layer, polarization modifying layer with wave plates) to provide visual feedback about the selected parameter value. This mechanical/optical approach achieves clear visual indication while maintaining simplicity and low cost, avoiding the need for sophisticated electronic interfaces.
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 improves user-friendliness by clearly indicating selected parameter values, independent of ambient luminosity, thereby simplifying the selection process without increasing the device's cost.
Implementation Method 1
a polarization modifying layer (23a, 23b) able to modify the polarization of the polarised light such that the visual aspect of a selected mark is modified
Implementation Method 2
the polarization modifying layer able to modify the polarization of the polarised light comprises at least a wave-plate for shifting the phase between two perpendicular components of the polarised light
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A selection device (2) for a beverage preparation machine (1), comprises a fixed selection element (3) and a mobile selection element (4), the fixed selection element (3) comprising a set of marks (33) each corresponding to a parameter value, the mobile selection element (4) being movable in relation to the set of marks (33) for selecting a parameter value by positioning the mobile selection element (4) in visual association with a selected mark (33x). The selection device (2) further comprises a light-sending layer which is disposed in the fixed selection device (3), a polarization layer for polarizing said sent light, and at least one polarization modifying layer able to modify the polarization of the polarised light such that the visual aspect of a selected mark (33x) is modified when the mobile selection element (4) is positioned in visual association with the selected mark (33x), the polarization modifying layer being disposed in superposition relative to the polarization layer and relative to the selected mark (33x).