Illuminated Control Layer Structure for Sharp Light Boundaries
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Solution Overview
Problem
Household appliances with multiple illuminated controls face issues of mutual interference and blurred edges in their illuminated displays due to uncontrolled light emission and lack of clear demarcation.
Innovation Solution
A layered arrangement comprising a light-blocking layer with cutouts, a sensor layer, and optionally a diffuser layer to contain and define the illumination within a control element, using materials like PET and conductive metals for precise light control and sensor functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple illuminated controls are used, then the functionality of the control panel is enhanced, but mutual interference between illuminated areas occurs and edges become blurred
Solution Approach 1:
The control panel is divided into separate light chambers for different control elements. Each light chamber is independently enclosed with light-blocking walls, physically segmenting the illumination paths. This segmentation prevents light from one control element from interfering with adjacent control elements, while maintaining clear boundary definitions for each illuminated area.
Solution Approach 2:
Light-blocking layers with precise cutouts are introduced as intermediary elements between the light sources and the control panel surface. These intermediaries restrict light emission to specific areas defined by the cutouts, preventing light leakage and ensuring sharp boundaries between illuminated and non-illuminated regions.
2Illumination intensity
If light emission is extended to cover larger areas, then the visibility of control elements is improved, but light leakage and interference increase
Solution Approach 1:
The light-blocking layer features locally optimized properties with precisely positioned cutouts that match the required illumination patterns. Each cutout is strategically placed to allow light through only where needed for specific control elements, while surrounding areas remain light-blocking. This local quality control ensures high visibility within illuminated areas while preventing light leakage to adjacent regions.
3Manufacturing precision
If additional layers are added to control light emission, then the precision of illumination boundaries is improved, but the device complexity increases
Solution Approach 1:
The light-blocking layer serves multiple functions simultaneously: it defines illumination boundaries through its cutout pattern, acts as a structural support for mounting light sources, and provides mechanical attachment for the control panel components. By combining these functions into a single multi-functional layer, the design achieves precise boundary definition without proportionally increasing overall device complexity.
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 ensures clear demarcation and efficient illumination of control elements by preventing light leakage and interference, allowing for well-defined displays without the need for additional printed layers.
Implementation Method 1
The light-blocking layer ensures that light from the light chamber can only reach the user interface through the cutout
Implementation Method 2
one or more separators and/or reflectors that block light in a direction parallel to the one or more layers of the assembly
Data Source
Figure 1a~2a
Figure 2b
AI summary
A layer arrangement (200) for an operating element (110) is described. The layer arrangement (200) comprises a luminaire element (217) configured to illuminate a light chamber (216) of the layer arrangement (200), and a light-blocking layer (204) covering the light chamber (216) with a recess (214). Furthermore, the layer arrangement (200) comprises a sensor layer (201) covering the recess (214) of the light-blocking layer (204), wherein the sensor layer (201) overlaps the light-blocking layer (204) at the edge of the recess (214), such that an overlapping area (202) is formed at the edge of the recess (214) in which the light-blocking layer (204) and the sensor layer overlap.