Appliance LED Console Reflector Layout for Directional UI Lighting
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Solution Overview
Problem
Home appliances with user-selectable features often lack effective illumination systems that provide clear and intuitive feedback to users, making it difficult to select and monitor operational parameters.
Innovation Solution
A console assembly with a light transmissive indicia assembly, a printed circuit assembly, and a light reflector system that directs illumination from LEDs through openings to provide controlled and directional lighting for user interface elements, enhancing visibility of parameter selectors and status displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional illumination systems are used in appliance consoles, then the structure is simple, but the illumination effectiveness and user feedback clarity are insufficient
Solution Approach 1:
The illumination system is segmented into multiple functional components: LED light sources, light reflectors with specific geometric shapes, light transmissive indicia assemblies, and console shells with strategically positioned openings. Each component performs a specific optical function to collectively achieve effective illumination while maintaining manageable structural complexity
Solution Approach 2:
Light reflectors serve as intermediary elements between the LED light sources and the user interface. These reflectors redirect and concentrate light toward specific areas, acting as mediators that enhance illumination effectiveness without requiring direct line-of-sight between the light source and the illuminated elements
2Ease of operation
If LEDs are mounted on the PCA, then the electrical connection is integrated, but the light directionality and illumination control are poor
Solution Approach 1:
The light reflectors are pre-positioned and integrated with the PCA assembly before final installation. This preliminary arrangement ensures that when LEDs are mounted on the PCA, the reflectors are already in place to direct light in the desired directions, providing built-in illumination control without requiring additional complex control mechanisms
Solution Approach 2:
Different regions of the light reflectors have different geometric properties optimized for specific functions: some areas are designed to redirect light upward toward the indicia, while other areas direct light forward through console openings. This local optimization of reflector geometry provides directional control tailored to specific illumination needs
3Illumination intensity
If light is emitted directly from LEDs without reflection, then the system is simple, but the light distribution and visibility are insufficient
Solution Approach 1:
The light reflectors incorporate curved and geometric surfaces that are optimized to redirect light in specific patterns. These curved surfaces efficiently distribute light across multiple directions, improving light distribution and visibility of the user interface elements without requiring complex optical systems with multiple lenses or mirrors
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 provides clear and intuitive illumination for user-selectable features, improving user interaction by ensuring that light from LEDs is effectively reflected and transmitted through the console assembly, enhancing the usability of appliance interfaces.
Implementation Method 1
a light reflector disposed adjacent to the second side of the PCA and the at least one LED, wherein light from the LED is reflected by the light reflector through the at least one opening of the PCA and through the indicia assembly
Data Source
AI summary
A console assembly for an appliance has a light transmissive indicia assembly having at least one indicator and one operator control, a printed circuit assembly (PCA) mounted to the indicia assembly with touch circuit and light emitting diodes (LEDs) mounted to both sides of the PCA, and a light reflector disposed adjacent to the PCA and the LEDs.