Variable Deflection Unit for Homogeneous Vehicle Interior Illumination
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Solution Overview
Problem
Conventional point light sources, such as LEDs or LED arrays, often produce non-homogeneous brightness distributions on target areas, making it difficult to achieve uniform illumination, especially when illuminating different shaped or sized areas at varying distances.
Innovation Solution
The use of a variable deflection unit within the illumination device, which converts the light cone into a second cone with adjustable form and intensity distribution, allowing for homogenous brightness distribution on target areas, even when using structurally identical illumination devices for different areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional point light sources are used, then the device complexity is reduced, but the brightness distribution homogeneity deteriorates
Solution Approach 1:
A deflection unit is introduced as an intermediary component between the point light source and the target area. This deflection unit shapes the light beam to achieve homogeneous brightness distribution while keeping the light source itself simple and point-like, thus resolving the contradiction between device simplicity and illumination quality.
2Ease of manufacture
If different target areas are illuminated with identical illumination devices, then the manufacturing cost is reduced, but the adaptability to different areas deteriorates
Solution Approach 1:
The deflection unit is designed to be variable and adaptable, allowing identical illumination devices to be configured for different target areas. This dynamic capability enables a single standardized device design to serve multiple applications by adjusting the deflection unit's parameters or configuration, thus maintaining manufacturing simplicity while achieving area-specific adaptation.
3Illumination intensity
If beam-shaping elements are customized for each application, then the brightness distribution homogeneity is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The deflection unit is designed as a universal component that can perform multiple beam-shaping functions for different target areas. Instead of creating custom beam-shaping elements for each application, a single versatile deflection unit design can be configured to achieve homogeneous illumination across various scenarios, reducing both device complexity and manufacturing costs while maintaining illumination quality.
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
This solution enables flexible and dynamic adaptation of light patterns to achieve uniform brightness distribution on various target areas, reducing the need for multiple beam-shaping elements and allowing for efficient use of point light sources to replace linear luminaires, thereby minimizing installation space and material costs while maintaining visual appearance.
Implementation Method 1
The deflection unit is designed to convert the first beam from the cone of light into a second cone of light in a beam-shaping manner
Implementation Method 2
The deflection unit is designed to emit the second cone of light or at least part of the same towards the target area
Data Source
AI summary
An illumination device (6) comprising a light source (8) producing a first cone of light (10) and a deflection unit (12) for the beam-shaping conversion of the first cone of light (10) into a second cone of light (14a,b) and to emit the latter towards the target area (4a,b), the deflection unit (12) can be varied in order to vary the form (Fa,b) and/or the intensity distribution (Ia,b) in the second cone of light.An illumination system (2) contains the illumination device (6) and the target area (4a,b).The illumination device (6) or the illumination system (2) is used to illuminate a surface of an interior of a vehicle as target area (4a,b).