Lighting Device Integrating Collimating and Scattering Optical Elements
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Solution Overview
Problem
Existing lighting devices fail to effectively perform multiple light functions on a common surface, particularly requiring large light scattering and high homogeneity for one function and low light scattering with low homogeneity for another, while also needing the light sources to be located on the same carrier in one plane.
Innovation Solution
A lighting device with a primary light source associated with collimating elements and a secondary light source associated with light guiding elements, both integrated within a common light guide body, where the output of the light guiding elements is positioned behind the collimating elements, and a light scattering filter is placed at the output, allowing for two different light functions with varying light distribution and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light scattering filter is placed at a certain distance from the LED light source to scatter light beams, then light homogeneity is improved, but the light scattering angle is limited and cannot achieve both high homogeneity and large scattering angle simultaneously
Solution Approach 1:
The patent divides the lighting device into separate functional modules: a first light guide body for direct light transmission with high homogeneity, and a second light guide body for scattered light transmission with large scattering angle. This segmentation allows each module to optimize for its specific function without compromise
Solution Approach 2:
The patent introduces a light scattering element as an intermediary component within the second light guide body. This intermediary element selectively scatters light while allowing direct light to pass through, enabling the system to achieve both direct and scattered light functions simultaneously
2Loss of energy
If collimating elements are used to direct light beams, then luminous efficiency is improved, but light homogeneity deteriorates
Solution Approach 1:
The patent creates separate light guide bodies for different light functions. The first light guide body maintains direct light paths for high homogeneity requirements, while the second light guide body implements light scattering for functions requiring large scattering angles, thus resolving the contradiction between efficiency and homogeneity
3Device complexity
If multiple light functions are performed on a common surface, then device integration is improved, but the ability to achieve required lighting performance for each function deteriorates
Solution Approach 1:
The patent divides the common surface into multiple light guide bodies, each dedicated to specific light functions. This segmentation maintains device integration while ensuring each function receives optimized light delivery, thereby preserving lighting performance reliability
Solution Approach 2:
Different regions of the common surface (different light guide bodies) are assigned different optical properties: some regions maintain direct light transmission for high homogeneity, while other regions incorporate scattering elements for large scattering angles, allowing each local region to optimize for its specific function
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 configuration enables the achievement of two distinct light functions, such as contour/position light and direction indicator, or position light and brake light, with improved light homogeneity and reduced spatial requirements by integrating both functions into a single device.
Implementation Method 1
The optical element reflects and substantially collimates light beams emitted from the light source
Implementation Method 2
a secondary light source (2b) with light guiding elements (3) associated therewith, wherein the light guiding elements are arranged in the common light guiding body
Implementation Method 3
A light scattering filter is placed in the direction of propagation of light beams to scatter the light beams
Data Source
AI summary
The invention relates to a lighting device with a multiple light function, which comprises a primary light source and secondary light source (2a, 2b) associated with optical elements which are adapted to guide light to the output of the device. The primary light source (2a) is associated with collimating elements (4) and the secondary light source (2b) is associated with light guiding elements (3), whereby the collimating elements (4) and the light guiding elements (3) are arranged in a common light guiding body (A), the output of the light beams is situated behind the level (6) of the exit ends of the collimating elements (4) and on the output side of light guiding body (A) a light scattering filter (7) is arranged.