Vehicle Illumination Shielding Frame Absorbs Lateral Light
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Solution Overview
Problem
Existing vehicle illumination apparatuses suffer from undesirable scattered light due to lateral emission of light from LED chips, which increases costs and installation space requirements with the use of additional optical components to address this issue.
Innovation Solution
A shielding frame made of light-absorbing material is placed around the light source to enclose an intermediate space between the light source and the optical unit, preventing scattered light from exiting the housing by absorbing light and reducing reflections on neighboring components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an additional lens is provided to deflect laterally emitted light, then scattered light is prevented from emerging, but device complexity and installation space increase
Solution Approach 1:
The harmful lateral light emission is extracted and isolated from the main optical path by creating a separate enclosed space. The shielding frame extracts the problematic lateral light and contains it within the intermediate space, preventing it from affecting the optical unit and emerging as scattered light.
Solution Approach 2:
The shielding frame acts as an intermediary element between the light source and the optical unit. It mediates the interaction by providing a physical barrier that redirects and contains lateral light emission, preventing direct interaction between lateral light and the optical components.
2Volume of moving object
If the light source frame terminates flush with the light-emitting surface, then the structure is compact, but laterally emitted light cannot be prevented from emerging
Solution Approach 1:
The solution moves from a two-dimensional flush surface to a three-dimensional enclosed space. By raising the shielding frame walls vertically from the support plate, the invention creates a volumetric barrier that contains lateral light emission without significantly increasing the horizontal footprint of the light source assembly.
Solution Approach 2:
The shielding frame with its raised walls creates a nested intermediate space that contains the light source and redirects lateral emission. This nested structure allows the light source to maintain its compact form while being embedded within the larger shielding framework that handles the lateral light management.
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 effectively prevents scattered light from exiting the illumination apparatus, reduces reflections, and maintains a compact design without additional installation space, ensuring a high-resolution light distribution and improved light output.
Implementation Method 1
The shielding frame is made of a light-absorbing material, so the light from the light source that strikes it is absorbed and cannot exit the housing of the illumination apparatus as scattered light
Implementation Method 2
no undesirable reflections of the light emitted by the light source can occur at neighboring electrical components, since the frame wall of the shielding frame is arranged between the light source and the neighboring components located on the support plate
Data Source
AI summary
An illumination apparatus for vehicles having a light source, a support plate for receiving the light source, and an optical unit arranged in front of the light source in the main emission direction to deflect light emitted by the light source onto a roadway in front of the vehicle in accordance with a predetermined light distribution. The light source has a light-emitting surface and a light source frame surrounding the same. The light source is surrounded by a shielding frame with a wall that is raised in the main emission direction and encloses an intermediate space between the light source and the optical unit.