Motor Vehicle Headlight Light Guide Facet Distribution
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Solution Overview
Problem
Existing optical devices for motor vehicle headlights fail to produce a continuously closed light distribution that meets legal standards while maintaining the desired sparkle effect of crystal optics.
Innovation Solution
A light-guiding body with a light-shaping structure formed from multiple connected facets, each with horizontal and vertical inclinations distributed around an expected value, ensuring that light emitted by these facets forms a luminous intensity maximum and maintains a uniformly gradual radial light intensity decrease, preserving the sparkle effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide body with crystal optic structure is used, then a sparkling effect is achieved, but a continuously closed light distribution with maximum luminous intensity cannot be produced
Solution Approach 1:
The light guide body is segmented into multiple facets with different inclinations. Each facet directs light at specific angles, and collectively they form a continuously closed light distribution while maintaining the sparkling effect through the faceted crystal optic structure.
Solution Approach 2:
Different regions of the light guide body have facets with different inclinations optimized for their specific functions. Facets are distributed with different horizontal and vertical inclination angles to create both the maximum luminous intensity in specific directions and the continuous closed light distribution pattern required by legal standards.
2Illumination intensity
If facets are arranged to create maximum luminous intensity, then the sparkling effect is enhanced, but the light distribution may not form a continuously closed pattern
Solution Approach 1:
The facets are arranged with asymmetric inclination angles - both horizontal and vertical - rather than uniform symmetric patterns. This asymmetric distribution allows certain facets to concentrate light for maximum intensity while other facets distribute light to form the continuous closed pattern, resolving the contradiction between sparkling effect and continuous distribution.
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 enables the creation of a light distribution with maximum luminous intensity and a sparkling effect, optimizing the use of luminous flux while adhering to legal standards, such as ECE regulations.
Implementation Method 1
collimators which are connected downstream of the light sources in the direction of the light emission direction, wherein a collimator is assigned to a respective light source and is configured to align the light of the light source assigned to the respective collimator parallel to a main emission direction
Implementation Method 2
a light guide body which is connected downstream of the collimators in the direction of the main emission direction, wherein the light guide body has a light entry side into which emitted light from the collimators can be coupled, and a light exit side opposite the light entry side from which the light coupled in via the light entry side exits
Data Source
Figure 1~2A
Figure 2B~3
Figure 4~6
AI summary
Optical device (10) for a motor vehicle headlight for generating a continuous closed light distribution (15) which light distribution has a luminous intensity maximum (16), wherein the projection device (10) comprises: - light sources (100), - collimators (200) each assigned to a light source (100), - a light guide body (300) having a light entry side (310) and a light entry side (310), wherein the light guide body (300) has a light shaping structure (400) formed from a plurality of connected facets (410), wherein the facets (410) each have an inclination towards the main emission direction (X2), wherein the area vector (A) of a facet includes a horizontal inclination angle (βH) to the main emission direction (X2) and includes a vertical inclination angle (βV) to the main emission direction (X2), wherein the inclinations of all facets (410) are distributed in this way,that the inclination angles are each distributed around an expected value, wherein the expected value corresponds to the luminous intensity maximum of the light distribution such that light which couples into or out of the light guide body (300) via facets having a horizontal and vertical inclination angle corresponding to the expected value forms the luminous intensity maximum of the light distribution, and wherein the light shaping structure (400) forms the light entry side (310) and/or the light exit side (320) of the light guide body (300), wherein the facets (410) are arranged such that the facets (410) are distributed substantially homogeneously on the light entry side (310) and/or light exit side (320) with respect to their respective inclinations.