Vehicle Headlight LED Module Light Guide Homogeneity
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Solution Overview
Problem
Vehicle headlights with additional light functions, such as daytime running lights, often compromise their characteristic appearance when switching between main and additional light functions, requiring different LED modules to be activated or deactivated, which affects the visual recognition of car brands.
Innovation Solution
A vehicle headlight design where all LED light sources can be used on a common print, with a light guide having openings for primary LED light sources to maintain the main light distribution and secondary LED light sources contributing to the additional distribution, ensuring the same visual appearance for both functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different LED modules are switched on or off for additional light functions, then the additional light function can be generated, but the characteristic appearance of the headlight changes
Solution Approach 1:
The LED light source is divided into multiple independently controllable LED segments arranged in a specific pattern. Each LED can be individually switched on or off to generate different light functions (main light, additional light, daytime running light) while maintaining the overall characteristic appearance of the headlight.
Solution Approach 2:
A single LED light module with multiple LEDs performs multiple functions. By controlling different combinations of LEDs within the same module, the system can generate both main light distribution and additional light distribution, as well as daytime running light functions, without changing the physical configuration or appearance of the headlight.
2Shape
If all LED light sources are used on a common print, then the visual appearance is maintained, but the light distribution optimization becomes complex
Solution Approach 1:
Different regions of the common LED print are assigned different functions. Specific LEDs are positioned and controlled to create main light distribution in certain areas while other LEDs contribute to additional light distribution in different areas. This local differentiation allows optimal light distribution control while maintaining a unified visual appearance.
Solution Approach 2:
The system dynamically controls the intensity and activation state of individual LEDs or LED groups within the common print. By adjusting the operational state of each LED based on the required light function, the system optimizes light distribution for different modes (main light, additional light, daytime running light) while keeping all LEDs physically present to maintain visual identity.
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 design allows all light modules to be active for both main and additional light functions, maintaining the headlight's visual identity while optimizing light distribution and meeting legal requirements for illumination patterns.
Implementation Method 1
A vehicle headlight design where all LED light sources can be used on a common print, with a light guide having openings for primary LED light sources to maintain the main light distribution and secondary LED light sources contributing to the additional distribution
Implementation Method 2
one or more primary LED light sources, a primary LED light source comprising at least one light-emitting diode comprises two or more secondary LED light sources, wherein a secondary LED light source comprises at least one light-emitting diode, and comprises a lens, wherein the light emitted by the at least one primary LED light source is emitted directly onto the lens and from this is projected into the outside space
Data Source
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AI summary
The invention relates to a vehicle headlight (1) for generating a main light distribution and an auxiliary light distribution, wherein the vehicle headlight (1) comprises two or more LED light modules (10), each of the LED light modules (10) comprising one or more primary LED light sources (11), wherein a primary LED light source (11') comprises at least one light-emitting diode, comprising two or more secondary LED light sources (12, 12a), wherein a secondary LED light source (12, 12a) comprises at least one light-emitting diode (12'), and comprising a lens (13), wherein the light emitted by the at least one primary LED light source (11) is emitted directly onto the lens (13) and projected from there into the outside space, wherein the light emitted by the primary LED light sources (11) of all LED modules (10) forms the main light distribution, and wherein the light emitted by the secondary LED light sources (12,12a) Light emitted from an LED module (10) is emitted via a light guide (14) onto the lens (13) of the LED module (10), which lens (13) projects the light into the outside space, and wherein the light emitted from the secondary LED light sources (12, 12a) of all LED modules (10) forms the additional light distribution, wherein preferably at least one of the secondary LED light sources (12a) directly illuminates the light guide (14) to achieve a homogeneous light distribution contribution to the additional light distribution, and wherein light from at least one of the secondary LED light sources (12) is coupled into the light guide (14) via at least one light coupling point (140) and exits from at least one light coupling point (141) in a substantially parallel direction to generate a maximum contribution to the additional light distribution.