Vehicle Lighting Hologram Element Diffraction Order Segmentation
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Solution Overview
Problem
Existing vehicle lighting apparatuses with hologram elements require complex calculations and manufacturing processes to utilize almost 100% of the first diffraction order light, imposing high demands on the light source unit and tolerances, and are not suitable for producing multiple light functions efficiently.
Innovation Solution
Incorporating an optical element downstream of the hologram or diffractive element to utilize light of different diffraction orders for various light functions, with a designed covering panel to scatter and direct light for distinct illumination ranges, allowing for the production of multiple light functions such as bright and dim light functions or side illumination ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a hologram element is designed to utilize almost 100% of the first diffraction order light, then light efficiency is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent segments the diffraction orders and assigns them to different light functions. The first diffraction order is used for the main illumination range while higher diffraction orders are used for side illumination ranges. This segmentation allows for simpler design of each individual function while utilizing multiple diffraction orders collectively, avoiding the need for complex calculations to optimize single-function light efficiency.
Solution Approach 2:
The hologram element is designed to serve multiple light functions simultaneously by utilizing different diffraction orders. The same hologram element produces both the main illumination range (first order) and side illumination ranges (higher orders), making it a multi-functional component that reduces overall device complexity compared to having separate optical elements for each function.
2Use of energy by moving object
If a hologram element is designed to utilize almost 100% of the first diffraction order light, then light efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
By segmenting the utilization of diffraction orders across multiple light functions, the patent reduces the precision requirements for each individual function. The hologram element is designed with diffraction information that naturally directs different orders to different functions, allowing for more relaxed manufacturing tolerances compared to optimizing a single function to 100% efficiency.
Solution Approach 2:
The patent changes the parameter of light function distribution by utilizing multiple diffraction orders. Instead of concentrating all optimization on the first diffraction order, the system distributes light functions across multiple orders (first order for main illumination, higher orders for side illumination), which changes the overall system parameters and reduces individual component precision requirements.
3Use of energy by moving object
If a hologram element is designed to utilize almost 100% of the first diffraction order light, then light efficiency is improved, but demands on light source bandwidth increase
Solution Approach 1:
The patent segments the light utilization across different diffraction orders and assigns them to different illumination ranges. This segmentation allows the system to be less demanding on light source bandwidth because each diffraction order can be optimized for its specific function rather than requiring the light source to cover a very broad spectrum for a single high-efficiency function.
Solution Approach 2:
The hologram element serves multiple light functions simultaneously using different diffraction orders, making the system more versatile. This multi-functionality reduces the bandwidth demands on the light source because the system can effectively utilize light across different orders for different purposes, rather than requiring a narrow bandwidth optimized for a single function.
4Use of energy by moving object
If a hologram element is designed to utilize almost 100% of the first diffraction order light, then light efficiency is improved, but the wall thickness of the hologram element increases
Solution Approach 1:
The patent segments the light function distribution across multiple diffraction orders. By doing so, it achieves high overall light efficiency without requiring a thick hologram element, because the system distributes light utilization rather than concentrating it in a single thick optical path optimization.
Solution Approach 2:
The patent changes the system parameters by utilizing multiple diffraction orders for different light functions. This parameter change allows for a thinner hologram element design compared to optimizing a single function to 100% efficiency, which would require greater thickness for the diffraction structures.
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
Enables the production of multiple light functions with reduced complexity and increased flexibility, using the first diffraction order for main illumination and higher orders for side illumination, improving light function diversity and spatial delineation while maintaining a compact design.
Implementation Method 1
the optical unit has a hologram element and/or a diffractive element in which diffraction information for producing the light function is contained... light striking the hologram element is diffracted in light of different orders of diffraction
Implementation Method 2
an optical element is disposed downstream of the hologram element and/or the diffractive element in the light beam path, so that light of different orders of diffraction emerging from the hologram element and/or the diffractive element produces different light functions or illumination ranges
Data Source
AI summary
A lighting apparatus for vehicles with a housing sealed by a transparent covering panel, containing a light source unit and an optical unit for producing a predetermined light function, wherein the optical unit has a hologram element and/or diffractive element in which diffraction information for producing the light function is contained, wherein optics are disposed downstream of the hologram element and/or the diffractive element in the light beam path, so that light of different orders of diffraction emerging from the hologram element and/or the diffractive element produce different light functions.