Vehicle Lighting Device Holographic Diffraction Homogeneous Illumination
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Solution Overview
Problem
Existing vehicle lighting devices require a high number of optical elements and light sources to achieve homogeneous illumination, leading to complexity and increased optical effort, making it difficult to produce a luminous surface in a lens covering a lamp housing.
Innovation Solution
A hologram element with a diffraction structure is used to deflect the light beam onto the lens, providing a homogeneously illuminated surface and reducing the need for multiple light sources and optical elements, allowing for a compact optics unit and variable illumination patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources and optical elements are used to achieve homogeneous illumination, then the illumination quality is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple optical functions (beam shaping, light distribution, and illumination homogenization) into a single hologram element. This single element integrates the functionality that would traditionally require multiple separate optical components and light sources, thereby reducing device complexity while maintaining homogeneous illumination quality.
Solution Approach 2:
The hologram element acts as an intermediary between the light source and the lens. It receives light from the source, applies the diffraction structure to shape and distribute the beam, and projects the homogeneous illumination pattern onto the lens surface. This intermediary approach eliminates the need for multiple direct optical paths and components.
2Illumination intensity
If a large number of LED light sources are used to achieve desired homogeneous illumination, then the illumination quality is improved, but the optical effort and energy consumption increase
Solution Approach 1:
The patent merges the functions of multiple LED light sources into a single light source配合with a hologram element. The hologram element's diffraction structure distributes the light from this single source across the lens surface in a homogeneous pattern, eliminating the need for multiple energy-consuming light sources while achieving the same illumination quality.
Solution Approach 2:
The patent replaces the mechanical/system approach of using multiple physical light sources with an optical field approach using a hologram element. The diffraction structure manipulates the light field to achieve homogeneous distribution, substituting the need for multiple independent light-generating components with a single light source and optical field manipulation.
3Reliability
If multiple optical elements are used to generate light functions, then the light function quality is improved, but the optics unit size and complexity increase
Solution Approach 1:
The patent merges multiple optical elements (reflector, lens, hologram element) into a streamlined configuration where the hologram element performs multiple functions simultaneously. This integration reduces the overall volume of the optics unit while maintaining the quality of light function generation through the combined effect of the simplified optical path.
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 achieves a reduced optical complexity, enabling efficient generation of homogeneous illumination patterns with fewer light sources and optical means, while maintaining a three-dimensional appearance and depth effect in the lighting device.
Implementation Method 1
The hologram element has such a diffraction structure that the light beam emitted by the light source is deflected onto the illuminated surface of the lens in accordance with the predefined illumination pattern
Data Source
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AI summary
The invention relates to a lighting device for vehicles, in particular a signal light, comprising a light source for emitting a light beam and an optical unit associated with the light source for producing a predetermined light function, the optical unit having a holographic element and a lens arranged in the main emission direction in front of the holographic element, the holographic element comprising such a diffraction structure that the light beam emitted from the light source onto the holographic element is varied according to a predetermined illumination pattern such that the holographic light beam lights an illumination surface of the lens to generate the light function.