Vehicle Lighting Hologram Layout for Simpler PCB Installation
Solution Overview
Problem
Existing vehicle lighting devices with hologram units face installation challenges due to the curvature of hologram segments, requiring light sources to be directed differently, which complicates the installation process.
Innovation Solution
A lighting device design featuring a flat printed circuit board with light sources on both sides, aligned with the main beam direction, allowing for a simpler installation by concealing the light source unit behind a small screen, and using V-shaped printed circuit boards to further simplify the setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If curvature is applied to hologram segments to achieve predefined light distribution, then light distribution quality is improved, but installation complexity increases due to requiring light sources at different directions
Solution Approach 1:
The hologram unit is divided into multiple individual hologram segments that can be independently positioned and oriented. Each segment can be separately installed to achieve the desired curved light distribution pattern without requiring the entire assembly to be complex, as each segment handles a specific portion of the light distribution task.
Solution Approach 2:
The patent transitions from a two-dimensional flat hologram structure to a three-dimensional curved arrangement of hologram segments. This dimensional change allows the light sources to remain in a single plane while the hologram segments create curved light distributions through their spatial arrangement and orientation in three-dimensional space.
2Adaptability or versatility
If multiple light sources are used to generate different light distributions, then light distribution versatility is improved, but device complexity and cost increase
Solution Approach 1:
Each hologram segment is designed to be multi-functional, capable of generating different light distributions by varying the orientation and positioning of the same physical segment. This eliminates the need for separate dedicated light sources for each light distribution pattern, as the universal hologram segments can be reconfigured to achieve multiple functions.
Solution Approach 2:
The hologram segments are positioned and oriented dynamically rather than being fixed in static positions. This dynamic arrangement allows the same set of hologram segments to generate different light distributions by changing their spatial configuration, reducing the need for multiple static light sources.
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 easier generation of various light distributions and simplifies the installation of light sources, reducing the complexity and cost associated with the number of LEDs and electricity needed for signal functions.
Implementation Method 1
a hologram unit (2) containing a number of hologram segments (5), in this case reflection hologram segments (5), for generating a predefined light distribution, in which the hologram segments are reflection hologram segments behind and/or adjacent to the light source unit (1) in the main beam direction (H) of the lighting device, such that the light (6) emitted from the light sources (3) strikes the reflection hologram segments (5) at an acute angle (φ)
Implementation Method 2
The reflection hologram segments (5) are behind the light sources (3) in the main beam direction (H). The light sources (3) are concealed behind a horizontal screen with holes through which the light from the light sources (3) strikes the respective hologram segments at an acute angle.
Data Source
AI summary
A lighting device for vehicles includes a light source unit containing numerous light sources, and includes a hologram unit containing numerous hologram segments for generating a predefined light distribution. The hologram segments form reflection hologram segments behind and/or next to the light source unit in the main beam direction (H) of the lighting device, such that light emitted from the light source strikes the reflection hologram segment at an acute angle φ). Holographic diffraction information is stored in the reflection hologram segments for generating a signal light distribution. The light source unit contains just one printed circuit board or one printed circuit board substrate.