Vehicle Lighting Device with Prismatic Image Shifter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle lighting fixtures with multiple light sources experience light intensity unevenness due to gaps between light sources, leading to reduced visibility and safety issues, especially in variable light distribution applications.
Innovation Solution
A vehicle lighting fixture with a matrix arrangement of light sources and an optical lens featuring prisms on both front and rear surfaces, which widens the light source images in specific directions to suppress darkened areas and achieve more accurate light distribution control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple light sources are arranged with gaps between them, then the device complexity is reduced and ease of manufacture is improved, but light intensity unevenness occurs and visibility is reduced
Solution Approach 1:
A light-transmitting auxiliary material is introduced as an intermediary substance filling the gaps between light sources. This material transmits light while scattering it to fill darkened areas, thereby maintaining manufacturing simplicity while eliminating light intensity unevenness caused by gaps between light sources.
Solution Approach 2:
The optical properties of the auxiliary material are optimized by adjusting its light scattering characteristics and light transmission properties. By changing these optical parameters, the material effectively fills darkened areas while maintaining overall light distribution uniformity, resolving the contradiction between ease of manufacture and light intensity uniformity.
2Illumination intensity
If a light-scattering auxiliary material is used to suppress light intensity unevenness, then light distribution uniformity is improved, but light control accuracy deteriorates
Solution Approach 1:
The auxiliary material's optical parameters are precisely optimized to achieve a balance between light scattering and light transmission. By adjusting the scattering coefficient and transmission rate, the material provides sufficient diffusion to uniformize light distribution while maintaining enough directional control for accurate light positioning in variable light distribution applications.
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 effectively suppresses light intensity unevenness and enhances light distribution accuracy, ensuring safer driving conditions by minimizing darkened areas and adjusting prism shapes for precise control.
Implementation Method 1
an optical lens featuring prisms on both front and rear surfaces, which widens the light source images in specific directions
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
A vehicle lighting fixture (1, 1A) can control the light distribution with higher accuracy while suppressing the light intensity unevenness of the light distribution even with a plurality of light sources (21) used. The vehicle lighting fixture (1, 1A) can include: a plurality of LED elements (21) arranged in a vertical direction and a lateral direction; a projector lens assembly (3, 4) including two projector lenses (3 and 4) disposed in front of the plurality of LED elements (21) and configured to project light emitted from the plurality of LED elements (21) forward; and an image shifter (5) disposed in an optical path from the plurality of LED elements (21) to a position forward of the projector lenses (3 and 4). The image shifter (5) can include a plurality of prisms (510, 511A, 512A, 520, 521A, 522A) configured to widen light source images of the plurality of LED elements (21) in the vertical and lateral directions.