Vehicle Lamp Unit Optics for Adjustable Brightness Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lamp units struggle to adjust light flux distribution on the light shielding member and form an irradiation pattern with a desired brightness distribution.
Innovation Solution
A lamp unit comprising a light source unit with multiple light sources, a condenser lens with a curved and annular incident surface, and a projector lens, where the light sources are positioned above the lamp unit axis, and the condenser lens is oriented to direct light downward, allowing for efficient light utilization and adjustable light flux distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light from a light source is guided to a light shielding member by a light guiding body to efficiently use the light, then light utilization efficiency is improved, but the light flux distribution on the light shielding member becomes uniform and difficult to adjust, making it impossible to form an irradiation pattern with a desired brightness distribution
Solution Approach 1:
The light guiding body is divided into multiple light guiding portions arranged in different directions. Each light guiding portion guides light from different light sources along different paths to different regions of the light shielding member, enabling independent control of light flux distribution while maintaining high light utilization efficiency.
Solution Approach 2:
Different light guiding portions are configured with different optical characteristics to achieve different light flux distributions in different regions. The first light guiding portion guides light to form a first light flux distribution, while the second light guiding portion guides light to form a second light flux distribution, allowing localized adjustment of brightness distribution on the light shielding member.
2Device complexity
If a conventional light guiding body is used to guide light uniformly, then the structure is simple, but the light flux distribution cannot be adjusted to form desired brightness patterns
Solution Approach 1:
The light guiding body is segmented into multiple independent light guiding portions, each with specific optical functions. This segmentation enables precise control of light flux distribution while maintaining relative structural simplicity through modular design.
Solution Approach 2:
The patent introduces spatial dimensionality by arranging light guiding portions in different directions and positions. The first light guiding portion extends in a first direction while the second light guiding portion extends in a second direction, creating multi-dimensional light flux control capability.
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 lamp unit effectively forms an irradiation pattern with a desired brightness distribution while efficiently using light from the source, allowing for flexible mounting and improved usability in vehicle lamp fittings.
Implementation Method 1
a condenser lens that condenses the light from the light sources; an incident surface of the condenser lens has a curved incident surface section facing the light sources
Implementation Method 2
the condenser lens has a reflective surface surrounding the curved incident surface section
Data Source
AI summary
A lamp unit forms an irradiation pattern having a desired brightness distribution while efficiently using light from a light source. In the lamp unit, a light source unit including light sources, a condenser lens, a light shielding member (shade), and a projector lens are arrayed along a lamp unit axis. An incident surface has a curved incident surface section facing the light sources and an annular incident surface section surrounding the curved incident surface section. The condenser lens has a reflective surface surrounding the curved incident surface section. The light shielding member (shade) is disposed such that a light shielding reference point coincides with a lamp unit axis. The light sources are disposed with an emission light axis positioned above the lamp unit axis in the vertical direction. The condenser lens is disposed such that condenser lens axes are positioned above the lamp unit axis in the vertical direction.