Vehicle Lamp Light Source Positioning for Beam Pattern Brightness
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Solution Overview
Problem
Vehicle lamps with multiple light irradiation regions often experience reduced brightness when viewed from different angles, leading to incomplete or less-than-ideal beam patterns due to varying light distribution.
Innovation Solution
A vehicle lamp design featuring first and second lamp units with adjustable light irradiation regions, where the position of light sources relative to the rear focal point of a light path adjusting unit ensures consistent brightness across viewing directions, using a combination of lamp modules with different light source positions and focal lengths to form high illuminance and spread regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple lamps are provided to form multiple light irradiation regions, then the beam pattern can be formed with high illuminance region and spread region, but the brightness of the image formed by a specific lamp becomes relatively darker when viewed around the vehicle depending on the position where the light irradiation region is formed
Solution Approach 1:
The patent applies local quality by positioning light sources at different locations relative to the rear focal point of the light path adjusting unit. Specifically, some light sources are positioned on the rear focal point while others are positioned on both sides, creating different light distribution characteristics in different regions. This allows each lamp module to contribute differently to the overall beam pattern, ensuring consistent brightness across all viewing directions while maintaining a compact single-lamp structure.
2Reliability
If light sources are positioned to form specific light irradiation regions, then the beam pattern can be optimized, but the visibility decreases when viewed from different angles around the vehicle
Solution Approach 1:
The patent segments the light source arrangement into multiple groups positioned at different locations relative to the rear focal point. This segmentation allows different portions of the light sources to contribute to different viewing directions, ensuring that the beam pattern maintains optimal characteristics across all angles. The segmented arrangement prevents any single region from dominating the light distribution, thereby maintaining consistent visibility from all directions.
Solution Approach 2:
The patent employs asymmetric positioning of light sources relative to the rear focal point, with light sources distributed on both sides rather than symmetrically arranged. This asymmetric configuration optimizes the light distribution for multiple viewing directions simultaneously, ensuring that the beam pattern remains effective whether viewed from the left, right, front, or rear angles around the vehicle.
3Device complexity
If a single lamp is used instead of multiple lamps, then the device complexity is reduced, but the ability to form distinct high illuminance region and spread region is compromised
Solution Approach 1:
The patent merges multiple light sources and their associated light path adjusting units into a single integrated lamp structure. By combining multiple light sources at different positions relative to the rear focal point within one lamp housing, the patent achieves the beam pattern formation capabilities of multiple separate lamps while reducing overall device complexity. The merged structure allows different light sources to collectively form both the high illuminance region and spread region within a unified lamp assembly.
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
Maintains consistent light distribution and visibility regardless of viewing direction without the need for additional lamp modules, enhancing the overall performance of the beam pattern.
Implementation Method 1
a light path adjusting unit for adjusting a path of the light generated from the light source unit
Implementation Method 2
a position of light irradiation region formed by the light emitted from each of the plurality of lamp modules may be configured depending on a position of the light source with respect to a rear focal point of the light path adjusting unit
Data Source
AI summary
A vehicle lamp includes a first lamp unit for forming a first region of a beam pattern, and a second lamp unit for forming a second region of the beam pattern. The first lamp unit and the second lamp unit are arranged in a left-right direction. Each of the first lamp unit and the second lamp unit includes a plurality of lamp modules arranged in the left-right direction, each of the plurality of lamp modules including a light source unit including a light source and a light path adjusting unit. A position of light irradiation region formed by the light emitted from each of the plurality of lamp modules is particularly configured depending on a position of the light source with respect to a rear focal point of the light path adjusting unit.