Vehicle Lamp Separator Layout for Uniform Low and Intense High Beams
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Solution Overview
Problem
Reducing the number of low beam light sources in vehicle lamps leads to uneven light distribution and insufficient luminous intensity for high beam patterns, preventing the realization of ADB functions.
Innovation Solution
A vehicle lamp design with an upper separator having a longer optical length than a lower separator, along with specific light incident and reflection surfaces, ensures even low beam distribution and prevents high beam patterns from spreading horizontally, maintaining required luminous intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the optical length of the separator is extended to broaden the partial light distribution pattern for low beam, then the overlapping areas of partial light distribution patterns increase and light distribution unevenness is suppressed, but the partial light distribution pattern for high beam also expands in the horizontal direction and luminous intensity becomes insufficient
Solution Approach 1:
The separator is divided into an upper separator and a lower separator with different optical lengths. The upper separator has a longer optical length to broaden the low beam light distribution pattern and increase overlapping areas, while the lower separator has a shorter optical length to maintain the concentration and luminous intensity of the high beam light distribution pattern. This segmentation allows each separator to be optimized for its specific function without compromising the other beam type's performance.
2Ease of manufacture
If the number of low beam light sources is reduced for cost saving, then manufacturing cost decreases, but the overlapping area of partial light distribution patterns decreases and light distribution unevenness occurs
Solution Approach 1:
The optical length parameter of the upper separator is increased to extend the horizontal width of the partial light distribution patterns for low beam. This parameter change causes the patterns to overlap more extensively, achieving uniform light distribution even when fewer low beam light sources are used. Thus, cost reduction is achieved without sacrificing light distribution uniformity.
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 design suppresses light distribution unevenness in low beams and ensures sufficient luminous intensity for high beams, enabling the realization of ADB functions even with reduced low beam light sources.
Implementation Method 1
a projection lens; a low beam light source that emits light incident on the projection lens from the rear side of the vehicle, the light having been reflected by the upper separator, and a high beam light source that emits light incident on the projection lens from the rear side of the vehicle, the light having been reflected by the lower separator
Implementation Method 2
the upper separator includes a low beam light incident portion disposed on the rear side of a vehicle and a low beam light exiting surface disposed on the front side of the vehicle, the lower separator includes a high beam light incident portion disposed on the rear side of the vehicle and a high beam light exiting surface disposed on the front side of the vehicle
Data Source
AI summary
The vehicle lamp can include: a projection lens; an upper separator disposed behind the projection lens and above the optical axis of the projection lens; a lower separator disposed behind the projection lens and below the optical axis of the projection lens; a low beam light source; and a high beam light source; the upper separator includes a low beam light incident portion and a low beam exit surface; the lower separator includes a high beam light incident portion and a high beam exit surface; the focal point of the projection lens is positioned between the low beam exit surface and the high beam exit surface; the optical length of the upper separator is longer than that of the lower separator.