Vehicle Lamp Optical Layout for Precise Beam Distribution
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Solution Overview
Problem
Conventional vehicle lamps struggle with adjusting light distribution on the shade to form a desired brightness distribution and accurately attaching optical components.
Innovation Solution
A vehicle lamp design featuring multiple light sources, a collecting lens with distinct lens portions, a shielding member with slit portions, and a projecting lens to form a radiation pattern, with components fixed to a supporting member to ensure precise alignment and efficient light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a light guide is used to guide light from the light source to the shade, then light efficiency is improved, but the ability to adjust light distribution and form desired brightness patterns deteriorates
Solution Approach 1:
The collecting lens is divided into multiple lens portions (first lens portion and second lens portion), each corresponding to different light sources and controlling light to different regions of the shade. This segmentation allows independent control of light distribution while maintaining efficient light guidance, resolving the contradiction between light efficiency and distribution adjustability.
2Stability of the object's composition
If multiple optical members (collecting lens, shielding member, projecting lens) are supported by a frame or case, then structural stability is improved, but attachment accuracy and alignment precision deteriorate
Solution Approach 1:
The collecting lens and the projecting lens are integrated into a single lens unit, eliminating the need for separate supporting frames for each optical member. This merging reduces the number of attachment interfaces and improves alignment precision while maintaining structural stability through the unified design.
Solution Approach 2:
A light baffle is introduced as an intermediary component between the light sources and the lens unit. The light baffle provides a stable reference structure for mounting the lens unit while precisely controlling light paths, thereby improving both structural stability and attachment accuracy simultaneously.
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 allows for the formation of a radiation pattern with desired brightness distribution while efficiently using light from the sources and ensuring accurate attachment of optical components.
Implementation Method 1
a collecting lens that collects light from the first light source and the second light source
Implementation Method 2
a shielding member that is provided with a radiating slit that partially passes the light collected by the collecting lens
Implementation Method 3
a projecting lens that projects the light having passed through the shielding member to form a radiation pattern
Data Source
AI summary
A vehicle lamp includes first and second light sources, a collecting lens that collects light, a shielding member that passes collected light through a radiating slit, and a projecting lens that forms a radiation pattern with light. The collecting lens includes a first lens portion and a second lens portion that correspond to the first and second light sources, respectively, the radiating slit includes a near-side slit portion and a far-side slit portion that correspond to a near-side radiation design and a far-side radiation design, respectively, in the radiation pattern, the first lens portion and the second lens portion are opposed to the far-side slit portion and the near-side slit portion, respectively. A collecting lens member, the shielding member, and a projecting lens member are fixed to a supporting member such that a collecting lens frame and a shielding frame overlap with each other in an optical axis direction.