Vehicle Lamp PCB Light Shielding for Stray Light Control
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Solution Overview
Problem
Existing vehicle lamp designs suffer from stray light rays that do not meet legal light distribution requirements due to inadequate control, causing glare and poor heat dissipation, with integrated light shielding in heat sinks being inefficient.
Innovation Solution
A lighting device with a light source mounted on a printed circuit board, using light shielding electronic elements mounted via through-hole or surface mounting processes to block stray light rays, allowing for improved heat dissipation and precision blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a light shielding part is formed integrally on a heat sink, then the light blocking function is provided, but the heat dissipation performance is poor and the blocking precision is insufficient
Solution Approach 1:
The patent divides the light shielding function from the heat sink structure by using separate electronic elements mounted on the PCB. This segmentation allows the heat sink to focus on heat dissipation while electronic elements provide precise light blocking, resolving the contradiction between heat dissipation performance and light blocking function.
Solution Approach 2:
The patent introduces electronic elements as intermediary components between the light source and the heat sink. These elements serve as mediators that provide precise light blocking without interfering with the heat sink's thermal management function, thus improving both blocking precision and heat dissipation.
2Object-generated harmful factors
If the light source is located close to the light shield, then the blocking effect is improved, but the heat dissipation performance deteriorates
Solution Approach 1:
Electronic elements serve as intermediary light shielding components that can be precisely positioned near the light source without requiring the light source itself to be close to the heat sink edge. This intermediary approach maintains effective blocking while preserving heat dissipation performance.
3Device complexity
If a light shielding part is formed integrally on a heat sink, then the structure is simplified, but the production cost increases and blocking precision is reduced
Solution Approach 1:
The patent segments the light shielding function into separate electronic elements that can be precisely manufactured and mounted using standard PCB techniques. This segmentation enables high blocking precision while maintaining manufacturing efficiency through conventional assembly processes.
Solution Approach 2:
The patent changes the form and positioning parameters of light shielding elements from integral heat sink structures to separately mounted electronic components. This parameter change enables precise control of blocking characteristics while utilizing standard electronic assembly processes.
4Object-generated harmful factors
If the light source is located close to the edge of the printed circuit board, then the light blocking is improved, but the heat dissipation performance deteriorates
Solution Approach 1:
Electronic elements act as intermediary light shielding components that can be positioned optimally for blocking without constraining the light source location. This allows the light source to be positioned for optimal heat dissipation while electronic elements provide the necessary light blocking function.
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
Enhances heat dissipation performance, improves light blocking precision, reduces heat sink weight, and lowers production costs by utilizing electronic elements on the printed circuit board for light shielding.
Implementation Method 1
at least one light shielding electronic element, for blocking at least a portion of light rays emitted by the light source towards the lens
Implementation Method 2
at least a portion of light rays emitted by the light source towards the optical face are guided by the optical face and then emerge through the lens
Data Source
Figure 1
Figure 2
AI summary
The present invention provides a lighting device (10), comprising a light source (210), a printed circuit board (200), an optical face (310) and a lens (400), wherein the light source (210) is mounted on the printed circuit board (200), and at least a portion of light rays emitted by the light source (210) towards the optical face (310) are guided by the optical face (310) and then emerge through the lens (400); at least one light shielding electronic element (220) is also mounted on the printed circuit board (200), for blocking at least a portion of light rays emitted by the light source (210) towards the lens (400), to prevent this portion of light rays from emerging through the lens (400) directly.