Common Lens Vehicle Lighting Device for Stop and Cargo Lamps
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Solution Overview
Problem
Existing motor vehicle lighting devices for rear exterior zones combine stop lamps and cargo lamps, but they require separate optical elements and drive systems, leading to increased complexity and manufacturing costs, while failing to meet the distinct visibility requirements for both functions effectively.
Innovation Solution
A lighting device with a common lens and electronic holder that uses light-emitting diodes (LEDs) with collimators and a geometrically configured internal surface to form both stop-lamp and cargo-lamp light beams, reducing the number of components and assembly operations while meeting the specific orientation and intensity requirements of each function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate optical elements are used for stop lamps and cargo lamps, then each lamp can meet its specific orientation requirements, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies a single multi-functional optical element that can form both stop-lamp light beams and cargo-lamp light beams. This optical element contains different optical regions with distinct functionalities: a first optical region for forming stop-lamp beams with specific orientation, and a second optical region for forming cargo-lamp beams with different orientation characteristics. By integrating multiple functions into one element, the patent reduces device complexity while maintaining the ability to meet specific orientation requirements for each lamp type.
Solution Approach 2:
The single optical element is segmented into different optical regions, each responsible for forming light beams for specific lamp types. The first optical region is configured to form stop-lamp light beams, while the second optical region is configured to form cargo-lamp light beams. This segmentation allows each region to be optimized for its specific function while being part of a unified optical element, thereby reducing overall device complexity without sacrificing orientation precision.
2Ease of operation
If separate drive systems are used for stop lamps and cargo lamps, then independent control is achieved, but the device complexity increases
Solution Approach 1:
The patent combines multiple control functions into a single integrated control system. The control system is configured to selectively activate different groups of light-emitting diodes based on operational requirements: it can activate a first group for stop-lamp function, a second group for cargo-lamp function, or both groups simultaneously. This merging of control functions into one system maintains independent control capability while reducing device complexity by eliminating the need for separate drive systems.
3Device complexity
If a common lens is used for both stop lamps and cargo lamps, then manufacturing cost and complexity are reduced, but meeting distinct visibility requirements becomes more difficult
Solution Approach 1:
The common optical element incorporates local quality variations through its segmented structure. The first optical region is specifically designed with optical properties optimized for forming stop-lamp light beams, while the second optical region is designed with different optical properties optimized for forming cargo-lamp light beams. This local differentiation within a single element allows the common lens to meet distinct visibility requirements for different lamp types while maintaining overall device simplicity.
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 solution allows for a simpler, cost-effective lighting device that provides optimal visibility for both stop lamps and cargo lamps, enhancing user safety and reducing manufacturing complexity by using a single common lens and electronic holder to produce multiple light beams with different characteristics.
Implementation Method 1
uses light-emitting diodes (LEDs) with collimators and a geometrically configured internal surface to form both stop-lamp and cargo-lamp light beams
Implementation Method 2
uses light-emitting diodes (LEDs) with collimators and a geometrically configured internal surface to form both stop-lamp and cargo-lamp light beams
Data Source
AI summary
A lighting device for a motor vehicle, the lighting device including a vehicle stop-lamp assembly and a cargo-lamp assembly. The lighting device includes a common lens that is configured, on the one hand, to form at least one stop-lamp light beam and, on the other hand, to form at least one cargo-lamp light beam. It furthermore includes a first group of light sources that are configured to emit stop-lamp light beams and a second group of light sources that are configured to emit cargo-lamp light beams, the light sources of the first group and of the second group being arranged on a common electronic holder.