Motor-vehicle Light-emitting Module with Radial Sources and Cavities
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Solution Overview
Problem
Existing motor-vehicle light-emitting devices based on light guides face challenges such as high cost and complexity, non-uniform pixel brightness, low luminous efficacy leading to increased power consumption and heat generation, and difficulties in manufacturing components for varying device depths.
Innovation Solution
A motor-vehicle light-emitting module comprising radially emitting light sources and cavities with partitions that scatter light, allowing for uniform illumination and efficient light distribution, which reduces the number of light sources needed and decreases power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light guides are used to guide light from sources to exit surfaces, then light distribution is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the light guide component from the system entirely. Instead of using light guides to transport light from sources to exit surfaces, the invention places light sources directly at the exit locations, eliminating the need for complex light guiding structures and their associated manufacturing challenges.
Solution Approach 2:
The patent segments the light-emitting device into independent light source units, each positioned at a specific exit location. This segmentation allows each light source to be independently controlled and positioned, simplifying the overall structure by removing the need for integrated light guide pathways that would otherwise connect multiple sources to multiple exits.
2Manufacturing precision
If light guides are used to distribute light, then light distribution is achieved, but pixel brightness uniformity deteriorates
Solution Approach 1:
The patent removes the light guide component that causes non-uniform light distribution. By placing light sources directly at the exit locations without intermediate light guiding, each pixel receives light directly from its dedicated source, ensuring uniform brightness across all pixels without the losses and variations inherent in light guide transmission.
3Illumination intensity
If powerful light sources are used to compensate for light guide losses, then sufficient brightness is achieved, but power consumption and heat generation increase
Solution Approach 1:
The patent extracts and eliminates the light guide component that causes luminous efficacy losses. By placing light sources directly at the exit locations, the system achieves sufficient brightness without the need for powerful sources, as there are no coupling losses or guiding losses to compensate for, thereby reducing power consumption and heat generation.
4Adaptability or versatility
If conventional injection molding processes are used for manufacturing, then production is achieved, but devices with varying depths cannot be manufactured
Solution Approach 1:
The patent removes the light guide component that creates manufacturing constraints for depth variations. Without light guides requiring precise molding for consistent depth, the device can be manufactured with varying depths using conventional injection molding processes, as each light source is positioned independently at its exit location without requiring uniform cavity depths.
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 achieves good pixel uniformity, reduces power consumption and heat generation, and allows for cost-effective manufacturing, making it easier to adapt to various forms and curves while maintaining high brightness and photometric efficiency.
Implementation Method 1
The light sources emit radially
Implementation Method 2
cavities with partitions that scatter light
Data Source
AI summary
A motor-vehicle light-emitting module includes a plurality of light sources configured to emit light rays, and a plurality of cavities each having a first aperture and a second aperture opposite the first aperture. Each light source is associated with one cavity, so that at least part of the light rays emitted by each light source enters via the first aperture of the associated cavity and exits said associated cavity via the second aperture. The light sources emit radially.