Rear-View Mirror Camera Assembly for Heat-Dissipating ECU Layout
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Solution Overview
Problem
Existing rear-view mirror systems face issues with heat dissipation due to electronic components, leading to reduced lifespan and operational inefficiencies, particularly in high-temperature conditions, and existing solutions are complex and costly.
Innovation Solution
A simplified rear-view mirror system design that eliminates coaxial cables and serializer/deserializer connections, integrates the image acquisition unit directly into the mounting assembly, and uses flexible flat connecting means for electrical connections, reducing component complexity and enhancing thermal dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic components (ECU, display device) are arranged inside the motor vehicle, then the system is compact and protected from external elements, but heat accumulates leading to overheating and reduced component lifespan
Solution Approach 1:
The ECU is extracted from the interior mounting location and repositioned to the exterior mounting assembly, separating the heat-generating component from the interior display device to prevent heat accumulation and overheating while maintaining system compactness
Solution Approach 2:
A flexible flat connecting means serves as an intermediary between the exterior ECU and interior display device, enabling electrical connection while allowing thermal separation. This mediator transmits signals while preventing direct heat transfer between components
2Reliability
If coaxial cables and serializer/deserializer connections are used for image data transmission, then high bandwidth and reliable data transfer are achieved, but device complexity and cost increase
Solution Approach 1:
The complex mechanical coaxial cable and serializer/deserializer connection system is replaced with a simplified flexible flat connecting means that directly transmits image data from the image acquisition unit to the display device, reducing mechanical complexity while maintaining transmission reliability
Solution Approach 2:
The image data transmission path is merged into a single integrated connection through the flexible flat connecting means, eliminating the need for separate coaxial cables and serializer/deserializer components, thereby simplifying the overall system architecture
3Ease of manufacture
If multiple separate components (camera module housing, lens assembly, ECU, display device) are used, then functional modularity and ease of manufacturing are improved, but the number of connections and overall system complexity increases
Solution Approach 1:
The image acquisition unit is merged directly with the mounting assembly, eliminating the need for a separate camera module housing and reducing the number of interfaces and connections required, while maintaining functional modularity for ease of manufacture
Solution Approach 2:
The mounting assembly is designed to serve multiple functions: mechanical mounting of the image acquisition unit, electrical connection through the flexible flat connecting means, and thermal management by positioning heat-generating components externally, thereby reducing overall system complexity
Data Source
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AI summary
The rear-view mirror system (100) comprises a mounting assembly (200) arranged outside a motor vehicle, and a first image acquisition unit (300) at least partially received within the mounting assembly (200) configured to acquire a captured image from the exterior of the vehicle. A display device is provided inside the motor vehicle for displaying to a user a displayed image derived at least in part from the captured image. An electronics carrier (320) comprises an ECU (500) connected to the first image acquisition unit (300) so as to generate an image signal for the display device to show the displayed image. The ECU (500) is arranged, together with the electronics carrier (320), at least partially within the mounting assembly (200).