DMD Vehicle Lighting for Car2X Signal Detection
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Solution Overview
Problem
Existing vehicle-to-vehicle (Car2Car) and vehicle-to-X (Car2X) communication systems face limitations in signal range and accuracy due to insufficient sensitivity and spatial detection of phototransistors or photodiodes, leading to increased costs and reliability issues with the requirement for proprietary components like DMDs and video cameras.
Innovation Solution
Integrating a digital micromirror device (DMD) within the vehicle lighting system, where an illumination unit controls the mirror surface and a secondary imaging unit with an optical sensor is associated with the DMD, allowing for efficient detection of Car2Car and Car2X signals using existing vehicle parts and enabling detection in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phototransistors or photodiodes are used for Car2Car signal detection, then the system can detect light signals, but the detection accuracy and sensitivity are insufficient
Solution Approach 1:
The patent combines the lighting device and communication detection device into a single integrated system. The lighting device includes a light source, optical elements, and a sensor array that simultaneously performs illumination and Car2Car signal detection functions, eliminating the need for separate proprietary detection components
Solution Approach 2:
The lighting device is designed to perform multiple functions: providing illumination for the vehicle and simultaneously detecting Car2Car communication signals. The sensor array within the lighting device can detect light signals from other vehicles while the illumination unit provides necessary lighting, making the system universal and multi-functional
2Reliability
If proprietary components like DMD and video cameras are used for Car2Car communication, then signal detection capability is achieved, but system cost increases
Solution Approach 1:
The patent merges the lighting device with Car2Car communication detection functionality, using existing vehicle lighting components instead of proprietary DMD and video camera systems. This integration significantly reduces system cost while maintaining communication reliability
Solution Approach 2:
The lighting device serves dual purposes as both an illumination system and a Car2Car signal detection system. By making the lighting device universal, the patent eliminates the need for separate proprietary communication hardware, thereby reducing manufacturing costs
3Adaptability or versatility
If a separate Car2Car detection system is implemented, then signal detection function is achieved, but device complexity increases
Solution Approach 1:
The patent combines the Car2Car detection function with the existing lighting device structure. The sensor array within the lighting device detects communication signals while sharing the same housing, mounting, and power supply infrastructure, thereby reducing overall system complexity
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
This solution simplifies the communication system, reduces costs by utilizing existing components, and enhances the detection accuracy and reliability of Car2Car and Car2X signals, allowing for effective communication in various vehicle orientations and integration with other safety systems.
Implementation Method 1
the image of only those areas by which the transmitted car2car or car2X signal is detected and subsequently decoded by the control electronics is reflected by selected mirrors of the mirror surface of the DMD to the optical sensor of the secondary imaging unit
Implementation Method 2
the optical sensor of the secondary imaging unit... adapted to receive a selected part of the light from a scene image reflected by a selected part of the mirrors of the DMD mirror surface
Data Source
AI summary
The invention relates to a communication device of a motor vehicle (X), comprising an imaging camera (2) of a scene image (11) connected to control electronics (1), to which a DMD (7) is connected, the mirror surface (70) of which is preceded by optics (3), whereby the mirror surface (70) is functionally associated with a secondary imaging unit (5) having an optical sensor (50) adapted to receive a selected part of the light (32) from the scene image (11) reflected by a selected part of the mirrors of the mirror surface (70) of the DMD (7). The DMD (7) is part of the vehicle lighting device (0) in which an illumination unit (4) is arranged towards the mirror surface (70) of the DMD (7), the illumination unit (4) being adapted to illuminate controllably at least a part of the mirror surface (70) of the DMD (7) and to emit the desired light output beam (30).In addition, the invention relates to a lighting device (0) of a motor vehicle for a communication device of a motor vehicle and a car2car or car2X communication method for a motor vehicle.