Cabin Projection System for Driver Alerting
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Solution Overview
Problem
Current Advanced Driver Assistance Systems (ADAS) face challenges in implementing a compact projection device for vehicle cabin windows that does not hinder the driver, particularly in providing effective alerts for hazardous situations without obstructing the view.
Innovation Solution
A projection system using a digital mirror device and a housing with an optically inverse reflective surface to project signal data on the windscreen and side windows, allowing for a unified image presentation that directs the driver's attention to both visible and invisible objects in the vehicle's blind spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a projection device is implemented in the vehicle cabin to project warning signals on the windscreen, then driver alertness and road safety are improved, but the device may obstruct the driver's view and create hindrance in the cabin
Solution Approach 1:
The patent positions the projection device at the rear of the cabin rather than in front, utilizing the rearward spatial dimension. This allows the device to project images on the windscreen without occupying front cabin space that would obstruct the driver's forward view, thus resolving the contradiction between improving driver alertness and avoiding view obstruction
Solution Approach 2:
The patent introduces a reflective surface (such as the windscreen itself) as an intermediary medium. The projection device projects images onto this reflective surface, which then displays the warning signals to the driver. This intermediary approach allows the projection system to function effectively without the physical presence of large projection components in the driver's direct line of sight
2Volume of moving object
If a compact projection device is designed to fit in the cabin, then space utilization is improved, but the projection quality and image clarity may deteriorate
Solution Approach 1:
The patent divides the projection system into separate functional components: a projection device at the rear, a reflective surface (windscreen), and optical elements positioned strategically. This segmentation allows each component to be optimized independently - the projection device can be compact while the reflective surface provides the necessary image display area, maintaining projection quality without requiring a large integrated device
Solution Approach 2:
By utilizing the rearward direction and the reflective surface of the windscreen as a projection medium, the system achieves effective projection quality without requiring large projection optics in the front cabin. The image is projected backward and reflected forward, allowing compact device design while maintaining adequate image clarity on the large windscreen surface
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 driver alertness by projecting critical information directly onto the line of sight, improving road safety by alerting drivers to both visible and invisible objects, thereby reducing the risk of collisions.
Implementation Method 1
a housing, to be configured at an elevated position in the cabin. The housing comprising a digital mirror device, the digital mirror device arranged pattern the beam of the light source to project an image on at least a front and side window portion of the cabin
Implementation Method 2
Part of the housing is shaped with a reflective surface that is optically inverse to the cabin window geometry, so that, when the digital mirror device projects a single image on the optical surface, it is imaged on the windscreen and at least one of side windows
Data Source
AI summary
It is aimed to provide a projection system for projecting signal data on a windscreen or side screens of a motor vehicle cabin. The system comprises a light source arranged for emitting a beam and a housing, to be configured at an elevated position in the cabin. The housing comprising a digital mirror device, the digital mirror device arranged pattern the beam of the light source to project an image on at least a front and side window portion of the cabin. Part of the housing is shaped with a reflective surface that is optically inverse to the cabin window geometry, so that, when the digital mirror device projects a single image on the optical surface, it is imaged on the windscreen and at least one of side windows.