Rear Under View Mirror Marker Indicator for Vehicle Boundary Recognition
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Solution Overview
Problem
Existing vehicle rear viewing devices face challenges in accurately determining the position of the lower rear end of a vehicle body due to obstruction by the rear wiper and other projections on the windshield, making it difficult for drivers to gauge the vehicle's clearance when reversing.
Innovation Solution
A vehicle rear viewing device incorporating a rear under view mirror and a marker indicator, where the marker indicator is positioned to be partially or fully covered by the rear wiper in its initial position, allowing the reflected image of the marker to coincide with the vehicle's rear end on the mirror, enhancing visibility without degrading the vehicle's appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the marker indicator is placed on the rear windshield to assist rear viewing, then the driver can recognize the vehicle rear end position, but the marker indicator degrades the vehicle appearance and creates external visibility issues
Solution Approach 1:
The marker indicator is extracted from its traditional external placement on the rear windshield and repositioned to the interior surface. This removes the visual degradation from the external appearance while preserving the functional benefit of position recognition through the rear under view mirror reflection
Solution Approach 2:
The rear under view mirror serves as an intermediary element that transfers the marker indicator's visual information from the interior surface to the driver's field of view. The marker is placed on the interior surface, reflected by the rear under view mirror, and thus becomes visible to the driver without being externally visible
2Measurement precision
If the marker indicator is placed on the rear windshield, then it provides position reference, but it creates blind spots when the rear wiper is in initial position
Solution Approach 1:
The marker indicator is relocated from the two-dimensional exterior surface of the rear windshield to the interior surface, creating a different spatial dimension for marker placement. This allows the marker to be positioned in an area not obstructed by the rear wiper's movement path, eliminating the blind spot issue while maintaining position reference functionality
3Measurement precision
If projections are placed on the rear windshield to mark vehicle boundaries, then position reference is provided, but they obstruct the driver's view and degrade appearance
Solution Approach 1:
The boundary marking function is extracted from physical projections on the exterior rear windshield and transferred to a two-dimensional marker indicator on the interior surface. This eliminates the three-dimensional obstruction caused by projections while maintaining the boundary marking capability through optical reflection
Solution Approach 2:
Instead of using physical projections that occupy space and obstruct view, a two-dimensional marker indicator is used that creates a visual copy of the boundary reference. The marker provides the same informational function (vehicle boundary position) without the physical obstruction, as it is viewed through reflection rather than direct line of sight
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
Enables accurate recognition of the vehicle's rear end position without creating blind spots, maintaining a clean appearance by concealing the marker indicator from external view and providing flexibility in placement to suit various vehicle designs.
Implementation Method 1
a rear under view mirror which faces an inner surface of a rear windshield and reflects an area below and behind a vehicle to an occupant in an interior of the vehicle
Data Source
AI summary
A vehicle rear viewing device includes a rear under view mirror provided to face an inner surface of a rear windshield and capable of reflecting an area below and behind a vehicle to an occupant in an interior of the vehicle. A marker indicator is to allow the occupant to view the area below and behind the vehicle through the rear under view mirror to visually recognize a position of a rear end of a vehicle body. A rear wiper is provided on a rear part of the vehicle body so as to face an outer surface of the rear windshield. The marker indicator is provided so as to be covered with at least a part of the rear wiper along a front rear direction of the vehicle in front of the rear wiper when the rear wiper is in an initial position.