Vehicle Rollo Screen Lighting Integration
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Solution Overview
Problem
Existing open roof constructions for vehicles lack efficient and reliable lighting solutions that also simplify the design and enhance aesthetics, while maintaining the structural integrity and functionality of the rollo assembly.
Innovation Solution
Integration of light emitting members, such as light transmitting fibers, into the rollo screen, activated through connections at the interface between the rollo screen edge and the stationary part of the open roof construction, allowing for improved reliability, simplified design, and aesthetic appeal, with options for manual or automatic activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting members are integrated into the rollo screen with connections at the interface, then the lifespan and reliability of connections are improved, but the device complexity increases
Solution Approach 1:
The patent extracts the lighting function from the moving rollo screen and places the light sources in the stationary transverse member. Only the lightweight light transmitting fibers remain in the rollo screen, while the complex electrical connections and power sources are removed from the moving assembly, thereby improving reliability by eliminating connections in the moving part.
Solution Approach 2:
The patent introduces light transmitting fibers as an intermediary between the stationary light sources and the moving rollo screen. These fibers transmit light without requiring electrical connections in the moving assembly, resolving the contradiction by enabling lighting functionality while maintaining connection reliability through the use of an intermediary medium that doesn't require electrical connectivity in the moving part.
2Device complexity
If light sources are housed in a transverse member, then the design is simplified and structural integrity is maintained, but the overall height of the rollo assembly increases
Solution Approach 1:
The patent nests the light sources within the hollow interior of the transverse member, utilizing the existing structural space. The light sources are positioned inside the hollow profiled member, and light transmitting fibers extend through openings in the transverse member to reach the rollo screen, thereby accommodating the lighting system without significantly increasing the overall height.
3Illumination intensity
If multiple light transmitting fibers are used, then lighting coverage is improved, but the quantity of materials and connection complexity increases
Solution Approach 1:
The patent merges multiple light transmitting fibers into bundled groups, with each bundle connected to a single light source. This combining approach allows multiple fibers to work together for improved lighting coverage while reducing the number of individual connections required, as one light source serves an entire bundle rather than requiring separate connections for each fiber.
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 the lifespan and reliability of connections, simplifies design, and provides flexible lighting options while maintaining the structural integrity and minimizing the overall height of the rollo assembly, with the ability to reduce material usage and prevent shadow formation.
Implementation Method 1
the light emitting members comprise light transmitting fibers provided in or on the rollo screen, which at said interface are connected to at least one light source provided at said stationary part of the open roof construction
Data Source
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AI summary
An open roof construction for a vehicle comprises a roof opening (1) in a stationary roof part (2) and a rollo assembly (4) positioned below said roof opening intended for covering the roof opening (1). The rollo assembly (4) comprises a rollo screen (5) and a winding shaft (6) for the rollo screen which is rotatable around a stationary axis of rotation (7), and the rollo screen (5), starting from the winding shaft (6), firstly extends in a first direction (D1), next around a reversal member (8) and finally back in an opposite second direction (D2) and ends at a rollo screen edge (9) which is attached to a stationary member (10) of the open roof construction. The reversal member (8) is movable in parallel to said first and second directions (D1,D2) in correspondence with the amount of rollo screen (5) being wound on or off said winding shaft (6). The rollo screen (5) is provided with light emitting members (14) which are activated through connections provided at the interface between said rollo screen edge (9) and a stationary part (15) of the open roof construction.