Vehicle Rollo Screen Lighting via Stationary Guide Light Bar
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Solution Overview
Problem
Existing rollo assemblies for vehicle open roofs face challenges in evenly distributing light across the screen, require complex optical or electrical connections, and experience wear and friction issues during movement, which affect their lifespan and operational efficiency.
Innovation Solution
A stationary elongate light bar is used to transmit light into light transmitting and emitting members, minimizing wear and friction, and is designed with a recess and chamfered walls for improved light transmission, along with retention members to prevent lateral side displacement, allowing for efficient and attractive lighting without complex connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary elongate light bar is used to transmit light into light transmitting and emitting members, then wear and friction are minimized, but the complexity of light distribution system increases
Solution Approach 1:
The patent extracts the light source from the moving rollo screen and places it in a stationary light bar positioned in the guide. This separation eliminates the need for complex optical or electrical connections between moving and stationary parts, while maintaining reliable light transmission to the rollo screen throughout its movement cycle.
Solution Approach 2:
The light bar acts as an intermediary stationary component that transmits light to the light transmitting and emitting members on the rollo screen without requiring physical contact or complex connections. The light bar mediates the lighting function while remaining separate from the moving screen assembly.
2Illumination intensity
If light transmitting and emitting members are positioned to receive light from the light bar, then lighting efficiency is improved, but the packaging height of the rollo assembly increases
Solution Approach 1:
The patent positions the light bar laterally adjacent to the rollo screen rather than above it, utilizing the lateral dimension for light transmission. This dimensional arrangement allows light to enter the light transmitting and emitting members from the side, maintaining efficient illumination while keeping the vertical packaging height minimal.
3Volume of moving object
If the elongate light bar is located laterally with respect to the rollo screen, then packaging height is minimized, but light transmission distance increases
Solution Approach 1:
The light bar is nested within or integrated into the guide structure, positioning it laterally adjacent to the rollo screen. This nested arrangement places the light source in close proximity to the light transmitting and emitting members, minimizing light transmission distance and maximizing efficiency while maintaining compact lateral dimensions.
4Reliability
If retention members are added to prevent lateral side displacement, then reliability is improved, but device complexity increases
Solution Approach 1:
The retention members are integrated with the light bar or guide structure, combining the retention function with the existing guiding mechanism. This merging approach ensures reliable lateral side retention without adding separate complex retention systems, maintaining simplicity while improving reliability.
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
The solution provides even lighting distribution across the rollo screen, reduces wear and friction, and minimizes the force required for screen movement, resulting in a reliable and long-lasting rollo assembly with attractive lighting properties, including ambient lighting when partially deployed.
Implementation Method 1
A stationary elongate light bar allows to transmit light into the end portions of the light transmitting and emitting members and this light then is evenly distributed and emitted over the entire rollo screen
Implementation Method 2
said recess may be provided with chamfered walls
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A rollo assembly intended for use in an open roof construction for a vehicle comprises a rollo screen having opposite forward and rearward sides and two opposite lateral sides, a winding tube for winding and unwinding the rollo screen at the rearward side, an operating beam connected to the forward side and having two outer ends, and two longitudinally extending guides for guiding respective ones of the outer ends of the operating beam and respective ones of the lateral sides of the rollo screen. Said lateral sides are provided with retention members cooperating with corresponding parts of the guides for retaining said lateral sides in said guides. The rollo screen is provided with light transmitting and emitting members which have an end portion extending at least up to a first one of the lateral sides of the rollo screen and wherein at least the guide intended for guiding said first one of the lateral sides is provided with at least one elongate light bar extending longitudinally along said guide in such a position that it can transmit light into said end portion of the light transmitting and emitting members.