Vehicle Window Light Guide Mounting for Precise Lamp Positioning
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Solution Overview
Problem
Existing vehicle window panes with light guide layers and lighting devices face challenges in accurately positioning the lamp relative to the light-incoupling unit, leading to inefficiencies in light distribution.
Innovation Solution
The lamp is mounted on a support plate with a fastening device that includes at least one fastening dome protruding from the light-incoupling unit. This fastening dome engages with a corresponding fastening cutout on the support plate, allowing for precise positioning and secure attachment of the lamp.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lamp is mounted directly on the light-incoupling unit without a support plate, then the device complexity is reduced, but the positional accuracy of the lamp relative to the light-incoupling unit deteriorates
Solution Approach 1:
The mounting structure is segmented into a support plate and the light-incoupling unit as separate components. The support plate serves as an intermediate carrier that provides precise positioning features (fastening cutouts) for the lamp, while the light-incoupling unit remains a distinct optical component. This segmentation allows each component to be optimized independently for its specific function.
Solution Approach 2:
The support plate acts as an intermediary component between the lamp and the light-incoupling unit. It provides a stable mounting base with precisely positioned fastening cutouts that ensure accurate positioning of the lamp relative to the light-incoupling unit, thereby improving positional accuracy without requiring direct integration of the lamp into the light-incoupling unit.
2Manufacturing precision
If the fastening cutout is made small to secure the lamp, then the positional accuracy is improved, but the ease of inserting the fastening dome deteriorates
Solution Approach 1:
The fastening cutout is designed with dynamic characteristics through the inclusion of a soft region that can elastically deform during the insertion process. The cutout transitions from a rigid opening to a flexible aperture that can expand to accommodate the fastening dome, then returns to its original shape to secure the component in place. This dynamic behavior resolves the contradiction between small size for precision and large size for ease of insertion.
Solution Approach 2:
The physical state of the fastening cutout is changed by introducing a soft region with elastic properties. The cutout's dimensions are not fixed but can dynamically change during insertion - expanding to allow the fastening dome to pass through, then contracting to provide a secure fit. This parameter change enables the cutout to satisfy both the precision requirement (small final size) and the ease of operation requirement (larger effective size during insertion).
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 ensures high positional accuracy of the lamp relative to the light-incoupling unit, enhancing light distribution and fixing the support plate securely in place, thereby improving the overall performance of the vehicle window pane.
Implementation Method 1
the substantially deformation-resistant support plate comprises at least one soft region which delimits the fastening cutout and is made to be elastically deformable, wherein a spreading portion of the fastening dome spreads the fastening cutout by elastically deforming the soft region
Data Source
AI summary
A vehicle window pane includes a light guide layer and a lighting device which introduces light from a lamp into the light guide layer via a light-incoupling unit arranged on the light guide layer. The lamp is mounted on a support plate and a fastening device keeps the support plate fixed in such a position on the light-incoupling unit in which the lamp is correctly positioned to radiate light into the light-incoupling unit. The fastening device comprises at least one fastening dome which protrudes from the light-incoupling unit and projects into a fastening cutout in the support plate. The substantially deformation-resistant support plate comprises at least one soft region which delimits the fastening cutout. A spreading portion of the fastening dome spreads the fastening cutout by elastically deforming the soft region.