HUD Reflection Element Assembly With Rear Bearing Pivot Axis
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Solution Overview
Problem
Existing reflection devices for head-up displays in vehicles have visible connection interfaces and require additional space, affecting vibration behavior and image quality.
Innovation Solution
The reflection device features a bearing arrangement on the back side of the reflection element, allowing the pivot axis to be completely behind the element, reducing visible connections and minimizing space requirements while maintaining vibration stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection interfaces are arranged laterally outside of the reflection element, then assembly of the mirror is eased, but the connection interfaces become visible from the optical chamber and additional space is required
Solution Approach 1:
The connection interfaces are moved from a lateral arrangement (in the plane of the reflection element) to a rearward arrangement (behind the reflection element in the depth dimension). This dimensional shift allows the connection interfaces to remain hidden from the optical chamber while still facilitating assembly, as the interfaces are positioned in a different spatial plane that does not interfere with the optical path.
2Ease of manufacture
If connection interfaces are arranged laterally outside of the mirror, then assembly is facilitated, but additional package space is required in the motor vehicle
Solution Approach 1:
The connection interfaces are repositioned from a lateral arrangement that extends the device's footprint to a rearward arrangement that utilizes the depth dimension. This allows the overall lateral dimensions and package space requirements to be reduced, as the connection interfaces are contained within the existing lateral boundaries of the reflection element rather than extending beyond them.
3Stability of the object's composition
If the pivot axis is arranged to pass through the reflection element, then the center of gravity can be positioned on the axis, but connection interfaces become visible and additional space is required
Solution Approach 1:
The bearing structure is divided into separate components: the bearing element that provides the pivot axis and the support structure that holds it. This segmentation allows the pivot axis to be positioned behind the reflection element rather than passing through it, enabling the connection interfaces to be hidden while maintaining the vibration stability achieved by having the center of gravity on the pivot axis.
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 design provides a compact reflection device with improved vibration behavior and image quality by eliminating visible connections and optimizing space usage.
Implementation Method 1
the reflection device is configured to reflect radiation emitted by an image generation unit
Data Source
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AI summary
The present invention relates to a reflection device (100) for a head-up display, to a reflection element assembly (10), to a head-up display and to a motor vehicle, wherein the reflection device (100) is configured for reflecting of radiation emitted by an image generation unit, wherein the reflection device (100) comprises a reflection element (11) having a reflection side (22) and a back side (23) being arranged on the side remote from the reflection side (22), and a carrier (17) supporting the reflection element (11); wherein the reflection element (11) is movably coupled to the carrier (17) by at least one bearing (12A, 12B) such that the reflection element (11) is pivotable relatively to the carrier (17) about at least a first axis (A), wherein the carrier (17) is being couplable to a housing, preferably to a housing of a head-up display, or directly to a vehicle body, and wherein the at least one bearing (12A, 12B) is arranged at the back side (23) of the reflection element such that the first axis (A) is extending completely behind the back side (23) of the reflection element (11).