HUD Reflection Element Assembly for Hidden Rear-Axis Mounting
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Solution Overview
Problem
Existing head-up display reflection devices face challenges in accommodating different driver sizes due to visible connection interfaces and lateral bearing arrangements, which affect vibration behavior and require additional space, compromising image quality and design continuity.
Innovation Solution
A reflection device with a bearing axis completely behind the reflection element, allowing for a compact design without visible connections, improved vibration behavior, and seamless optical chamber integration, using a carrier that supports the reflection element pivotably about a first axis aligned with the reflection element's main axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection interfaces are arranged laterally outside the reflection element, then assembly of the mirror is easier, but the connection interfaces become visible from the optical chamber and additional space is required
Solution Approach 1:
The connection interfaces are relocated from the lateral dimension (outside the reflection element) to the longitudinal dimension (behind the reflection element). The bearing axis is positioned completely behind the back side of the reflection element, moving the connection point to a different spatial dimension where it does not interfere with the optical chamber's visual continuity.
Solution Approach 2:
The connection interfaces and bearing arrangements are extracted from the visible optical chamber space and relocated to the rear region behind the reflection element. This separates the functional connection requirements from the aesthetic and optical requirements of the front region.
2Ease of manufacture
If bearing arrangement is lateral to the reflection element, then assembly is easier, but vibration behavior deteriorates and additional package space is required
Solution Approach 1:
The bearing arrangement is relocated from the lateral dimension to the longitudinal dimension, positioning the bearing axis completely behind the back side of the reflection element. This dimensional relocation allows the connection point to be optimized for vibration characteristics (close to the reflection element's center of gravity) without compromising assembly ease.
3Ease of manufacture
If connection interfaces are arranged laterally outside the reflection element, then assembly is easier, but additional package space is required
Solution Approach 1:
The connection interfaces are repositioned from the lateral extension to the longitudinal rear region, utilizing the depth dimension behind the reflection element. This reduces the lateral footprint and overall package volume while maintaining assembly accessibility.
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 configuration reduces the device's lateral dimensions, minimizes vibration impact, and maintains image quality by eliminating visible connections and optimizing the center of gravity, resulting in a more compact, stable, and efficient head-up display system.
Implementation Method 1
the reflection element is movably coupled to the carrier by at least one bearing such that the reflection element is pivotable relatively to the carrier about at least a first axis
Implementation Method 2
Reflection devices for head-up displays and head-up displays in general, especially for motor vehicles, are well known in the art. Head-up displays usually comprise an image generation unit that generates an image and a reflection device for projecting this image
Data Source
AI summary
A reflection device for a head-up display, a reflection element assembly, a head-up display and a motor vehicle are disclosed. The reflection device is configured for reflecting of radiation emitted by an image generation unit and includes a reflection element having a reflection side and a back side being arranged on the side remote from the reflection side, and a carrier supporting the reflection element. The reflection element is movably coupled to the carrier by at least one bearing such that the reflection element is pivotable relatively to the carrier about at least a first axis. The carrier is being couplable to a housing of a head-up display, or directly to a vehicle body, and wherein the at least one bearing is arranged at the back side of the reflection element such that the first axis is extending completely behind the back side of the reflection element.