Head-Up Display Aspherical Mirror Reinforcement for Mount Stability
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Solution Overview
Problem
The existing head-up display systems face issues with the rigidity of the aspherical mirror, particularly in the central area, which can lead to problems such as breakage and bonding failure when external forces are applied.
Innovation Solution
The proposed solution involves using elastomers in a rigidity reinforcement portion formed in the central area of the aspherical mirror to increase its rigidity, and restricting the movement of spherical mounts using a stopper formed in the mounting groove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the aspherical mirror uses a simple beam structure, then the manufacturing is simple, but the rigidity in the central area is low leading to breakage and bonding failure
Solution Approach 1:
The aspherical mirror is divided into a central area and a peripheral area, with the central area having a different thickness than the peripheral area. This segmentation allows the central area to have enhanced rigidity while maintaining the overall simplicity of the mirror structure.
Solution Approach 2:
The central area of the aspherical mirror is given a greater thickness compared to the peripheral area, creating local quality variation. This localized thickening provides additional rigidity precisely where it is needed (in the central area with lowest stiffness) without unnecessarily increasing the complexity or weight of the entire mirror.
2Ease of operation
If the elastomer is allowed to move freely, then the display position can be adjusted, but the spherical mount cannot be fixed without permanent deformation
Solution Approach 1:
The mounting groove is designed to allow the elastomer to move dynamically within a predetermined range, enabling adjustment of the display position. The stopper then provides a static limiting function to prevent excessive movement and permanent deformation, creating a system that transitions between dynamic adjustment and static fixation.
Solution Approach 2:
The stopper acts as an intermediary element between the elastomer and the mounting groove, providing a mechanical limit that prevents the elastomer from moving beyond the safe range. This intermediary component enables both adjustability and reliability by defining the boundaries of elastomer movement.
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 approach enhances the rigidity of the aspherical mirror, preventing breakage and bonding issues, while allowing for controlled movement to adjust the display position according to the driver's eye height.
Implementation Method 1
increase the rigidity of an aspherical mirror by using an elastomer in a rigidity reinforcement portion formed in a central area of the aspherical mirror
Implementation Method 2
restrict the movement of a first spherical mount and a second spherical mount using a stopper formed in a mounting groove where the aspherical mirror is mounted
Data Source
AI summary
A head-up display comprising: a lower case; an aspherical mirror including at first and second ends thereof, a first spherical mount and a second spherical mount which are mounted in mounting grooves formed at first and second ends of the lower case; an upper module disposed at an upper portion of the aspherical mirror and coupled to the lower case, wherein the aspherical mirror includes a rigidity reinforcement portion located between the first spherical mount and the second spherical mount.