Vehicle Head-Up Display Center-Axis Rotation
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Solution Overview
Problem
Conventional horizontal type combiner head-up displays for vehicles suffer from slow deployment speed and distorted virtual images due to the rotation of the combiner around its bottom axis, leading to user misrecognition and eye strain.
Innovation Solution
A head-up display system where the combiner is tilted based on a virtual center axis traversing left and right, utilizing a moving unit, driving unit, and tilting unit to form a cycloid trajectory, preventing changes in the reflection position of display light and minimizing image deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the combiner rotates around the bottom axis in a conventional horizontal type combiner HUD, then the combiner can be deployed and angled adjusted, but the deployment speed is slow and the angle adjustment depends on the lead screw lead and motor speed
Solution Approach 1:
The patent inverts the conventional rotation approach by rotating the combiner around its center axis instead of the bottom axis. This inversion allows the combiner to be positioned directly in front of the user's eye without requiring complex lead screw mechanisms, thereby significantly increasing deployment speed while reducing mechanical complexity
Solution Approach 2:
The patent extracts and removes the lead screw mechanism from the system by implementing direct rotation around the center axis. This elimination of the lead screw component simplifies the overall device structure, reduces the number of parts, and enables faster deployment without the constraints of screw lead and motor speed limitations
2Manufacturing precision
If the combiner rotates around the bottom axis, then the combiner can be positioned, but the reflection position of display light changes front and back and top and bottom causing virtual image deformation
Solution Approach 1:
The patent inverts the rotation axis from the bottom to the center of the combiner. This inversion ensures that when the combiner rotates, the reflection position of display light remains stable and does not shift front-back or top-bottom, thereby preventing virtual image deformation and improving both manufacturing precision and user comfort
Solution Approach 2:
The center-axis rotation mechanism serves itself to maintain stable light reflection automatically during rotation. The geometric properties of center-axis rotation inherently prevent image deformation without requiring additional correction mechanisms, allowing the system to self-maintain image stability throughout the deployment process
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 ensures a stable and clear virtual image for the user, reducing eye strain and eliminating the need for expensive aspheric combiners, while improving the combiner's resolution and deployment speed.
Implementation Method 1
a combiner is received in a vehicle and deployed... a combiner enters or exits through the entrance... when the combiner rotates toward an optimal position of the user's eye in the state in which the lighting apparatus V outputs display light to the combiner M
Data Source
AI summary
Disclosed is a head-up display for a vehicle. The head-up display includes a housing having an internal space formed therein and an entrance formed on one side thereof, a holder unit having a combiner coupled to one side of the holder unit, a moving unit positioned in the internal space of the housing, rotatably coupled to the holder unit, and coupled to the housing in such a way to reciprocate, a driving unit coupled to the moving unit and configured to move the moving unit, and a tilting unit coupled to the moving unit in such a way to slide and coupled to the driving unit, wherein when the tilting unit is moved by the driving unit, the combiner is tilted to form a cycloid trajectory based on a virtual center axis that traverses the combiner left and right.