HUD Reflecting Member Vibration Synchronization via Elastic Transmitter
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Solution Overview
Problem
Head-up display devices experience reduced visibility due to the reflecting member not vibrating in synchronization with the vehicle, causing displayed information to sway differently, which worsens with increased information display.
Innovation Solution
A head-up display device with a vibration transmitting member that is elastically compressed and contacts the housing or reflecting member across its entire rotatable range, ensuring synchronization of vibrations with the vehicle, thereby maintaining stable information display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reflecting member is supported rotatably on a housing with a movable portion (rotating shaft and bearing), then the position of the reflecting member can be adjusted to match driver sight line height, but looseness and allowance in the movable portion cause the reflecting member to vibrate differently from vehicle vibration, reducing visibility
Solution Approach 1:
A vibration transmitting member with elastic properties is introduced as an intermediary between the housing and the reflecting member. This intermediary component transmits vehicle vibrations to the reflecting member while maintaining the necessary mechanical connection, ensuring the reflecting member vibrates in synchronization with the vehicle rather than independently.
Solution Approach 2:
The physical state of the connection between housing and reflecting member is changed from a rigid mechanical connection (rotating shaft and bearing) to an elastic connection. The vibration transmitting member's elastic properties allow it to deform and transmit vibrations effectively, changing the dynamic characteristics of the system to achieve synchronized vibration with the vehicle.
2Quantity of substance
If the amount of information displayed on the windshield is increased, then more useful information is provided to the driver, but visibility significantly lowers due to the swaying of information caused by unsynchronized vibration of the reflecting member
Solution Approach 1:
The vibration transmitting member serves as a mediator that couples the housing vibrations to the reflecting member, ensuring that even when large amounts of information are displayed, the reflecting member remains stable relative to the driver's sight line by vibrating in synchronization with the vehicle.
3Reliability
If the vibration transmitting member is fixed to the housing and reflects member with elastic compression throughout the entire rotatable range, then vibration synchronization is achieved, but the structural complexity increases
Solution Approach 1:
The vibration transmitting member combines multiple functions into a single component: it serves as both the mechanical connection element and the vibration transmission element. By integrating these functions, the patent avoids the need for separate vibration isolation or damping mechanisms, thereby reducing overall structural complexity while achieving vibration synchronization.
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 that the reflecting member vibrates in sync with the vehicle, preventing information sway and maintaining visibility even with increased information display.
Implementation Method 1
a vibration transmitting member that is provided between the housing and the reflecting member and has elasticity
Data Source
AI summary
A head-up display device includes a housing, a reflecting member, a projection light emitting unit, and a vibration transmitting member. The housing is fixed to a vehicle. The reflecting member is rotatably supported by the housing and is held at a rotation position. The projection light emitting unit projects projection light corresponding to information onto a window of the vehicle through the reflecting member. The vibration transmitting member is provided between the housing and the reflecting member and has elasticity. The vibration transmitting member is fixed to the housing and makes contact with the reflecting member in an elastically compressed state in an entire rotatable range of the reflecting member.