Vehicle Head-Up Display Combiner Retraction Mechanism
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Solution Overview
Problem
Conventional head-up display devices for vehicles, particularly combiner-type HUDs, can distract drivers when not needed and require inconvenient adjustments, and lack a fail-safe mechanism for external forces or malfunctions.
Innovation Solution
A head-up display device with a combiner that moves up and down from a housing and a shutter that opens and closes in a sliding manner, driven by a motor and cam system, with a fail-safe mechanism using a TACT switch and motor rotation detection sensor to prevent interference and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the combiner is positioned in front of the driver, then the driver can check driving-related information, but the combiner distracts the driver's attention when not needed
Solution Approach 1:
The combiner is designed to be movable rather than fixed, allowing it to be positioned in front of the driver when needed and retracted when not needed. The combiner can move along a guide plate and be held at different positions, enabling dynamic adjustment to eliminate distraction while maintaining accessibility to driving information.
Solution Approach 2:
The combiner assembly is divided into separate functional components including the combiner itself, a holder, and a drive mechanism. This segmentation allows independent control of the combiner's position and the shutter's position, enabling precise management of when the combiner is visible to the driver.
2Manufacturing precision
If the combiner position is adjusted to accommodate driver's eye height, then the virtual image is not distorted, but the device complexity increases
Solution Approach 1:
The combiner assembly is designed to perform multiple functions: it can be positioned at different heights to accommodate various driver eye levels, it can be tilted to adjust the angle of the virtual image, and it can be retracted when not needed. This multi-functionality is achieved through a integrated mechanism combining vertical movement along the guide plate with rotational adjustment capability.
3Reliability
If a shutter is added to protect the combiner, then the combiner is protected from external forces, but the device complexity increases
Solution Approach 1:
The shutter mechanism is merged with the combiner drive mechanism, sharing common components such as the motor, cam, and linkage system. The shutter and combiner are controlled by the same operation device, reducing the need for separate control systems and minimizing overall device complexity while maintaining protection functionality.
4Reliability
If the combiner and shutter movements are interlocked, then interference between components is prevented, but the operation device complexity increases
Solution Approach 1:
A cam mechanism serves as an intermediary between the motor and the combiner/shutter assembly. The cam converts the motor's rotational motion into coordinated linear movements of both the combiner and shutter, ensuring they move in the correct sequence and preventing interference while simplifying the control logic.
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 allows for convenient and safe operation by adjusting the combiner's position based on driver needs, preventing distractions and ensuring the device functions correctly even under external forces or malfunctions.
Implementation Method 1
a cam disposed to both side surfaces of the housing to interlock the combiner device with the shutter device by using the motor
Implementation Method 2
a mirror disposed opposite to the display and configured to reflect the image provided by the display
Data Source
AI summary
A head-up display device for a vehicle includes a housing including a guide plate forming first and second surfaces thereof, the housing mounted on a dashboard of a vehicle, a display disposed in the housing for generating an image, a mirror disposed opposite from the display for reflecting the image provided by the display, a combiner device including a combiner for providing the image reflected from the mirror to a driver, and for moving vertically in opposed first and second directions relative to the housing, a shutter device including a shutter disposed on an upper portion of the housing for opening and closing the combiner in a sliding manner, and an operation device disposed in the housing for engaging a sliding movement of the shutter with a movement of the combiner device.