Shutter Mechanism for Vehicle Head-Up Display Housing Protection
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Solution Overview
Problem
Head-up displays mounted on vehicles are prone to degradation or breakage due to exposure of internal components to sunlight and foreign substances through openings in the housing, which compromise their reliability and longevity.
Innovation Solution
A display apparatus with a housing featuring a top plate and opposed side plates, a shutter mechanism that moves along these plates to fully close the opening, and a moving mechanism using slide members and transmission members to amplify movement, ensuring the shutter can open and close the opening effectively, protecting internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If openings are formed in the housing for moving the combiner and for the optical path, then the combiner can be moved and function properly, but the interior of the housing is exposed to sunlight and foreign substances causing degradation
Solution Approach 1:
The shutter is positioned to close the opening in the top plate before the combiner is moved into the housing. This preliminary closing action protects the internal components from sunlight and foreign substances during the combiner insertion process, while still allowing the opening to be used for its intended optical and mechanical functions when the shutter is open
Solution Approach 2:
The shutter is designed as a movable component that can dynamically open and close the top plate opening based on operational requirements. When the combiner needs to be moved, the shutter opens to allow access; when protection is needed, the shutter closes to seal the opening, thus providing adaptive protection without compromising functionality
2Reliability
If a shutter mechanism is added to close the opening, then protection against external elements is improved, but the device complexity increases
Solution Approach 1:
The shutter mechanism is integrated with the existing combiner moving mechanism. The same motor and control system that moves the combiner also drives the shutter, combining two functions into one mechanical system. This reduces the overall device complexity while still providing the necessary protection function
Solution Approach 2:
The shutter serves multiple functions: it protects the housing opening from sunlight and foreign substances, it can be integrated with the combiner moving mechanism for coordinated operation, and it maintains the optical path when open. This multi-functionality justifies the added complexity by providing multiple benefits from a single component
3Reliability
If the shutter is designed to fully close the opening, then protection is maximized, but the space required for shutter movement increases
Solution Approach 1:
The shutter is designed to nest within the housing structure when closed, with its movement path integrated into the existing housing geometry. The shutter can be positioned to close the opening completely while its drive mechanism and movement space are nested within the housing volume, minimizing the additional space required
Solution Approach 2:
The shutter movement is designed to utilize the depth dimension of the housing rather than requiring additional lateral space. By moving the shutter along the depth axis of the housing, the design achieves full closure capability while maintaining a compact overall footprint suitable for vehicle dashboard integration
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 provides a compact, reliable, and durable head-up display apparatus that minimizes exposure of internal components to external elements, enhancing its operational lifespan and reliability while maintaining a compact design suitable for vehicle integration.
Implementation Method 1
a transmission member configured to transmit an amount of movement of the first slide member to the second slide member while increasing the amount of movement
Data Source
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AI summary
A display apparatus includes: a housing including a top plate having an opening and two opposed side plate units; a display member capable of moving through the opening; a shutter configured to open and close the opening; and a moving mechanism provided on at least one of the two side plate units, the moving mechanism including a first slide member and a second slide member each moving along the at least one side plate unit and a transmission member transmitting an amount of movement of the first slide member to the second slide member while increasing the amount of movement, wherein the shutter moves according to movement of the second slide member.