Tilted Retractable Reflection Plate for Vehicle Display Glare Reduction
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Solution Overview
Problem
Conventional vehicle display devices suffer from external light reflection on the reflection plate during combiner rotation, causing discomfort for the driver due to brightness.
Innovation Solution
A vehicle display device with a reflection plate that protrudes and retracts along a tilted plane towards the driver's eye point, featuring a posture maintenance unit with a rack, guide groove, gear, and pin to maintain the plate's posture and reduce frictional resistance, preventing external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the combiner is rotated from folded state to standing state, then the display function is enabled, but external light reflects on the reflection face causing driver discomfort
Solution Approach 1:
The reflection plate is designed to move dynamically between folded and standing states along a tilted plane, changing its position and orientation based on operational requirements. This dynamic movement allows the system to enable display function when needed while minimizing external light reflection during transition states.
Solution Approach 2:
Instead of simple rotation in one plane, the reflection plate moves along a tilted plane that introduces an additional dimensional aspect to its movement. This tilted plane movement (where the plane is tilted toward the driver's eye point) creates a geometric relationship that prevents external light from reflecting into the driver's eyes during state transitions.
2Object-affected harmful factors
If the reflection plate moves along a tilted plane, then external light reflection is prevented, but the drive mechanism complexity increases
Solution Approach 1:
The drive mechanism is segmented into distinct functional components: a holding member that grips the reflection plate, a rack and pinion gear system for controlled movement, and a posture maintenance unit with guide grooves and rollers. This segmentation allows each component to perform its specific function efficiently, simplifying the overall complex mechanism.
Solution Approach 2:
The posture maintenance unit acts as an intermediary between the drive unit and the reflection plate. It includes guide grooves and rollers that mediate the movement, ensuring the reflection plate follows the correct tilted plane trajectory while reducing frictional resistance and maintaining proper posture during movement.
3Object-affected harmful factors
If a cover body is added to cover the retracted reflection plate, then external light reflection is blocked, but the device complexity increases
Solution Approach 1:
The cover body is merged with the existing structural elements of the device. It is positioned to cover the front portion of the retracted reflection plate and integrates with the overall housing structure, eliminating the need for a completely separate cover mechanism and reducing overall device complexity.
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 tilted movement of the reflection plate effectively prevents external light from being reflected, reducing driver discomfort and allowing for efficient operation with lower drive force requirements.
Implementation Method 1
a reflection plate arranged to protrude upward from the base and to retract in the base; a projection unit arranged to project a display image on the reflection plate
Implementation Method 2
the reflection plate is moved to protrude and retract along a movement plane which is tilted in the protruding direction toward a driver's eye point with respect to an orthogonal plane which is orthogonal to a direction of a line of sight of a driver to the reflection plate
Data Source
AI summary
Provided is a vehicle display device including a base to be mounted to a vehicle, a reflection plate which protrudes from and retracts in the base, a projection unit for projecting a display image on the reflection plate, a cover body covering a front portion in a protruding direction of the retracted reflection plate, a drive unit provided to the base for driving the reflection plate to protrude and retract, a holding member holding the reflection plate and connected to the drive unit to be driven linearly, and a posture maintenance unit provided across the holding member and the base to maintain a posture of the reflection plate. The reflection plate is moved to protrude and retract along a movement plane tilted in the protruding direction toward an eye-point with respect to an orthogonal plane orthogonal to a direction of line of sight of a driver to the reflection plate.