Head-Up Display Eye-Position Control for Stable Image Visibility
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Solution Overview
Problem
Head-up displays (HUDs) mounted on movable bodies, such as vehicles, face challenges in maintaining image visibility as user eye positions change due to sitting posture or height, leading to reduced image accessibility.
Innovation Solution
A head-up display system comprising a detector to track user eye positions, a reflective optical element, a controller, and an obtainer, which adjusts the image display position on a display panel based on detected eye positions to ensure the image remains easily viewable, regardless of user eye position changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display position is fixed on the display panel, then the device complexity is reduced, but the image visibility deteriorates when user eye positions change
Solution Approach 1:
The display position on the display panel is made dynamic rather than fixed. The controller adjusts the display position based on detected eye position information, allowing the image to adapt to different user viewing positions while maintaining visibility reliability
Solution Approach 2:
The system implements a feedback loop where the detector continuously monitors eye position, the obtainer processes this information, and the controller adjusts the display position accordingly. This closed-loop feedback mechanism ensures the image remains visible despite changes in user position
2Ease of operation
If the display position is adjusted according to eye position, then the image accessibility is improved, but the device complexity increases due to additional components
Solution Approach 1:
The controller performs multiple functions: it controls the display position based on eye position information and also manages the reflective optical element. By consolidating these control functions in a single component, the system achieves improved image accessibility without proportionally increasing overall device complexity
Solution Approach 2:
The obtainer acts as an intermediary component that processes eye position information from the detector and translates it into control signals for the controller. This intermediary layer simplifies the interface between detection and control functions, making the overall system more manageable despite the added complexity of adaptive positioning
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 system effectively maintains image visibility for the user by dynamically adjusting the display position in accordance with eye position changes, ensuring the image remains accessible and clear, even when user eye positions shift.
Implementation Method 1
a reflective optical element 4 that reflects image light from the first image 11 displayed by the display panel 6
Data Source
AI summary
A head-up display includes a display panel, a reflective optical element, a controller, and an obtainer. The display panel displays a first image. The reflective optical element reflects image light from the first image displayed by the display panel. The controller controls a position at which the first image is displayed on the display panel. The obtainer obtains, as positional information, a position of an eye of a user. The controller changes the position at which the first image is displayed on the display panel in accordance with the positional information.