HUD Optical Mechanism Distance Adjustment for Startup Reliability
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Solution Overview
Problem
Existing head-up display (HUD) devices often fail to perform a suitable operation during startup, leading to inefficiencies and potential unnecessary drive control.
Innovation Solution
A display device with a light projector, optical mechanism, concave mirror, and actuators, controlled by a controller to adjust the virtual image distance and projection, ensuring proper operation at startup by changing the distance and projecting an opening image during vehicle startup and shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display device starts operation without distance adjustment, then the operation start is simple and fast, but the virtual image distance is not optimized for viewing
Solution Approach 1:
The system performs preliminary distance adjustment of the optical mechanism before the main display operation begins. The controller activates the first actuator to position the optical mechanism at an appropriate distance from the windshield, ensuring optimal virtual image formation is ready before the driver needs to view the display.
Solution Approach 2:
The optical mechanism is designed with dynamic adjustability through the first actuator, allowing the distance between the optical mechanism and the windshield to be changed during operation. This enables the system to adapt the virtual image distance based on driving conditions, driver preferences, or environmental factors.
2Adaptability or versatility
If the optical mechanism distance is adjusted frequently, then the virtual image distance is optimized for different conditions, but the device complexity increases
Solution Approach 1:
The distance adjustment function is segmented into a dedicated first actuator that operates independently from other display control mechanisms. This modular approach allows the optical mechanism to be adjusted without affecting other display parameters, simplifying the overall control architecture despite the added adjustment capability.
Solution Approach 2:
The system changes the physical parameter of the optical mechanism distance to achieve different virtual image distances. By adjusting this single parameter through the first actuator, the system achieves adaptability without requiring complex changes to other display parameters or mechanisms.
3Duration of action of stationary object
If the light projector operates during distance adjustment, then the display is continuously visible, but the image quality may be degraded during adjustment
Solution Approach 1:
The light projector operates periodically during the distance adjustment process, projecting images at intervals rather than continuously. This allows brief moments for the optical mechanism to settle into its target position, ensuring image quality is maintained while still providing continuous visual feedback to the driver.
Solution Approach 2:
The system performs preliminary distance adjustment before full display operation begins. During this preliminary phase, the light projector may operate at reduced intensity or with simplified imagery, preparing the optical path before full-quality image projection commences.
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
Enables a suitable operation at startup, enhances entertainment value by checking the function's ability to change the virtual image distance, and avoids unnecessary drive control by maintaining the virtual image at the correct distance during vehicle operation.
Implementation Method 1
a concave mirror configured to reflect light passing through the optical mechanism toward a reflector
Implementation Method 2
an optical mechanism provided on a path of the light and capable of adjusting a distance from a predetermined position to a position where the light is formed as a virtual image
Data Source
AI summary
A display device includes a light projector configured to project light including an image, an optical mechanism provided on a path of the light and capable of adjusting a distance from a predetermined position to a position where the light is formed as a virtual image, a concave mirror configured to reflect light passing through the optical mechanism toward a reflector, a first actuator configured to adjust the distance in the optical mechanism, and a controller configured to control the light projector and the first actuator. The controller causes the first actuator to change the distance and causes the light projector to project light including an opening image, at a time of an operation start of the display device.