Head-Up Display Fixed and Movable Screens
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Solution Overview
Problem
Conventional head-up display devices struggle to simultaneously display virtual images with fixed and variable display distances, leading to prolonged focus time and potential missed information for drivers.
Innovation Solution
A display device configuration using a light source, a fixed screen, a movable screen, and a scanner, where the fixed screen projects images with a fixed display distance and the movable screen projects images with a variable display distance, allowing coexistence within the same display region without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single screen is used to display all virtual images, then the device structure is simple, but the driver cannot simultaneously view images with different display distances
Solution Approach 1:
The display device is segmented into a fixed screen and a movable screen, each responsible for displaying virtual images at different display distances. The fixed screen displays virtual images at a fixed display distance, while the movable screen displays virtual images at variable display distances by moving along the optical axis. This segmentation allows simultaneous display of multiple virtual images with different display distances without requiring a completely complex new system architecture.
2Ease of operation
If the display distance of virtual images is varied to match driving speed, then the driver's point of view remains stable, but the driver cannot quickly focus on specific information
Solution Approach 1:
Information is segmented into two categories: stable information displayed on the fixed screen at a constant display distance for quick focus, and dynamic information displayed on the movable screen with variable display distance for viewing comfort. This allows the driver to quickly focus on critical information while maintaining overall viewing stability.
Solution Approach 2:
Different regions of the display system provide different qualities: the fixed screen provides a fixed display distance for rapid focus on specific information, while the movable screen provides variable display distance for comfortable viewing of dynamic information. Each region is optimized for its specific function.
3Adaptability or versatility
If multiple screens are used to display different images, then diverse information can be presented, but the device structure becomes complex
Solution Approach 1:
Both the fixed screen and movable screen share the same optical path and scanning system, allowing a single light source and scanner to serve multiple functions. The movable screen can move along the optical axis to provide variable display distance, while the fixed screen remains stationary. This multi-functional design achieves diverse image display capabilities without proportionally increasing system 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
Enables swift focus and prompt information retrieval for drivers by maintaining a virtual image with a fixed display distance while allowing variable display distances for other images, enhancing driving convenience and safety.
Implementation Method 1
a light source that emits light
Implementation Method 2
The scanner scans the fixed screen and the movable screen with the light emitted from the light source
Data Source
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AI summary
A display device displays a virtual image of a first picture and a virtual image of a second picture by using a display medium. This display device includes a light source that emits light, a fixed screen, a movable screen, a driver, and a scanner. The fixed screen is fixedly disposed on an optical path between the light source and the display medium. The movable screen is also disposed on this optical path. The driver moves the movable screen along the optical path. The scanner scans the fixed screen and the movable screen with the light emitted from the light source, thereby forming the first picture on the fixed screen and the second picture on the movable screen.