Polarized Head-Up Display Layout for Wider Vehicle Field of View
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Solution Overview
Problem
Existing head-up display systems face challenges in achieving a large field of view due to the difficulty in manufacturing large-aperture reflectors, which leads to a bulky system size and limited viewing capabilities.
Innovation Solution
A head-up display system utilizing a polarization beam splitting element and time division multiplexing method to deflect light at different angles for separate image projections, allowing simultaneous display of multiple images within the human persistence of vision time, thereby enlarging the field of view without increasing the system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a head-up display system is added to a vehicle, then the driver can obtain navigation and other information without taking eyes off the road, but the system requires complex coordination between multiple control units and cameras which increases system complexity
Solution Approach 1:
The system divides functionality into separate control units: a first control unit processes images from the first camera and controls the first projector, while a second control unit processes images from the second camera and controls the second projector. This segmentation allows independent optimization and fault isolation of each display channel.
Solution Approach 2:
The head-up display system acts as an intermediary between the vehicle's information systems and the driver, projecting navigation and vehicle information directly into the driver's field of view through windshields or visors, eliminating the need for the driver to shift attention to other displays.
2Ease of operation
If a head-up display system is added to a vehicle, then the driver can obtain information without taking eyes off the road, but the system requires multiple projectors and cameras which increases device complexity
Solution Approach 1:
The system uses separate projector-camera pairs for different display regions: a first projector displays information in a first region of the windshield/visor, while a second projector displays information in a second region. This segmentation allows independent control and optimization of each display zone.
Solution Approach 2:
The system transitions from traditional 2D display surfaces to a 3D spatial display architecture by projecting information at different positions and orientations on the windshield or visor, creating a multi-dimensional information presentation that adapts to the driver's viewing geometry.
3Adaptability or versatility
If information is displayed at different positions on the windshield or visor, then the driver can view information in different regions, but the system requires multiple projectors which increases device complexity
Solution Approach 1:
The display system is divided into independent modules: a first projector for displaying information in a first region, and a second projector for displaying information in a second region. Each module can be independently controlled, calibrated, and maintained, reducing the impact of complexity.
Solution Approach 2:
The head-up display system is designed to display multiple types of information (navigation, vehicle status, warnings) across multiple regions simultaneously using multiple projectors, making the system universally applicable to various information display needs without requiring separate systems for each function.
Data Source
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AI summary
A head-up display system and display method, a vehicle, and a computer product. The head-up display system comprises: a display control module (1) configured to output, within a first period of time, first linearly polarized light (P) for displaying a first image (51) and to output, within a second period of time, second linearly polarized light (S) for displaying a second image (52); and a polarization light splitting element (3) provided on a light emission path of the display control module (1) and configured to make a propagation direction of the first linearly polarized light (P) deflect at a first angle and make a propagation direction of the second linearly polarized light (S) deflect at a second angle, wherein the first angle is different from the second angle such that an image display area of the head-up display system can be enlarged and thus vision is broadened.