Vehicle Projection Apparatus Using Segmented Sub-Units for Compact HUD
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Solution Overview
Problem
Head-up display devices in vehicles face challenges with large reflectors due to limited space, leading to driver fatigue and increased production costs, as they require a large diameter to ensure optimal viewing angles for drivers, which is difficult to manufacture and reduces the utilization of vehicle space.
Innovation Solution
A projection apparatus comprising a region selection module, image calibration module, and projection module that selects and calibrates projective regions based on depth images, allowing for the projection of images onto specific areas, thereby optimizing the viewing experience without the need for a large reflector, using components like TOF cameras and structured light cameras for depth information and MEMS-based projectors for clear image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large diameter reflector is used to ensure optimal viewing angles for drivers, then the viewing experience is improved, but the device volume increases and manufacturing difficulty increases
Solution Approach 1:
The patent divides the projection system into multiple sub-projection units (first sub-projection unit and second sub-projection unit) that can be arranged in a compact configuration. Each sub-unit projects to a specific region, allowing the overall system to achieve wide viewing coverage without requiring a single large reflector, thus reducing device volume while maintaining viewing quality
Solution Approach 2:
The patent utilizes depth dimension by projecting images onto windshields at different distances (2 meters for vehicle state information, 5-8 meters for augmented reality information). This multi-depth projection approach allows optimal viewing angles to be achieved across different viewing distances without increasing the horizontal diameter of the reflector
2Ease of operation
If a large diameter reflector is used to ensure optimal viewing angles for drivers, then the viewing experience is improved, but the manufacturing cost increases
Solution Approach 1:
The projection system is segmented into multiple smaller sub-projection units rather than using one large reflector. These smaller units are easier to manufacture with standard precision requirements, reducing manufacturing difficulty and cost while still achieving the desired overall viewing performance through their combined operation
Solution Approach 2:
The patent employs multiple smaller, simpler projection components that can be manufactured more economically than a single large precision reflector. These smaller units can be produced using more accessible manufacturing processes, lowering the overall system cost while maintaining functional effectiveness
3Area of stationary object
If a large diameter reflector is used to ensure optimal viewing angles, then the viewing coverage is improved, but the space utilization in vehicle decreases
Solution Approach 1:
The viewing coverage is achieved through multiple sub-projection units arranged in a compact configuration, each covering a specific angular range. This segmented approach provides wide overall viewing coverage while keeping each individual component small, thus improving space utilization in the vehicle compared to a single large reflector
Solution Approach 2:
The system expands coverage in the depth dimension by projecting to multiple focal distances (near field at 2 meters for vehicle information, far field at 5-8 meters for augmented reality). This multi-depth approach increases effective viewing coverage without requiring proportional increases in horizontal space, improving vehicle space utilization
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
This solution enhances the viewing experience by allowing for a larger viewing window without increasing the device's volume, reduces driver fatigue, and lowers production costs by eliminating the need for large reflectors, while maintaining clear and focused image projection across various depths.
Implementation Method 1
the image acquisition part includes a TOF camera or a structured light camera; the image acquisition part includes at least one group of infrared emitter and infrared receiver; the infrared emitter emits infrared light towards the viewfinder coverage; and the infrared receiver receives the infrared light which returns and obtains the depth image
Implementation Method 2
the image acquisition part includes at least one group of infrared emitter and infrared receiver; the infrared emitter emits infrared light towards the viewfinder coverage; and the infrared receiver receives the infrared light which returns
Implementation Method 3
the projection part is configured to project the calibrated image to be displayed onto the projective region
Data Source
AI summary
Embodiments of the present disclosure relate to a projection apparatus, a projection system and a projection method. The projection apparatus includes a region selection part, an image calibration part and a projection part. The image calibration part is respectively connected with the region selection part and the projection part. The region selection part is configured to select at least one projective region and send position information of the projective region to the image calibration part, the image calibration part is configured to acquire a relative positional relationship between the projective region and the projection part and calibrate an image to be displayed according to the relative positional relationship, and the projection part is configured to project the calibrated image to be displayed onto the projective region.