Head-Up Display Diffuser and Segmented Reflector for Wide FOV
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Solution Overview
Problem
The field of view (FOV) of existing head-up displays based on free curved mirrors is limited, making it difficult to display abundant information such as navigation maps and complex safety information, and increasing the FOV through optical design methods leads to issues like insufficient brightness, unstable images, and high power consumption.
Innovation Solution
A display apparatus comprising a projector device, a reflector structure with sub-reflector structures, and a light beam diffuser structure that diffuses light without changing the chief light axis, allowing light to be concentrated in a larger area, thereby increasing the field of view while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If optical design methods are used to increase the FOV, then the field of view is improved, but brightness becomes insufficient and power consumption increases
Solution Approach 1:
The reflector structure is divided into multiple sub-reflector structures (first, second, third sub-reflector structures) with different reflective functions. Each sub-reflector structure reflects light to different regions, enabling the system to achieve a large FOV by segmenting the reflection paths rather than using a single optical element, thereby avoiding the need for high power consumption to illuminate the entire expanded FOV area.
Solution Approach 2:
Different sub-reflector structures are assigned different reflective properties and orientations. The first sub-reflector structure reflects to a first region, the second to a second region, and the third to a third region. This local differentiation of reflective quality allows each zone to be optimized for its specific function, achieving uniform brightness distribution across the entire FOV without requiring excessive overall power consumption.
2Area of moving object
If optical design methods are used to increase the FOV, then the field of view is improved, but image stability deteriorates
Solution Approach 1:
By dividing the reflector into multiple stable sub-reflector structures with fixed reflective angles, the system achieves a large FOV through segmented reflection paths. Each sub-reflector maintains a stable optical path for its designated region, preventing the image instability that would result from using a single complex optical element with large FOV capabilities.
3Area of moving object
If optical design methods are used to increase the FOV, then the field of view is improved, but brightness becomes insufficient
Solution Approach 1:
Each sub-reflector structure is configured with specific reflective properties optimized for its target region. The first sub-reflector structure directs light to the first region, the second to the second region, and the third to the third region, ensuring that each area receives adequate brightness. This local optimization of light distribution maintains high illumination intensity across the entire expanded FOV without requiring a proportional increase in overall power consumption.
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 solution enhances the utilization ratio of light beams, achieving a large field of view with low power consumption, allowing for the display of more information without the drawbacks of brightness and stability issues.
Implementation Method 1
the light beam diffuser structure is configured to diffuse a light beam passing through the light beam diffuser structure without changing chief light of the light beam
Implementation Method 2
the reflector structure comprises a plurality of sub-reflector structures, the plurality of sub-reflector structures are configured to reflect the light emitted from the projector device
Data Source
AI summary
A display apparatus, a head-up display and a motor vehicle are provided. The display apparatus includes a projector device, a reflector structure and a light beam diffuser structure. Light emitted from the projector device passes through the light beam diffuser structure, is reflected by the reflector structure, and then reaches a first predetermined region; the light beam diffuser structure is configured to diffuse a light beam passing through the light beam diffuser structure; the reflector structure is configured to reflect the light emitted from the projector device and the light reflected by the plurality of sub-reflector structures reaches a second predetermined region within the first predetermined region if the light beam diffuser structure is removed from an optical path from the projector device to the first predetermined region, and an area of the second predetermined region is smaller than an area of the first predetermined region.