Head-Up Display Real-Time Aberration Compensation
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Solution Overview
Problem
Existing head-up display systems struggle to accurately compensate for deformations in windshields and mirror elements during vehicle operation, leading to aberrations in the optical beam path that distort or obscure information displayed to the driver.
Innovation Solution
A head-up display device comprising a projection unit, deflection device, sensor, and control system that uses a test beam to detect and correct aberrations in real-time, allowing for continuous compensation of distortions such as distortion, coma, astigmatism, and chromatic aberration, ensuring high image quality and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a static diffusor is used to compensate for windshield distortion, then compensation for specific windshield distortion is achieved, but dynamic compensation during vehicle operation is not possible
Solution Approach 1:
The patent applies dynamics by replacing the static diffusor with a deformable mirror element whose surface can be actively adjusted during vehicle operation. The mirror element's curvature can be dynamically changed to compensate for varying windshield distortions caused by temperature changes, pressure differences, and vibrations during operation, enabling real-time adaptation rather than fixed compensation for a single windshield configuration.
Solution Approach 2:
The patent changes the physical parameter of the mirror element's surface curvature from fixed to variable. By controlling the deformable mirror element through actuators or other adjustment mechanisms, the system can modify the mirror's focal length and surface shape to match different windshield distortion conditions, enabling dynamic compensation across various operating conditions and vehicle configurations.
2Manufacturing precision
If the head-up display is designed for a specific vehicle model with a specific windshield curvature, then optimal image quality is achieved for that model, but the system cannot be used across various vehicle models
Solution Approach 1:
The patent achieves universality by designing a head-up display system with a deformable mirror element that can adapt to different windshield curvatures across various vehicle models. The mirror element can be adjusted to match the specific optical characteristics of different windshields, allowing the same display device to maintain optimal image quality across multiple vehicle platforms rather than requiring model-specific customization.
Solution Approach 2:
The system uses dynamic adjustment of the mirror element's surface geometry to accommodate different vehicle models. By varying the mirror's curvature and focal properties in response to detected windshield characteristics, the display maintains high image quality across diverse vehicle configurations without requiring physical reconfiguration or redesign for each model.
3Reliability
If deformation of the windshield or mirror element occurs during operation, then the optical beam path is affected causing aberrations, but the deformation cannot be compensated for in real-time
Solution Approach 1:
The patent implements feedback by using a sensor to detect the actual position and orientation of the mirror element or windshield deformations during vehicle operation. This detection information is fed back to a control system that adjusts the deformable mirror element in real-time to compensate for the detected deviations, maintaining stable optical beam path and preventing aberrations despite external disturbances like temperature changes or vibrations.
Solution Approach 2:
The system dynamically responds to real-time deformations by continuously adjusting the mirror element's surface geometry. The deformable mirror can change its shape and focal properties on-the-fly to counteract the effects of windshield deformation, ensuring that the optical beam path remains stable and aberration-free throughout vehicle operation rather than being fixed at initial calibration.
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 system effectively compensates for deformations in real-time, improving image quality and ensuring that information is accurately displayed to the driver, regardless of external influences like temperature, pressure, or vibrations, and can be used across various vehicle models.
Implementation Method 1
By means of the detection of the wavefront, the position and the direction of the at least one test beam, it is possible to calculate at least one aberration
Implementation Method 2
Incident light beams are deflected at the deflection device, which comprises at least one deflection element
Implementation Method 3
The light exiting the projection unit P and shown by the black arrow is reflected at a windshield W in the direction of a visibility region V
Data Source
AI summary
The invention relates to a head-up display device for representing information in a field of view of an observer. The head-up display device comprises at least one projection device, a deflection device which comprises at least one deflection element at which incident light beams are deflected, a sensor device, and a control device. The sensor device is used for detecting data of at least one test beam which is incident on the deflection device. The control device is used for determining at least one aberration caused by the deflection device and for determining at least one correction signal in real time.