Light Control Compensation for Curved Windshield Display Distortion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display systems with curved optical components, such as vehicle windshields, suffer from lensing effects that distort display light and affect the pitch of replicas, leading to issues like ghosting and reduced viewing experience, requiring costly and time-consuming fine-tuning of physical lenses for each vehicle model.
Innovation Solution
A hybrid software-hardware approach using a light control device with partial compensation for the curvature of the optical component, combined with software fine-tuning, to minimize distortion and maintain consistent system performance across various curved optical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a curved optical component is used to redirect display light, then the display system can achieve compact design and improved light redirection, but the curvature introduces lensing effects that distort display light and affect replica pitch
Solution Approach 1:
The patent applies preliminary action by pre-compensating for the curved optical component's lensing effects through software processing of the hologram data before the light reaches the curved surface. The system calculates and applies compensation factors that counteract the expected distortion, ensuring accurate replica positioning even though the physical curvature cannot be changed.
Solution Approach 2:
The patent replaces mechanical lens adjustment with software-based optical compensation. Instead of physically adjusting lenses or masks to correct curvature effects, the system uses computational methods to calculate and apply compensation factors to the hologram data, substituting mechanical precision requirements with software processing.
2Manufacturing precision
If physical lenses are fine-tuned for each vehicle model, then optimal optical performance can be achieved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent implements universality by creating a single, adaptable optical system that can accommodate multiple vehicle models with different curved optical components. The software compensation system is designed to work with various curvature profiles without requiring physical reconfiguration, allowing one display system to serve multiple applications across different vehicle types.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting software compensation factors based on the specific curvature characteristics of different optical components. The system measures or specifies the curvature parameters of the optical component and automatically calculates the appropriate compensation factors, allowing the same hardware to adapt to different vehicle models through parameter adjustment rather than physical modification.
3Adaptability or versatility
If the curvature of the optical component is non-linear, then complex distortions are introduced, but correcting these requires complex physical lens adjustments
Solution Approach 1:
The patent replaces complex mechanical lens adjustment systems with software-based computational compensation. The non-linear distortion caused by complex curvature profiles is addressed through software algorithms that calculate and apply compensation factors to the hologram data, eliminating the need for complex physical lens assemblies while maintaining the ability to handle non-linear optical distortions.
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 approach reduces manufacturing complexity and cost by allowing a single system to fit multiple vehicle models, while improving image quality and reducing ghosting effects by optimizing replica spacing and symmetry.
Implementation Method 1
A computer-generated hologram may be encoded on a spatial light modulator arranged to modulate the amplitude and/or phase of incident light
Implementation Method 2
This amplitude and phase information can be captured on, for example, a photosensitive plate by well-known interference techniques to form a holographic recording
Implementation Method 3
Light modulation may be achieved using electrically-addressable liquid crystals, optically-addressable liquid crystals or micro-mirrors
Data Source
AI summary
A display system comprises a replicator arranged to receive spatially modulated light and replicate the spatially modulated light to form a plurality of replicas of the spatially modulated light by waveguiding between a reflective surface and a transmissive-reflective surface. The display system further comprises a light control device located in the optical path of the plurality of replicas of the spatially modulated light downstream from the output surface of the replicator. The light control device is arranged to provide a first compensation for the curvature of a curved optical component downstream from the light control device. The first compensation is a function of the position on the output surface and is arranged to only partially counteract the curvature of the optical component and retain some distortion from the curvature of the optical component of at least one of the replicas compared to another of the replicas.