Windshield Display Screen Lamination for Double-Image-Free HUD Reflection
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Solution Overview
Problem
Existing panoramic head-up display systems face challenges in optimizing the reflection of display images on windshields without incurring significant additional production effort, as the optical properties of windshields are typically uniform across the entire surface, making it difficult to achieve a double-image-free reflection.
Innovation Solution
A display screen with a reflection layer is attached to or in front of the windshield, specifically designed to reflect the display image efficiently, using a 2D lamination process with multiple thin layers to minimize double images, and can be easily applied or attached without altering the conventional windshield, featuring a black layer for opacity and a heating layer to prevent condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the optical properties of the windshield are modified to optimize reflection of the display image, then the reflection quality improves, but the production complexity and cost increase due to requiring separate processing areas
Solution Approach 1:
The windshield is divided into a first area (display area) and a second area (remaining area) with different optical properties. The first area is designed to reflect display images while the second area maintains standard optical properties, allowing optimized reflection without modifying the entire windshield structure.
Solution Approach 2:
The optical properties are made non-uniform by providing different properties in different areas. The first area has optical properties optimized for reflecting display images, while the second area retains conventional properties, enabling localized optimization without affecting the whole windshield.
2Adaptability or versatility
If a transparent plate is installed on the windshield to reflect projected images, then the display functionality improves, but the mechanical complexity and installation effort increase
Solution Approach 1:
The display screen is integrated directly into the windshield structure, merging the display functionality with the existing windshield. This eliminates the need for separate transparent plates and their associated mounting mechanisms, reducing mechanical complexity while maintaining display adaptability.
Solution Approach 2:
The windshield is designed to serve multiple functions: it acts as both the structural protective element and the display surface. By incorporating the display screen into the windshield, the system achieves multi-functionality without adding separate mechanical components.
3Manufacturing precision
If multiple thin layers are used in the display screen to minimize double images, then the image quality improves, but the manufacturing process becomes more complex
Solution Approach 1:
The display screen is constructed with multiple thin layers, each serving specific optical functions. This segmentation allows precise control over light reflection and refraction, minimizing double images while maintaining manufacturability through standardized lamination processes.
Solution Approach 2:
The display screen uses a composite structure of multiple thin layers with different optical properties. This composite material approach enables precise optical control for high image quality while utilizing established manufacturing techniques for assembling multiple layers.
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
Enables optimal perception of the display image with minimal additional production effort, providing a double-image-free reflection that integrates harmoniously with the windshield, while being reusable and adaptable to various windshield geometries.
Implementation Method 1
the display system has a reflection layer to be arranged in front of or at a lower area of the windshield, in order to reflect a display image in a display area
Implementation Method 2
The heating layer has carbon fibers which can be electrically energized to generate thermal energy in the heating layer
Data Source
AI summary
A display screen for a reflection display system in a motor vehicle has, for arrangement in front of or on a lower region of the windshield, a reflection layer, in order to reflect a display image in a display region without a double image.