HUD Windshield PVB Lamination for Double Image Compensation
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Solution Overview
Problem
The high cost of wedge-shaped PVB sheets used in HUD compatible windshields, due to their expensive manufacturing process, poses a significant challenge in producing cost-effective windshields.
Innovation Solution
A method for producing HUD compatible windshields by assembling a wedge-shaped PVB sheet portion with a plane PVB sheet portion, where the plane PVB sheet is assembled above the wedge-shaped PVB sheet, reducing the need for cutting or layering, and resulting in a simpler and less costly manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a wedge-shaped PVB sheet is used to compensate double images in HUD windshields, then the image quality is improved, but the manufacturing cost increases significantly
Solution Approach 1:
The windshield is divided into two functional zones: a first zone with a wedge-shaped PVB sheet for HUD image compensation and a second zone with a plane PVB sheet for cost-effective manufacturing. This segmentation allows the expensive wedge-shaped portion to be limited only to where it is technically necessary for compensating double images in the HUD viewing field
Solution Approach 2:
Different PVB sheet configurations are applied to different regions of the windshield based on local requirements. The wedge-shaped PVB sheet with specific wedge angle is applied locally in the first zone where HUD functionality is needed, while the plane PVB sheet is used in the second zone where cost reduction is prioritized without compromising overall windshield performance
2Manufacturing precision
If a wedge-shaped PVB sheet is used throughout the entire windshield, then double image compensation is achieved, but the manufacturing complexity increases
Solution Approach 1:
The windshield structure is segmented into two distinct zones with different PVB sheet configurations. The first zone contains the wedge-shaped PVB sheet for image compensation, while the second zone uses a simpler plane PVB sheet, thereby reducing overall manufacturing complexity while maintaining necessary optical functionality
Solution Approach 2:
Instead of making the entire windshield complex with a wedge-shaped PVB sheet throughout, the invention inverts the approach by using a simple plane PVB sheet for most of the windshield and applying the complex wedge-shaped portion only locally where needed, thus simplifying the overall manufacturing process
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 method reduces the manufacturing cost of HUD compatible windshields by eliminating the need for complex cutting or layering processes, while maintaining the necessary wedge angle for image compensation, thus providing an optimal and cost-effective solution.
Implementation Method 1
compensating the double images occurring in reflection at outside and inside surfaces of the windshield
Data Source
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AI summary
The present invention concerns a method for producing a HUD compatible windshield (2) comprising a HUD viewing field (22) provided by an area of a portion of a wedge shaped PVB sheet (21) with an appropriate wedge angle (1) for compensating the double images occurring in reflection at outside and inside surfaces (9,8) of the windshield (2), wherein the method comprises the following steps: - providing said wedge shaped PVB sheet portion (21); - providing a portion of a plane PVB sheet (23); - assembling said two respective portions (21,23) of the wedge shaped and plane PVB sheets together; and - forming the windshield (2), According to the present invention, the portion of the plane PVB sheet (23) is assembled to the portion of the wedge shaped PVB sheet (21) above the latter, in order to be in the upper part (33) of the windshield (2).