Replication Tooling for Holographic HUD Film Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current holographic film replication technologies face challenges in aligning images for drivers of varying heights in head-up displays (HUDs) due to reflective surfaces in windshields, and the lamination process often results in distortions and deviations in the HUD image, limiting the size of the projected image and causing visibility issues.
Innovation Solution
A replication tool with a base structure that includes a channel to stabilize and align laminated glazing and a master holographic film assembly, using a reactive light to record a photopolymer film, and applying a vacuum to deair the space between the layers, while maintaining a consistent distance to minimize distortions and deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wedge-shaped interlayer is used to align images, then image alignment is improved for a particular driver height, but adaptability to drivers of varying heights deteriorates
Solution Approach 1:
The patent replaces the static wedge-shaped interlayer with a dynamic solution using a holographic film that can be precisely positioned and adjusted. The replication tooling enables accurate placement of the holographic film at specific distances from the windshield, allowing image alignment to be optimized for multiple driver heights rather than being fixed for a single height.
2Adaptability or versatility
If a holographic film is laminated in the glazing, then HUD functionality is achieved, but manufacturing precision deteriorates due to short range deviations of the reflecting film surface
Solution Approach 1:
The patent applies preliminary action by using a replication tooling system that pre-establishes precise alignment and spacing between the holographic film and windshield before the lamination process. The tooling includes alignment features and spacing mechanisms that ensure the film is positioned accurately during replication, preventing surface deviations that would otherwise occur during subsequent handling and installation.
3Ease of manufacture
If a flat replication process is used, then manufacturing ease is improved, but manufacturing precision deteriorates due to visible deviations in the HUD image
Solution Approach 1:
The patent introduces an intermediary replication tooling system that mediates between the simple flat replication process and the requirement for high manufacturing precision. The tooling includes precision alignment features, spacing mechanisms, and registration systems that maintain accurate positioning throughout the replication process, enabling high precision to be achieved without complicating the fundamental replication method.
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 tool ensures accurate alignment and minimizes distortions in the holographic film, allowing for larger HUD images and improved image clarity by stabilizing the replication process and maintaining the nominal form of the film during lamination, addressing the limitations of existing technologies.
Implementation Method 1
the base structure may include a port for attachment to a vacuum, which may be used to deair a space between the laminated glazing and master holographic film assembly closely assembled
Implementation Method 2
Replication may include applying a reactive light to a photopolymer film within the laminated glazing through the master holographic film assembly
Data Source
AI summary
A replication tool for use in preparing a holographic film by replication, comprising a base structure having a structure body and a channel configured to receive at least one of a laminated glazing and a master holographic film assembly.