Windscreen HUD Laminated Glass Localized Luminescent Particles
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Solution Overview
Problem
Existing head-up displays in vehicles face challenges with visibility due to external light and weather conditions, require large amounts of expensive luminescent particles, and do not meet aesthetic requirements, leading to potential accidents and increased costs.
Innovation Solution
A laminated glass windshield with a composite pane comprising a first and second pane separated by a thermoplastic intermediate layer containing luminescent particles, where the particles are homogeneously distributed in a limited area for efficient HUD functionality, reducing particle usage and maintaining aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If luminescent particles are distributed throughout the entire windshield, then HUD functionality is achieved, but the cost increases due to large quantities of expensive particles
Solution Approach 1:
The patent applies local quality by distributing luminescent particles only in specific zones of the windshield: a first zone with higher particle density for displaying alphanumeric characters and a second zone with lower particle density for graphical elements. This localized distribution achieves the required HUD functionality while significantly reducing the total quantity of expensive luminescent particles compared to uniform distribution across the entire windshield.
2Reliability
If luminescent particles are distributed throughout the entire windshield, then HUD functionality is achieved, but the aesthetic appearance deteriorates due to particles in the entire field of view
Solution Approach 1:
The patent applies local quality by distributing luminescent particles only in specific zones of the windshield: a first zone with higher particle density for displaying alphanumeric characters and a second zone with lower particle density for graphical elements. This localized distribution achieves the required HUD functionality while significantly reducing the total quantity of expensive luminescent particles compared to uniform distribution across the entire windshield.
3Ease of operation
If classic HUD projection is used, then information is displayed, but visibility deteriorates under strong sunlight and reflection conditions
Solution Approach 1:
The patent employs color changes by utilizing luminescent particles that emit light at specific wavelengths when excited by the HUD projector. These particles convert the projected light into visible luminescence that maintains high contrast and visibility even under strong sunlight conditions, effectively overcoming the visibility problems of classic HUD projections through wavelength transformation and enhanced brightness.
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 solution enhances visibility by reducing the need for expensive particles, improves manufacturing ease, and maintains the windshield's aesthetic appearance while providing effective HUD functionality without disturbing reflections, thus enhancing road safety and reducing costs.
Implementation Method 1
The intermediate layer comprises or consists of at least one first thermoplastic film. The first thermoplastic film contains luminescent particles. Luminescent particles, as defined in the invention, contain organic and/or inorganic chromophoric or luminescent compounds, ions, aggregates, and/or molecules. Luminescence involves fluorescence and/or phosphorescence processes, and therefore excitation with electromagnetic radiation and the emission of electromagnetic radiation.
Data Source
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AI summary
Windshield for head-up displays in vehicles at least comprising: a. a laminated pane (5) comprising a first pane (1) and a second pane (2) and an intermediate layer (3) arranged between the first pane (1) and the second pane (2), wherein b. the intermediate layer (3) comprises a first thermoplastic film (3a), wherein c. the first thermoplastic film (3a) comprises a luminous zone (6) having 2 g/m2 to 5 g/m2 of luminescent particles (4) and contains a further region (6b) without luminescent particles (4).