Laminated Glass Sensor Area Reflection Control
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Solution Overview
Problem
Laminated glass films with infrared shielding capabilities can negatively impact sensors by reducing visible light transmittance, leading to noise and decreased performance in information-acquisition areas, especially when notched to avoid this issue.
Innovation Solution
A laminated glass design with a first and second glass plate, an intermediate film, and a film extending over a shielding layer, where the film is positioned to ensure visible light reflection or diffuse reflection of 8% or more, and a retreat distance of 1 mm or more between the film and the shielding layer's edge, creating an information-acquisition area that minimizes noise for sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a film with infrared shielding capability is laminated in the laminated glass, then infrared shielding performance is improved, but visible light transmittance is reduced causing noise in sensors
Solution Approach 1:
The windshield is divided into multiple functional areas: a first area with the infrared shielding film for thermal protection, and a second area (information-acquisition-area) without the film for optimal sensor performance. This spatial segmentation allows each zone to fulfill its specific function without interfering with the other.
Solution Approach 2:
The infrared shielding film is selectively applied only to specific regions of the windshield where infrared protection is needed, while leaving the information-acquisition-area free of the film. This local quality approach ensures that the film's infrared-blocking properties are utilized where necessary without compromising sensor areas.
2Illumination intensity
If a reflection film is laminated to improve HUD performance, then visible light reflection is increased, but reflected light enters the sensor causing noise
Solution Approach 1:
The windshield is segmented into a HUD display area where reflection films are applied for optimal head-up display performance, and an information-acquisition-area where no reflection film is present to prevent noise. This segmentation allows both HUD and sensor functions to operate at peak performance.
Solution Approach 2:
Reflection films with specific optical properties are applied locally to the HUD area of the windshield, while the information-acquisition-area maintains different local quality characteristics (no reflection film) to ensure clean sensor signals. Each region has optimized properties for its specific function.
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 design enhances the performance of sensors by preventing noise light from entering, thereby improving the acquisition of information in the information-acquisition area while maintaining desirable HUD performance.
Implementation Method 1
a portion of the laminated glass in which the film is disposed and the first shielding layer is not disposed has a visible light reflection of 8% or more
Implementation Method 2
a portion of the laminated glass in which the film is disposed and the first shielding layer is not disposed has a visible light reflection of 8% or more, or a diffuse reflection of 9% or more
Data Source
AI summary
A laminated glass includes a first glass plate on a vehicle exterior side, a second glass plate on a vehicle interior side, an intermediate film disposed between the first and second glass plates, a first shielding layer disposed in a peripheral section on an interior surface of the second glass plate, a film disposed between the first and second glass plates, the film extending, in a plan view, in a region overlapping the first shielding layer, and an information-acquisition-area positioned within an opening provided through the first shielding layer and the film, the information-acquisition-area allowing a sensor to obtain information, and wherein a portion of the laminated glass in which the film is disposed and the first shielding layer is not disposed has a visible light reflection of 8% or more, or a diffuse reflection of 9% or more.