Laminated Glass Wedge Angle Reduces Reflected Images
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Solution Overview
Problem
Conventional laminated glass with a wedge shape fails to effectively reduce reflected multiple images of triple or more, which causes visibility issues in vehicle windshields with head-up displays.
Innovation Solution
A laminated glass configuration featuring a first and second glass plate with an intermediate film, where high reflection surfaces between the glass plates have wedge angles, specifically with the wedge angle of the glass plates or intermediate film being greater than 0 mrad and less than or equal to 1.0 mrad, to minimize reflected multiple images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-reflection treatment is applied to interfaces between glass plates and intermediate film, then reflected image control is improved, but reflected multiple images of triple or more increase
Solution Approach 1:
The patent changes the critical parameter of wedge angle in the glass plates themselves, rather than relying solely on high-reflection treatments at interfaces. By introducing specific wedge angles (first wedge angle for the first glass plate, second wedge angle for the second glass plate) and controlling the thickness of the intermediate film, the patent modifies the optical path differences to reduce reflected multiple images of triple or more while maintaining reflected image control.
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 configuration significantly reduces the maximum angle of reflected multiple images to within a tolerance level, improving visibility by ensuring that all reflected images are approximately superimposed, addressing the limitations of conventional laminated glass designs.
Implementation Method 1
an intermediate film located between the first glass plate and the second glass plate, and configured to be bonded to the first glass plate and the second glass plate
Implementation Method 2
When a high reflection surface is a surface having an optical reflectance of 1% or more with respect to an incident angle of a visible light from a light source
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3~4
AI summary
A laminated glass includes a first glass plate; a second glass plate; and an intermediate film located between the first glass plate and the second glass plate, and configured to be bonded to the first glass plate and the second glass plate. When a high reflection surface is a surface having an optical reflectance of 1% or more with respect to an incident angle of a visible light from a light source, the laminated glass further includes one or more high reflection surfaces between a reflection surface that is an outer surface of the first glass plate and a reflection surface that is an outer surface of the second glass plate. A portion arranged between the adjacent high reflection surfaces has a wedge angle.