Curved Laminated Glass Coating Layout for Distortion-Free Transmission
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Solution Overview
Problem
Perspective distortion occurs in the information transmission and reception area of laminated glass due to differences in emissivity between the glass plate and the coating film, especially when the glass is bent, which deteriorates optical quality.
Innovation Solution
A laminated glass design with a curved first and second glass plate and an intermediate film, incorporating a coating film on the second surface and a shielding layer closer to the first surface, with a specific overlap configuration and distance relation between opening portions to minimize emissivity differences, ensuring d ≥ 3.5×de+1 and d ≤ 10, where de is the emissivity difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a coating film is provided on the laminated glass to reflect P-polarized light, then the brightness of the picture is improved and visibility is ensured, but perspective distortion occurs in the information transmission and reception area due to emissivity differences between the glass plate and coating film
Solution Approach 1:
The patent applies different treatments to different regions of the coating film. Specifically, the coating film has a first region (with opening portions) in the information transmission and reception area where the coating is removed or thinned, and a second region where the coating film remains intact to reflect P-polarized light. This local differentiation allows the system to maintain picture brightness in most areas while eliminating perspective distortion in the critical information transmission area.
Solution Approach 2:
The coating film is segmented into multiple functional regions: a first region with opening portions for information transmission and reception, and a second region for P-polarized light reflection. The shielding layer is also segmented with opening portions positioned to align with the first region. This segmentation allows simultaneous achievement of picture brightness enhancement and optical quality maintenance in different areas.
2Manufacturing precision
If the coating film is removed from the information transmission and reception area, then perspective distortion is reduced, but the brightness enhancement effect is lost in that area
Solution Approach 1:
Instead of completely removing the coating film, the patent creates a localized structure where opening portions are formed in the first region while maintaining the coating film in the second region. This allows the information transmission area to have reduced perspective distortion while the surrounding areas maintain brightness enhancement, achieving local optimization without sacrificing overall performance.
3Manufacturing precision
If a shielding layer is added closer to the first surface than the coating film, then perspective distortion is reduced through proper positioning, but the device complexity increases
Solution Approach 1:
The shielding layer is integrated into the existing laminated glass structure by positioning it between the first glass plate and the coating film, combining multiple functions (shielding, structural support, and optical quality control) into a single integrated component rather than adding separate independent elements.
Solution Approach 2:
The shielding layer acts as an intermediary element between the first glass plate and the coating film, mediating the optical interactions and reducing perspective distortion by its strategic positioning. This intermediary structure enables the system to achieve both brightness enhancement and optical quality without requiring complete redesign of the existing architecture.
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
Reduces perspective distortion in the information transmission and reception area, maintaining high optical quality even with a coating film that reflects P-polarized light.
Implementation Method 1
a coating film that reflects P-polarized light
Implementation Method 2
an intermediate film located between the first glass plate and the second glass plate to bond the first glass plate and the second glass plate
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
Provided is a laminated glass including: a curved first glass plate, a curved second glass plate, and an intermediate film located between the first glass plate and the second glass plate to bond the first glass plate and the second glass plate, the first glass plate including a third surface and a fourth surface, and the second glass plate includes a first surface and a second surface, the fourth surface being a surface of the first glass plate located on a side opposite to the intermediate film, the third surface being a surface of the first glass plate facing the intermediate film, the second surface being a surface of the second glass plate facing the intermediate film, the first surface being a surface of the second glass plate located on a side opposite to the intermediate film, the laminated glass having: a coating film provided on the second surface, the third surface, or the fourth surface; a shielding layer provided closer to the first surface than the coating film; and an information transmission and reception area that is a region in which a first opening portion provided on the shielding layer and a second opening portion provided on the coating film overlap each other in a case where seen in a plan view, the coating film having a visible light reflectance of 10% or more in a case where visible light of P-polarized light enters at an incidence angle of 65 deg, in a case where seen in a plan view, a first end surface of the shielding layer that defines the first opening portion being located inside a second end surface of the coating film that defines the second opening portion, and in a case where seen in a plan view, the shortest distance d [mm] between the first end surface and the second end surface satisfying the following Equation (1): d ≥ 3.5×de+1, d ≤ 10 ... (1), here, de is an absolute value of a difference between an emissivity of the coating film and an emissivity of a single unit of a glass plate, on which the coating film is provided, in the first glass plate and the second glass plate.