Dashboard Polarization Layer for Vehicle Glare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Veiling glare in vehicles, caused by light reflecting off the dashboard and back onto the windshield, is not effectively addressed by existing solutions, particularly those involving polarizing layers on windshields, which reduce light transmission below safety standards.
Innovation Solution
A veiling glare reduction system that uses a polarization layer on the vehicle interior surface, such as the dashboard, to polarize light reflected from the interior, ensuring it is not reflected by the windshield, thereby avoiding the need for additional polarizing layers on the windshield and maintaining sufficient light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarization layer is placed on the windshield to polarize light transmitted through the windshield, then veiling glare is reduced, but visible light transmission is reduced to approximately one-half the original transmission level
Solution Approach 1:
Instead of placing the polarization layer on the windshield (exterior surface), the invention places it on the dashboard interior surface. This reverses the conventional approach and allows the polarization to occur after light reflects from the dashboard, not before it passes through the windshield. The result is that veiling glare is reduced while maintaining full visible light transmission through the windshield.
Solution Approach 2:
The invention uses the dashboard interior surface as an intermediary element to apply the polarization layer. Rather than directly polarizing light at the windshield, the polarization layer is applied to the dashboard surface that reflects the light, making the dashboard the mediator in the glare reduction process while preserving windshield transparency.
2Object-affected harmful factors
If a polarization layer is placed on the windshield, then veiling glare is reduced, but the effective polarization reduces light transmission below federal safety requirements
Solution Approach 1:
The invention inverts the location of the polarization layer from the windshield to the dashboard interior surface. This reversal ensures that the windshield itself remains unpolarized and maintains its full light transmission properties, thereby complying with federal safety requirements while still achieving glare reduction through polarization of the reflected light from the dashboard.
Solution Approach 2:
The dashboard interior surface serves as an intermediary that carries the polarization function away from the windshield. This allows the windshield to remain compliant with light transmission standards while the dashboard acts as the mediating element that polarizes reflected light to reduce glare.
3Object-affected harmful factors
If dark colors and textured surfaces are used on the dashboard to compensate for veiling glare, then glare is reduced, but design options are limited and heat absorption increases
Solution Approach 1:
The invention replaces the mechanical/design-based approach (using dark colors and textured surfaces) with an optical approach (polarization layer). This substitution allows the dashboard to maintain its original design, color, and texture while the polarization layer optically reduces glare, thereby preserving design versatility and aesthetic options.
Solution Approach 2:
The invention changes the parameter of light reflection by applying a polarization layer, rather than changing the physical parameters of the dashboard (color, texture). This parameter change in the optical properties of reflected light allows the dashboard to maintain its original design characteristics while still achieving glare reduction.
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 solution minimizes veiling glare while maintaining the required 70% visible light transmission, allowing improved visual acuity and reducing heat buildup in the vehicle, as it allows for lighter dashboard colors and reduces the volatilization of organic constituents.
Implementation Method 1
a polarization layer disposed on the vehicle interior surface and adapted to polarize the light reflected by the vehicle interior surface
Implementation Method 2
light reflected from a dashboard that reflects off a windshield
Data Source
AI summary
A vehicle glare reduction system is provided, which improves the visual acuity of the vehicle operator in vehicles having a light-colored dashboard. The system includes a dashboard having an upper surface from which dashboard light is reflected; a windshield having an inner and outer surface, the windshield surface configured to reflect the dashboard reflected light; and a polarization layer disposed on the dashboard upper surface, adapted to polarize the dashboard reflected light, wherein the polarized light is not reflected by the windshield inner surface.