Vehicle Window Camera Hood With Low-Gloss Anti-Reflection Surface
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Solution Overview
Problem
Existing vehicle window glass systems with onboard cameras suffer from reflections of rays on the hood member, leading to incorrect detection by the onboard camera due to projected reflected images on the inner side surface.
Innovation Solution
The vehicle window glass system incorporates a hood member with a black appearance having an L value of at most 27.0 and a gloss value of less than 6.0, made of specific resin materials, to prevent reflections on the hood member and subsequent projection onto the inner side surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the hood member is colored in black to prevent ray reflection, then the absorption of light energy is improved, but the glossiness of the surface increases causing reflected images to be projected on the inner side surface of the vehicle window glass
Solution Approach 1:
The patent applies a black color coating to the hood member to absorb light energy and prevent reflection. This directly addresses the contradiction by changing the color property of the surface to maximize light absorption while the matte finish controls the reflection issue.
Solution Approach 2:
The patent changes the surface parameter of the hood member by applying a matte finish with specific gloss value constraints (gloss value of 60° less than 10 degrees). This parameter change transforms the surface from potentially reflective to diffuse, preventing reflected image projection while maintaining light absorption.
2Shape
If the gloss value of the hood member surface is increased to improve appearance, then the aesthetic quality is improved, but reflected rays are projected into the onboard camera causing incorrect detection
Solution Approach 1:
The patent uses a black color coating that provides both aesthetic appearance and functional benefits. The black color with matte finish creates a non-reflective surface that maintains visual appeal while preventing harmful reflections from entering the camera.
Solution Approach 2:
The patent specifies precise parameter constraints: L value of at most 27.0 and gloss value of 60° less than 10 degrees. These parameter changes ensure the surface has appropriate appearance while eliminating reflected image projection that would interfere with camera detection.
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
Prevents rays transmitting through the vehicle window glass from being reflected on the hood member, thereby avoiding incorrect detections by the onboard camera.
Implementation Method 1
the hood member has a surface facing the vehicle window glass and exhibiting a black appearance having an L value of at most 27.0 and is made of a material having a gloss value of less than 6.0... to prevent rays transmitting through the vehicle window glass from being reflected on the hood member
Data Source
AI summary
A vehicle window glass with an onboard camera includes a vehicle window glass configured to be mounted to a vehicle; a bracket fixed to an inner side surface of the vehicle window glass; an onboard camera attached to the bracket; and a hood member disposed on a vehicle forward side of the onboard camera; wherein the hood member has a surface facing the vehicle window glass and exhibiting a black appearance having an L value of at most 27.0 and is made of a material having a gloss value of less than 6.0 measured based on JIS Z 8741-1997.