Vehicle Window Camera Lens Mounting for Reflection Prevention
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Solution Overview
Problem
Conventional methods for preventing reflections on vehicle windshields require a position adjusting mechanism for lens hoods and cameras, leading to increased lens hood size and windshield inclination.
Innovation Solution
An imaging system with a camera lens attaching portion on the vehicle window, where the camera's optical axis is orthogonal to the lens attaching surface, allowing the camera to image outside the vehicle through a specially designed opening in the window, which can be inclined or have a polygonal shape, with a light shielding portion and wiper integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a lens hood is provided to prevent reflection of objects in the vehicle on the windshield, then reflection prevention is improved, but the lens hood size increases and the windshield must be inclined
Solution Approach 1:
The patent extracts the light-blocking function from the traditional lens hood structure and relocates it to a light-blocking plate positioned behind the camera. This separates the reflection prevention function from the front-facing lens hood, allowing the lens hood to be minimized or eliminated while maintaining effective reflection prevention through the rear-positioned light-blocking plate.
Solution Approach 2:
The patent introduces a light-blocking plate as an intermediary element positioned between the camera and the vehicle interior. This plate serves as a mediator that blocks reflected light from reaching the camera lens, preventing reflections in the captured images without requiring a large front lens hood or windshield inclination.
2Object-affected harmful factors
If the lens hood and camera are moved in the front-back direction to prevent reflection, then reflection prevention is improved, but a position adjusting mechanism is required
Solution Approach 1:
The patent performs preliminary action by pre-positioning the light-blocking plate at an optimal location behind the camera during the design phase. This fixed pre-positioned structure eliminates the need for dynamic position adjustment mechanisms, as the reflection prevention geometry is established beforehand through the careful placement of the light-blocking plate relative to the camera and windshield.
3Object-affected harmful factors
If the windshield is inclined to prevent reflection, then reflection prevention is improved, but the camera mounting becomes more complex
Solution Approach 1:
The patent applies local quality by creating a localized light-blocking environment around the camera using the light-blocking plate, rather than requiring global windshield inclination. This allows the windshield to maintain its standard inclination for driver visibility while the camera area has dedicated light blocking, achieving reflection prevention without compromising mounting simplicity or driver view.
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 reflection of internal images on the vehicle window while maintaining a compact design and avoiding interference with the driver's view, enabling clear imaging of the outside environment.
Implementation Method 1
A light shielding portion may be provided on a surface of the camera lens attaching portion other than a camera lens attaching surface and the window surface
Data Source
AI summary
A camera lens attaching portion 30 is fitted into an opening provided in a vehicle window 20. A lens of a camera 40 is attached to a lens attaching surface 31a of the camera lens attaching portion 30. A surface opposed to the lens attaching surface 31a is a window surface 31b. The window surface 31b is an inclined surface different from a window surface 22 of the vehicle window 20. Furthermore, the window surface 31b may be an inclined surface same as the window surface 22 of the vehicle window 20. The camera 40 images outside of the vehicle through the camera lens attaching portion 30 with an angle of view set within the window surface 31b of the camera lens attaching portion 30. It is possible to prevent reflection of a reflected image generated on a vehicle inner side of the vehicle window.