In-vehicle Camera Ridge Line Lens Design
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Solution Overview
Problem
In-vehicle cameras face reflection issues due to varying windshield inclination angles, which complicates installation and increases manufacturing costs, as existing solutions require a long hood to prevent reflection and different camera designs for different vehicle types.
Innovation Solution
An in-vehicle camera with a case and lens design featuring a top face with a bent angular shape and a ridge line, where the lens is positioned near the ridge line, allowing for closer proximity to the windshield regardless of inclination, and eliminating the need for a long hood, enabling installation in narrow spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a long hood is attached to the lower side of the lens to prevent reflection, then reflection is prevented, but it becomes difficult to install the in-vehicle camera in a narrow space
Solution Approach 1:
The patent changes the spatial arrangement by moving the lens from a recessed position to an exposed position on the top face of the case. This dimensional change eliminates the need for a long hood extension while maintaining reflection prevention through the angular shape of the top face that directs reflected light away from the lens.
2Ease of manufacture
If the in-vehicle camera is designed with a fixed inclination angle to match a specific windshield, then manufacturing is simplified, but it cannot adapt to different vehicle types with varying windshield angles
Solution Approach 1:
The patent creates a universal camera design where the top face has a specific angular shape that can adapt to different windshield inclination angles. The lens is exposed on the top face and positioned to receive light from various angles, allowing a single camera design to be installed in multiple vehicle types without requiring angle-specific customization.
Solution Approach 2:
The patent changes the geometric parameters of the case top face to an angular shape with specific inclination angles that can accommodate varying windshield angles. By designing the top face with appropriate angular characteristics, the camera can maintain proper optical alignment across different installation scenarios without changing the fundamental camera structure.
3Strength
If the lens is recessed in the case to protect it, then the lens is protected, but light from the lower side reflects off the windshield and enters the lens
Solution Approach 1:
The patent extracts the lens from the recessed position and places it in an exposed position on the top face of the case. This extraction eliminates the reflection problem caused by the recessed structure while the angular shape of the top face provides protection by directing reflected light away from the lens path.
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 effectively across different windshield angles, reduces manufacturing complexity and costs by allowing a single camera design to fit various vehicles, and ensures the lens remains close to the windshield, enhancing installation flexibility.
Implementation Method 1
a phenomenon is caused in which light L coming from the lower side is reflected off the windshield 101 and enters the lens 205 (reflection)
Data Source
AI summary
An in-vehicle camera is provide which has a case and a lens, and which is attached in a vehicle interior so that the lens is exposed at a top face of the case and the top face is opposed to a windshield or another window. The top face has an angular shape bent at a ridge line passing through the top face. The lens is positioned in the vicinity of the ridge line. The in-vehicle camera includes a hood attached to a front portion of the case, the front portion being positioned at a front side of the case with respect to the lens.