Offset Lens Camera for Blind Spot Vision

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Solution Overview

Problem

Conventional vehicle vision systems using cameras struggle to provide an effective rearward field of view, particularly in blind spot areas, due to distortion issues and inadequate resolution, which can lead to reduced driver awareness and increased safety risks.

Innovation Solution

A vehicle vision system employing one or more CMOS cameras with a lens offset from the center of the imaging array sensor, utilizing high distortion lenses to enhance resolution in critical areas and adjust displayed images based on driver head and gaze movements, allowing for improved blind spot monitoring and reduced distortion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a conventional camera with centered lens is used, then the imaging array sensor captures a wide field of view, but the resolution and image quality deteriorate in critical blind spot areas due to distortion

Engineering Contradiction:
Improveresolution in blind spot areasVSAvoidlens offset configuration
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies asymmetry by deliberately offsetting the lens from the center of the imaging array sensor. This asymmetric configuration positions the optical center at a specific distance from the sensor center, creating a non-uniform image distribution that concentrates higher resolution and lower distortion in the blind spot monitoring regions while accepting reduced quality in other areas. This resolves the contradiction by sacrificing symmetric balance to achieve superior measurement precision in critical areas.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The patent implements local quality by creating different image qualities at different regions of the sensor array. The offset lens configuration ensures that the blind spot monitoring regions receive higher resolution and lower distortion images, while other regions of the field of view have acceptable but lower quality. This local optimization resolves the contradiction by providing high measurement precision where it is most needed rather than uniformly across the entire field of view.

Inventive Principle:
Principle #3Local quality

2Area of stationary object

If a wide angle lens with high distortion is used to capture blind spot areas, then the field of view is expanded, but the image distortion increases reducing driver awareness

Engineering Contradiction:
Improvefield of view coverageVSAvoidimage distortion
Core Design Contradiction:
Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent uses asymmetric lens offset to strategically manage distortion distribution. By positioning the optical center away from the sensor center, the system accepts higher distortion in non-critical regions while maintaining lower distortion in blind spot areas. This asymmetric approach allows the wide angle lens to provide expanded field of view coverage while controlling distortion in the most important monitoring zones.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The patent applies local quality by allowing different distortion levels in different field of view regions. The offset lens configuration creates a distortion map where blind spot areas experience lower distortion for better measurement precision, while peripheral areas tolerate higher distortion to achieve comprehensive field of view coverage. This resolves the contradiction by optimizing image quality locally rather than globally.

Inventive Principle:
Principle #3Local quality

3Measurement precision

If the lens is offset from the sensor center, then resolution is improved in blind spot regions, but the overall image uniformity and quality across the field of view deteriorates

Engineering Contradiction:
Improveresolution in key areasVSAvoidimage quality uniformity
Core Design Contradiction:
Measurement precisionVSStability of the object's composition

Solution Approach 1:

The patent embraces local quality variations as a solution rather than a problem. The offset lens configuration intentionally creates non-uniform image quality across the sensor array, with enhanced resolution and stability in blind spot monitoring regions and acceptable quality elsewhere. This local optimization strategy resolves the contradiction by prioritizing composition stability in critical areas over global uniformity.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent uses asymmetric lens-sensor positioning to create deliberate quality variations. The offset configuration produces a stable, high-resolution image in the blind spot regions while accepting reduced uniformity across the entire field of view. This asymmetric design resolves the contradiction by making the image composition stable where it matters most for safety monitoring.

Inventive Principle:
Principle #4Asymmetry

4Adaptability or versatility

If conventional rearview mirrors are replaced by cameras, then modern vehicle integration is achieved, but driver awareness and safety are reduced due to inadequate blind spot monitoring

Engineering Contradiction:
Improvevehicle system integrationVSAvoiddriver awareness
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies asymmetry in the camera system design to prioritize blind spot monitoring performance. The offset lens configuration ensures that the most critical monitoring regions receive optimized image quality, thereby maintaining high driver awareness and safety despite the transition from conventional mirrors to camera-based systems. This resolves the contradiction by making the integrated system reliable in critical functions.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The patent implements local quality optimization to ensure that blind spot monitoring regions achieve sufficient image quality for reliable driver awareness. By concentrating optical resources and resolution in these critical areas through lens offset, the system maintains high reliability for safety-critical functions while accepting lower quality in non-critical regions, thus preserving overall system adaptability.

Inventive Principle:
Principle #3Local quality

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

The system provides enhanced resolution and reduced distortion in key areas, enabling better driver visibility of blind spots and rearward fields of view, thereby improving safety and reducing the risk of accidents.

Implementation Method 1

The lens is configured to focus light at the imaging array sensor

Methodology Applied
Scientific EffectLight focusing: Lens

Implementation Method 2

a two dimensional imaging array sensor having a plurality of photosensor elements arranged in rows and columns

Methodology Applied
Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS11572017B2Vehicular vision system
Publication Date: 2023.02.07 MAGNA ELECTRONICS INC
  • US11572017B2 patent drawing
  • US11572017B2 patent drawing
  • US11572017B2 patent drawing

AI summary

A vehicular vision system includes a camera disposed at a side of a body of a vehicle equipped and having a field of view exterior and at least rearward of the vehicle. The camera includes a lens and a two-dimensional imaging array sensor. The lens of the camera has a center axis region and a peripheral region around the center axis region. The center axis of the lens is laterally offset from the center of the array of the imaging array sensor. A video display displays video images derived from image data captured by the camera, the displayed video images having (i) less distortion at displayed image portions representative of a region laterally closer to the side of the body of the vehicle and (ii) greater distortion at displayed image portions representative of a region further laterally outboard from the side of the body of the vehicle.