Rear view monitoring system for motor vehicles

• US 7,057,500 B1
• Filed: 04/23/2004
• Issued: 06/06/2006
• Est. Priority Date: 04/23/2004
• Status: Expired due to Fees

• Current Assignee: Toyota Motor Corporation
• Original Assignee: Gregorio M. Belloso
• Inventors: Belloso, Gregorio M.
• Primary Examiner(s): PHAM, TOAN NGOC
• Application Number:
  US10/830,077
• Time in Patent Office: 774 Days
• Field of Search: 340/435, 340/425.5, 340/436, 340/903, 340/517, 340/521, 340/522, 340/525, 348/148, 701/301
• US Class Current: 340/435
• CPC Class Codes: B60K 2360/21 using cameras
• CPC Class Codes: B60R 1/00 Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
• CPC Class Codes: B60R 1/26 to the rear of the vehicle
• CPC Class Codes: B60R 1/28 with an adjustable field of view
• CPC Class Codes: B60R 2001/1253 with cameras, video cameras or video screens
• CPC Class Codes: B60R 2300/101 using cameras with adjustable capturing direction
• CPC Class Codes: B60R 2300/105 using multiple cameras
• CPC Class Codes: B60R 2300/30 characterised by the type of image processing
• CPC Class Codes: B60R 2300/802 for monitoring and displaying vehicle exterior blind spot views
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A rear view monitoring system for motor vehicles employs three video assemblies, two of which view regions rearwardly at opposite sides of the vehicle, and the third views the region directly rearwardly of the vehicle. Each assembly has an optical lens which gathers light at a particular viewing angle to produce a focused image, and a camera body which converts the image to an electronic signal capable of adjustment and transmission by electrical conductors. The assemblies also have provision for reversing the image to a mirror-image format. The mirror images are of substantially equal magnification and are displayed on screens mounted within the vehicle at positions generally associated with conventional rear view mirrors.

Claims

1. A rear view monitoring system for a motor vehicle having a longitudinal center axis and passenger compartment symmetrically centered upon said axis and bounded by front and rear, left side and right side portions of the vehicle, a front windshield, a roof, and upwardly directed roof-supporting pillars, said monitoring system comprising:

a) first and second rear view side video assemblies installable on opposite sides of the front portion of said vehicle and positioned and configured to produce mirror images of rearward areas contiguous to the left and right sides of the vehicle, respectively,

b) a third video assembly installable upon the rear of said vehicle and configured to produce a mirror image of an area behind said vehicle, and

c) first, second and third monitor screens of substantially rectangular contour located within said compartment and separately interactive with said first, second and third video assemblies, respectively, to provide visually observable pictures corresponding to said mirror images, said first and second screens being positioned adjacent pillars on the same side of the compartment as the associated video assemblies, and said third screen being centered high upon said front windshield said pictures being of substantially equal magnification and wherein the pictures on said first and second screens partially and adjustably overlap the picture on said third screen, the nature of said overlap being such that between 5% and 20% of the picture on said third screen, measured inwardly from the opposite lateral extremities thereof repeats those portions of pictures on said other two screens which are closest to said axis.

2. The monitoring system of claim 1 wherein said video assemblies are comprised of an optical lens capable of gathering light at a particular viewing angle to produce a focused image, a camera body capable of converting said image to an electronic signal amenable to alteration and transmission via electrical conductors, and means for reversing said image to produce a mirror image.

3. The monitoring device of claim 2 wherein said image reversing means is a rearwardly directed mirror positioned in front of said lens which is forwardly directed.

4. The monitoring system of claim 2 wherein said image reversing means is electronic circuitry within said camera body, and said lens is rearwardly directed.

5. The monitoring system of claim 2 wherein said lens is of adjustable zoom construction.

6. The monitoring device of claim 2 wherein said image reversing means is an optical prism positioned in front of said lens which is forwardly directed.

7. The monitoring system of claims 1 wherein the front portion of said vehicle terminates forwardly in a front bumper, and further comprises oppositely paired fenders.

8. The monitoring system of claim 7 wherein said first and second video assemblies are installed at opposite locations within said paired fenders with minimal outward protrusion from said fenders.

9. The monitoring system of claim 8 wherein the locations of said first and second video assemblies are selected such that the requisite viewing angles to properly cover areas contiguous to the sides of the vehicle match the viewing angle of said third video assembly, thereby causing said screens to show pictures of equal magnification.

10. The monitoring system of claim 7 wherein said first and second video assemblies are located at sites between 65% and 80% of the distance measured from said windshield toward said bumper.

11. The monitoring device of claim 10 wherein the viewing angle of said optical lens is between 35 and 46 degrees.

12. The monitoring device of claim 11 wherein no portion of said video assemblies protrudes more than 2 inches outwardly from the vehicle.