Video system for vehicles

Abstract

A video system including a camera engaged with a rotary drive is mounted rearwardly on a vehicle. The camera provides a rectilinear video image. A drive controller includes two switches to control camera rotation to stop at a point in either direction from a neutral field of view aligned with the vehicle to either of a view including vehicle blind spots or a view including a directly lateral image. The video images are displayed on a monitor in the vehicle.

Claims

1. A video system for a vehicle comprising a rotary drive; a video camera engaged with the rotary drive, the camera and rotary drive being mounted rearwardly on the vehicle, the camera providing a video image that is rectilinear; a drive controller including a first switch and a second switch in the vehicle, the first and second switches each being a hand actuated three position rocker switch spring biased to the neutral switch position, the drive controller returning the camera to the neutral camera position with the switch released, the first switch having left of neutral and right of neutral first switch positions, the drive controller defining a neutral camera position directing the video image centered directly aft of the vehicle with the first switch in the neutral switch position, the drive controller further defining a left of neutral camera position corresponding with the first switch in the left of neutral first switch position to direct the video image to the left of and having an overlapping field of view with the video image in the neutral camera position and a right of neutral camera position corresponding with the first switch in the right of neutral first switch camera position to direct the video image to the right of and having an overlapping field of view with the video image in the neutral camera position, the second switch having extreme left of neutral, neutral and extreme right of neutral second switch positions, the drive controller further defining an extreme left of neutral camera position corresponding with the second switch in the extreme left of neutral switch position and an extreme right of the neutral camera position corresponding with the second switch in the extreme right of neutral switch position, the video images of the extreme left and the extreme right of neutral camera positions including directly lateral views from the vehicle; a monitor in the vehicle receiving the video image; a steering wheel, the first and second rocker switches being mounted to the steering wheel.

2. The video system of claim 1, the video camera being mounted to the vehicle by the rotary drive.

3. The video system of claim 1, the monitor being activated to display the video image when the first switch is actuated and remains activated.

4. The video system of claim 1, the video image appearing on the monitor during switching from the neutral camera position to each of the left of neutral camera position the right of neutral camera position, the extreme left of neutral camera position and the extreme right of neutral camera position.

5. The video system of claim 1, the transition time from the neutral camera position to each of the left of neutral camera position, the right of neutral camera position, the extreme left of neutral camera position and the extreme right of neutral camera position being less than two seconds.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic plan view of the fields of view of the vehicle camera system;

(2) FIG. 2 is a front view of the camera and drive;

(3) FIG. 3 I a side view of the camera and drive; and

(4) FIG. 4 is a front view of the steering wheel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(5) Turning in detail to the drawings, a camera system is located rearwardly on a vehicle. The system includes a camera 10 engaged with a rotary drive 12, with the combination mounted to a vehicle as shown schematically in FIG. 1. The camera 10 has a rectilinear lens and produces a continuous digital video image signal to a compatible monitor 14 located within the view of and reach of an operator in the vehicle, conveniently adjacent a steering wheel 16. The camera 10 may be of any commercially available that is sized to be unobtrusive on the vehicle. The model EC170-08 by Esky is illustrated in FIGS. 1 and 2. The video monitor 14 being used to display the image may be the OEM monitor that is provided with the vehicle as required by Federal Law FMVS 111 or a separate video monitor used expressly for the purpose of the camera 10. Two monitors may also be employed with switching between monitors by priority protocol or user preference for purposes of displaying or including other features provided with the vehicle.

(6) The rotary drive 12 includes a servo motor, stepper motor or other electromechanical device with a programmable drive controller 18 that allows the camera 10 to quickly pivot in a linear circumferential direction and stop at preprogrammed positions. The positions are set by the connected programmable drive controller 18. The camera 10 is supported on the output shaft 20 of the rotary drive 12. The rotary drive 12 is in turn mounted to the vehicle at mounting flanges 22, 24. The rotary drive 12 may be of any commercially available that is also sized to be unobtrusive on the vehicle and includes or is compatible with the programmable drive controller 18. The model HS65HB by HITEC of the rotary drive 12 and drive controller 18 is illustrated in FIGS. 1 and 2.

(7) Two switches 26,28 control the rotary drive through the programmable drive controller 18. The switches 26, 28 may be manually actuated. For convenient manipulation, switches 26, 28 are located diametrically to either side of the steering wheel 16 as shown in FIG. 4. Other switching formats may employ other mechanisms associate with the vehicle associated with other vehicle functions. Each manual switch 26, 28 is a three-way rocker switch spring biased to a neutral switch position between two actuating positions. Signals to the drive controller 18 to actuate the rotary drive 12 from a neutral position are only enabled with the rocker element forced against the spring bias in either direction. Each rocker switch 26, 28 returns to a neutral position with the rocker switch released, allowing the rotary drive 12 to be returned to a neutral position by the drive controller 18. One or both of the switches 26, 28 may activate the monitor 14 to display the video image of the camera 10. Activation of the monitor 14 may additionally require another vehicle condition such as gear selection, speed or direction of travel.

(8) The drive controller 18 is programmed for five positions and electrically coupled with the two rocker switches 26, 28. The neutral position provides a camera video image centered directly aft of the vehicle, preferably aligned and coincident with the longitudinal centerline of the vehicle. See field of view A in FIG. 1. The rocker switches 26, 28 share the same neutral camera position; and each is associated with a left of neutral position and right of neutral position. The left of neutral position for the rocker switch 26 is illustrated as field of view B in FIG. 1. Left and right are ascribed here to be from the vehicle operators point of view. The right of neutral position for the rocker switch 26 is illustrated as field of view C in FIG. 1. The rocker switch 28 is associated with a greater angular displacement of the video camera 10. The left of neutral position for the rocker switch 28 is illustrated as field of view D in FIG. 1. The right of neutral position for the rocker switch 28 is illustrated as viewing arc E in FIG. 1.

(9) The field of view A of the neutral camera position is shown to overlap with the fields of view B and C of the left and right of neutral camera positions, respectively. By including the overlap, the driver can retain a frame of reference as to how far the video camera 10 has panned to its new field of view. As the vehicle operator depresses the rocker switch 26, the new video image field of view is to appear on the monitor 14. The neutral field of view will appear as the video camera 10 begins to pan. The portion of the image at the leading edge of the neutral field of view will remain in the image during the full pan. Even if the operator momentarily looks away from the monitor 14, the reference point remains. Fields of view B and C are most useful for observing blind spots while the vehicle is moving forward. This will allow observation of vehicles closely trailing the vehicle and vehicle signaling to or actually moving in an adjacent lane. Further, the image is not distorted and is preferably displayed without lens magnification to provide a sense of real proportionate distance.

(10) The fields of view D and E are considered for comparison sake to be at extreme positions. These views include directly lateral views from the vehicle taking in, at least at the margins, a view laterally outwardly of the vehicle from each end of the vehicle bumper. These views are most useful in backing up. When perpendicularly parked to the curb amongst other vehicles, an operator may need to back up as much as eight feet to observe others directly behind adjacent vehicles. With these extreme fields of view, an overlapping reference with the neutral view is not important as it is the immediately lateral positions that are of interest. Again, the image is not distorted and is preferably displayed without lens magnification to provide a sense of real distance.

(11) The speed of pan is also important. Vehicles today travel at rates of speed that can cover significant distances in seconds. As a point of reference; a vehicle looking for a spot in a parking lot driving at just 11 miles per hour will travel 50 ft. in just three seconds. A quick glance at the monitor 14 is all that can be afforded at such speeds. Checking for vehicles in a lane to be entered is preferably performed in no more than two seconds. The relative location of traffic also is dynamic and a rapid pan allows the operator to maintain an appropriate frame of reference. Even in reverse and at little or no movement, people can almost instantly pop into view and require evasion. If checking laterally to each side, two seconds in either direction is significant.

(12) Thus, a video system for enhancing views for a vehicle operator is disclosed. While embodiments and applications of this invention have been shown and described, it will be apparent to those skilled in the art that more modifications are possible without departing from the inventive concepts herein. The invention, therefore, is not to be restricted except in the spirit of the appended claims.