# Patent

## Title
Peripheral viewing system for a vehicle

## Abstract

A peripheral viewing system for a vehicle includes a pair of digital cameras, each positioned on the exterior of the vehicle proximately positioned where a side view mirror would typically be mounted. An additional digital camera is mounted on the vehicle roof immediately adjacent the top edge of the rear window. A plurality of LCD's each discretely associated with a corresponding camera are mounted within the vehicle passenger compartment at a location that is readily observable by the vehicle driver. The driver can panoramically view trailing traffic by observing the LCD's in the passenger compartment. One or more infrared phototransistor receivers are positioned at the rear of the vehicle for detecting oncoming vehicles. If the driver attempts to change lanes and activates a turn signal, a warning message will be emitted within the passenger compartment if any of the transistors detect an approaching vehicle within a predetermined range of the vehicle.

## Background
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of U.S. patent application Ser. No. 13/205,529, filed Aug. 8, 2011, which is a continuation of U.S. patent application Ser. No. 10/675,746, filed on Sep. 30, 2003, now U.S. Pat. No. 8,013,889, which claims the benefit of U.S. Provisional Application Ser. No. 60/417,986, filed on Oct. 11, 2002. All of the above mentioned applications are incorporated by reference herein in their entireties.


BACKGROUND OF THE INVENTION
The present invention relates to an improved peripheral viewing system for a vehicle that replaces conventional side and rearview mirrors.
DESCRIPTION OF THE PRIOR ART
Vehicles are typically equipped with externally mounted mirrors on each side, positioned immediately in front of the passenger and driver side doors to allow a driver to determine if vehicles are approaching from an adjacent lane. Vehicles are also equipped with a rearview mirror allowing the driver to observe trailing vehicles. However, such mirrors have several disadvantages. The field of view projected by such mirrors is limited thereby resulting in blind spots particularly with respect to the side view mirrors. The blind spots created by the side view mirrors are responsible for numerous accidents.
In an effort to reduce or eliminate the blind spots, automobile manufacturers employ concave or other reduction type mirrors; though such mirrors are somewhat effective in reducing blind spots, they are deceptive in that objects will appear to be smaller or farther away than actual. Finally, the externally mounted side view mirrors are obtrusive and often collide with other objects requiring frequent replacement. The obtrusive mirrors also significantly increase the wind drag on the vehicle. The present invention eliminates the problems associated with conventional side and rear view mirrors by providing a video monitoring system for a vehicle that greatly enhances the viewing range of the driver.
Although at least one vehicle video monitoring system exists in the prior art, the system has several disadvantages. For example, U.S. Pat. No. 5,680,123, issued to Lee discloses a vehicle monitoring system including a plurality of video cameras mounted in various locations on a vehicle exterior, including each side and the rear. A single video display is mounted within the passenger compartment. A specific camera output is only displayed in response to a triggering event such as activation of a turn signal or actuation of a vehicle alarm. If the turn signal is in a neutral position, only the rear camera output is displayed.
The above described device has several disadvantages. In order to display the output of a side video camera, a user activates the turn signal. However, only the side camera corresponding to the direction of the activated turn signal is displayed. Otherwise, the driver can only view the output of the rear camera. Additionally, the system employs a single video display limiting the driver to a single view at any given time. Finally, the system includes no warning system for alerting the driver of an approaching vehicle in the event the approaching vehicle is outside the viewing range of the cameras.
The present invention overcomes the above enumerated problems associated with conventional peripheral viewing systems by providing low profile, aerodynamic, side mounted digital cameras that continuously transmit a digital image to designated display screens within the vehicle passenger compartment allowing a vehicle driver to have a continuous, panoramic view of the vehicle exterior. A similar camera is mounted on the rear of the vehicle that continuously transmits an image to a corresponding display unit. The device also includes rear-mounted infrared sensors for warning the driver if an approaching vehicle is in the “blind spot” and therefore not visible on either of the displays.
SUMMARY OF THE INVENTION
The present invention discloses a peripheral viewing system for a vehicle. The system includes a low profile, externally mounted digital camera positioned immediately in front of both the passenger and driver door, in generally the same location as a conventional side view mirror. A similar low profile digital camera may be mounted on the vehicle roof immediately adjacent the top edge of the rear window. Each camera is electrically connected to a controlling computer that transmits the camera output to a designated LCD mounted within the vehicle passenger compartment. Preferably, the display associated with the driver side camera is positioned immediately to the left of the steering wheel while the display associated with the passenger side camera is mounted in front of the passenger seat but positioned to face the vehicle driver. The rear camera display is mounted immediately to the right of the vehicle steering wheel.
Additionally, the system may also include one or more infrared phototransistor detectors positioned on either side, near the vehicle rear, preferably immediately in front of the taillight. The phototransistor is in communication with the controlling computer and a speaker within the passenger compartment. Accordingly, if a trailing vehicle is approaching in the adjacent lane and is within a predetermined range of the vehicle, a warning signal is sent to the computer instructing it to emit a synthesized voice message warning the driver not to change lanes. The warning message is only emitted, however, if the driver activates a turn signal corresponding to the direction of the approaching vehicle.
It is therefore an object of the present invention to provide a vehicle viewing system that greatly exceeds the capabilities of conventional vehicle side and rear view mirrors.
It is another object of the present invention to provide a viewing system for vehicles that enhances vehicle safety.
It is yet another object of the present invention to provide a peripheral viewing system for a vehicle that eliminates the problems associated with obtrusive side mounted exterior mirrors.
Other objects, features and advantages of the present invention will become readily apparent from the following detailed description of the preferred embodiment when considered with the attached drawings and the appended claims.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top view of a vehicle with conventional rear and side view mirrors.
FIG. 2 is a side perspective view of a vehicle with a digital camera mounted thereon.
FIG. 3 is a top perspective view of the vehicle with the rear digital camera mounted thereon.
FIG. 4 depicts a side view of display panel according to the present invention.
FIG. 5 depicts a vehicle interior with the display panels mounted therein.
FIG. 6 depicts the infrared sensors mounted on a vehicle.
FIG. 7 depicts an infrared phototransistor receiver/transmitter according to the present invention.



DETAILED DESCRIPTION
Now referring to FIGS. 1 through 7, the present invention discloses a peripheral viewing system for a vehicle. The system includes a pair of low profile, externally mounted digital cameras 1 each positioned immediately in front of either the passenger or driver door in generally the same location as a conventional side view mirror 6. Each camera is encased within a contoured, aerodynamic housing 33 to minimize drag. A similar low profile digital camera 3 may be mounted on the vehicle roof immediately adjacent the top edge of the rear window for replacing the conventional rear view mirror 41. Preferably, each camera is a progressive scan, interline-transfer CCD.
Each camera is electrically connected to a controlling computer 10 mounted within the vehicle passenger compartment. The computer interlinks each camera with a designated liquid crystal display (LCD) or similar video display likewise mounted within the vehicle passenger compartment. Preferably, the display 5 associated with the driver side camera is positioned immediately to the left of the steering wheel while the display 7 associated with the passenger side camera is positioned immediately to the right of the steering wheel. In the event that a rearview camera is used, the display 9 associated therewith is mounted immediately to the right of the vehicle steering wheel while the passenger side display panel is mounted in front of the passenger compartment but positioned to face the vehicle driver. Each display also includes a brightness control knob 12 mounted thereon to minimize distraction to the driver. Each display may include a mounting bracket 42 for installing on a vehicle dash board, or the displays may be integral therewith.
Additionally, the system may also include one or more infrared phototransistor detectors 2 positioned on the side of the vehicle, near the rear, immediately adjacent the taillight. The phototransistor is in communication with the controlling computer and a speaker 4. Each phototransistor includes an infrared transmitter LED 30 and a modulated infrared receiver 31. The sensors are able to detect objects within a predetermined range of the vehicle. Preferably, the sensors are operated at 40, Khz modulation so as to reject spurious light.
Accordingly, if a trailing vehicle is approaching in the adjacent lane and is within the predetermined range of the vehicle, a warning signal is sent to the computer instructing it to emit a synthesized voice message via the speaker to warn the driver not to change lanes. The warning message is only emitted however if the driver activates a turn signal corresponding to the direction of the approaching vehicle while the approaching vehicle is within the predetermined range.
Although there has been shown and described the preferred embodiment of the present invention, it will be readily apparent to those skilled in the art that modifications may be made thereto which do not exceed the scope of the appended claims. Therefore, the scope of the invention is only to be limited by the following claims.

## Claims

1. A system for providing warning to a driver of a vehicle that includes two opposing sides, a steering wheel positioned within a passenger compartment, and a rear, the system comprising:
a computer;
one or more phototransistors, each mounted on each side of the vehicle and adjacent the rear of the vehicle, wherein each phototransistor is electrically connected to the computer; and
an audible alarm means electrically connected to the computer for audibly alerting a driver if one of the one or more phototransistor detects an object within a predetermined range of the vehicle,
wherein the vehicle includes a turn signal switch means electrically connected to the computer for exclusively activating the audible alarm means if the object is within the predetermined range of the vehicle.

2. The system of claim 1, wherein the object is a trailing vehicle.

3. The system of claim 1, wherein the one or more phototransistors are sensors that operate at 40 Khz modulation so as to reject spurious light.

4. The system of claim 1, wherein the one or more phototransistors are infrared phototransistor detectors.

5. The system of claim 1, wherein at least one of the one or more phototransistors is positioned immediately adjacent the taillight of the vehicle.

6. A method for providing warning to a driver of a vehicle that includes two opposing sides, a steering wheel positioned within a passenger compartment, and a rear, the method being implemented by a computer including one or more processors, the method comprising:
providing a computer;
providing one or more phototransistors, each mounted on each side of the vehicle and adjacent the rear of the vehicle, to detect objects within a predetermined range of the vehicle, wherein each phototransistor is electrically connected to the computer;
providing an audible alarm means to audibly alert a driver if one of the one or more phototransistor detects an object within the predetermined range of the vehicle, wherein the audible alarm means is electrically connected to the computer; and
providing a turn signal switch means to exclusively activate the audible alarm means if the object is within the predetermined range of the vehicle, wherein the turn signal switch means is electrically connected to the computer.

7. The method of claim 6, wherein the object is a trailing vehicle.

8. The method of claim 6, wherein the one or more phototransistors are sensors that operate at 40 Khz modulation so as to reject spurious light.

9. The method of claim 6, wherein the one or more phototransistors are infrared phototransistor detectors.

10. The method of claim 6, wherein at least one of the one or more phototransistors is positioned immediately adjacent the taillight of the vehicle.