# US 12,602,995 B2 · Rear vehicle approach notification apparatus and notification method of the rear vehicle approach notification apparatus

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- Number: US 12,602,995 B2
- Document ID: US12602995B2
- Status: Granted
- Kind: B2
- Application number: 19/018,467
- Filed: 2025-01-13
- Published: 2025-10-30
- Granted: 2026-04-14
- Earliest claimed: 2024-04-26
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Shunta Uchiyama; Jumpei Inagaki
- Web page: https://patentgrep.com/patent/US12602995B2

## CPC

- G08G 1/0967: Systems involving transmission of highway information, e.g. weather, speed limits (transmission of navigation instructions to the vehicle G08G1/0968)
- B60R 1/26: to the rear of the vehicle
- G06V 20/58: Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
- G06V 20/597: {Recognising the driver's state or behaviour, e.g. attention or drowsiness}
- H04N 7/181: {for receiving images from a plurality of remote sources}
- H04N 23/90: Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
- B60R 2300/8066: for monitoring rearward traffic
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A rear vehicle approach notification apparatus includes an in-vehicle display, a speaker configured to output sound from a position different from the in-vehicle display to the driver, a first determination unit, a second determination unit, and a notification unit. The notification unit, when the first determination unit determines that a rear vehicle is approaching the host vehicle, performs the notification by displaying a rear vehicle approach display on the in-vehicle display without outputting sound from the speaker.

## Claims

### Claim 1

A rear vehicle approach notification apparatus, comprising:
a rear camera configured to capture an image of a rear side of a host vehicle;
a driver monitor camera configured to capture a facial image of a driver of the host vehicle;
an in-vehicle display configured to display the captured image to the driver;
a speaker configured to output sound from a position different from the in-vehicle display to the driver;
a first determination unit configured to determine whether a rear vehicle traveling behind the host vehicle is approaching the host vehicle;
a second determination unit configured to determine whether the driver is viewing the in-vehicle display based on the facial image captured by the driver monitor camera; and
a notification unit configured to notify the driver of the approach of the rear vehicle when the first determination unit determines that the rear vehicle is approaching the host vehicle,
wherein the notification unit, when the first determination unit determines that the rear vehicle is approaching the host vehicle, performs the notification by displaying a rear vehicle approach display on the in-vehicle display without outputting sound from the speaker,
wherein, during the rear vehicle approach display on the in-vehicle display, if the second determination unit determines that the driver is viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is continued, and
wherein, during the rear vehicle approach display on the in-vehicle display, if the second determination unit determines that the driver is not viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is changed to an emphasized approach display, or sound output from the speaker is performed in addition to the rear vehicle approach display on the in-vehicle display.

### Claim 2 (depends on 1)

The rear vehicle approach notification apparatus according to claim 1,
wherein the in-vehicle display includes a main body and an outer peripheral portion surrounding the main body,
wherein the outer peripheral portion is illuminated as the rear vehicle approach display, and
wherein the outer peripheral portion is blinked as the emphasized approach display.

### Claim 3 (depends on 2)

The rear vehicle approach notification apparatus according to claim 2,
wherein the notification unit, during the rear vehicle approach display on the in-vehicle display, if the second determination unit determines that the driver is not viewing the display, changes the rear vehicle approach display on the in-vehicle display to the emphasized approach display and performs sound output from the speaker.

### Claim 4 (depends on 1)

The rear vehicle approach notification apparatus according to claim 1,
wherein the notification unit, during the rear vehicle approach display on the in-vehicle display, if the second determination unit determines that the driver is not viewing the display, changes the rear vehicle approach display on the in-vehicle display to the emphasized approach display and performs sound output from the speaker.

### Claim 5

A notification method of a rear vehicle approach notification apparatus equipped with a rear camera mounted on a host vehicle to capture an image of a rear side of the host vehicle, a driver monitor camera configured to capture a facial image of a driver of the host vehicle, an in-vehicle display configured to display the captured image to the driver, and a speaker configured to output sound from a position different from the in-vehicle display to the driver, the method comprising:
a first determination step of determining whether a rear vehicle is approaching the host vehicle;
a second determination step of determining whether the driver is viewing the in-vehicle display based on the facial image captured by the driver monitor camera when the rear vehicle traveling behind the host vehicle is approaching the host vehicle; and
a notification step of notifying the driver of the approach of the rear vehicle when the first determination step determines that the rear vehicle is approaching the host vehicle,
wherein, in the notification step, when the first determination step determines that the rear vehicle is approaching the host vehicle, the notification is performed by displaying a rear vehicle approach display on the in-vehicle display without outputting sound from the speaker,
wherein, during the rear vehicle approach display on the in-vehicle display, if the second determination step determines that the driver is viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is continued, and
wherein, during the rear vehicle approach display on the in-vehicle display, if the second determination step determines that the driver is not viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is changed to an emphasized approach display, or sound output from the speaker is performed in addition to the rear vehicle approach display on the in-vehicle display.

### Claim 6

A rear vehicle approach notification apparatus, comprising:
a rear camera configured to capture an image of a rear side of a host vehicle;
a driver monitor camera configured to capture a facial image of a driver of the host vehicle;
an in-vehicle display configured to display the captured image to the driver;
a speaker configured to output sound from a position different from the in-vehicle display to the driver;
a processor configured to:
determine whether a rear vehicle traveling behind the host vehicle is approaching the host vehicle;
determine whether the driver is viewing the in-vehicle display based on the facial image captured by the driver monitor camera; and
notify the driver of the approach of the rear vehicle when the rear vehicle is approaching the host vehicle,
wherein the processor, when the rear vehicle is approaching the host vehicle, performs the notification by displaying a rear vehicle approach display on the in-vehicle display without outputting sound from the speaker,
wherein, during the rear vehicle approach display on the in-vehicle display, if the processor determines that the driver is viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is continued, and
wherein, during the rear vehicle approach display on the in-vehicle display, if the processor determines that the driver is not viewing the in-vehicle display, the rear vehicle approach display on the in-vehicle display is changed to an emphasized approach display, or sound output from the speaker is performed in addition to the rear vehicle approach display on the in-vehicle display.