Signal device and collision avoidance system

1. A turn signal device comprising:

a right turn signal, provided on a right side of a rear part of a host vehicle, the right turn signal having a plurality of light-emitting units arranged in a vehicle width direction of the host vehicle;

a left turn signal, provided on a left side of the rear part of the host vehicle, the left turn signal having a plurality of light-emitting units arranged in the vehicle width direction of the host vehicle;

an operation device, provided in a driver cab of the host vehicle, the operation device being capable of generating an operation signal for causing one or both of the right turn signal and the left turn signal to operate in response to an operation made by a driver;

an acquisition unit that acquires a determination signal indicating a determination result of whether or not there is a risk of a collision between the host vehicle and a following vehicle traveling behind the host vehicle;

a normal situation control unit that, on the basis of the operation signal, outputs a normal situation control signal such that the plurality of light-emitting units in one or both of the right turn signal and the left turn signal light up sequentially from an inner side to an outer side with respect to the vehicle width direction at constant time intervals, wherein the normal situation control unit outputs the normal situation control signal such that after a first light-emitting unit of the plurality of light-emitting units lights up, a second light-emitting unit of the plurality of light-emitting units lights up while the first light-emitting unit lights up; and

a dangerous situation control unit that, upon the determination signal indicating a determination result that there is a risk of the collision being acquired, outputs a dangerous situation control signal such that the plurality of light-emitting units in both of the right turn signal and the left turn signal light up sequentially from the outer side to the inner side with respect to the vehicle width direction at constant time intervals, wherein the dangerous situation control unit outputs the dangerous situation control signal such that after the first light-emitting unit of plurality of light-emitting units lights up, the second light-emitting unit lights up while the first light-emitting unit lights up.

2. The turn signal device according to claim 1 , further comprising:

a switching unit that, upon the determination signal indicating a determination result that there is a risk of the collision being acquired while the normal situation control signal is being outputted, stops the output of the normal situation control signal and outputs the dangerous situation control signal.

3. The turn signal device according to claim 2 ,

wherein upon the determination signal indicating a determination result that there is no risk of the collision being acquired while the dangerous situation control signal is being outputted, the switching unit stops the output of the dangerous situation control signal and outputs the normal situation control signal.

4. The turn signal device according to claim 3 ,

wherein the dangerous situation control unit changes one or both of a time at which the respective pluralities of light-emitting units start lighting up, and a light emission amount of those light-emitting units, on the basis of a level of the risk of the collision.

5. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 4 , the turn signal device being controlled on the basis of a determination result from the determination unit.

6. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 3 , the turn signal device being controlled on the basis of a determination result from the determination unit.

7. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 2 , the turn signal device being controlled on the basis of a determination result from the determination unit.

8. The turn signal device according to claim 2 ,

wherein the dangerous situation control unit changes one or both of a time at which the respective pluralities of light-emitting units start lighting up, and a light emission amount of those light-emitting units, on the basis of a level of the risk of the collision.

9. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 8 , the turn signal device being controlled on the basis of a determination result from the determination unit.

10. The turn signal device according to claim 1 ,

wherein the dangerous situation control unit changes one or both of a time at which the respective pluralities of light-emitting units start lighting up, and a light emission amount of those light-emitting units, on the basis of a level of the risk of the collision.

11. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 10 , the turn signal device being controlled on the basis of a determination result from the determination unit.

12. A collision avoidance system comprising:

a detection device, provided in a rear part of a host vehicle, the detection device detecting a following vehicle traveling behind the host vehicle in a non-contact manner;

a determination unit that, on the basis of a detection result from the detection device, determines whether or not there is a risk of a collision between the host vehicle and the following vehicle; and

the turn signal device according to claim 1 , the turn signal device being controlled on the basis of a determination result from the determination unit.