Driving assistance apparatus

1. A driving assistance apparatus, comprising:

a driving assister that assists driving by a driver of a vehicle, by way of driving assistance functions;

a controller that obtains inattentive state information indicating an inattentive state of the driver, and reduces or deactivates at least one driving assistance function among the driving assistance functions, by controlling the driving assister based on the inattentive state information obtained; and

an attentiveness state detector that detects the inattentive state of the driver, and outputs the inattentive state information indicating the inattentive state detected,

wherein, when the attentiveness state detector distinguishes between an attentive state in which the driver is paying attention and the inattentive state in which the driver is not paying attention, the attentiveness state detector detects, as the inattentive state, a state in which a degree of awareness of the driver is less than or equal to a specified value or a state in which the driver is not paying attention to a front of the vehicle,

the driving assistance functions include at least one highly visible driving assistance function which is highly visible to the driver and other driving assistance functions different from the at least one highly visible driving assistance function, and

when the degree of awareness is less than or equal to the specified value as the inattentive state, the controller reduces or deactivates the at least one highly visible driving assistance function first, and after controlling the highly visible driving support function, the controller reduces or deactivates a greater number of the other driving assistance functions as the degree of awareness is lower.

2. The driving assistance apparatus according to claim 1 ,

wherein, after the controller reduces or deactivates the at least one highly visible driving assistance function, the controller reduces or deactivates the greater number of the other driving assistance functions on a predetermined period interval basis until the driver becomes aware.

3. The driving assistance apparatus according to claim 1 ,

wherein the controller includes a function for arbitrarily setting a sequence of the other driving assistance functions to reduce or deactivate after the controller reduces or deactivates the at least one highly visible driving assistance function.

4. The driving assistance apparatus according to claim 1 ,

wherein the at least one highly visible driving assistance function includes at least one of an augmented reality (AR) display by an AR display device of the vehicle or a function for adjusting brightness of light being emitted by a headlamp of the vehicle.

5. The driving assistance apparatus according to claim 1 ,

wherein, when the controller obtains the inattentive state information, the driving assister deactivates an automatic anti-glare function of an anti-glare mirror of the vehicle.

6. The driving assistance apparatus according to claim 1 ,

wherein, when the controller obtains the inattentive state information, the driving assister deactivates display of information related to driving assistance displayed on a side mirror of the vehicle.

7. The driving assistance apparatus according to claim 1 ,

wherein, when the controller obtains the inattentive state information, the driving assister reduces an amount of power assist or deactivates the power assist provided by a power steering of the vehicle.

8. The driving assistance apparatus according to claim 1 , further comprising:

a presenter that presents the at least one driving assistance function that has been reduced or deactivated by the controller.

9. The driving assistance apparatus according to claim 1 ,

wherein, when the controller obtains a restoration signal input through operation of an operation input interface by the driver, for restoring the at least one driving assistance function that has been reduced or deactivated, the controller restores the at least one driving assistance function that has been reduced or deactivated.

10. The driving assistance apparatus according to claim 9 ,

wherein the operation input interface includes an operation switch provided in a vicinity of a meter of the vehicle or at an upper portion of a center console of the vehicle.

11. The driving assistance apparatus according to claim 10 ,

wherein the operation switch is any one of a pull switch, a toggle switch, or a touch switch that receives touch-gesture input.

12. The driving assistance apparatus according to claim 10 ,

wherein the operation switch includes a cover that covers an operation portion of the operation switch.

13. The driving assistance apparatus according to claim 1 ,

wherein the attentiveness state detector detects the attentive state of the driver, and

the controller restores the at least one driving assistance function that has been reduced or deactivated, by controlling the driving assister based on attentive state information obtained from the attentiveness state detector and indicating the attentive state of the driver.