DATA TRANSMITTER AND METHOD FOR DATA TRANSMISSION

A data transmitter to be mounted on a vehicle detects the driver's state from output data of a camera mounted on the vehicle. The data transmitter determines whether the driver's state is suitable for continuing the control by the level of autonomous driving; transmits, when it is determined that the state is suitable for continuing the control, the face image to a terminal communicably connected via a communication network, together with a first setting for displaying the face image on the terminal in first mode; and transmits, when it is determined that the state is unsuitable for continuing the control, the face image to the terminal, together with a second setting for displaying the face image on the terminal in second mode that draws more attention of a user of the terminal than the first mode.