Display device and driving method therefor, and vehicle

A displaying device, wherein the displaying device comprises:

• a backlight module, wherein the backlight module comprises at least one lamp board;
• a display panel located on one side of the backlight module;
• at least two first driving-chip groups, wherein each of the first driving-chip groups comprises at least two first driving chips, and all of the first driving chips are electrically connected to the display panel;
• at least two first circuit boards, wherein each of the first circuit boards is electrically connected to one instance of the first driving-chip groups, the first circuit boards are cascaded to each other, and at least some of signals transmitted in the first circuit boards are synchronous;
• and the first circuit boards are electrically connected to the backlight module;
• and
• a system chip, electrically connected to the first circuit boards, and configured for providing at least two channels of a same video signal to the at least two first circuit boards, and receiving a touch-controlling signal from the display panel, wherein:
• the displaying device comprises two instances of the first circuit boards;
• the two first circuit boards include a main circuit board and a secondary circuit board, the main circuit board further comprises a first electric-power supplying module, a second electric-power supplying module and a first connector, the secondary circuit board further comprises the first electric-power supplying module, the second electric-power supplying module and the first connector, the first electric-power supplying module is electrically connected to the display panel, the second electric-power supplying module is electrically connected to the backlight module, and the first connector is electrically connected to the system chip;
• the main circuit board comprises a first power-supply interface, the first power-supply interface is electrically connected to the first electric-power supplying module and an electric-power supplying device, and the first power-supply interface is configured for supplying electric power simultaneously to the first electric-power supplying modules of the main circuit board and the secondary circuit board;
• and
• each of the main circuit board and the secondary circuit board comprises a second power-supply interface, the second power-supply interface is electrically connected to the second electric-power supplying module and the electric-power supplying device, and the second power-supply interface is configured for supplying electric power to the second electric-power supplying module.