In PATEO, HMI design shall be centered on the driver and passengers (especially the driver), and be scenario-based (which helps identify and solve problems). HMI design shall ensure safety, convenience, entertainment and interaction, of which safety is of utmost importance.
Owing to development of hardware and diversification of interactive means (from simply pressing the buttons to integration of touch screen, voice, gesture, or face/eye recognition, etc.), during HMI design, the focus of in-vehicle instrument design has shifted from "information display + weak interaction" to "information display + strong interaction".
The difference between multi-screen and integrated screen lies in the mode of interaction and information display, and their similarity consists in integration of in-vehicle interactive system. In a word, during vehicle-user interaction, software and hardware shall be combined to guarantee accurate information input and quick information output.