On-vehicle Information Devices Based on User Context

Smartphones are replacing conventional on-vehicle information devices, and many driver-related smartphone applications are available in the market. On-vehicle information devices can recognize driver and environmental contexts in addition to the vehicle context. We discuss how to use these contexts to advance the operability of on-vehicle information devices and the user's experience. Then, we implement a prototype system and evaluate it. In this paper, we first classify contexts that occur while driving. Second, we propose a user-interface control system based on these contexts. Finally, we evaluate the operation time for the proposed method. The results of the evaluation confirm the effectiveness of the proposal.