A user interface for a vehicle presents visible information and acquires user input. The user interface includes a two-dimensional display and an optical faceplate. The two-dimensional display displays information on a display portion. The optical faceplate includes a contact surface, a three-dimensional display surface, and an optic light guide material provided between the contact surface and the three-dimensional display surface. The two-dimensional display includes a pixel arrangement. The contact surface contacts the two-dimensional display to transmit information from the pixel arrangement to the three-dimensional display surface. The three-dimensional display surface is touch sensitive. The optical faceplate is arrangeable within a cabin of the vehicle.

The signal processing device includes a processor to execute a plurality of virtual machines, a first memory to store a file corresponding to a first application executed based on entry into a standby mode, and a second memory to load a file stored in the first memory based on the switching from the standby mode to an active mode, wherein the processor is configured to restore the first application based on the file loaded to the second memory during the switching from the standby mode to the active mode, terminate a second application executed in another virtual machine based on the entry into the standby mode, turn on the other virtual machine based on the switching from the standby mode to the active mode, and execute the second application after an operating system is executed. Accordingly, it is possible to shorten a booting period or wakeup period of some applications that are executed in the vehicle.

A display device for a vehicle comprises a display module having a display panel and a cover window disposed on one side of the display panel, and a drive mechanism for laying down the display module or standing the display module up, wherein the cover window may comprise: a total reflection area in which an image emitted from the display panel is totally reflected; and a transmission area in which the image emitted from the display panel is transmitted.