Abstract: A signal processing device and a display apparatus for vehicles including the same are disclosed. The signal processing device includes a processor configured to process a signal for a display mounted in a vehicle, wherein the processor is configured to execute first to third virtual machines on a hypervisor in the processor, the second virtual machine is operated for a first display, the third virtual machine is operated for a second display, and the first virtual machine in the processor is configured to control a shared memory based on the hypervisor for transmission of identical data to the second virtual machine and the third virtual machine. Consequently, it is possible for a plurality of displays in the vehicle to display identical images in a synchronized state.

Abstract: An advertisement board, which comprises one or more light emitting diodes capable of full-color display, one or more advertisement sheets, a light guide plate, and a frame, comprises: a frame which is provided with a containing portion for containing the one or more light emitting diodes, the one or more advertisement sheets, and the light guide plate, and parts of which are openable and closable in order to easily replace the one or more advertisement sheets; the one or more light emitting diodes placed at one side of the frame; the one or more advertisement sheets located on the light emitting diodes, and displaying advertisement contents by the light emitted from the light emitting diodes; the light guide plate which is located on the rear surface of the one or more advertisement sheets, diffuses the light emitted from the light emitting diodes, and sends the light to the one or more advertisement sheets to make the picture quality of the advertisement contents clearer