US Patent 9738225 Electronic display panels for buses

A display system mounted on one or more sides of a public transportation vehicle (e.g., a bus). The display system is interfaced with a portable computing device (e.g., a personal data assistant), where the portable computing device provides updated messages to be displayed on a display panel. The display system includes at least one display panel mounted on one side of a bus, facing outwards such that the display panels may be readily seen when the bus goes around. The display panel is mainly for displaying messages provided by the portable computing device but also for displaying default messages in a local storage device.