Display devices

摘要

A vehicle head-up display system wherein symbols representing information required by an observer in the vehicle can be displayed in combination with a representation of the vehicle environment. First and second raster scan output signals of the same format respectively representing the desired symbols and the vehicle environment are produced by respective read-out arrangements from respective storage devices which respectively store representations of the desired symbols and the vehicle environment in response to input signals of different formats, the two raster scan output signals being combined for application to the display unit of the system.