Display system comprising a transparent emissive screen

Claim 1

A display system of the type comprising a transparent emissive display screen allowing light information to be displayed and placed in an optical path intended to transport the image of an external scene, further comprising at least a first polarizing filter placed in the same optical path between said external scene and said screen, at least a second polarizing filter placed in the optical path and means for variably crossing the polarizing filters with respect to each other so as to adjust the luminosity of the image of the external scene seen through said first and second polarizing filters without obscuring the information displayed on the screen wherein the means for crossing the filters comprise a photoelectric cell disposed outside the optical path of said first and second polarizing filters for measuring the luminosity of the external scene and for controlling a motor for rotating one of the polarizing filters.