Helmet mounted display system adjustable for bright ambient light conditions

A Helmet Mounted Display (HMD) system, to be mounted on a helmet of a user, said HMD comprising:

• a tinted visor, coupled with said helmet, said tinted visor being located in front of the face of said user when said tinted visor is in an operative position, said tinted visor further including a patch, said patch being located in front of an eye of said user, said patch having greater light transmission than the rest of said tinted visor;
• a display screen separate from said tinted visor, said display screen being located in front of said patch and intersecting the optical axis of said eye;
• an image acquisition device, coupled with said display screen, said image acquisition device acquiring an outside-scene image, and transmitting said outside-scene image for display on said display screen;
• an image generator, coupled with said helmet and with said display screen, said image generator generating an image to be displayed to said user, said image generator transmitting said generated image to be superimposed with said outside-scene image on said display screen, said superimposed image being transmitted through said patch toward said eye,
• wherein said patch has an photochromically controllable light transmission, controlled by the light of said image generated by said image generator.