Hybrid illuminated indicator sign

A hybrid illuminated indicator sign for visually displaying indicators when the hybrid illuminated indicator sign is electrically powered and for at least a period of time when the hybrid illuminated indicator sign is no longer electrically powered, the hybrid illuminated indicator sign comprising:

• a light guide plate having a light receiving edge and a light emitting face;
• a frame substantially surrounding the light guide plate;
• a photo-luminescent member secured to the frame;
• an outer indicator layer secured to the frame adjacent the light emitting face of the light guide plate;
• and
• an electrically powered light source mounted within the frame adjacent the light receiving edge of the light guide plate;
• wherein the light emitting face of the light guide plate comprises a first light emitting face and a second light emitting face facing opposite from the first light emitting face, and a reflective layer at least partially covering the second light emitting face, the reflective layer being opaque and having a thickness that is less than a thickness of the light guide plate;
• wherein in a powered-on state, the electrically powered light source is configured to emit light which causes photo-excitation of the photo-luminescent member, the emitted light entering the light guide plate through the light receiving edge and re-directed through the light emitting face to the outer indicator layer, and partially through the outer indicator layer to be visible from the exterior of the hybrid illuminated indicator sign;
• and
• wherein in a powered-off state, the electrically powered light source is configured to stop emitting light, and light from the photo-excited photo-luminescent member is transmitted partially through the outer indicator layer to be visible from the exterior of the hybrid illuminated indicator sign.