Digital placard

A digital placard comprising

• a frame structure and a display circuit;
• wherein the display circuit mounts in the frame structure;
• wherein the digital placard is configured to visibly display a hazard warning image selected from one or more hazard warning images from the intermodal freight container;
• wherein the display circuit is an electric circuit that displays the hazard warning image selected from the one or more hazard warning images;
• wherein the frame structure is configured to attach to the intermodal freight container such that the hazard warning image displayed from the display circuit is visible from the environment;
• wherein the display circuit forms an interface with the environment that allows for the selection of a hazard warning image from the one or more hazard warning images;
• wherein a control circuit includes an interface structure forms an interface that allows a viewer to scroll through and individually view each hazard warning image selected from the one or more hazard warning images;
• wherein the frame structure mounts on the intermodal freight container such that the selected hazard warning image is visible from the environment;
• wherein the frame structure is a mechanical structure;
• wherein the frame structure has a ring structure;
• wherein the display circuit mounts on the frame structure;
• wherein the frame structure further comprises a perimeter structure;
• wherein the perimeter structure forms the physical structure of the frame structure;
• wherein the perimeter structure is a solid structure that surrounds the characteristic aperture of the ring structure of the frame structure;
• wherein the perimeter structure forms the physical structure that secures the display circuit in the characteristic aperture of the frame structure;
• wherein the perimeter structure is a load bearing structure;
• wherein the perimeter structure is the structure of the frame structure that physically attaches to the exterior surface of the intermodal freight container;
• wherein the perimeter structure transfers the load of the display circuit to the intermodal freight container;
• wherein the display circuit mounts in the characteristic aperture of the ring structure of the frame structure;
• wherein the display circuit is an electric circuit;
• wherein the display circuit forms the structure that generates the visible image of the hazard warning image;
• wherein the display circuit mounts in the frame structure such that the generated hazard warning image is visible from the environment;
• wherein the display circuit stores the one or more hazard warning images;
• wherein the display circuit is an independently powered electric circuit;
• wherein by independently powered is meant that the display circuit can operate without an electrical connection to an external power source;
• wherein the display circuit comprises a logic circuit, a display device, the interface structure, and a power circuit;
• wherein the logic circuit, the display device, the interface structure, and the power circuit are electrically interconnected.