Digital signs are made of tightly packed red, green, and blue LEDs that can display videos or changeable images (some are interactive too). Digital signs range from the simple flashing “Open” sign in a store window to large format video displays that you’ll see in shopping complexes. Most digital signs function the same way as your TV–the LEDs create the image, while a digital processor stores the information to be displayed. Since the display is entirely digital, you can change graphics (or videos) with the click of a button.