Diamond Vision flood beam CRT's. Predecessors to today's bright RGB LED's in large display signs. They differ from the CRT tubes used in old monitors by being small, and having a nonfocused electron beam “flood” spraying onto single color phosphor. Diamond Vision once had a rooftop sign near Times Sq. at 47th@7th, but large LED signs have now taken completely over.
Taking the Philips Illuminate bulb apart to replace defective LED array. It combines a three-die RGB unit with a 2700K soft white die, instead of mixing RGB values to create the color (cool white is made with the RGB, however)
Philips Illuminate, partly controllable RGB LED set. Control is with mobile app. Limited control-ability now, but can be improved with software updates. Also adds warm white LED inside module, so it can switch between color and warm white (cool white is made with RGB).
These individually addressable (digital; "smart") LED module strings (WS2801?) are starting to appear in store windows, replacing neon perimeter tubes. Analog (non addressable, "dumb"; whole string one color at a time) and single LED module strips have also become widespread).
By now "archaic" original 1999 LED display on ABC Times Square Studios. The top 7 bands were SRGB (separate red, green and blue) LED's, and the bottom two were red and green only. (the bottom usually set to green, and the one above it set to mixing red and green for amber). The large screen was still older flood beam CRT pixel technology, which was the predecessor to LED's on large signs. The whole display would in 2007 be retrofitted with the current higher resolution discreet RGB LED's.