The former of Outdoor LED display is the Bulletin Board, which is the main large advertising board used to business or politics promotion. The main usage of Bulletin Board is to stand out from the complex city background, and attract attention from flow crowd. However, the received information is limited due to the quick movement. Thus, obvious signs and logos are the first options to appear on the Bulletin Board. 

Thanks to the quick science development, CRT technology was invented in year 1923, and LED in 1962 then LCD in 1972. The screen size is become larger and larger, excellent image delivery, lower power consumption, all these new technology comes true. Compared to the traditional Bulletin Board, LED display owns more advantages such as convenient contents updating, easier customization, low cost, at the same time, live broadcasting images will attract attentions easier.

Architects integrate large LED screens with architectures and design a so called “Media Surface” to process information. To express the understanding to environments then give an auto criticism to the value of architectures themselves. To take the Green Pix Video Wall in Peking Xicui Entertainment center as an example. This integrated system can absorb the sunlight energy at day time, while at night it can deliver different colors according to the energy saving condition. Even when there is live hot abject activity around, the color will follow it like the creatures acting to the environment change.