LEDs transform department store in Seoul
Xilver has supplied 5000 color-changing LED fixtures to provide a unique exterior for a department store in Seoul.
|Galleria - nighttime|
The Galleria department store is completely covered by a series of 80 cm-diameter frosted glass discs which are backlit by LED lights. The RainDrop lights contain 3 LEDs and are supplied by Xilver, an LED lighting manufacturer based in the Netherlands.
The LEDs change the color of each of the discs and thus enable the creation of a vivid play of colors and graphics to be displayed on the exterior of the store, which was once had a monotone concrete façade.
|Galleria - daytime|
|Galleria - before LEDs|
After being contacted by van der Heide in March 2004, Xilver developed a custom, waterproof, color-changing LED fixture that would be strong enough to color a frosted glass disc of 80 centimeter in diameter. It was also necessary to have control over the color of each of the 5000 lights.
Xilver developed a controller that can control up to 4 individual RGB LED lights called RainDrops. These RainDrops are individually addressable and thus controllable through any DMX-512 device.
|Rogier van der Heide|
To overcome this problem, Xilver developed a unique LED color-calibrating system. "We choose a red, green and blue LED as the benchmark for all other LEDs," says Tommy Voeten, general director of Xilver. "By varying the intensity and wavelength of the three colors one can adjust the colors of one fixture to match the benchmark fixture. Furthermore, we developed special software to automatically adjust the intensity and wavelength of each fixture related to the LEDs used from a particular binning."
Each lighting fixture of Xilver acts as a pixel of a video screen. The E:Cue programmer software intelligently combines lighting control with the display of videos and bitmaps through the Xilver color changing LED lighting fixtures. All kind of effects can be added easily to these images.
"All in all this was an exciting project," says Tommy Voeten, "I think that the lighting designers and the architects set a new landmark in urban architectural design."