Philips has created a totally transparent OLED display, called the Lumiblade, a basic, super-bright lamp slab that had previous problems with 'luminance variability.' It essentially becomes opaque when it’s powered. This means that OLED panels could function as ordinary windows during the day and then morph into panels of light after dark, either by imitating natural light or by emitting attractive interior lighting. During the day, people would be able to create their own private area by turning transparent glass walls, windows or doors into walls of light whenever they liked.

Philips will unveil the Lumiblade OLED panels to the market within the next 3 to 5 years.

[Wired]