The TLO (Triangle Light Object, or Transparent Light Origami) panels were designed by Emory Krall for Universal Display to show how the colors of OLED are additive. The hinged design allows the triangles to twist and overlap each other. When you view the overlapping glowing panels, new colors of light appear. For example, red and green produce a yellow light. When the red green and blue panels overlap, white light is achieved. You can see a demonstration of this in a video.