Mitsubishi Electric displays a 155-inch sized OLED display, which consists of small sized OLED parts (estimated size is a 10x10cm square unit) at the Ceatec 2009. The large scale OLED display has been developed for digital signage and monitors placed at public spaces.
The screen is three times brighter than regular liquid crystal display TVs.

Another advantage of the screen's modular design is that there is no limit to how big the display can be made. The size of a video screen made using the displays is only limited by the resolution of the image, such as a high-definition video. But for advertising or other application, there's no limit to how big the screen can be, Terazaki said, saying it would theoretically be possible to cover an entire city with a single display.

Mitsubishi said the Diamond Vision OLED screen is expected to have a lifespan of 20,000 hours of normal operation.