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Flexible OLED display from Sony

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Posted May 26, 2007 by admin in Displays

Weighing in at 1.5g, Sony’s 2.5″ (6cm) display is only 0.3mm and has a resolution of 120×160, which according to Sony is the worlds highest definition for a flexible display. The display also has a 1000:1 contrast ratio. OLED displays are insanely thin due to OLEDs being their own light source, or in other words, they don’t require backlighting.

A Sony spokesmen has told Daily Mail about the potential uses for the product – “In the future, it could get wrapped around a lamppost or a person’s wrist, even worn as clothing,” said Sony spokesman Chisato Kitsukawa. “Perhaps it can be put up like wallpaper.”

Tatsuo Mori, professor at Nagoya University’s Department of Electrical Engineering and Computer Science, said “To come up with a flexible screen at that image quality is groundbreaking, you can drop it, and it won’t break because it’s as thin as paper.”

One of OLED’s current major competitors is E-Paper or E-Link. E-Paper – unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, is capable of holding text and images indefinitely without drawing electricity, while allowing the image to be changed later. One important feature is that the pixels are bi-stable, so that the state of each pixel can be maintained without a constant supply of power.

LG.Phillips has already shown off a 14.1″ E-paper display. According to specifications, the screens are only capable of a refresh rate of slightly less than one second – which certainly removes the possibility of viewing movies on them. On the other hand OLED can refresh faster, putting them one-up on the competition. Lifespan is an issue though, regular blue LED’s last about 5,000 hours which is dramatically lower than LCD and Plasma panels. Also worth noting is that OLED’s require a constant power source to retain their images, whereas E-paper only use power when charge is needed.

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