Nokia used the Display Week 2014 event on 6-10 June to showcase its advances in making a foldable OLED screen.
Two and three foldsAt the event in San Diego the manufacturer showed two versions of the screen, each with a bending radius of 2mm. The first was designed to fold in half, while the second could fold in on itself three times.
Both demonstrators were full-colour, 5.9-inch, 249ppi OLED displays - indicating that the Finnish producer is clearly looking to follow LG and Samsung in targeting the smartphone market.
Nokia is reported to have collaborated with the Tokyo-based Semiconductor Energy Laboratory (SEL) to advance the technology to this stage.
Limitations
There is still some work to do on perfecting the new bendable screens. The 2mm radius is not low enough to allow the folded over edges of the screen to touch each other. Secondly the screens stop working after being folded 100,000 times.
There is still some work to do on perfecting the new bendable screens. The 2mm radius is not low enough to allow the folded over edges of the screen to touch each other. Secondly the screens stop working after being folded 100,000 times.
There are no details as to when Nokia will have a production model available for device manufacturers.
Production
The new displays are made by printing the OLED, transistor and other layers on to a glass substrate. The glass is then removed and replaced with a flexible plastic alternative.
The new displays are made by printing the OLED, transistor and other layers on to a glass substrate. The glass is then removed and replaced with a flexible plastic alternative.
Nokia was not the only company displaying an advance in flexible screens at Display Week 2014. Plastic Logic unveiled its latest prototype fully flexible OLED display, though this still only renders black and white images.
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