Semiconductor Energy Laboratory (SEL) Co Ltd exhibited an OLED display that can be folded in three at Display Innovation 2014, a trade show that runs from Oct 29 to 31, 2014, in Yokohama City, Japan.
SEL announced a similar display with a screen size of 5.9 inches at SID 2014, an academic conference that took place in June 2014. This time, however, it increased screen size and added a touch-panel function.
The screen size, pixel count and resolution of the new OLED display, which SEL calls "Foldable Display," are 8.7 inches, 1,080 x 1,920 and 254ppi, respectively. For its backplane, a c-axis aligned oxide semiconductor is used. Its gate driver is formed on a substrate, and its source driver is realized by COF (chip on film).
The thickness, mass and aperture ratio of the display are 100μm or less, 6g and 46%, respectively. The color display is realized by combining a color filter and white OLEDs having a tandem structure. The OLED element is a top-emission type. And SEL employed a capacitive touch panel.