Using a WTC OLED device and a backplane using CAAC-OSFETs over a glass substrate employing the 1.5 m rule, we fabricated a 2.78-in 1058-ppi OLED display, the pixel density of which is the highest in the world among displays using thin film transistors over a glass substrate.

-We fabricated new 2.78-in 1058-ppi organic light-emitting diode (OLED) displays. The displays used OLED devices with a tandem structure and a single structure and a field effect transistor (FET) using c-axis aligned crystalline In-Ga-Zn-O (CAAC-IGZO) for an active layer and employing the 1.5-μm rule over a glass substrate. Even in the displays with such high resolution exceeding 1000 ppi, crosstalk that was observed in the lower luminance region was suppressed. The displays achieved high color reproducibility and reduced viewing angle dependence.