As we reported back in February, SEL and sharp unveiled a 13.3" 8K OLED prototype. This ultra high density (664 PPI!) display uses SEL's C-axis-aligned crystalline oxide semiconductor (CAAC-OS) backplane.

SEL's previous 13" CAAC-OS OLED prototype featured 326 PPI. But that lower-resolution panel was flexible. This new panel uses white OLEDs with color filters. SEL adopted micro cavities to narrow the wavelengths. The display features a 84% NTSC color gamut (rather low for an OLED). Each OLED pixel is driven by five transistors and one capacitor (5T+C) - there are almost 500 million pixel transistors in this display.

Sharp's OLED plans are still not clear, although in past years the company showed several OLED display prototypes - including flexible displays. In April 2013 it was reported that Sharp decided to launch a three-year project to develop OLED mass production technologies.