JOLED has succesfully developed a printed 4k OLED panel and has already started shipping samples to Sony.

JOLED, established by integrating the OLED research and development operations of Sony nd Panasonic, has started shipping samples of a 21.6-inch 4k (3,840 x 2,160 pixels) OLED panel to Sony, which will use them in medical monitors.

JOLED's OLED panels are made using the "RGB Printing Method," which uses three types of OLED materials (red, green and blue materials) for printing. Unlike the vapor deposition method, which is currently mainstream, the RGB Printing Method does not require a high-resolution mask for applying different materials and makes it easy to deal with large-size panels.

Also, compared with a method that combines white OLEDs and color filters, which are used for OLED TVs, the new method realizes a lower power consumption because it does not use color filters, according to JOLED.

JOLED says it achieved the verification of the commercialization of printed OLED panels two years after the establishment of the company, and plans to soon enter a full business phase.