Cambridge Display Technology (CDT) has announced another important step in the development of polymer light emitting diode (P-OLED) display technology with the production of a number of 14 inch full colour displays using ink jet printing.
The displays were produced at CDT’s Technology Development Centre in the UK, and feature a resolution of 1280 x 768 pixels x RGB, equivalent to almost three million sub-pixels, or over 30 million ink jet drops.
The active matrix panels use an amorphous silicon backplane, and were made using a multi-nozzle approach – up to 128 nozzles – with no interlacing, and are believed to be the first of their kind ever produced.
The development strengthens CDT’s view that multi-nozzle ink jet printing is the best approach to achieving scaleability and a low TAC time in the manufacture of high quality P-OLED displays.
Earlier this year, CDT demonstrated several 5.5 inch displays, and the latest 14 inch displays are part of a continuing program to develop both the underlying P-OLED technology and the means of manufacture. The WXGA+ panels were produced using printers from the Litrex Corporation, a company in which CDT currently has a 50% holding.
For CDT, Dr David Fyfe, CEO commented: “We are delighted at the rate of progress being demonstrated by these latest displays. It is not easy to produce high quality products when manufacturing a display design for the first time and in very small quantities, so the evident viewing quality and freedom from major defects demonstrated by these panels is especially encouraging.”