A novel RGB multicolor light-emitting polymer display

We have developed a system for depositing the light-emitting polymers (LEP) poly(para-phenylene vinylene) (PPV) for a green or a red emitter with a conventional ink jet head followed by spin-coating of poly(di-octyl fluorene) (F8) for an electron-transferring layer or a blue emitter. Using this system, we have succeeded in patterning electroluminescent (EL) layers on a thin film transistor (TFT) substrate using the inkjet process and displaying a multicolor image using the TFT–LEP display.