Design and realization of a flexible QQVGA AMOLED display with organic TFTs

We present a QQVGA top emitting monochrome AMOLED display with 85dpi resolution using an organic TFT backplane on low temperature PEN-foil. The backplane process flow is based on a 7 layer photolithography process that yields a final mobility of the OTFT of ∼0.4 cm2/Vs. The aperture ratio of the top-emitting OLEDs is over 75%. For operation at 10 V supply voltage (VDD), the brightness of the display using red and green OLEDs exceeds 200 cd/m2.

We present a QQVGA top emitting monochrome AMOLED display with 85dpi resolution using an organic TFT backplane on low temperature PEN-foil. For operation at 10 V supply voltage (VDD), the brightness of the display using red and green OLEDs exceeds 200 cd/m2. The display is rolled more then 3000 times over a diameter of 7.5 mm without any degradation.Figure optionsDownload as PowerPoint slideHighlights
► Integrated process flow for top-emitting AMOLED display on foil is demonstrated.
► Current drive of an 85dpi pixel engine is more than 16 μA using organic TFT because of high-k dielectric.
► The brightness of the monochrome display exceeds 200 cd/m2.
► Roll ability over a diameter of 7.5 mm is demonstrated.