Fast current programming method for OLEDs using negative capacitor circuit

C. H. Shim, R. Hattori

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    To accelerate the settling speed of current programming for AMOLEDs or PMOLEDs, the concept of a "negative capacitor," which consists of a differentiation circuit, an inverting voltage amplifier, and a voltage-to-current converter, was introduced. Circuit simulation showed that this circuit could shorten the settling time to a range of microseconds even for 10 nA of programming current in AMOLEDs. This new driving circuit enabled accurate gray-scale images by using both PWM and PAM methods in PMOLED panels.

    Original languageEnglish
    Pages (from-to)573-579
    Number of pages7
    JournalJournal of the Society for Information Display
    Issue number7
    Publication statusPublished - Jul 2009

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Electrical and Electronic Engineering


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