AMOLED (Active Matrix Organic Light Emitting Diode)

H@ri's Jots

AMOLED (active-matrix organic light-emitting diode) is a display technology for use in mobile devices and televisions. OLEDdescribes a specific type of thin-film-display technology in which organic compounds form the electroluminescent material, andactive matrix refers to the technology behind the addressing of pixels. As of 2012, AMOLED technology is used in mobile phones, media players and digital cameras, and continues to make progress toward low-power, low-cost and large-size (for example, 40-inch) applications.

 Schematic of an active-matrix OLED display

An AMOLED display consists of an active matrix of OLED pixels that generate light (luminescence) upon electrical activation that have been deposited or integrated onto a thin-film-transistor (TFT) array, which functions as a series of switches to control the current flowing to each individual pixel. Typically, this continuous current flow is controlled by at least two TFTs at each pixel (to trigger the luminescence), with one TFT to start and stop the charging of a storage capacitor and the second to provide a voltagesource at the level needed to create a constant current…

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