Active-matrix OLED (Active-matrix organic light-emitting diode or AMOLED) is a display technology for use in mobile devices and televisions. OLED describes a specific type of thin film display technology in which organic compounds form the electroluminescent material, and active matrix refers to the technology behind the addressing of pixels.
An AMOLED display is a matrix of OLED pixels that emits light upon electrical activation that have been deposited or integrated onto a thin film transistor (TFT).
Typically, this continuous current flow is controlled by at least two TFTs at each pixel, one to start and stop the charging of a storage capacitor and the second to provide a voltage source at the level needed to create a constant current to the pixel and eliminating need for the very high currents required for passive matrix OLED operation.
TFT backplane technology is crucial in the fabrication of AMOLED displays. Two primary TFT backplane technologies, namely polycrystalline silicon (poly-Si) and amorphous silicon (a-Si), are used today in AMOLEDs. These technologies offer the potential for fabricating the active matrix backplanes at low temperatures (below 150°C) directly onto flexible plastic substrates for producing flexible AMOLED displays.
Super AMOLED Vs TFT
The Super AMOLED offers much brighter, clearer, and less reflective AMOLED On-Cell (Samsung has placed a touch-sensor over the display and made it evaporate. The thickness of the touch sensor is just 0.001mm this allows the screen to provide better images and to have great visibility even in direct sunlight) display, featuring a high resolution WVGA (800×480 pixels) screen with mDNIe (mobile Digital Natural Image engine) technology. DNIe technology is proven display technology which incorporated to Samsung’s LCD TV and LED TV lineups. With a free viewing angle and super fast response, the Samsung Wave display provides superb image quality for viewing both videos and photos. Samsung suggested that this new Super OLED is five times more vivid than regular and performs 20 percent better when it is used outdoor.
A typical OLED Cell
AMOLED Under microscope