AMOLED – active-matrix organic light-emitting diode

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. Researchers at DuPont used FLOW-3D from Flow Science, Inc., a computational fluid dynamics (CFD) software that simulates various physical flow processes, to optimize coating processes for a new solution-coated AMOLED display technology that is cost and performance competitive with existing commercial vapor deposition technology. Using custom modeling and analytical approaches, they developed short- and long-range film-thickness control and uniformity that is commercially viable at large glass sizes.

Active-matrix OLED displays provide higher refresh rates than their passive-matrix OLED counterparts, and they consume significantly lesspower. This advantage makes active-matrix OLEDs well suited for portable electronics, where power consumption is critical to battery life.

The disadvantage however is AMOLED displays may be difficult to view in direct sunlight compared to LCDs.Samsung’s Super AMOLED technology addresses this issue by reducing the size of gaps between layers of the screen. The organic materials used in AMOLED displays are prone to degradation over a period of time. However, technology has been developed to compensate for material degradation.
Current demand for AMOLED screens is high and due to supply shortages of the Samsung-produced displays, certain models of HTC smartphones have been changed to use Sony’s SLCD displays in the future.


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