Alternatively referred to as Thin Film Transistor (TFT) and Active-matrix LCD (AMLCD), an active-matrix display is a liquid crystal display (LCD) introduced with the IBM ThinkPad in 1992. With Active-matrix displays, each pixel is controlled by one to four transistors which can make the screen brighter and more colorful than passive-matrix displays. Active-matrix displays also update the screen faster than passive-matrix and are capable of being viewed at a greater viewing angle. Because of this improved technology, active-matrix screens are often more expensive than their passive-matrix counterparts.
While active-matrix displays do have a crisp picture because each pixel has a transistor, they consume more power when running off of a battery. Also, because of the number of transistors, there is more of an opportunity for dead pixels.
In conclusion, the active-matrix may have disadvantages like any technology. However, is still recommended by most over the dual-scan technology.