Everything About LCD Monitor

Passive Display (TN, STN)
Passive matrix is the term when it used for computer screens and passive display when it used for small readouts, all the active electronics (transistors) are outside of the display screen. Passive displays have improved but do not provide a wide viewing angle. Types of passive displays are Twisted Nematic (TN with a 90º twist), Supertwisted Nematic (STN with a 180-270º twist) and Dual Scan STN.

Active Display (TFT)
Widely used for all LCD applications today (laptop and desktop computers, TVs, etc.). Known as active matrix displays, a transistor is used to control each subpixel on the screen to produce high definition resolutions. The active matrix provides a sharp, clear image with good contrast and eliminates submarining. Fabrication costs were originally higher than the passive matrix, which caused both types to be used in the early days of laptop flat panels. Active matrix displays use a 90º (TN) twist and known as thin film transistor-LCD (TFT LCD).

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