TFT Active Matrix:

A thin-film transistor (TFT) panel is an active matrix display containing a microscopic thin-film transistor in the corner of each pixel. These transistors are formed by an etching process very similar to that used to fabricate semiconductors. Active matrix panels are better suited to the handling of high-quality data and video than passive (or simple) matrix panels because problems with cross-talk and contrast do not arise, even if the panel has a very high pixel count.

A TFT LCD panel contains a specific number of unit pixels often called subpixels. Each unit pixel has a TFT, a pixel electrode (IT0), and a storage capacitor (Cs). For example, an SVGA color TFT LCD panel has total of 800x3x600, or 1,440,000, unit pixels.
Each unit pixel is connected to one of the gate bus-lines and one of the data bus-lines in a 3mxn matrix format. The matrix is 2400x600 for SVGA.

This type of LCD commonly used in laptop computers, cameras, LCD projection panels that were produced since the late'80s and the early 90s. A typical screen active matrix TFT is a single pane of glass LCD, which controls the three primary colors. TFT screens are sometimes called active matrix LCDs.

Most LCD panels used in projectors today are made of High Temperature Poly-Silicon (HTPS) which has an active matrix and is transmissive. HTPS panels are superior in that they are smaller, have higher resolution and higher contrast, and can embed drivers.

The main function of HTPS is to act as a light valve for projectors. HTPS has a thin-film transistor (TFT) generated by poly-silicon in each pixel.

The TFT technology provides the best resolution, a larger viewing angle, quicker response time and more color saturation of all the flat-panel techniques, but it is also the most expensive. 3LCD technology uses active matrix LCDs.