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Difference between TFT and LCD

Recently, I read about a German article, which explains the difference between TFT (Thin Film Transistor) and LCD (Liquid Crystal Displays) and I found it interesting. This led me to write a short article about this topic for my users too.


For digital photo frames, TFT and LCD are often used synonymously, but in fact, there is a difference between these two panels. Generally speaking, TFT is one kind of LCD. Older LCD monitors (passive matrix structure) do not use an active matrix structure, like new LCD/TFT monitors use. Active-matrix addressed displays look brighter and sharper than passive-matrix addressed displays of the same size, and generally have quicker response times, producing much better images. Therefore, it can be concluded that TFT LCD are better than "normal" LCD displays and it is recommended to buy digital photo frames with TFT LCD.


This article was written by the webmaster of this site, Digital Photo Frame Market, Hannes Mungenast on 24 April 2008.


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Additional information

A thin film transistor liquid crystal display (TFT-LCD) is a variant of liquid crystal display (LCD) which uses thin film transistor (TFT) technology to improve image quality. TFT LCD is one type of active matrix LCD, though it is usually synonymous with LCD. High-resolution color displays such as modern LCD computer monitors and televisions use an active matrix structure. A matrix of thin-film transistors (TFTs) is added to the polarizing and color filters. Each pixel has its own dedicated transistor, allowing each column line to access one pixel. When a row line is activated, all of the column lines are connected to a row of pixels and the correct voltage is driven onto all of the column lines. The row line is then deactivated and the next row line is activated. All of the row lines are activated in sequence during a refresh operation.

Source: Wikipedia



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