In modern household appliances, elements such as TFT screens are massively used. They can be found in various types of devices: computer displays, screens of cell phones, tablets, ATMs, as well as in many other devices. What is this technology, what are its advantages? In this article, we will analyze what TFT screens are, their types and advantages.
Thin-film transistor (TFT), which is translated from English as a thin - film transistor. These elements are made of a thin film 0.1-0.01 microns thick. For most people, LCD monitors are associated with flat screens in televisions, laptops, camcorders, etc. Modern TFT screens are characterized by a robust construction, high brightness, and the ability to work in a wide temperature range. Using the described technology allowed to reduce the weight, overall dimensions and power consumption of the equipment.
The first liquid crystal matrices appeared in 1972. Since then, these technologies have developed and changed significantly. Today, there are many types of TFT monitors :
- TN TFT - This type of TFT color screen (the first technology to hit the liquid crystal display market) is cheap. The disadvantages include color distortion, low image contrast, very bright and noticeable “broken” pixels.
- Super Fine TFT, these TFT-screens are characterized by a maximum viewing angle (170 degrees), as well as high color rendering, response time is 25 ms, “broken” pixels are black, respectively, not so noticeable.
- Super IPS, Advansed SFT - have a bright, high-contrast image, there are practically no color distortions, the viewing angle has been increased, and the image has high definition.
- UA-IPS, UA-SFT - has a low level of distortion of the transmitted image from different angles. These displays are characterized by increased panel transparency and expanded color gamut at a high level of brightness.
- MVA, the main advantage of this technology is the minimum reaction time, as well as a high level of contrast. The disadvantages include high cost.
- PVA - vertical microstructural placement of the LCD.
The continuous development of TFT-technologies has significantly reduced the cost of production of such displays. An important factor in the wide distribution of active matrices in industry was the ease of manufacture. Today, the touch screen (TFT) is an everyday occurrence, and twenty years ago, it was "expensive exotic." The appearance of touch displays was preceded by the appearance of models capable of working in harsh operating conditions. The result was the development of a TFT monitor, which combined a means of displaying visual information, as well as a data input tool (keyboard). The operability of such a system is provided by the serial interface controller. PIC controllers are used to control and decode signals from the sensor, as well as to suppress "bounce", they are able to provide high speed, as well as the accuracy of determining touch points.
In conclusion, we say that TFT-technology almost completely replaced tube monitors. Today, TFT displays are no longer a luxury, but a natural phenomenon.