When buying a monitor, TV or cell phone, it is normal to be bombarded by several acronyms for different technologies.TFT is part of this select group that can generate doubts and comparisons between the quality of TFT and LCD screens.However, do these comparisons make sense?Understand what TFT is, its relationship with LCD and the differences linked to the variations of this technology.TFT LCD stands for "Thin Film Transistor Liquid Crystal Display".In Portuguese, it would be something like "Liquid crystal display based on thin film transistors".LCD screens use "liquid crystals", transparent materials located inside that become opaque when receiving an electrical current.As liquid crystals do not emit light, the devices use a feature called backlight, a white light located behind the screen that allows the display to shine so we can see images.The TFT technology present in LCD panels uses layers of transistor films on a glass substrate.These screens are made up of pixels in the colors: Red, Green, and Blue (the RGB standard).In screens with TFT, each transistor is responsible for controlling the electric field, through the three liquid crystal capacitors in red, green and blue colors to regulate the polarization of the material.The degree of polarization of the crystal determines how much light from the backlight hits the color filter.Because of this ability to quickly and directly control each pixel individually, TFT is also called active matrix LCD technology.Screens with TFT technology are usually cheaper to produce, something that guarantees their popularity.Another outstanding aspect is its durability in relation to technologies such as AMOLED that use organic materials and degrade faster.TFT is not a new LCD technology, but a type of semiconductor used in various technologies present in LCD panels.Therefore, it makes no sense to say that an IPS LCD screen is better than a TFT: it would be like saying "Ubuntu is worse than Linux".In fact, TFT is a very broad technique that can even be leveraged on AMOLED panels.Just knowing that a panel is TFT is not an indication of its quality.TFT aSi is the oldest TFT technology in which transistors are made of amorphous silicon, which do not have a certain range order and form a random network.Its low production cost allows great production scalability, being widely used in equipment of any size.LTPS or Low Temperature Polysilicon is an upgrade of amorphous silicon.Its production process is more complex, requires higher processing temperatures, and is more expensive.As a result, LTPS has electrons 50 times faster than those found in aSi.Okay, that doesn't say much.However, bringing it to the real world means it is possible to produce smaller TFTs, yielding higher resolution, brighter displays and faster refresh rates.Due to its higher cost, this type of TFT is often used in smaller equipment.IGZO is a newer technology of transistors coming from the combination of elements such as indium, gallium, zinc and oxygen.This technology is licensed by Samsung and Sharp.Although not a completely new technology, one of its main features is to deliver colors as faithful and vibrant as aSi panels, but with much greater energy savings.The downside, at least for now, is its production cost much higher than other TFT categories, due to the use of rarer metals such as indium and gallium.This type of transistor can also be applied to panels.IPS, VA, TN and OLED.IPS, VA and TN are very popular LCD panel technologies that can confuse our minds a little when choosing a monitor or TV, so we've put together a text that helps clarify the differences between IPS, VA and TN.This is not a dispute, as TFT is a semiconductor technology used in displays with LCD panels.With information: Sharp, Samsung, Display NinjaWhat is TFT used in cell phone screens, monitors and TVs?