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Do you know TFT LCD display?

Views: 219     Author: Wendy     Publish Time: 2023-06-06      Origin: Site


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Do you know TFT LCD display?

A TFT LCD display, also known as a thin-film transistor liquid crystal display, is a form of LCD display that employs thin-film transistor technology to enhance image quality.

TFT LCD screens are superior than conventional LCD displays in many ways. TFT LCDs employ a thin film of transistors instead of the single layer of transistors used in conventional LCDs. Better image quality, faster response times, and less power usage are all made possible as a result. TFT LCDs are perfect for usage in portable devices since they are lighter and thinner than conventional LCDs.

The viewing angle and color reproduction should both be taken into account when selecting a TFT LCD. TFT IPS screens cost more even if they have greater image quality.

To find out more about TFT LCD screens, their different uses, and how they operate, keep reading.

How Do TFT LCDs Work?

The transistor array and the color filter array are the two major components that make up TFT LCDs.

The layer of transistors constructed from a substance like silicon is known as a thin-film transistor array. The control circuitry is linked to the array of transistors. The drivers that regulate the voltage provided to the transistors are part of the control circuitry.

The layer of the LCD that houses the color filters is called the color filter array. The pigments or dyes used to create the color filters are organized in a precise pattern. The most popular patterns are CMYK (cyan, magenta, yellow, black) and RGB (red, green, blue).

The transistors in the transistor array switch on when a voltage is provided, allowing light to flow through. The color filter array then transforms this light into a picture.

TFT LCD display applications

Consumer electronics, computers, telecommunications, automotive, and medical are just a handful of the industries that employ TFT LCDs. In particular, they are utilized in:

Laptop computers and computers


Mobile devices

cellular devices and tablets

gaming consoles

electronic cameras

cellular media players

GPS units

Medical and industrial equipment

What Constitutes a TFT Display Module's Major Components?

A typical TFT display module has numerous components in addition to the thin-film transistor array and the color filter array.

Layer of Liquid Crystal

The LCD's liquid crystal layer is where the liquid crystals are located. Nematic or cholesteric materials, for example, are used to create the liquid crystals.

A precise design is used to organize the liquid crystals. Twist nematic (TN), super twisted nematic (STN), and in-plane switching (IPS) are the most prevalent designs. The voltage provided to the electrodes determines how the liquid crystals will align with the electric field.

When an electric field is applied, the liquid crystals twist. This twisting allows light of a specific color to pass through. The light is then modulated by the liquid crystal layer.

Protect glass

The cover glass offers a surface on which the user may interact with the display while safeguarding the LCD from harm.

Two types of cover glass are used in TFT LCDs. Soda-lime glass or Gorilla Glass is used to make rigid cover glass. Some TFT LCDs, like those seen in smartphones, feature flexible cover glass. Because it is less likely to break than rigid cover glass, flexible cover glass is the best choice for usage in portable devices.

LED backlight

The layer of the LCD that emits light is called the backlight. External electrode fluorescent lamps (EEFLs), electroluminescent panels (ELPs), cold cathode fluorescent lamps (CCFLs), hot cathode fluorescent lamps (HCFLs), and light-emitting diodes (LEDs) can all be used as backlights.

Smaller screens are most frequently equipped with backlights to improve their visibility in low light.


The display module's touchscreen, an optional component that enables user interaction with the display, is used. A touchscreen is a sheet of glass that has a pressure-sensitive coating on it. The pressure applied by the user to the touchscreen is detected and translated into an electrical signal.

There are several different kinds of touchscreens, including capacitive, resistive, and surface acoustic wave touchscreens.


Another display module component that is optional is the bezel. It serves to safeguard the display module from harm.

IC driver

Driving the TFT LCD screen is done by the driver IC. It transforms digital impulses into analog signals that the TFT LCD screen may utilize.




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