TFT (Thin Film Transistor) is an active-matrix liquid crystal display that supports a full-color display. This display is characterized by high brightness, bright colors, and supports the display of fast animation, complex graphics, and various custom fonts. TFT is a perfect display product that can provide rich customer interfaces.
It is usually used in consumer electronic products, such as DVD players or handheld devices. It is also very suitable for various industrial applications.
The TFT display screen contains very tiny switching transistors and capacitive devices. These tiny switching transistors control every pixel in the display screen, and only need a small amount of energy to control the rotation direction of the liquid crystal. This will allow faster control of each red, green, and blue base point, resulting in clear, fast-moving color graphics.
The transistors in the TFT are arranged in a matrix on the substrate glass, and each pixel on the display screen will remain closed until the addressing command requires the state of the transistor to be changed.
Different from the traditional passive matrix display, in order to activate a specific pixel, the corresponding row will be opened first, and then the modified command will be sent to the appropriate column, where only the capacitor in each specific pixel receives the opened Command until the next refresh cycle.
Essentially, each transistor acts as an active switch. By adding an active switch, the number of scan lines can be limited and the crossover effect problem can be eliminated.
The main problem of the TN type TFT display is the small viewing angle, especially in the vertical direction.
If you look from the bottom to the top, you will clearly see that the picture will become very dark, even if it moves slightly, the contrast And the change of the color tone will also be clearly observed, which may be the main shortcoming of the current mainstream TN display. In recent years, some TN-type displays have better viewing angles than other products, but they still have a big gap with other display technologies.