Introduction to TFT Display (TN Film) Technology
TFT (Thin Film Transistor) is an active matrix LCD display screen that supports full-color display The characteristics of this display screen are high brightness, bright colors, and support for displaying fast animations, complex graphics, and various cu
TFT (Thin Film Transistor) is an active matrix LCD display screen that supports full-color display. The characteristics of this display screen are high brightness, bright colors, and support for displaying fast animations, complex graphics, and various custom fonts. TFT is a perfect display product that can provide rich customer interfaces, usually used in consumer electronic products such as DVD players or handheld devices, and it is also very suitable for various industrial applications.
TFT display screens contain very small switching transistors and capacitors, which control every pixel inside the screen and can control the rotation direction of the liquid crystal with minimal energy consumption. This will allow for faster control of each red, green, and blue base point, resulting in clear, fast-moving color graphics.
The transistors inside the TFT are arranged in a matrix on the substrate glass, and each pixel point on the display screen will remain turned off until the addressing command requires a change in the transistor state. Unlike traditional passive matrix displays, in order to activate a specific pixel, the corresponding row will first be opened, and then the instruction to change will be dropped to the appropriate column, where only the capacitors in each specific pixel receive the opening instruction until the next refresh cycle. Essentially, each transistor acts as an active switch, and by adding an active switch, the number of scan lines can be limited and the problem of crosstalk can be eliminated.
The main problem with TN TFT display screens is the small viewing angle, especially in the vertical direction. If you look from bottom to top, you will clearly see that the image will become very dark, and even slight movements will result in noticeable changes in contrast and color tone. This may be the main drawback of mainstream TN display screens nowadays. In recent years, some TN display screens have better viewing angles than other products, but they still have a significant gap compared to other display technologies.
