With the development of electronic products to the present, the user experience. More and more products will use LCD screens, and the display effect of the most important output devices on electronic products will directly affect the user experience. Today, we will give a general introduction to TFT-LCD technology:

　　Overview of TFT-LCD

　　TFT is the abbreviation of Thin Film Transistor. TFT LCD is a kind of active matrix type liquid crystal display (AM-LCD). Flat panel display, especially TFT-LCD, is the only display device that can fully catch up with and surpass CRT in brightness, contrast, power consumption, life, volume and weight. It has excellent performance, good mass production characteristics, high degree of automation, low cost of raw materials and broad development space. It will quickly become the mainstream product in the new century and a bright spot of global economic growth in the 21st century.

　　Main features of TFTFT-LCD

　　Different from TN technology, TFT display adopts "back-through" illumination mode-the imaginary light source path is not from top to bottom like TN liquid crystal, but from bottom to top. In this way, a special light pipe is arranged at the back of the liquid crystal, and the light source shines through the lower polarizing plate. As the upper and lower interlayer electrodes are changed into FET electrodes and common electrodes, when the FET electrodes are turned on, the performance of liquid crystal molecules will also change. The display can be achieved by shading and transmitting light, and the response time is greatly increased to about 80ms. TFT is commonly called "true color" because of its higher contrast, richer colors and faster screen update frequency than TN-LCD.　　Compared with DSTN, the main feature of TFT-LCD is to configure a semiconductor switching device for each pixel. Because each pixel can be directly controlled by dot pulse. Therefore, each node is relatively independent and can be continuously controlled. This design method not only improves the response speed of the display screen, but also can accurately control the display gray scale, which is why TFT color is more realistic than DSTN.

　　Main advantages of TFT-LCD

　　With the maturity of TFT technology in the early 1990s, color LCD flat panel displays developed rapidly. In less than 10 years, TFT-LCD quickly grew into the mainstream display, which is inseparable from its advantages. The main features are:

　  (1) good use characteristics

　　Low-voltage application, low driving voltage and improved safety and reliability of solid use; Flat, thin and light, saving a lot of raw materials and use space; Low power consumption, its power consumption is about one tenth of that of CRT display, and that of reflective TFT-LCD is only about one percent of that of CRT, which saves a lot of energy. TFT-LCD products also have many characteristics, such as specifications, serial sizes, various varieties, convenient and flexible use, easy maintenance, update and upgrade, long service life and so on. The display range covers the application range of all displays ranging from 1 inch to 40 inches and the large projection plane, which is a full-size display terminal; The display quality ranges from the simplest monochrome character graphics to various specifications of video displays with high resolution, high color fidelity, high brightness, high contrast and high response speed; The display modes are direct view, projection, perspective and reflection.

　　(2) Good environmental protection characteristics.

　　No radiation, no flicker, no harm to the health of users. Especially, the appearance of TFT-LCD electronic books and periodicals will bring human beings into the era of paperless office and paperless printing, and trigger the revolution of human learning, spreading and recording civilization.

　　(3) wide application range It can be used normally in the temperature range from -20℃ to+50℃, and the low-temperature working temperature of TFT-LCD after temperature strengthening can reach-80℃. It can be used as a mobile terminal display, a desktop terminal display, and a large-screen projection TV. It is a full-size video display terminal with excellent performance. 

      (4) The automation degree of manufacturing technology is high. Large-scale industrial production has good characteristics. TFT-LCD industry technology is mature, and the yield of mass production is over 90%. 

       (5)TFT-LCD is easy to integrate and update. It is the perfect combination of large-scale semiconductor integrated circuit technology and light source technology, and has great potential for further development. At present, there are amorphous, polycrystalline and monocrystalline silicon TFT-LCD. In the future, there will be other TFT materials, including glass substrates and plastic substrates. TFT Process (thin film transistor process)  1. Array Process (array process)