Tft lcd vs amoled.Apple system tft chooses which server is not jammed. Today, with the rapid development of smart phones, the editor believes that many netizens are no stranger to the word TFT, and they will see it in the mobile phone parameters more or less.

The full name of TFT is Thin Film Transistor (thin film field effect transistor), which means that every liquid crystal pixel on the LCD is driven by the thin film transistor integrated behind it, so that the screen information can be displayed with high speed, high brightness and high contrast. TFT belongs to active matrix liquid crystal display, and TFT-LCD (thin film transistor liquid crystal display) is one of most liquid crystal displays.

TFT sets up a special light tube on the back of the LCD, which can be “active” to control each independent pixel on the screen, which is the origin of the so-called active matrix TFT (activematrixTFT), which can greatly improve the reaction time, the reaction time of general TFT is faster, about 80ms, and STN is 200ms, if you want to improve, there will be flicker. And because TFT is an active matrix LCD can make the arrangement of liquid crystals memorable and will not return to its original state immediately after the current disappears.

The TFT display uses “back-to-back” illumination-the hypothetical light source path is not from the top to the bottom like the TN liquid crystal, but from the bottom up. In this way, a special light tube is arranged on the back of the liquid crystal, and the light source is illuminated upward through the lower polarizer. Because the electrodes of the upper and lower interlayers are changed into FET electrodes and common electrodes, the performance of liquid crystal molecules will also change when the FET electrodes are turned on, and the display can be achieved by shading and transmitting light. The response time is greatly increased to about 80ms, because it has higher contrast and richer colors than TN-LCD. Screen updates are also faster, so TFT is commonly known as “True Color”.

Compared with DSTN, the main feature of TFT-LCD is to configure a semiconductor switch device for each pixel. Because each pixel can be directly controlled by a point pulse. Therefore, each node is relatively independent and can be controlled continuously. This design method not only improves the reaction speed of the display screen, but also accurately controls the display grayscale, which is why the color of TFT is more realistic than that of DSTN.

TFT also improves the blurring of STN flicker (water ripple) and effectively improves the ability to play dynamic pictures. Compared with STN, TFT has excellent color saturation, restoration ability and higher contrast, but the disadvantage is that it consumes more power and costs more.

TFT technology is a large-scale semiconductor all-integrated circuit manufacturing technology developed in the 1990s, which adopts new materials and new processes. It is the basis of liquid crystal (LC), inorganic and organic thin film electroluminescent (EL and OEL) flat panel displays. TFT is on the glass or plastic substrate and other non-single wafer (of course, can also be on the wafer) through sputtering, chemical deposition process to form a variety of films necessary for manufacturing circuits, through the processing of films to produce large-scale semiconductor integrated circuits (LSIC). The use of non-single crystal substrate can greatly reduce the cost, which is the extension of traditional large-scale integrated circuits to large area, multi-function and low cost. It is more difficult to make a TFT on a large area glass or plastic substrate that controls the performance of a pixel (LC or OLED) switch than a large-scale IC on a silicon wafer. The requirements for the production environment (purification degree is 100), the purity of raw materials (the purity of electronic special gas is 99.999985%), and the requirements for production equipment and production technology all exceed the requirements of large-scale integration of semiconductors, which is the top technology of modern large-scale production. Its main features are as follows:

In the early 1990s, the first generation of large area glass substrate (300mm × 400mm) TFT-LCD production line was put into production, and by the first half of 2000, the area of glass substrate has been expanded to 680mm×880 mm). Recently, 950mm × 1200mm glass substrate will also be put into operation. In principle, there is no area limit.

The 1.3in TFT chip used for LCD projection has a resolution of XGA containing millions of pixels. The film thickness of the 16.1 inch TFT array amorphous silicon with a resolution of SXGA (1280 × 1024) is only 50nm, as well as TAB ON GLASS and SYSTEM ON GLASS technology. The IC integration, equipment and supply technology requirements are more difficult than the traditional LSI.