TFT liquid crystal display (Thin Film Transistor) refers to thin film transistor, that is, each liquid crystal pixel point is driven by a thin film transistor integrated behind the pixel point, so that it can achieve high speed, high brightness, high contrast, is currently one of the very good LCD color display device, its effect is close to the CRT monitor, is now the mainstream on notebook computers and desktop computers each pixel of TFT is controlled by the TFT integrated in itself, which is the active pixel point. Therefore, not only the speed can be greatly increased, but also the contrast and brightness are greatly improved, while the resolution also reaches a very high level.

TFT-LCD liquid crystal display is a thin film transistor type liquid crystal display, also known as "true color" (TFT).

TFT liquid crystal for each pixel is equipped with a semiconductor switch, each pixel can be directly controlled by point pulse, so each node is relatively independent, and can be continuously controlled, not only to improve the response speed of the display, and at the same time can accurately control the display color scale, so the TFT liquid crystal color more true. TFT for the thin film transistor active matrix liquid crystal display device. TFT liquid crystal display in each pixel point on the design of a field-effect switching tube, so that it is easy to achieve true color, high resolution liquid crystal display device. Nowadays, TFT-type LCDs generally achieve more than 18bit color (218 colors), and even reach 24bit color. In terms of resolution, the realization of VGA (640×480), SVGA (800×600), XGA (1024×768), SXGA (1280×1024), and even UXGA (1600×1200) have become a reality.

What are the advantages and disadvantages of TFT LCDs?

(1) Large Area: The first generation of large-area glass substrate (300mm × 400mm) TFT-LCD production line put into operation in the early nineties, by the first half of 2000, the area of the glass substrate has been expanded to 680mm × 880mm, nearly 950mm × 1200mm glass substrate will also be put into operation. 

(2) High Integration: 1.3-inch TFT chip for LCD projection resolution of XGA contains millions of pixels. Resolution of SXGA (1280 × 1024) of 16.1-inch TFT array non-crystalline silicon film thickness of only 50nm, as well as TABONGLASS and SYSTEMONGLASS technology, the integration of its IC, the requirements of equipment and supply technology, technical difficulties are more than the traditional LSI.

(3) Powerful: TFT as a matrix siting circuit to improve The optical valve characteristics of the liquid crystal. For high-resolution displays, precise control of the object element is achieved through voltage regulation in the range of 0-6V (its typical value of 0.2 to 4V), thus making it possible for LCDs to achieve high-quality, high-resolution displays.

(4) Low Cost: The glass substrate and plastic substrate fundamentally solve the cost problem of large-scale semiconductor integrated circuits, opening up a wide application space for the application of large-scale semiconductor integrated circuits.

(5) Process Flexibility: in addition to the use of sputtering, CVD (chemical vapor deposition) MCVD (molecular chemical vapor deposition) and other traditional processes into the film, laser annealing technology has also begun to apply, both to produce amorphous film, polycrystalline film, but also to manufacture single crystal film. Not only can make silicon film, but also other II-VI group and III-V group semiconductor films.

(6) Wide Range of Applications: TFT technology-based liquid crystal flat panel display is the pillar industry of the information society, and the technology can be applied to the rapidly growing thin-film transistors. SINDA focuses on industrial display, industrial-grade touch screen and optical lamination product development and manufacturing, and the products are widely used in medical equipment, industrial handheld terminals, Internet of things terminals and smart homes.