Features of TFT display

TFT is refers to the thin film transistor, meaning each LCD pixels is integrated in the thin film transistor to drive behind the pixels, which can achieve high speed, high brightness, high contrast display screen information, is one of the best LCD color display device, the effect is close to the CRT monitor, is now using in automotive, medical, military and other industrial mainstream display device.Next, let us understand what is TFT LCD screen and its characteristics together with Dinsen Display!

What is a TFT LCD

TFT (Thin Film Transistor) refers to the Thin Film Transistor, which means each LCD pixels is by the integration of the Thin Film Transistor to drive behind the pixels, which can achieve high speed, high brightness, high contrast display screen information, is one of the best LCD color display device, the effect is close to the CRT monitor, is now the mainstream on the laptop and desktop display device.Each pixel of the TFT is controlled by a TFT integrated on itself and is an active pixel.Therefore, not only the speed can be greatly improved, but also the contrast and brightness are greatly improved, and the resolution has reached a very high level.

TFT-LCD is a thin film transistor type LCD, or “true color” (TFT).TFT liquid crystal is equipped with a semiconductor switch for each pixel, each pixel can be directly controlled by point pulse, so each node is relatively independent and can be continuously controlled, which not only improves the reaction speed of the display screen, but also can accurately control the display color level, so the color of TFT liquid crystal is more true.

TFT is a thin film transistor active matrix liquid crystal display device.The design of a field-effect switch tube on each pixel of TFT LCD makes it easy to realize true color, high resolution LCD display devices.At present, TFT liquid crystal has generally achieved more than 18bit color (218 color), or even up to 24bit color;In terms of resolution, VGA(640×480), SVGA(800×600), XGA(1024×768), SXGA (1280×1024) and even UXGA(1600×1200) have become reality.

TFT LCD features

(1) large area: 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×880mm). Recently, 950mm×1200mm glass substrate will be put into operation.

(2) high integration: the 1.3-inch TFT chip used for LCD projection has a resolution of XGA containing millions of pixels.The film thickness of 16.1-inch TFT array amorphous silicon with resolution of SXGA(1280×1024) is only 50nm, as well as the TABONGLASS and SYSTEMONGLASS technologies. Its IC integration, requirements for equipment and supply technologies, and technical difficulties are all higher than traditional LSI.

(3) powerful function: TFT was first used as a matrix location circuit to improve the characteristics of liquid crystal optical valve.For high-resolution displays, precise control of the object element is achieved by voltage regulation in the 0-6v range (its typical value is 0.2 to 4V), which makes it possible for LCD to achieve high-quality high-resolution display.

(4) low cost: glass and plastic substrates fundamentally solve the cost problem of large-scale semiconductor integrated circuits and open up a wide application space for large-scale semiconductor integrated circuits.

(5) flexible process: in addition to the traditional process of film formation, such as sputtering, CVD(chemical vapor deposition), MCVD(molecular chemical vapor deposition), laser annealing technology has also been applied, which can be used to make both amorphous and polycrystalline films and single crystal films.Not only can make silicon membrane, also can make other Ⅱ – Ⅵ and Ⅲ – Ⅴ semiconductor thin film.

(6) it has a wide range of application fields. The LCD panel display based on TFT technology is the pillar industry of the information society, and the technology can also be applied to the rapidly growing thin-film transistor organic luminescence (tft-oled) panel display.