Character LCD Modules screen features TFT-LCD research

As the technology matures early nineties TFT color LCD flat panel displays rapid development, less than 10 years, TFT-LCD screen display rapid growth of the mainstream, which has the advantage that it is inseparable. The main features are:

A wide scope
The temperature range from -20 ℃ to +50 ℃ can be used normally after TFT-LCD liquid crystal display cryogenic temperature reinforcement operating temperature can reach minus 80 ℃. Can be used as a mobile terminal display, desktop terminal display, and can be used for large-screen projection TV is an excellent performance of the full-size video display terminal.

Second, good use of properties
Low display range covers from 1-40 inches wide range of applications as well as all displays large projection plane, is a full-size display terminal; display quality from the most simple monochrome character graphics to high resolution, high color fidelity , high brightness, high contrast, high response speed of various models of video display; display has direct-projection type, see-through, but also reflective. Voltage applications, low driving voltage, solid use of improved security and reliability; flat-panel technology, but also light, save a lot of raw materials and the use of space; low power, its power consumption is about one-tenth of CRT monitors, reflection type TFT-LCD or CRT only about one percent, saving a lot of energy; TFT-LCD LCD screen products as well as specifications, dimensions serialization and varied, flexible and easy to use, maintenance, updates, upgrades easy to use long life and many other features.

Third, the high degree of automation of manufacturing technology
Large-scale industrial production characteristics of a good. TFT-LC D LCD technology is mature industry, large-scale production yield of over 90%.

Fourth, good environmental characteristics
No radiation, no flicker, no damage to the health of users. Particularly TFT-LCD electronic books appeared, will mankind into a paperless office, paperless printing era, triggered the revolution of human learning, communication and records civilized manner.

Five, TFT-LCD ease of integration and upgrading
There are amorphous, polycrystalline and monocrystalline silicon TFT-LCD LCD, TFT future there will be other materials, both glass substrates have a plastic substrate. Large-scale integrated circuit technology and semiconductor light source technology the perfect combination of great potential for continued development.


Developing fast, stable core technology

Manufacturing, advanced production technology, new materials development, large-scale production equipment, will drive the upstream industries. TFT-LCD module is the core component of the information industry, involving almost all the areas of communications, transportation, household appliances, computers, education, industrial, medical, defense and so on. TFT-LCD production line decades of industrialization experienced seven major development, an average of one and a half years of production line will be updated. However, the core technology of TFT-LCD is relatively stable. Wide-driven industries face, has global significance for the national economy: Raw materials, production equipment, production technology involves dozens of areas of modern industrial production.

On a large area of ​​glass or plastic substrate manufacturing control cell (LC or OLED) switching performance than in silicon TFT greater technical difficulty scale manufacturing of IC. Requirements of the production environment (degree of purification of 100), the purity of raw materials requirements (electronic special gas purity 99.999985%), production equipment and production technology requirements are more than large-scale integrated semiconductor, is a modern large-scale production of the top technology. The technical characteristics of TFT TFT technology is developed in the 1990s, the use of new materials and new technology of large-scale semiconductor integrated circuit manufacturing technology the whole, is a liquid crystal (LC), inorganic and organic thin film electroluminescent (EL and OEL ) flat panel displays foundation. TFT is on a non-single-chip glass or plastic substrate (of course also be performed on the wafer) to form a variety of film manufacture circuits required by sputtering, chemical deposition process, through large-scale manufacture of film semiconductor integrated circuit (LSIC) . Use of non-single crystal substrate can greatly reduce the cost, is an extension of the traditional LSI to a large area, multi-purpose, low-cost direction. Its main features are:

A powerful
Now people began to drive IC integrated into the glass substrate, the entire TFT function more powerful, which is the traditional large-scale semiconductor integrated circuit unmatched. As the first site circuit matrix TFT liquid crystal light valve to improve the properties. For high-resolution displays, via 0-6V range of voltage regulator (the typical value of 0.2 to 4V), to achieve a precise control of the target element, so that the LCD screen to achieve high-quality high-resolution display possible. TFT-LCD is a human history over the CRT display quality in a flat panel display.

Second, a large area
The first generation of the early nineties large area glass substrates (300mm × 400mm) TFT-LCD LCD production line, the first half of 2000 has been expanded area glass substrates to 680mm × 880mm), which is expected to start in 2009 in Japan SHARP investing in Osaka 10 generation line glass substrate size reached 2880mmX3080mm, the size of the glass panels can be cut 15 42-inch lcd graphic display TV.

Third, the wide range of applications
With technology-based LCD TFT flat panel display industry is the backbone of the information society, and technology can be applied to the rapidly growing organic electroluminescent thin film transistor (TFT-OLED) flat panel displays are also rapidly growing.

Fourth, the process flexible
In addition to sputtering, other than the CVD (chemical vapor deposition) MCVD (molecular chemical vapor deposition) and other conventional deposition processes, have begun to use the laser annealing technique, can produce both an amorphous film, a polycrystalline film, single-crystal film can be manufactured. Not only can produce silicon film, you can also make other Ⅱ - Ⅵ family and Ⅲ - Ⅴ semiconductor film.

Five, low-cost
Glass substrate and a plastic substrate from the fundamental solution to the problem of the cost of large-scale semiconductor integrated circuit, semiconductor integrated circuits for large-scale applications to develop a broad application space.

Sixth, the high level of integration
For 1.3 inch TFT liquid crystal projector with a resolution of XGA chip containing one million pixels. Resolution of SXGA (1280 × 1024) of the thickness of the amorphous silicon TFT array is only 16.1 inches 50nm, and TABONGLASS and SYSTEMONGLASS technology, integration of the IC,TFT Display Module supply of the required equipment and technology, the technical difficulty is more than the traditional LSI.