tft screen advantages and disadvantages
The tft (thin film transistor), a thin film field effect transistor, is one of the active matrix liquid crystal displays. It can “actively” control each individual pixel on the screen, which can greatly improve the response time. General tft response time is relatively fast, about 80 milliseconds, and the viewing angle is large, generally can reach about 130 degrees, mainly used in high-end products. The so-called thin film field effect transistor means that each liquid crystal pixel point on the LCD is driven by a thin film transistor integrated in the back. tft belongs to the active matrix LCD, which technically adopts the “active matrix” method to drive, by using the thin film technology to make the electrode of the transistor, and using the scanning method to “actively pull “The light source is first transmitted upward through the lower polarizing plate when irradiated, and the light is conducted by the liquid crystal molecules to achieve the purpose of display through shading and light transmission.
Pros.
1. tft has good focusing performance. 2.
2. another technical advantage of tft over crt is that it does not produce geometric errors. 3.
3. tft screen does not flicker because it does not use the electron beam to scan every line on the screen.
Disadvantages.
1. Viewing angle is too small.
2. Slow response time.
The tft screen is not harmful to the eyes.
TFT in active matrix liquid crystal display, in the technology used zhuan active shu matrix way to drive, the method genus is the use of thin film technology made of electro crystal electrodes, the use of scanning method active pull control any one display point on and off, light source irradiation first through the lower polarizing plate upward transmission, with the help of liquid crystal molecules to conduct light, through shading and light transmission to achieve the purpose of the display.
TFT also improves the phenomenon that STN will flicker (water ripple) blur, effectively improving the ability to play dynamic images. Compared with STN TFT has excellent color saturation, reproduction ability and higher contrast ratio.
tft screen use precautions
1, the use of TFT LCD module design products, pay attention to the perspective of the liquid crystal and the design of the product use consistent with.
2, to prevent damage to the LCD glass, falling or hard object impact will cause the LCD screen rupture or shatter, especially the corners of the part is particularly fragile.
3, the surface of the LCD polarizer has a surface layer to inhibit reflection, must not scratch the surface, it is best to use transparent plastic material on the surface of the LCD to protect the screen.
4, if the LCD module storage below the specified temperature below, the liquid crystal material will condense performance will also be weakened. If the LCD module is stored above the specified temperature, the molecular arrangement direction of the liquid crystal material will change to liquid state and may not be able to recover to the original state. Exceeding the temperature and humidity range will cause the polarizer to peel or blister. Therefore, liquid crystal modules should be stored in the specified temperature range.
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