LCD Liquid Crystal Display, Chinese multi-name "LCD Plane Display" or "LCD Display". The working principle is to utilize the physical properties of the liquid crystal: arranged in an order in power-on, making the light easy to pass; it is arranged in chaos, preventing the light from passing, saying that the simple point is to block the liquid crystal such as a gate or let the light penetrate. Common liquid crystal displays are divided into four physical structures: (1) TN-Twisted Nematic; (2) Super distortion to column type (STN-Super TN); (3) Double super distortion Dstn-Dual Scan Tortuosity Nomography; (4) TFT-Thin Film Transistor. The TFT - ThinfilmTransistor thin film transistor is one of the active matrix type liquid crystal display AM-LCD, and the TFT sets a special light pipe in the back of the liquid crystal, and "proactive" can control each individual pixel on the screen, which is The so-called proactive matrix TFT (ActiveMatrixTft) can be greatly improved, and the reaction time of general TFT is faster, about 80 ms, and STN is 200ms, and if it is necessary to increase, there is a flashing phenomenon. Moreover, since the TFT is the active matrix LCD, the arrangement of the liquid crystal has a memory, and it is not immediately restored immediately after the current disappears. TFT also improves STN flashing (water ripple) - blurred phenomenon effectively improves the ability to play dynamic pictures. Compared with STN, TFT has excellent color saturation, restore capacity and higher contrast, but the disadvantage is to consume power, and cost is also relatively high. The type of liquid crystal display (based on physical structure) The LCD can be divided into a dual-scan passive array display (DSTN-LCD) and a thin film transistor active array display (TFT-LCD) according to the physical structure. Fast DSTN (HPA), performance is bound to both. Specific parameters are compared to see Table 1. Type reaction time (ms) Contrast angle DSTN 300 25: 1 20 degrees HPA 150 35: 1 25 degree TFT 80 100: 1 45 Dimensional table 1 Technical parameters of several LCD display types Compare DSTN (Dual Scan Tortuosity Nomograph) Double Scan Disming Arrays It is a dual scanning method to scan a twisted column liquid crystal display to achieve the purpose of the display. DSTN is developed by the over-twisting to the column display (STN), since DSTN uses dual scanning techniques, the display effect is greatly improved compared to STN. The laptop is mainly used to use STN, followed by DSTN. The reaction time of STN and DSTN is slow, generally about 300 ms. From the perspective of the liquid crystal display, the principle of STN is to change the arrangement of liquid crystal molecules twisted by 180 degrees or more to change the rotational state, and the external electric field changes the electric field by progressive scanning, and the electric field repeatedly changes the voltage during the electric field. The recovery process of every point is slower, and thus, it will produce a fierce phenomenon. Users can feel the tail (Yu Hui), which is generally known as "pseudo".
