Many devices in our daily lives use LCD screens,, LCD stands for Liquid Crystal Display, which is a general term for liquid crystal display technology. According to the driving method, it can be divided into three types: static driving, simple matrix driving, and active matrix driving. According to the different rotation angles of liquid crystal molecules inside the liquid crystal cell, we divide the liquid crystal display Екранът в различни работни режими и различни режими на работа ще доведат до различни ефекти на дисплея, показани на екрана .
TN (Twisted Nematic) is a new liquid crystal material developed after DSM type liquid crystal materials. The emergence of TN laid the foundation for the main development of LCD today. Subsequent products such as HTN, STN, FSTN, DFSTN, etc. are all derived from TN. Their differences lie in the подреждане, ъгъл на усукване и аспекти на веригата на течния кристал .
TN,HTN,STN,FSTN,DFSTN, The structure is basically the same, TN is generally twisted at 90 degrees, HTN is twisted at 90-120 degrees, and STN is twisted at 180-270 degrees, FSTN,DFSTN, Both are STN, and STN LCD screens have yellow green mode, blue mode, gray mode, and so on depending на ъгъла на усукване и ъгъл на поляризиращата плоча; TN LCD screens have both positive and negative characteristics. FSTN and DFSTN have a black or white background appearance. FSTN is a film compensated STN, while DFSTN uses a dual FSTN structure to achieve black and white display.
Основната характеристика на VA течния кристал е, че неговите течни кристални молекули са подредени вертикално към стъкления субстрат, тоест при липса на напрежение, течните кристални молекули са подредени вертикално .