STN ( very complex ) some sort of display technology flat panel LCD ( liquid crystal display ). CSTN means very complex color . Every two words, to a screen type color LCD refers . STN compared to TFT technology, the force is less and the cost is less, but the price, the image quality and response time . Technology STN is a technology matrix - A is disabled, i.e., every pixel in every H should read the lot separately strengthened . To do this, the liquid crystal should be enough space, quiet, reaction, gives, status, renewal of forces to maintain . This is the time of reaction is relatively slow, and the brightness and color difference to be limited.