随着科技的不断进步，影音系统在过去几十年中经历了引人注目的变革。从碟片播放机、硬盘播放机再到网络播放机、投影机和功放等影音系统，视频和音频质量、存储容量、传输速度、观看平台以及交互体验等方面都取得了巨大的进步，我们见证了影音技术的飞速发展，也享受着更加丰富多彩的娱乐体验。
英:STN has nematic LC which can twist from 180 degrees to 270 degrees or uses namatic LC display type. With a fixed angle， the straight polarizer shoots on to the axis of the LC molecule and because of the birefringence property， the straight polarizer becomes ellipse polarizer. By utilizing the existence of electrical field to control the LC molecule to stay in between the STN structure and vertical orientation， STN can be drove from the property of birefringence. Generally， they are in either yellow or blue color， and it can display white color when special phase film or compensated LC board. This also applies to color display. Comparing with TN， it has a wider viewing angle， but the disadvantage is slow in response speed.
