横向电场效应显示技术（英语：In-Plane-Switching Liquid Crystal，简称：英语：In-Plane Switching，缩写：IPS）为日立制作所于1996年开发的LCD广视角技术，被广泛的使用在液晶电视及平板电脑的制造上，能有效改善当视角差时，在TN屏幕上出现的色差及其他问题。

现在大屏幕液晶电视市场上，VA液晶占83%的份额，IPS液晶占17%份额，而IPS液晶在电脑显示器市场的比重大于VA液晶，是当今液晶技术的两大主流。

目前IPS液晶的主要生产厂家有日立、松下、东芝、三菱电机和LG等。

IPS (In-plane switching) is a screen technology for liquid crystal displays (LCDs). It was designed to solve the main limitations of the twisted nematic field effect (TN) matrix LCDs in the late 1980s. These limitations included strong viewing angle dependence and low-quality colour reproduction. In-plane switching involves arranging and switching the orientation of the molecules of the liquid crystal (LC) layer between the glass substrates. This is done, essentially, parallel to these glass plates.