In-plane switching (IPS) LCD technology
Better viewing angle dependence
How IPS works
For IPS technology, the electrodes whose electrical fields are used to switch the LC molecules are found on only one of the two substrates in the form of strip electrodes. The result: an inhomogeneous electric field aligned parallel to the substrate surface in the first approximation. The molecules are switched accordingly in the substrate, thus “in-plane”. This creates much lower viewing angle dependence than in TN and VA displays. The improved viewing angle dependence, achieved without additional compensation film, is a key advantage of IPS technology, making it very attractive for many applications. A further feature of the IPS cell is the unique arrangement of electrodes and orientation layers.