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In-plane switching (IPS) LCD technology

Its arrangement of electrodes and orientation layers helps IPS point the way towards better viewing angle dependence.


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.

Explore IPS with the LCD Explorer

Schematic illustrating IPS switching mode Schematic illustrating IPS switching mode
IPS switching mode

In IPS technology, the liquid crystals are arranged horizontally, i.e. parallel to the glass plates. When voltage is applied, they rotate by 90°in the same plane on the same level.

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