An IPS monitor uses what is known as in-plane switching, a type of LCD or liquid crystal display technology. IPS technology was developed as an improvement on early TFT, or thin-film transistor, screens.
IPS technology offers better color display and viewing angles by manipulating light-transmissive characteristics. An electrical field is passed through each end of the crystal molecules which are aligned horizontally rather than vertically. The crystals are maintained in a position parallel to the glass substrate of the screen and move to their position of alignment.
The result is better color reproduction. Typically, IPS screens also feature a higher maximum level of brightness and the lowest level of blacks out of all the screen technology options.