Power Supply Sequencing

Abstract

Passive matrix and active matrix liquid crystal displays require sequencing of their power supply rails. This is required to avoid image artifacts and possible malfunctions of the integrated circuits, like row and source driver as well as timing controller. While the sequencing for the passive matrix displays is simple and straightforward, the active matrix TFT LCD requires a more dedicated sequencing. This sequencing depends mainly on the panel and is slightly different for each panel manufacturer. In this short chapter the main sequencing requirements are discussed.