Patent ID: 6525703
Filing Date: 2003-02-25
Classification: G09G

Abstract:
Control process for addressing an AC plasma panel comprising at least one network of line electrodes, crossed with at least one network of column electrodes, cells being formed at the intersections of the line and column electrodes, said process comprising:applying to all the line electrodes, sustain signals made of a succession of strobes established with a given period with respect to a reference potential applied to the column electrodes, each period comprising an addressing cycle comprising at least one semi-selective addressing and at least one selective addressing, each type of addressing comprising applying to at least one selected line electrode an addressing pulse whose voltage is added to a line voltage already present on this electrode, with a view to applying to the terminals of cells formed by this selected electrode an addressing voltage of given value corresponding to the addressing to be performed, wherein for at least one of the semi-selective addressing and the selective addressing, the addressing pulse has an amplitude below that which is appropriate for obtaining the required addressing voltage, and in that to obtain the required addressing voltage, the process comprises one of: (1) modifying the reference potential applied to the column electrodes, (2) modifying the line voltage already present on the selected line electrode when the addressing pulse is applied, and (3) in modifying the line voltage as well as the reference potential applied to the column electrodes.