Thomson-csf

Andr&eacute; Dunand

Serge Salavin

Philippe Zorzan

A method for activating the cells of an image display screen. Electric potential signals called activation signals are produced to activate the cells and to supply the current consumed by this activation. An electric potential is applied to a solenoid so as to develop the activation signals at the solenoid terminals and to cause a change in the main current in the solenoid which serves as the current consumed by the cell activation. Thus, cell activation control of the &ldquo;current supply&rdquo; type is effected, and is particularly suited for the delivery of large amounts of current in a short time. This may be used in image display screens such as plasma panels.

Method for activating the cells of an image displaying screen, and image displaying device using same

A process for controlling a display panel having cells defined by the intersection of two networks of crossed electrodes. The cells have two states, one written and the other erased. A square-wave hold signal on either side of a middle potential is applied to all the cells to produce a hold discharge with regard to the cells in the written state, at the termination of the edges leading to an extreme porch. It also includes applying an addressing signal superimposed on the hold signal in succession to the electrodes of a network. The addressing signal includes a semi-erase-selective signal generating, with regard to the cells linked to the selected electrode, an erase discharge at the termination of an edge leading to an extreme porch of the hold signal. This disables the whole discharge generated by the hold signal alone. This method is applicable to the control of plasma display panels.

Growing community of inventors

Voreppe, France

André Dunand

Growing community of inventors

Voreppe, France

Andr&eacute; Dunand

André Dunand