Active-matrix display, the emitters of which are supplied by voltage-controlled current generators

Active-matrix display comprising an array of light emitters of the current-controllable type and an array of pixel circuits, each comprising at least one of said emitters that are distributed in rows and columns, at least one generator for supplying said emitters having first and second supply output terminals, at least one circuit capable of selecting pixel circuits for any one row and at least one circuit capable of simultaneously addressing a voltage representative of an image datum to be displayed at each of the pixel circuits of any one row selected, where each pixel circuit comprises, in addition to at least one emitter:

• a voltage-controlled current modulation transistor, comprising a voltage drive electrode and two current electrodes, namely what is called a source electrode and what is called a drain electrode which is connected to said first supply output terminal of the at least one generator;
• a first switch and a second switch, each provided with a drive electrode;
• and
• a memory element capable of charging and maintaining, over the duration of display of an image, a drive voltage on said drive electrode of the modulation transistor,
• in which the at least one data address circuit comprises, for each column of pixels, first and second column electrodes, a differential amplifier having an output connected to said first column electrode, an inverting input connected to said second column electrode, and a non-inverting input for addressing said voltage representative of an image datum,
• said first column electrode being able to be connected to the drive electrode of the modulation transistor of each of the pixel circuits of said column by means of said first switch of this circuit,
• said second column electrode being able to be connected to said source electrode of the current modulation transistor of each of the same pixel circuits by means of said second switch of this circuit and
• in which the at least one row select circuit comprises, for each row of pixels, at least one row electrode that is connected to the drive electrode of the first and second switches of each of the pixel circuits of this row,
• wherein:
• the at least one data address circuit comprises, for each column of pixels, a passive element having two terminals, one being connected to said second column electrode of said column, the other being connected to the second supply output terminal of the at least one generator;
• and
• said display includes at least a third switch able to connect, through the at least one emitter of each of the pixel circuits, said source electrode of the current modulation transistor of said pixel circuit to the second supply output terminal of the at least one generator.