Abstract: A method for regulating the biasing voltage of column control circuits of an array screen formed of LEDs distributed in lines and columns, the column control circuits being adapted to turning on at least one LED of a line. The method includes increasing the biasing voltage when the current flowing through at least one activated LED is smaller than a determined luminance current and of decreasing the biasing voltage when the current flowing through each activated LED is equal to the determined luminance current.

Abstract: A method and circuit for displaying an image by activation of pixels of an array screen based on an image stored in digital form in memory point rows of a frame memory, having a stand-by mode that provides, at a frequency proportional to the display frequency, a cyclic succession of offset values; and for each row address of the frame memory, activating pixels of a screen line associated with said address offset by a same offset value based on the read states of the row associated with the address, and/or activating pixels of a screen line associated with the row address based on the read states of the frame memory row associated with the address offset by a same offset value.

Abstract: A method for displaying an image on an array screen by activation of screen pixels arranged in rows and columns, each pixel of a same row corresponding to a memory point of a same memory row, the memory point being set to an activation state when the corresponding pixel is to be activated, including the steps of identifying, among sets of the memory rows, the row sets for which at least one memory point of a row of the set is at the activation state; and successively selecting the only lines corresponding to the rows of the sets of rows identified for the pixel activation. The present invention also provides a device for displaying an image on an array screen.

Abstract: A control signal for controlling a correction circuit for at least one electron beam that scans a screen line by line, the amplitude of which varies along each line according to a curve of a first type determined by line parameters, each of the line parameters varying, from one line to another, according to a curve of the first type determined by column parameters.

Abstract: A method for regulating the biasing voltage of column control circuits of an array screen formed of LEDs distributed in lines and columns, the column control circuits being adapted to turning on at least one LED of a line. The method consists of increasing the biasing voltage when the current flowing through at least one activated LED is smaller than a determined luminance current and of decreasing the biasing voltage when the current flowing through each activated LED is equal to the determined luminance current.

Abstract: A method for displaying an image on an array screen by activation of screen pixels arranged in rows and columns, each pixel of a same row corresponding to a memory point of a same memory row, the memory point being set to an activation state when the corresponding pixel is to be activated, including the steps of identifying, among sets of the memory rows, the row sets for which at least one memory point of a row of the set is at the activation state; and successively selecting the only lines corresponding to the rows of the sets of rows identified for the pixel activation. The present invention also provides a device for displaying an image on an array screen.

Abstract: A method and circuit for displaying an image by activation of pixels of an array screen based on an image stored in digital form in memory point rows of a frame memory, having a stand-by mode that provides, at a frequency proportional to the display frequency, a cyclic succession of offset values; and for each row address of the frame memory, activating pixels of a screen line associated with said address offset by a same offset value based on the read states of the row associated with the address, and/or activating pixels of a screen line associated with the row address based on the read states of the frame memory row associated with the address offset by a same offset value.

Abstract: A method for regulating the biasing voltage of column control circuits of an array screen formed of LEDs distributed in lines and columns, the column control circuits being adapted to turning on at least one LED of a line. The method consists of increasing the biasing voltage when the current flowing through at least one activated LED is smaller than a determined luminance current and of decreasing the biasing voltage when the current flowing through each activated LED is equal to the determined luminance current.

Abstract: An digital-analog converter uses at least 2.sup.N -1 identical current sources capable of being calibrated to convert a number encoded on N bits and an additional current source designed to replace one of the 2.sup.N -1 current sources during the calibration of one of said sources. The additional current source is connected to the output by means of a sole additional commutator.