Image display device with capacitive energy recovery
AssigneeThomson Licensing
InventorJean-Paul Dagois
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Abstract
Device comprising a display panel, preferably organic electroluminescent with passive matrix, comprising an array of columns and an array of rows of electrodes for powering an array of cells and drive means adapted for successively connecting each row electrode to one of the terminals of power supply means of this panel, and during a sequence of connection of a row electrode, for simultaneously connecting one or more column electrodes to the other terminal of the power supply means, and for being able to transfer to each cell to thus be powered the charge of the intrinsic capacitors of the cells linked to the same column electrode as this cell to be powered.
Claims9
A device for displaying images comprising:
- an image display panel comprising a first array and a second array of electrodes which serve an array of cells, where each cell is powered between an electrode of the first array and an electrode of the second array effecting between them an intrinsic capacitor Ci,
- power supply means for generating a potential difference between two terminals,
- drive means adapted for successively connecting each electrode of the second array to one of the terminals of the power supply means, and, during a sequence of connection of an electrode of the second array, for simultaneously connecting one or more or even all the electrodes of the first array to the other terminal of the power supply means,
- wherein the drive means are adapted for being able, during each sequence of connection of an electrode of the second array, to transfer to the cell powered between each electrode of the first array and this electrode of the second array, the charge of the intrinsic capacitors of the other cells linked to the same electrode of the first array.
Dependencies are inferred from the claim text.