Low Power Digital Driving of Active Matrix Displays
AssigneesImec Vzw, Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorJan Genoe
Life of this patent
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Abstract
Digital driving circuitry for driving an active matrix display comprising a plurality of pixels logically organized in a plurality of rows and a plurality of columns, each pixel comprising a light emitting element, comprises a current driver for each of the plurality of columns for driving a predetermined current through the corresponding column, the predetermined current being proportional to the number of pixels that are ON in that column. The digital driving circuitry further comprises digital select line driving circuitry for sequentially selecting the plurality of rows, and digital data line driving circuitry for writing digital image codes to the pixels in a selected row, synchronized with the digital select line driving circuitry.
Claims15
1-14. (canceled)
Digital driving circuitry for driving an active matrix display, the display comprising a plurality of pixels logically organized in a plurality of rows and a plurality of columns, each pixel comprising a light emitting element, wherein the driving circuitry comprises:
- current driver circuitry for each of the plurality of columns and configured to drive a predetermined current through the corresponding column, the predetermined current being proportional to the number of pixels that are ON in that column,
- digital select line driving circuitry configured to sequentially select the plurality of rows, and
- digital data line driving circuitry configured to write digital image codes to the pixels in a selected row, synchronized with the digital select line driving circuitry.
A method for digital driving of an active matrix display, the display comprising a plurality of pixels logically organized in a plurality of rows and a plurality of columns, the method comprising:
- sequentially selecting each of the plurality of rows using digital select line driving circuitry;
- writing digital image data to the pixels in a selected row using digital data line driving circuitry;
- and
- driving a predetermined current through each column, the predetermined current for a given column being proportional to the number of pixels that are ON in that column.
Dependencies are inferred from the claim text.