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US 7,619,597 B2Granted
Method and system for programming, calibrating and driving a light emitting device display
AssigneeIgnis Innovation Inc.
InventorsArokia Nathan, Gholamreza Reza Chaji, Peyman Servati
Life of this patent
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Abstract
A method and system for programming, calibrating and driving a light emitting device display is provided. The system may include extracting a time dependent parameter of a pixel for calibration.
Claims26
A method of real-time calibration for a display array having a plurality of pixel circuits arranged in rows and columns, the method comprising:
- generating a priority list of pixels, associating calibration priorities with a plurality of pixel circuits from the pixel circuits of the display array;
- selecting one or more pixels (n) from the priority list, the n selected pixels having the highest calibration priorities of a set of pixels in the priority list that are from a column of the display array being programmed;
- programming each of the n selected pixels in the column, with a respective driving voltage;
- monitoring a pixel current of each of the n selected pixels;
- determining calibration information for each of the n selected pixels based on their respective driving voltages and their monitored pixel currents;
- updating a compensation voltage of the n selected pixels stored in a memory based on the calibration information;
- and
- updating the priority list to associate a lowest calibration priority with each of the n selected pixels.
5 more elements
A system for real-time calibration for a display array having a plurality of pixel circuits arranged in rows and columns, the system comprising:
- a voltage driver for providing a plurality of driving voltages for programming a plurality of pixels in a column of the display array being programmed;
- a calibration scheduler for selecting one or more pixels (n) from a priority list of pixels, the priority list, associating calibration priorities with a plurality of pixel circuits from the pixel circuits of the display array, the n selected pixels having the highest calibration priorities of a set of pixels in the priority list that are from the column of the display array being programmed;
- a monitor for selectively coupling the voltage driver to the n selected pixels in the display array and measuring a pixel current of each of the n selected pixels;
- a compensation voltage generator for generating a compensation voltage for each of the n selected pixels based on the measured n pixel currents;
- and
- a compensation memory for storing the compensation voltages of the n selected pixels.
3 more elements
Dependencies are inferred from the claim text.