Method and system for programming, calibrating and driving a light emitting device display
First Claim
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1. A method of driving a display array, the display array including a plurality of pixel circuits, each pixel circuit including a driving transistor, at least one switch transistor, a storage capacitor and an organic light emitting device, the method comprising the steps of:
- applying a current or voltage to the organic light emitting device;
monitoring a current or voltage flowing through the organic light emitting device;
predicting a shift in the voltage of the organic light emitting device, based on the monitored current or voltage and determining the state of the pixel circuit, the predicting including estimating an intermediate voltage of the organic light emitting diode, wherein the estimating includes adjusting the intermediate voltage based on a resolution of a driver circuit coupled to the driving transistor and increasing the intermediate voltage by the resolution of the driver circuit responsive to an actual voltage shift being larger than the intermediate voltage; and
providing, to the organic light emitting device, a bias associated with the shift in the voltage of the organic light emitting device.
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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.
137 Citations
9 Claims
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1. A method of driving a display array, the display array including a plurality of pixel circuits, each pixel circuit including a driving transistor, at least one switch transistor, a storage capacitor and an organic light emitting device, the method comprising the steps of:
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applying a current or voltage to the organic light emitting device; monitoring a current or voltage flowing through the organic light emitting device; predicting a shift in the voltage of the organic light emitting device, based on the monitored current or voltage and determining the state of the pixel circuit, the predicting including estimating an intermediate voltage of the organic light emitting diode, wherein the estimating includes adjusting the intermediate voltage based on a resolution of a driver circuit coupled to the driving transistor and increasing the intermediate voltage by the resolution of the driver circuit responsive to an actual voltage shift being larger than the intermediate voltage; and providing, to the organic light emitting device, a bias associated with the shift in the voltage of the organic light emitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of driving a display array, the display array including a plurality of pixel circuits, each pixel circuit including a driving transistor, at least one switch transistor, a storage capacitor and an organic light emitting device (OLED), the method comprising the steps of:
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applying a current or voltage to the OLED; monitoring a current or voltage flowing through the OLED; predicting a shift in the voltage of the OLED, based on the monitored current or voltage and determining the state of the pixel circuit; and providing, to the OLED, a bias associated with the shift in the voltage of the OLED, wherein the monitoring the current or voltage includes; during a first operating cycle of an extraction cycle, activating a first select line to couple a data line to a gate of the driving transistor through the at least one switch transistor; during the first operating cycle, activating a second select line to couple a monitor line to a drain of the driving transistor through a second switch transistor connected to the driving transistor; during the first operating cycle, applying a first current or a first voltage to the light emitting device via the monitor line while maintaining the data line at a first potential; and during a second operating cycle following the first operating cycle, deactivating the first select line while the second select line remains activated and the data line remains at the first potential; and extracting a monitored voltage or monitored current from the OLED via the monitor line.
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9. A method of driving a display array, the display array including a plurality of pixel circuits, each pixel circuit including a driving transistor, at least one switch transistor, a storage capacitor and an organic light emitting device (OLED), the method comprising the steps of:
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applying a current or voltage to the OLED; monitoring a current or voltage flowing through the OLED; predicting a shift in the voltage of the OLED, based on the monitored current or voltage and determining the state of the pixel circuit, wherein the predicting includes estimating an intermediate voltage of the OLED, the estimating including adjusting the intermediate voltage based on a resolution of a driver circuit coupled to the driving transistor and decreasing the intermediate voltage by the resolution of the driver circuit responsive to an actual voltage shift being larger than the intermediate voltage; and providing, to the OLED, a bias associated with the shift in the voltage of the OLED.
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Specification