Systems and methods for aging compensation in AMOLED displays
First Claim
1. A system for compensating a pixel in a display array, the system comprising:
- a pixel circuit for being programmed according to programming information, during a programming cycle, and driven to emit light according to the programming information, during an emission cycle, the pixel circuit comprising;
a light emitting device for emitting light during the emission cycle,a driving transistor for conveying current through the light emitting device during the emission cycle,a storage capacitor for being charged with a voltage based at least in part on the programming information, during the programming cycle, andan emission control transistor coupled to at least two of the light emitting device, the driving transistor, and the storage capacitor, and for disconnecting said at least two of the driving transistor, the light emitting device, and the storage capacitor, such that a perturbation of the charging of the storage capacitor during the programming cycle by at least one of the driving transistor and the light emitting device is prevented,the storage capacitor and the emission control transistor coupled in series and coupled directly to a node between the driving transistor and the light emitting device;
a driver for programming the pixel circuit via a data line by charging the storage capacitor according to the programming information; and
a controller for operating the driver and configured to;
receive a data input indicative of an amount of luminance to be emitted from the light emitting device; and
provide the programming information to the driver to program the pixel circuit, wherein the programming information is based at least in part on the received data input.
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Accused Products
Abstract
Circuits for programming, monitoring, and driving pixels in a display are provided. Circuits generally include a driving transistor to drive current through a light emitting device according to programming information which is stored on a storage device, such as a capacitor. One or more switching transistors are generally included to select the circuits for programming, monitoring, and/or emission. Circuits advantageously incorporate emission transistors to selectively couple the gate and source terminals of a driving transistor to allow programming information to be applied to the driving transistor independently of a resistance of a switching transistor.
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Citations
22 Claims
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1. A system for compensating a pixel in a display array, the system comprising:
a pixel circuit for being programmed according to programming information, during a programming cycle, and driven to emit light according to the programming information, during an emission cycle, the pixel circuit comprising; a light emitting device for emitting light during the emission cycle, a driving transistor for conveying current through the light emitting device during the emission cycle, a storage capacitor for being charged with a voltage based at least in part on the programming information, during the programming cycle, and an emission control transistor coupled to at least two of the light emitting device, the driving transistor, and the storage capacitor, and for disconnecting said at least two of the driving transistor, the light emitting device, and the storage capacitor, such that a perturbation of the charging of the storage capacitor during the programming cycle by at least one of the driving transistor and the light emitting device is prevented, the storage capacitor and the emission control transistor coupled in series and coupled directly to a node between the driving transistor and the light emitting device; a driver for programming the pixel circuit via a data line by charging the storage capacitor according to the programming information; and a controller for operating the driver and configured to; receive a data input indicative of an amount of luminance to be emitted from the light emitting device; and provide the programming information to the driver to program the pixel circuit, wherein the programming information is based at least in part on the received data input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pixel circuit for driving a light emitting device, the pixel circuit comprising:
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a driving transistor for driving current through a light emitting device according to a driving voltage applied across the driving transistor; a storage capacitor for being charged, during a programming cycle, with the driving voltage; and an emission control transistor coupled to at least two of the driving transistor, the light emitting device, and the storage capacitor and for disconnecting said at least two of the driving transistor, the light emitting device, and the storage capacitor, such that a perturbation of the charging of the storage capacitor during the programming cycle by at least one of the driving transistor and the light emitting device is prevented the storage capacitor and the emission control transistor coupled in series and coupled directly to a node between the driving transistor and the light emitting device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification