Stable driving scheme for active matrix displays
First Claim
1. A method of operating a pixel array having pixel circuits, each pixel circuit including a drive transistor and a light emitting device, and driven by repeating an operation cycle defining a frame period for each pixel circuit, the method comprising:
- selecting a first pixel circuit while selecting a second pixel circuit; and
during said selecting the first pixel circuit while selecting the second pixel circuit, providing to the first pixel circuit and not to the second pixel circuit, a first supply voltage over a first controllable power supply line coupled to the first pixel circuit while providing to the second pixel circuit and not to the first pixel circuit, a second supply voltage over a second controllable power supply line coupled to the second pixel circuit during a first operation cycle of a frame period of the first pixel circuit overlapping in time with a second operation cycle of a frame period of the second pixel circuit, the first supply voltage different from the second supply voltage.
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Accused Products
Abstract
A method and system for operating a pixel array having at least one pixel circuit is provided. The method includes repeating an operation cycle defining a frame period for a pixel circuit, including at each frame period, programming the pixel circuit, driving the pixel circuit, and relaxing a stress effect on the pixel circuit, prior to a next frame period. The system includes a pixel array including a plurality of pixel circuits and a plurality of lines for operation of the plurality of pixel circuits. Each of the pixel circuits includes a light emitting device, a storage capacitor, and a drive circuit connected to the light emitting device and the storage capacitor. The system includes a drive for operating the plurality of lines to repeat an operation cycle having a frame period so that each of the operation cycle comprises a programming cycle, a driving cycle and a relaxing cycle for relaxing a stress on a pixel circuit, prior to a next frame period.
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Citations
10 Claims
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1. A method of operating a pixel array having pixel circuits, each pixel circuit including a drive transistor and a light emitting device, and driven by repeating an operation cycle defining a frame period for each pixel circuit, the method comprising:
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selecting a first pixel circuit while selecting a second pixel circuit; and during said selecting the first pixel circuit while selecting the second pixel circuit, providing to the first pixel circuit and not to the second pixel circuit, a first supply voltage over a first controllable power supply line coupled to the first pixel circuit while providing to the second pixel circuit and not to the first pixel circuit, a second supply voltage over a second controllable power supply line coupled to the second pixel circuit during a first operation cycle of a frame period of the first pixel circuit overlapping in time with a second operation cycle of a frame period of the second pixel circuit, the first supply voltage different from the second supply voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification