Stable driving scheme for active matrix displays
First Claim
1. A method of operating a pixel array having pixel circuits arranged in rows, comprising the step of repeating an operation cycle defining a frame period for the pixel circuits, including at each frame period:
- programming a first of the pixel circuits in a first row of the rows of pixel circuits by activating a select line a first time to select the first pixel for programming;
responsive to the select line being deactivated, driving the first pixel circuit while the select line remains deactivated; and
activating the select line a second time, prior to the next frame period, to cause the first pixel circuit to be turned off to relax the first pixel circuit and to simultaneously reset a second pixel circuit in an other row of the rows for a programming operation to program the second pixel circuit,wherein the select line is deactivated between the first time it is activated and the second time it is activated, andwherein a period between the second time the select line is activated and an end of the frame period is fixed.
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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
5 Claims
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1. A method of operating a pixel array having pixel circuits arranged in rows, comprising the step of repeating an operation cycle defining a frame period for the pixel circuits, including at each frame period:
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programming a first of the pixel circuits in a first row of the rows of pixel circuits by activating a select line a first time to select the first pixel for programming; responsive to the select line being deactivated, driving the first pixel circuit while the select line remains deactivated; and activating the select line a second time, prior to the next frame period, to cause the first pixel circuit to be turned off to relax the first pixel circuit and to simultaneously reset a second pixel circuit in an other row of the rows for a programming operation to program the second pixel circuit, wherein the select line is deactivated between the first time it is activated and the second time it is activated, and wherein a period between the second time the select line is activated and an end of the frame period is fixed. - View Dependent Claims (2, 3, 4, 5)
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Specification